[gentoo-commits] proj/linux-patches:4.4 commit in: /

[Mike Pagano]

commit:     833529f439f2d25ab9197573f88dad1b0544ebb5
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Wed Mar 11 10:14:28 2020 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Wed Mar 11 10:14:28 2020 +0000
URL:        https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=833529f4

Linux patch 4.4.216

Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org>

 0000_README              |    4 +
 1215_linux-4.4.216.patch | 2919 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 2923 insertions(+)

diff --git a/0000_README b/0000_README
index b4dfa87..5c1fd6b 100644
--- a/0000_README
+++ b/0000_README
@@ -903,6 +903,10 @@ Patch:  1214_linux-4.4.215.patch
 From:   http://www.kernel.org
 Desc:   Linux 4.4.215
 
+Patch:  1215_linux-4.4.216.patch
+From:   http://www.kernel.org
+Desc:   Linux 4.4.216
+
 Patch:  1500_XATTR_USER_PREFIX.patch
 From:   https://bugs.gentoo.org/show_bug.cgi?id=470644
 Desc:   Support for namespace user.pax.* on tmpfs.

diff --git a/1215_linux-4.4.216.patch b/1215_linux-4.4.216.patch
new file mode 100644
index 0000000..04d770a
--- /dev/null
+++ b/1215_linux-4.4.216.patch
@@ -0,0 +1,2919 @@
+diff --git a/Makefile b/Makefile
+index 9118ca43acb4..e0bcd5a0ae9b 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,6 +1,6 @@
+ VERSION = 4
+ PATCHLEVEL = 4
+-SUBLEVEL = 215
++SUBLEVEL = 216
+ EXTRAVERSION =
+ NAME = Blurry Fish Butt
+ 
+diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
+index fb689d813b09..6358ea48eaf9 100644
+--- a/arch/arm/mach-imx/Makefile
++++ b/arch/arm/mach-imx/Makefile
+@@ -91,6 +91,8 @@ AFLAGS_suspend-imx6.o :=-Wa,-march=armv7-a
+ obj-$(CONFIG_SOC_IMX6) += suspend-imx6.o
+ obj-$(CONFIG_SOC_IMX53) += suspend-imx53.o
+ endif
++AFLAGS_resume-imx6.o :=-Wa,-march=armv7-a
++obj-$(CONFIG_SOC_IMX6) += resume-imx6.o
+ obj-$(CONFIG_SOC_IMX6) += pm-imx6.o
+ 
+ obj-$(CONFIG_SOC_IMX50) += mach-imx50.o
+diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
+index e2d53839fceb..288f57222745 100644
+--- a/arch/arm/mach-imx/common.h
++++ b/arch/arm/mach-imx/common.h
+@@ -115,17 +115,17 @@ void imx_cpu_die(unsigned int cpu);
+ int imx_cpu_kill(unsigned int cpu);
+ 
+ #ifdef CONFIG_SUSPEND
+-void v7_cpu_resume(void);
+ void imx53_suspend(void __iomem *ocram_vbase);
+ extern const u32 imx53_suspend_sz;
+ void imx6_suspend(void __iomem *ocram_vbase);
+ #else
+-static inline void v7_cpu_resume(void) {}
+ static inline void imx53_suspend(void __iomem *ocram_vbase) {}
+ static const u32 imx53_suspend_sz;
+ static inline void imx6_suspend(void __iomem *ocram_vbase) {}
+ #endif
+ 
++void v7_cpu_resume(void);
++
+ void imx6_pm_ccm_init(const char *ccm_compat);
+ void imx6q_pm_init(void);
+ void imx6dl_pm_init(void);
+diff --git a/arch/arm/mach-imx/resume-imx6.S b/arch/arm/mach-imx/resume-imx6.S
+new file mode 100644
+index 000000000000..5bd1ba7ef15b
+--- /dev/null
++++ b/arch/arm/mach-imx/resume-imx6.S
+@@ -0,0 +1,24 @@
++/* SPDX-License-Identifier: GPL-2.0-or-later */
++/*
++ * Copyright 2014 Freescale Semiconductor, Inc.
++ */
++
++#include <linux/linkage.h>
++#include <asm/assembler.h>
++#include <asm/asm-offsets.h>
++#include <asm/hardware/cache-l2x0.h>
++#include "hardware.h"
++
++/*
++ * The following code must assume it is running from physical address
++ * where absolute virtual addresses to the data section have to be
++ * turned into relative ones.
++ */
++
++ENTRY(v7_cpu_resume)
++	bl	v7_invalidate_l1
++#ifdef CONFIG_CACHE_L2X0
++	bl	l2c310_early_resume
++#endif
++	b	cpu_resume
++ENDPROC(v7_cpu_resume)
+diff --git a/arch/arm/mach-imx/suspend-imx6.S b/arch/arm/mach-imx/suspend-imx6.S
+index 76ee2ceec8d5..7d84b617af48 100644
+--- a/arch/arm/mach-imx/suspend-imx6.S
++++ b/arch/arm/mach-imx/suspend-imx6.S
+@@ -333,17 +333,3 @@ resume:
+ 
+ 	ret	lr
+ ENDPROC(imx6_suspend)
+-
+-/*
+- * The following code must assume it is running from physical address
+- * where absolute virtual addresses to the data section have to be
+- * turned into relative ones.
+- */
+-
+-ENTRY(v7_cpu_resume)
+-	bl	v7_invalidate_l1
+-#ifdef CONFIG_CACHE_L2X0
+-	bl	l2c310_early_resume
+-#endif
+-	b	cpu_resume
+-ENDPROC(v7_cpu_resume)
+diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
+index 9067b651c7a2..ca93984ff5a6 100644
+--- a/arch/mips/kernel/vpe.c
++++ b/arch/mips/kernel/vpe.c
+@@ -134,7 +134,7 @@ void release_vpe(struct vpe *v)
+ {
+ 	list_del(&v->list);
+ 	if (v->load_addr)
+-		release_progmem(v);
++		release_progmem(v->load_addr);
+ 	kfree(v);
+ }
+ 
+diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
+index 7d80bfdfb15e..7ad686009795 100644
+--- a/arch/powerpc/kernel/cputable.c
++++ b/arch/powerpc/kernel/cputable.c
+@@ -2147,11 +2147,13 @@ static struct cpu_spec * __init setup_cpu_spec(unsigned long offset,
+ 		 * oprofile_cpu_type already has a value, then we are
+ 		 * possibly overriding a real PVR with a logical one,
+ 		 * and, in that case, keep the current value for
+-		 * oprofile_cpu_type.
++		 * oprofile_cpu_type. Futhermore, let's ensure that the
++		 * fix for the PMAO bug is enabled on compatibility mode.
+ 		 */
+ 		if (old.oprofile_cpu_type != NULL) {
+ 			t->oprofile_cpu_type = old.oprofile_cpu_type;
+ 			t->oprofile_type = old.oprofile_type;
++			t->cpu_features |= old.cpu_features & CPU_FTR_PMAO_BUG;
+ 		}
+ 	}
+ 
+diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c
+index 7ad41be8b373..4f7dad36b3c1 100644
+--- a/arch/s390/mm/gup.c
++++ b/arch/s390/mm/gup.c
+@@ -37,7 +37,8 @@ static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
+ 			return 0;
+ 		VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
+ 		page = pte_page(pte);
+-		if (!page_cache_get_speculative(page))
++		if (WARN_ON_ONCE(page_ref_count(page) < 0)
++		    || !page_cache_get_speculative(page))
+ 			return 0;
+ 		if (unlikely(pte_val(pte) != pte_val(*ptep))) {
+ 			put_page(page);
+@@ -76,7 +77,8 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,
+ 		refs++;
+ 	} while (addr += PAGE_SIZE, addr != end);
+ 
+-	if (!page_cache_add_speculative(head, refs)) {
++	if (WARN_ON_ONCE(page_ref_count(head) < 0)
++	    || !page_cache_add_speculative(head, refs)) {
+ 		*nr -= refs;
+ 		return 0;
+ 	}
+diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
+index 7d2542ad346a..6612d532e42e 100644
+--- a/arch/x86/mm/gup.c
++++ b/arch/x86/mm/gup.c
+@@ -95,7 +95,10 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr,
+ 		}
+ 		VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
+ 		page = pte_page(pte);
+-		get_page(page);
++		if (unlikely(!try_get_page(page))) {
++			pte_unmap(ptep);
++			return 0;
++		}
+ 		SetPageReferenced(page);
+ 		pages[*nr] = page;
+ 		(*nr)++;
+@@ -132,6 +135,8 @@ static noinline int gup_huge_pmd(pmd_t pmd, unsigned long addr,
+ 
+ 	refs = 0;
+ 	head = pmd_page(pmd);
++	if (WARN_ON_ONCE(page_ref_count(head) <= 0))
++		return 0;
+ 	page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
+ 	do {
+ 		VM_BUG_ON_PAGE(compound_head(page) != head, page);
+@@ -208,6 +213,8 @@ static noinline int gup_huge_pud(pud_t pud, unsigned long addr,
+ 
+ 	refs = 0;
+ 	head = pud_page(pud);
++	if (WARN_ON_ONCE(page_ref_count(head) <= 0))
++		return 0;
+ 	page = head + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
+ 	do {
+ 		VM_BUG_ON_PAGE(compound_head(page) != head, page);
+diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
+index d12782dc9683..9bd4691cc5c5 100644
+--- a/crypto/algif_skcipher.c
++++ b/crypto/algif_skcipher.c
+@@ -538,7 +538,7 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
+ 	lock_sock(sk);
+ 	tx_nents = skcipher_all_sg_nents(ctx);
+ 	sreq->tsg = kcalloc(tx_nents, sizeof(*sg), GFP_KERNEL);
+-	if (unlikely(!sreq->tsg))
++	if (unlikely(ZERO_OR_NULL_PTR(sreq->tsg)))
+ 		goto unlock;
+ 	sg_init_table(sreq->tsg, tx_nents);
+ 	memcpy(iv, ctx->iv, ivsize);
+diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
+index 67d23ed2d1a0..29082d99264e 100644
+--- a/drivers/char/ipmi/ipmi_ssif.c
++++ b/drivers/char/ipmi/ipmi_ssif.c
+@@ -742,10 +742,14 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
+ 	flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
+ 	msg = ssif_info->curr_msg;
+ 	if (msg) {
++		if (data) {
++			if (len > IPMI_MAX_MSG_LENGTH)
++				len = IPMI_MAX_MSG_LENGTH;
++			memcpy(msg->rsp, data, len);
++		} else {
++			len = 0;
++		}
+ 		msg->rsp_size = len;
+-		if (msg->rsp_size > IPMI_MAX_MSG_LENGTH)
+-			msg->rsp_size = IPMI_MAX_MSG_LENGTH;
+-		memcpy(msg->rsp, data, msg->rsp_size);
+ 		ssif_info->curr_msg = NULL;
+ 	}
+ 
+diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
+index 4746fee4cd48..546a91186de1 100644
+--- a/drivers/dma/coh901318.c
++++ b/drivers/dma/coh901318.c
+@@ -1960,8 +1960,6 @@ static void dma_tc_handle(struct coh901318_chan *cohc)
+ 		return;
+ 	}
+ 
+-	spin_lock(&cohc->lock);
+-
+ 	/*
+ 	 * When we reach this point, at least one queue item
+ 	 * should have been moved over from cohc->queue to
+@@ -1982,8 +1980,6 @@ static void dma_tc_handle(struct coh901318_chan *cohc)
+ 	if (coh901318_queue_start(cohc) == NULL)
+ 		cohc->busy = 0;
+ 
+-	spin_unlock(&cohc->lock);
+-
+ 	/*
+ 	 * This tasklet will remove items from cohc->active
+ 	 * and thus terminates them.
+diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
+index 67f201b8dcda..b5cf5d36de2b 100644
+--- a/drivers/dma/tegra20-apb-dma.c
++++ b/drivers/dma/tegra20-apb-dma.c
+@@ -285,7 +285,7 @@ static struct tegra_dma_desc *tegra_dma_desc_get(
+ 
+ 	/* Do not allocate if desc are waiting for ack */
+ 	list_for_each_entry(dma_desc, &tdc->free_dma_desc, node) {
+-		if (async_tx_test_ack(&dma_desc->txd)) {
++		if (async_tx_test_ack(&dma_desc->txd) && !dma_desc->cb_count) {
+ 			list_del(&dma_desc->node);
+ 			spin_unlock_irqrestore(&tdc->lock, flags);
+ 			dma_desc->txd.flags = 0;
+@@ -754,10 +754,6 @@ static int tegra_dma_terminate_all(struct dma_chan *dc)
+ 	bool was_busy;
+ 
+ 	spin_lock_irqsave(&tdc->lock, flags);
+-	if (list_empty(&tdc->pending_sg_req)) {
+-		spin_unlock_irqrestore(&tdc->lock, flags);
+-		return 0;
+-	}
+ 
+ 	if (!tdc->busy)
+ 		goto skip_dma_stop;
+diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
+index 0455ff75074a..34220df1265f 100644
+--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
++++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
+@@ -302,7 +302,7 @@ static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
+ 	return num;
+ }
+ 
+-static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
++static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
+ 				struct drm_display_mode *mode)
+ {
+ 	int id = dsi_mgr_connector_get_id(connector);
+@@ -434,6 +434,7 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
+ 	struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
+ 	struct mipi_dsi_host *host = msm_dsi->host;
+ 	struct drm_panel *panel = msm_dsi->panel;
++	struct msm_dsi_pll *src_pll;
+ 	bool is_dual_dsi = IS_DUAL_DSI();
+ 	int ret;
+ 
+@@ -467,6 +468,10 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
+ 								id, ret);
+ 	}
+ 
++	/* Save PLL status if it is a clock source */
++	src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
++	msm_dsi_pll_save_state(src_pll);
++
+ 	ret = msm_dsi_host_power_off(host);
+ 	if (ret)
+ 		pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
+diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
+index 16ff8d3c7cfe..325adbef134c 100644
+--- a/drivers/hid/hid-core.c
++++ b/drivers/hid/hid-core.c
+@@ -1508,7 +1508,9 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size,
+ 
+ 	rsize = ((report->size - 1) >> 3) + 1;
+ 
+-	if (rsize > HID_MAX_BUFFER_SIZE)
++	if (report_enum->numbered && rsize >= HID_MAX_BUFFER_SIZE)
++		rsize = HID_MAX_BUFFER_SIZE - 1;
++	else if (rsize > HID_MAX_BUFFER_SIZE)
+ 		rsize = HID_MAX_BUFFER_SIZE;
+ 
+ 	if (csize < rsize) {
+diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
+index 8903ea09ac58..dbdd265075da 100644
+--- a/drivers/hid/usbhid/hiddev.c
++++ b/drivers/hid/usbhid/hiddev.c
+@@ -962,9 +962,9 @@ void hiddev_disconnect(struct hid_device *hid)
+ 	hiddev->exist = 0;
+ 
+ 	if (hiddev->open) {
+-		mutex_unlock(&hiddev->existancelock);
+ 		usbhid_close(hiddev->hid);
+ 		wake_up_interruptible(&hiddev->wait);
++		mutex_unlock(&hiddev->existancelock);
+ 	} else {
+ 		mutex_unlock(&hiddev->existancelock);
+ 		kfree(hiddev);
+diff --git a/drivers/hwmon/adt7462.c b/drivers/hwmon/adt7462.c
+index 5929e126da63..d9923d63eb4f 100644
+--- a/drivers/hwmon/adt7462.c
++++ b/drivers/hwmon/adt7462.c
+@@ -426,7 +426,7 @@ static int ADT7462_REG_VOLT(struct adt7462_data *data, int which)
+ 			return 0x95;
+ 		break;
+ 	}
+-	return -ENODEV;
++	return 0;
+ }
+ 
+ /* Provide labels for sysfs */
+diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c
+index 4b58e8aaf5c5..ba3b94505c14 100644
+--- a/drivers/i2c/busses/i2c-jz4780.c
++++ b/drivers/i2c/busses/i2c-jz4780.c
+@@ -82,25 +82,6 @@
+ #define JZ4780_I2C_STA_TFNF		BIT(1)
+ #define JZ4780_I2C_STA_ACT		BIT(0)
+ 
+-static const char * const jz4780_i2c_abrt_src[] = {
+-	"ABRT_7B_ADDR_NOACK",
+-	"ABRT_10ADDR1_NOACK",
+-	"ABRT_10ADDR2_NOACK",
+-	"ABRT_XDATA_NOACK",
+-	"ABRT_GCALL_NOACK",
+-	"ABRT_GCALL_READ",
+-	"ABRT_HS_ACKD",
+-	"SBYTE_ACKDET",
+-	"ABRT_HS_NORSTRT",
+-	"SBYTE_NORSTRT",
+-	"ABRT_10B_RD_NORSTRT",
+-	"ABRT_MASTER_DIS",
+-	"ARB_LOST",
+-	"SLVFLUSH_TXFIFO",
+-	"SLV_ARBLOST",
+-	"SLVRD_INTX",
+-};
+-
+ #define JZ4780_I2C_INTST_IGC		BIT(11)
+ #define JZ4780_I2C_INTST_ISTT		BIT(10)
+ #define JZ4780_I2C_INTST_ISTP		BIT(9)
+@@ -538,21 +519,8 @@ done:
+ 
+ static void jz4780_i2c_txabrt(struct jz4780_i2c *i2c, int src)
+ {
+-	int i;
+-
+-	dev_err(&i2c->adap.dev, "txabrt: 0x%08x\n", src);
+-	dev_err(&i2c->adap.dev, "device addr=%x\n",
+-		jz4780_i2c_readw(i2c, JZ4780_I2C_TAR));
+-	dev_err(&i2c->adap.dev, "send cmd count:%d  %d\n",
+-		i2c->cmd, i2c->cmd_buf[i2c->cmd]);
+-	dev_err(&i2c->adap.dev, "receive data count:%d  %d\n",
+-		i2c->cmd, i2c->data_buf[i2c->cmd]);
+-
+-	for (i = 0; i < 16; i++) {
+-		if (src & BIT(i))
+-			dev_dbg(&i2c->adap.dev, "I2C TXABRT[%d]=%s\n",
+-				i, jz4780_i2c_abrt_src[i]);
+-	}
++	dev_dbg(&i2c->adap.dev, "txabrt: 0x%08x, cmd: %d, send: %d, recv: %d\n",
++		src, i2c->cmd, i2c->cmd_buf[i2c->cmd], i2c->data_buf[i2c->cmd]);
+ }
+ 
+ static inline int jz4780_i2c_xfer_read(struct jz4780_i2c *i2c,
+diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
+index 941cd9b83941..53c622c99ee4 100644
+--- a/drivers/infiniband/core/cm.c
++++ b/drivers/infiniband/core/cm.c
+@@ -1073,6 +1073,7 @@ struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device,
+ 			/* Sharing an ib_cm_id with different handlers is not
+ 			 * supported */
+ 			spin_unlock_irqrestore(&cm.lock, flags);
++			ib_destroy_cm_id(cm_id);
+ 			return ERR_PTR(-EINVAL);
+ 		}
+ 		atomic_inc(&cm_id_priv->refcount);
+diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c
+index ff9163dc1596..c4b779cc3b94 100644
+--- a/drivers/infiniband/core/iwcm.c
++++ b/drivers/infiniband/core/iwcm.c
+@@ -125,8 +125,10 @@ static void dealloc_work_entries(struct iwcm_id_private *cm_id_priv)
+ {
+ 	struct list_head *e, *tmp;
+ 
+-	list_for_each_safe(e, tmp, &cm_id_priv->work_free_list)
++	list_for_each_safe(e, tmp, &cm_id_priv->work_free_list) {
++		list_del(e);
+ 		kfree(list_entry(e, struct iwcm_work, free_list));
++	}
+ }
+ 
+ static int alloc_work_entries(struct iwcm_id_private *cm_id_priv, int count)
+diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
+index 531d6f3a786e..c95139fea15c 100644
+--- a/drivers/md/dm-cache-target.c
++++ b/drivers/md/dm-cache-target.c
+@@ -2193,8 +2193,8 @@ static void wait_for_migrations(struct cache *cache)
+ 
+ static void stop_worker(struct cache *cache)
+ {
+-	cancel_delayed_work(&cache->waker);
+-	flush_workqueue(cache->wq);
++	cancel_delayed_work_sync(&cache->waker);
++	drain_workqueue(cache->wq);
+ }
+ 
+ static void requeue_deferred_cells(struct cache *cache)
+diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c b/drivers/net/ethernet/micrel/ks8851_mll.c
+index 8dc1f0277117..d94e151cff12 100644
+--- a/drivers/net/ethernet/micrel/ks8851_mll.c
++++ b/drivers/net/ethernet/micrel/ks8851_mll.c
+@@ -474,24 +474,6 @@ static int msg_enable;
+  * chip is busy transferring packet data (RX/TX FIFO accesses).
+  */
+ 
+-/**
+- * ks_rdreg8 - read 8 bit register from device
+- * @ks	  : The chip information
+- * @offset: The register address
+- *
+- * Read a 8bit register from the chip, returning the result
+- */
+-static u8 ks_rdreg8(struct ks_net *ks, int offset)
+-{
+-	u16 data;
+-	u8 shift_bit = offset & 0x03;
+-	u8 shift_data = (offset & 1) << 3;
+-	ks->cmd_reg_cache = (u16) offset | (u16)(BE0 << shift_bit);
+-	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
+-	data  = ioread16(ks->hw_addr);
+-	return (u8)(data >> shift_data);
+-}
+-
+ /**
+  * ks_rdreg16 - read 16 bit register from device
+  * @ks	  : The chip information
+@@ -502,27 +484,11 @@ static u8 ks_rdreg8(struct ks_net *ks, int offset)
+ 
+ static u16 ks_rdreg16(struct ks_net *ks, int offset)
+ {
+-	ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02));
++	ks->cmd_reg_cache = (u16)offset | ((BE3 | BE2) >> (offset & 0x02));
+ 	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
+ 	return ioread16(ks->hw_addr);
+ }
+ 
+-/**
+- * ks_wrreg8 - write 8bit register value to chip
+- * @ks: The chip information
+- * @offset: The register address
+- * @value: The value to write
+- *
+- */
+-static void ks_wrreg8(struct ks_net *ks, int offset, u8 value)
+-{
+-	u8  shift_bit = (offset & 0x03);
+-	u16 value_write = (u16)(value << ((offset & 1) << 3));
+-	ks->cmd_reg_cache = (u16)offset | (BE0 << shift_bit);
+-	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
+-	iowrite16(value_write, ks->hw_addr);
+-}
+-
+ /**
+  * ks_wrreg16 - write 16bit register value to chip
+  * @ks: The chip information
+@@ -533,7 +499,7 @@ static void ks_wrreg8(struct ks_net *ks, int offset, u8 value)
+ 
+ static void ks_wrreg16(struct ks_net *ks, int offset, u16 value)
+ {
+-	ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02));
++	ks->cmd_reg_cache = (u16)offset | ((BE3 | BE2) >> (offset & 0x02));
+ 	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
+ 	iowrite16(value, ks->hw_addr);
+ }
+@@ -549,7 +515,7 @@ static inline void ks_inblk(struct ks_net *ks, u16 *wptr, u32 len)
+ {
+ 	len >>= 1;
+ 	while (len--)
+-		*wptr++ = (u16)ioread16(ks->hw_addr);
++		*wptr++ = be16_to_cpu(ioread16(ks->hw_addr));
+ }
+ 
+ /**
+@@ -563,7 +529,7 @@ static inline void ks_outblk(struct ks_net *ks, u16 *wptr, u32 len)
+ {
+ 	len >>= 1;
+ 	while (len--)
+-		iowrite16(*wptr++, ks->hw_addr);
++		iowrite16(cpu_to_be16(*wptr++), ks->hw_addr);
+ }
+ 
+ static void ks_disable_int(struct ks_net *ks)
+@@ -642,8 +608,7 @@ static void ks_read_config(struct ks_net *ks)
+ 	u16 reg_data = 0;
+ 
+ 	/* Regardless of bus width, 8 bit read should always work.*/
+-	reg_data = ks_rdreg8(ks, KS_CCR) & 0x00FF;
+-	reg_data |= ks_rdreg8(ks, KS_CCR+1) << 8;
++	reg_data = ks_rdreg16(ks, KS_CCR);
+ 
+ 	/* addr/data bus are multiplexed */
+ 	ks->sharedbus = (reg_data & CCR_SHARED) == CCR_SHARED;
+@@ -747,7 +712,7 @@ static inline void ks_read_qmu(struct ks_net *ks, u16 *buf, u32 len)
+ 
+ 	/* 1. set sudo DMA mode */
+ 	ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI);
+-	ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff);
++	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
+ 
+ 	/* 2. read prepend data */
+ 	/**
+@@ -764,7 +729,7 @@ static inline void ks_read_qmu(struct ks_net *ks, u16 *buf, u32 len)
+ 	ks_inblk(ks, buf, ALIGN(len, 4));
+ 
+ 	/* 4. reset sudo DMA Mode */
+-	ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr);
++	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
+ }
+ 
+ /**
+@@ -997,13 +962,13 @@ static void ks_write_qmu(struct ks_net *ks, u8 *pdata, u16 len)
+ 	ks->txh.txw[1] = cpu_to_le16(len);
+ 
+ 	/* 1. set sudo-DMA mode */
+-	ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff);
++	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
+ 	/* 2. write status/lenth info */
+ 	ks_outblk(ks, ks->txh.txw, 4);
+ 	/* 3. write pkt data */
+ 	ks_outblk(ks, (u16 *)pdata, ALIGN(len, 4));
+ 	/* 4. reset sudo-DMA mode */
+-	ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr);
++	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
+ 	/* 5. Enqueue Tx(move the pkt from TX buffer into TXQ) */
+ 	ks_wrreg16(ks, KS_TXQCR, TXQCR_METFE);
+ 	/* 6. wait until TXQCR_METFE is auto-cleared */
+diff --git a/drivers/net/phy/mdio-bcm-iproc.c b/drivers/net/phy/mdio-bcm-iproc.c
+index 46fe1ae919a3..51ce3ea17fb3 100644
+--- a/drivers/net/phy/mdio-bcm-iproc.c
++++ b/drivers/net/phy/mdio-bcm-iproc.c
+@@ -188,6 +188,23 @@ static int iproc_mdio_remove(struct platform_device *pdev)
+ 	return 0;
+ }
+ 
++#ifdef CONFIG_PM_SLEEP
++int iproc_mdio_resume(struct device *dev)
++{
++	struct platform_device *pdev = to_platform_device(dev);
++	struct iproc_mdio_priv *priv = platform_get_drvdata(pdev);
++
++	/* restore the mii clock configuration */
++	iproc_mdio_config_clk(priv->base);
++
++	return 0;
++}
++
++static const struct dev_pm_ops iproc_mdio_pm_ops = {
++	.resume = iproc_mdio_resume
++};
++#endif /* CONFIG_PM_SLEEP */
++
+ static const struct of_device_id iproc_mdio_of_match[] = {
+ 	{ .compatible = "brcm,iproc-mdio", },
+ 	{ /* sentinel */ },
+@@ -198,6 +215,9 @@ static struct platform_driver iproc_mdio_driver = {
+ 	.driver = {
+ 		.name = "iproc-mdio",
+ 		.of_match_table = iproc_mdio_of_match,
++#ifdef CONFIG_PM_SLEEP
++		.pm = &iproc_mdio_pm_ops,
++#endif
+ 	},
+ 	.probe = iproc_mdio_probe,
+ 	.remove = iproc_mdio_remove,
+diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
+index 0f8d5609ed51..d4a33baa33b6 100644
+--- a/drivers/net/slip/slip.c
++++ b/drivers/net/slip/slip.c
+@@ -868,7 +868,6 @@ err_free_chan:
+ 	tty->disc_data = NULL;
+ 	clear_bit(SLF_INUSE, &sl->flags);
+ 	sl_free_netdev(sl->dev);
+-	free_netdev(sl->dev);
+ 
+ err_exit:
+ 	rtnl_unlock();
+diff --git a/drivers/net/wireless/iwlwifi/pcie/rx.c b/drivers/net/wireless/iwlwifi/pcie/rx.c
+index d6f9858ff2de..7fdb3ad9f53d 100644
+--- a/drivers/net/wireless/iwlwifi/pcie/rx.c
++++ b/drivers/net/wireless/iwlwifi/pcie/rx.c
+@@ -708,9 +708,13 @@ int iwl_pcie_rx_init(struct iwl_trans *trans)
+ 		if (err)
+ 			return err;
+ 	}
+-	if (!rba->alloc_wq)
++	if (!rba->alloc_wq) {
+ 		rba->alloc_wq = alloc_workqueue("rb_allocator",
+ 						WQ_HIGHPRI | WQ_UNBOUND, 1);
++		if (!rba->alloc_wq)
++			return -ENOMEM;
++	}
++
+ 	INIT_WORK(&rba->rx_alloc, iwl_pcie_rx_allocator_work);
+ 
+ 	cancel_work_sync(&rba->rx_alloc);
+diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
+index fa75c53f3fa5..22522edb6341 100644
+--- a/drivers/nfc/pn544/i2c.c
++++ b/drivers/nfc/pn544/i2c.c
+@@ -241,6 +241,7 @@ static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy)
+ 
+ out:
+ 	gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
++	usleep_range(10000, 15000);
+ }
+ 
+ static void pn544_hci_i2c_enable_mode(struct pn544_i2c_phy *phy, int run_mode)
+diff --git a/drivers/s390/cio/blacklist.c b/drivers/s390/cio/blacklist.c
+index 20314aad7ab7..f329459cadf1 100644
+--- a/drivers/s390/cio/blacklist.c
++++ b/drivers/s390/cio/blacklist.c
+@@ -303,8 +303,10 @@ static void *
+ cio_ignore_proc_seq_next(struct seq_file *s, void *it, loff_t *offset)
+ {
+ 	struct ccwdev_iter *iter;
++	loff_t p = *offset;
+ 
+-	if (*offset >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
++	(*offset)++;
++	if (p >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
+ 		return NULL;
+ 	iter = it;
+ 	if (iter->devno == __MAX_SUBCHANNEL) {
+@@ -314,7 +316,6 @@ cio_ignore_proc_seq_next(struct seq_file *s, void *it, loff_t *offset)
+ 			return NULL;
+ 	} else
+ 		iter->devno++;
+-	(*offset)++;
+ 	return iter;
+ }
+ 
+diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
+index 1519d2ca7705..40194791cde0 100644
+--- a/drivers/tty/serial/ar933x_uart.c
++++ b/drivers/tty/serial/ar933x_uart.c
+@@ -294,6 +294,10 @@ static void ar933x_uart_set_termios(struct uart_port *port,
+ 	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
+ 			    AR933X_UART_CS_HOST_INT_EN);
+ 
++	/* enable RX and TX ready overide */
++	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
++		AR933X_UART_CS_TX_READY_ORIDE | AR933X_UART_CS_RX_READY_ORIDE);
++
+ 	/* reenable the UART */
+ 	ar933x_uart_rmw(up, AR933X_UART_CS_REG,
+ 			AR933X_UART_CS_IF_MODE_M << AR933X_UART_CS_IF_MODE_S,
+@@ -426,6 +430,10 @@ static int ar933x_uart_startup(struct uart_port *port)
+ 	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
+ 			    AR933X_UART_CS_HOST_INT_EN);
+ 
++	/* enable RX and TX ready overide */
++	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
++		AR933X_UART_CS_TX_READY_ORIDE | AR933X_UART_CS_RX_READY_ORIDE);
++
+ 	/* Enable RX interrupts */
+ 	up->ier = AR933X_UART_INT_RX_VALID;
+ 	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
+diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
+index ed27fda13387..def99f020d82 100644
+--- a/drivers/tty/sysrq.c
++++ b/drivers/tty/sysrq.c
+@@ -542,7 +542,6 @@ void __handle_sysrq(int key, bool check_mask)
+ 	 */
+ 	orig_log_level = console_loglevel;
+ 	console_loglevel = CONSOLE_LOGLEVEL_DEFAULT;
+-	pr_info("SysRq : ");
+ 
+         op_p = __sysrq_get_key_op(key);
+         if (op_p) {
+@@ -551,14 +550,15 @@ void __handle_sysrq(int key, bool check_mask)
+ 		 * should not) and is the invoked operation enabled?
+ 		 */
+ 		if (!check_mask || sysrq_on_mask(op_p->enable_mask)) {
+-			pr_cont("%s\n", op_p->action_msg);
++			pr_info("%s\n", op_p->action_msg);
+ 			console_loglevel = orig_log_level;
+ 			op_p->handler(key);
+ 		} else {
+-			pr_cont("This sysrq operation is disabled.\n");
++			pr_info("This sysrq operation is disabled.\n");
++			console_loglevel = orig_log_level;
+ 		}
+ 	} else {
+-		pr_cont("HELP : ");
++		pr_info("HELP : ");
+ 		/* Only print the help msg once per handler */
+ 		for (i = 0; i < ARRAY_SIZE(sysrq_key_table); i++) {
+ 			if (sysrq_key_table[i]) {
+diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
+index 381a2b13682c..9dae02ce4092 100644
+--- a/drivers/tty/vt/selection.c
++++ b/drivers/tty/vt/selection.c
+@@ -13,6 +13,7 @@
+ #include <linux/tty.h>
+ #include <linux/sched.h>
+ #include <linux/mm.h>
++#include <linux/mutex.h>
+ #include <linux/slab.h>
+ #include <linux/types.h>
+ 
+@@ -40,6 +41,7 @@ static volatile int sel_start = -1; 	/* cleared by clear_selection */
+ static int sel_end;
+ static int sel_buffer_lth;
+ static char *sel_buffer;
++static DEFINE_MUTEX(sel_lock);
+ 
+ /* clear_selection, highlight and highlight_pointer can be called
+    from interrupt (via scrollback/front) */
+@@ -156,14 +158,14 @@ static int store_utf8(u16 c, char *p)
+  *	The entire selection process is managed under the console_lock. It's
+  *	 a lot under the lock but its hardly a performance path
+  */
+-int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty)
++static int __set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty)
+ {
+ 	struct vc_data *vc = vc_cons[fg_console].d;
+ 	int sel_mode, new_sel_start, new_sel_end, spc;
+ 	char *bp, *obp;
+ 	int i, ps, pe, multiplier;
+ 	u16 c;
+-	int mode;
++	int mode, ret = 0;
+ 
+ 	poke_blanked_console();
+ 
+@@ -324,7 +326,21 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
+ 		}
+ 	}
+ 	sel_buffer_lth = bp - sel_buffer;
+-	return 0;
++
++	return ret;
++}
++
++int set_selection(const struct tiocl_selection __user *v, struct tty_struct *tty)
++{
++	int ret;
++
++	mutex_lock(&sel_lock);
++	console_lock();
++	ret = __set_selection(v, tty);
++	console_unlock();
++	mutex_unlock(&sel_lock);
++
++	return ret;
+ }
+ 
+ /* Insert the contents of the selection buffer into the
+@@ -350,6 +366,7 @@ int paste_selection(struct tty_struct *tty)
+ 	tty_buffer_lock_exclusive(&vc->port);
+ 
+ 	add_wait_queue(&vc->paste_wait, &wait);
++	mutex_lock(&sel_lock);
+ 	while (sel_buffer && sel_buffer_lth > pasted) {
+ 		set_current_state(TASK_INTERRUPTIBLE);
+ 		if (test_bit(TTY_THROTTLED, &tty->flags)) {
+@@ -362,6 +379,7 @@ int paste_selection(struct tty_struct *tty)
+ 					      count);
+ 		pasted += count;
+ 	}
++	mutex_unlock(&sel_lock);
+ 	remove_wait_queue(&vc->paste_wait, &wait);
+ 	__set_current_state(TASK_RUNNING);
+ 
+diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
+index 6779f733bb83..5b8b6ebebf3e 100644
+--- a/drivers/tty/vt/vt.c
++++ b/drivers/tty/vt/vt.c
+@@ -2687,9 +2687,7 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
+ 	switch (type)
+ 	{
+ 		case TIOCL_SETSEL:
+-			console_lock();
+ 			ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
+-			console_unlock();
+ 			break;
+ 		case TIOCL_PASTESEL:
+ 			ret = paste_selection(tty);
+diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
+index 4c302424c97a..963dd8a4b540 100644
+--- a/drivers/usb/core/hub.c
++++ b/drivers/usb/core/hub.c
+@@ -938,13 +938,17 @@ int usb_remove_device(struct usb_device *udev)
+ {
+ 	struct usb_hub *hub;
+ 	struct usb_interface *intf;
++	int ret;
+ 
+ 	if (!udev->parent)	/* Can't remove a root hub */
+ 		return -EINVAL;
+ 	hub = usb_hub_to_struct_hub(udev->parent);
+ 	intf = to_usb_interface(hub->intfdev);
+ 
+-	usb_autopm_get_interface(intf);
++	ret = usb_autopm_get_interface(intf);
++	if (ret < 0)
++		return ret;
++
+ 	set_bit(udev->portnum, hub->removed_bits);
+ 	hub_port_logical_disconnect(hub, udev->portnum);
+ 	usb_autopm_put_interface(intf);
+diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
+index 5487fe308f01..1235e678184b 100644
+--- a/drivers/usb/core/port.c
++++ b/drivers/usb/core/port.c
+@@ -98,7 +98,10 @@ static int usb_port_runtime_resume(struct device *dev)
+ 	if (!port_dev->is_superspeed && peer)
+ 		pm_runtime_get_sync(&peer->dev);
+ 
+-	usb_autopm_get_interface(intf);
++	retval = usb_autopm_get_interface(intf);
++	if (retval < 0)
++		return retval;
++
+ 	retval = usb_hub_set_port_power(hdev, hub, port1, true);
+ 	msleep(hub_power_on_good_delay(hub));
+ 	if (udev && !retval) {
+@@ -151,7 +154,10 @@ static int usb_port_runtime_suspend(struct device *dev)
+ 	if (usb_port_block_power_off)
+ 		return -EBUSY;
+ 
+-	usb_autopm_get_interface(intf);
++	retval = usb_autopm_get_interface(intf);
++	if (retval < 0)
++		return retval;
++
+ 	retval = usb_hub_set_port_power(hdev, hub, port1, false);
+ 	usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION);
+ 	if (!port_dev->is_superspeed)
+diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
+index ad8307140df8..64c03e871f2d 100644
+--- a/drivers/usb/core/quirks.c
++++ b/drivers/usb/core/quirks.c
+@@ -86,6 +86,9 @@ static const struct usb_device_id usb_quirk_list[] = {
+ 	/* Logitech PTZ Pro Camera */
+ 	{ USB_DEVICE(0x046d, 0x0853), .driver_info = USB_QUIRK_DELAY_INIT },
+ 
++	/* Logitech Screen Share */
++	{ USB_DEVICE(0x046d, 0x086c), .driver_info = USB_QUIRK_NO_LPM },
++
+ 	/* Logitech Quickcam Fusion */
+ 	{ USB_DEVICE(0x046d, 0x08c1), .driver_info = USB_QUIRK_RESET_RESUME },
+ 
+diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
+index 4cb1355271ec..9536c409a90d 100644
+--- a/drivers/usb/gadget/function/f_fs.c
++++ b/drivers/usb/gadget/function/f_fs.c
+@@ -888,18 +888,19 @@ static int ffs_aio_cancel(struct kiocb *kiocb)
+ {
+ 	struct ffs_io_data *io_data = kiocb->private;
+ 	struct ffs_epfile *epfile = kiocb->ki_filp->private_data;
++	unsigned long flags;
+ 	int value;
+ 
+ 	ENTER();
+ 
+-	spin_lock_irq(&epfile->ffs->eps_lock);
++	spin_lock_irqsave(&epfile->ffs->eps_lock, flags);
+ 
+ 	if (likely(io_data && io_data->ep && io_data->req))
+ 		value = usb_ep_dequeue(io_data->ep, io_data->req);
+ 	else
+ 		value = -EINVAL;
+ 
+-	spin_unlock_irq(&epfile->ffs->eps_lock);
++	spin_unlock_irqrestore(&epfile->ffs->eps_lock, flags);
+ 
+ 	return value;
+ }
+diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
+index 31e08bb3cb41..58a699cfa458 100644
+--- a/drivers/usb/gadget/function/u_serial.c
++++ b/drivers/usb/gadget/function/u_serial.c
+@@ -701,8 +701,10 @@ static int gs_start_io(struct gs_port *port)
+ 	port->n_read = 0;
+ 	started = gs_start_rx(port);
+ 
+-	/* unblock any pending writes into our circular buffer */
+ 	if (started) {
++		gs_start_tx(port);
++		/* Unblock any pending writes into our circular buffer, in case
++		 * we didn't in gs_start_tx() */
+ 		tty_wakeup(port->port.tty);
+ 	} else {
+ 		gs_free_requests(ep, head, &port->read_allocated);
+diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
+index a98259e136dd..2e0a8088ffe2 100644
+--- a/drivers/usb/storage/unusual_devs.h
++++ b/drivers/usb/storage/unusual_devs.h
+@@ -1206,6 +1206,12 @@ UNUSUAL_DEV( 0x090a, 0x1200, 0x0000, 0x9999,
+ 		USB_SC_RBC, USB_PR_BULK, NULL,
+ 		0 ),
+ 
++UNUSUAL_DEV(0x090c, 0x1000, 0x1100, 0x1100,
++		"Samsung",
++		"Flash Drive FIT",
++		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
++		US_FL_MAX_SECTORS_64),
++
+ /* aeb */
+ UNUSUAL_DEV( 0x090c, 0x1132, 0x0000, 0xffff,
+ 		"Feiya",
+diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
+index 598ec7545e84..e5231dd55e6e 100644
+--- a/drivers/video/console/vgacon.c
++++ b/drivers/video/console/vgacon.c
+@@ -1330,6 +1330,9 @@ static int vgacon_font_get(struct vc_data *c, struct console_font *font)
+ static int vgacon_resize(struct vc_data *c, unsigned int width,
+ 			 unsigned int height, unsigned int user)
+ {
++	if ((width << 1) * height > vga_vram_size)
++		return -EINVAL;
++
+ 	if (width % 2 || width > screen_info.orig_video_cols ||
+ 	    height > (screen_info.orig_video_lines * vga_default_font_height)/
+ 	    c->vc_font.height)
+diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c
+index 7386111220d5..daeb645fcea8 100644
+--- a/drivers/watchdog/da9062_wdt.c
++++ b/drivers/watchdog/da9062_wdt.c
+@@ -126,13 +126,6 @@ static int da9062_wdt_stop(struct watchdog_device *wdd)
+ 	struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd);
+ 	int ret;
+ 
+-	ret = da9062_reset_watchdog_timer(wdt);
+-	if (ret) {
+-		dev_err(wdt->hw->dev, "Failed to ping the watchdog (err = %d)\n",
+-			ret);
+-		return ret;
+-	}
+-
+ 	ret = regmap_update_bits(wdt->hw->regmap,
+ 				 DA9062AA_CONTROL_D,
+ 				 DA9062AA_TWDSCALE_MASK,
+diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
+index 3f93125916bf..f5b87a8f75c4 100644
+--- a/fs/cifs/cifsacl.c
++++ b/fs/cifs/cifsacl.c
+@@ -480,7 +480,7 @@ static void access_flags_to_mode(__le32 ace_flags, int type, umode_t *pmode,
+ 			((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS))
+ 		*pmode |= (S_IXUGO & (*pbits_to_set));
+ 
+-	cifs_dbg(NOISY, "access flags 0x%x mode now 0x%x\n", flags, *pmode);
++	cifs_dbg(NOISY, "access flags 0x%x mode now %04o\n", flags, *pmode);
+ 	return;
+ }
+ 
+@@ -509,7 +509,7 @@ static void mode_to_access_flags(umode_t mode, umode_t bits_to_use,
+ 	if (mode & S_IXUGO)
+ 		*pace_flags |= SET_FILE_EXEC_RIGHTS;
+ 
+-	cifs_dbg(NOISY, "mode: 0x%x, access flags now 0x%x\n",
++	cifs_dbg(NOISY, "mode: %04o, access flags now 0x%x\n",
+ 		 mode, *pace_flags);
+ 	return;
+ }
+diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
+index 4bde8acca455..cf104bbe30a1 100644
+--- a/fs/cifs/connect.c
++++ b/fs/cifs/connect.c
+@@ -3402,7 +3402,7 @@ void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
+ 	cifs_sb->mnt_gid = pvolume_info->linux_gid;
+ 	cifs_sb->mnt_file_mode = pvolume_info->file_mode;
+ 	cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
+-	cifs_dbg(FYI, "file mode: 0x%hx  dir mode: 0x%hx\n",
++	cifs_dbg(FYI, "file mode: %04ho  dir mode: %04ho\n",
+ 		 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
+ 
+ 	cifs_sb->actimeo = pvolume_info->actimeo;
+diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
+index 0a219545940d..c18c26a78453 100644
+--- a/fs/cifs/inode.c
++++ b/fs/cifs/inode.c
+@@ -1540,7 +1540,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
+ 	struct TCP_Server_Info *server;
+ 	char *full_path;
+ 
+-	cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n",
++	cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
+ 		 mode, inode);
+ 
+ 	cifs_sb = CIFS_SB(inode->i_sb);
+@@ -1957,6 +1957,7 @@ int cifs_revalidate_dentry_attr(struct dentry *dentry)
+ 	struct inode *inode = d_inode(dentry);
+ 	struct super_block *sb = dentry->d_sb;
+ 	char *full_path = NULL;
++	int count = 0;
+ 
+ 	if (inode == NULL)
+ 		return -ENOENT;
+@@ -1978,15 +1979,18 @@ int cifs_revalidate_dentry_attr(struct dentry *dentry)
+ 		 full_path, inode, inode->i_count.counter,
+ 		 dentry, dentry->d_time, jiffies);
+ 
++again:
+ 	if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
+ 		rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
+ 	else
+ 		rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
+ 					 xid, NULL);
+-
++	if (rc == -EAGAIN && count++ < 10)
++		goto again;
+ out:
+ 	kfree(full_path);
+ 	free_xid(xid);
++
+ 	return rc;
+ }
+ 
+diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
+index b272b778aa85..37920394c64c 100644
+--- a/fs/ecryptfs/keystore.c
++++ b/fs/ecryptfs/keystore.c
+@@ -1280,7 +1280,7 @@ parse_tag_1_packet(struct ecryptfs_crypt_stat *crypt_stat,
+ 		printk(KERN_ERR "Enter w/ first byte != 0x%.2x\n",
+ 		       ECRYPTFS_TAG_1_PACKET_TYPE);
+ 		rc = -EINVAL;
+-		goto out_free;
++		goto out;
+ 	}
+ 	/* Released: wipe_auth_tok_list called in ecryptfs_parse_packet_set or
+ 	 * at end of function upon failure */
+@@ -1330,7 +1330,7 @@ parse_tag_1_packet(struct ecryptfs_crypt_stat *crypt_stat,
+ 		printk(KERN_WARNING "Tag 1 packet contains key larger "
+ 		       "than ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES");
+ 		rc = -EINVAL;
+-		goto out;
++		goto out_free;
+ 	}
+ 	memcpy((*new_auth_tok)->session_key.encrypted_key,
+ 	       &data[(*packet_size)], (body_size - (ECRYPTFS_SIG_SIZE + 2)));
+diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
+index e0fb7cdcee89..b041a215cd73 100644
+--- a/fs/ext4/balloc.c
++++ b/fs/ext4/balloc.c
+@@ -279,6 +279,7 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
+ 	ext4_group_t ngroups = ext4_get_groups_count(sb);
+ 	struct ext4_group_desc *desc;
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
++	struct buffer_head *bh_p;
+ 
+ 	if (block_group >= ngroups) {
+ 		ext4_error(sb, "block_group >= groups_count - block_group = %u,"
+@@ -289,7 +290,14 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
+ 
+ 	group_desc = block_group >> EXT4_DESC_PER_BLOCK_BITS(sb);
+ 	offset = block_group & (EXT4_DESC_PER_BLOCK(sb) - 1);
+-	if (!sbi->s_group_desc[group_desc]) {
++	bh_p = sbi_array_rcu_deref(sbi, s_group_desc, group_desc);
++	/*
++	 * sbi_array_rcu_deref returns with rcu unlocked, this is ok since
++	 * the pointer being dereferenced won't be dereferenced again. By
++	 * looking at the usage in add_new_gdb() the value isn't modified,
++	 * just the pointer, and so it remains valid.
++	 */
++	if (!bh_p) {
+ 		ext4_error(sb, "Group descriptor not loaded - "
+ 			   "block_group = %u, group_desc = %u, desc = %u",
+ 			   block_group, group_desc, offset);
+@@ -297,10 +305,10 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
+ 	}
+ 
+ 	desc = (struct ext4_group_desc *)(
+-		(__u8 *)sbi->s_group_desc[group_desc]->b_data +
++		(__u8 *)bh_p->b_data +
+ 		offset * EXT4_DESC_SIZE(sb));
+ 	if (bh)
+-		*bh = sbi->s_group_desc[group_desc];
++		*bh = bh_p;
+ 	return desc;
+ }
+ 
+diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
+index 00ab96311487..ab0f08c89d5f 100644
+--- a/fs/ext4/ext4.h
++++ b/fs/ext4/ext4.h
+@@ -1303,7 +1303,7 @@ struct ext4_sb_info {
+ 	loff_t s_bitmap_maxbytes;	/* max bytes for bitmap files */
+ 	struct buffer_head * s_sbh;	/* Buffer containing the super block */
+ 	struct ext4_super_block *s_es;	/* Pointer to the super block in the buffer */
+-	struct buffer_head **s_group_desc;
++	struct buffer_head * __rcu *s_group_desc;
+ 	unsigned int s_mount_opt;
+ 	unsigned int s_mount_opt2;
+ 	unsigned int s_mount_flags;
+@@ -1363,7 +1363,7 @@ struct ext4_sb_info {
+ #endif
+ 
+ 	/* for buddy allocator */
+-	struct ext4_group_info ***s_group_info;
++	struct ext4_group_info ** __rcu *s_group_info;
+ 	struct inode *s_buddy_cache;
+ 	spinlock_t s_md_lock;
+ 	unsigned short *s_mb_offsets;
+@@ -1410,7 +1410,7 @@ struct ext4_sb_info {
+ 	unsigned int s_extent_max_zeroout_kb;
+ 
+ 	unsigned int s_log_groups_per_flex;
+-	struct flex_groups *s_flex_groups;
++	struct flex_groups * __rcu *s_flex_groups;
+ 	ext4_group_t s_flex_groups_allocated;
+ 
+ 	/* workqueue for reserved extent conversions (buffered io) */
+@@ -1491,6 +1491,23 @@ static inline void ext4_inode_aio_set(struct inode *inode, ext4_io_end_t *io)
+ 	inode->i_private = io;
+ }
+ 
++/*
++ * Returns: sbi->field[index]
++ * Used to access an array element from the following sbi fields which require
++ * rcu protection to avoid dereferencing an invalid pointer due to reassignment
++ * - s_group_desc
++ * - s_group_info
++ * - s_flex_group
++ */
++#define sbi_array_rcu_deref(sbi, field, index)				   \
++({									   \
++	typeof(*((sbi)->field)) _v;					   \
++	rcu_read_lock();						   \
++	_v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index];	   \
++	rcu_read_unlock();						   \
++	_v;								   \
++})
++
+ /*
+  * Inode dynamic state flags
+  */
+@@ -2555,6 +2572,7 @@ extern int ext4_generic_delete_entry(handle_t *handle,
+ extern int ext4_empty_dir(struct inode *inode);
+ 
+ /* resize.c */
++extern void ext4_kvfree_array_rcu(void *to_free);
+ extern int ext4_group_add(struct super_block *sb,
+ 				struct ext4_new_group_data *input);
+ extern int ext4_group_extend(struct super_block *sb,
+@@ -2795,13 +2813,13 @@ static inline
+ struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
+ 					    ext4_group_t group)
+ {
+-	 struct ext4_group_info ***grp_info;
++	 struct ext4_group_info **grp_info;
+ 	 long indexv, indexh;
+ 	 BUG_ON(group >= EXT4_SB(sb)->s_groups_count);
+-	 grp_info = EXT4_SB(sb)->s_group_info;
+ 	 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
+ 	 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
+-	 return grp_info[indexv][indexh];
++	 grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv);
++	 return grp_info[indexh];
+ }
+ 
+ /*
+diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
+index 0963213e9cd3..c31b05f0bd69 100644
+--- a/fs/ext4/ialloc.c
++++ b/fs/ext4/ialloc.c
+@@ -331,11 +331,13 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
+ 
+ 	percpu_counter_inc(&sbi->s_freeinodes_counter);
+ 	if (sbi->s_log_groups_per_flex) {
+-		ext4_group_t f = ext4_flex_group(sbi, block_group);
++		struct flex_groups *fg;
+ 
+-		atomic_inc(&sbi->s_flex_groups[f].free_inodes);
++		fg = sbi_array_rcu_deref(sbi, s_flex_groups,
++					 ext4_flex_group(sbi, block_group));
++		atomic_inc(&fg->free_inodes);
+ 		if (is_directory)
+-			atomic_dec(&sbi->s_flex_groups[f].used_dirs);
++			atomic_dec(&fg->used_dirs);
+ 	}
+ 	BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata");
+ 	fatal = ext4_handle_dirty_metadata(handle, NULL, bh2);
+@@ -376,12 +378,13 @@ static void get_orlov_stats(struct super_block *sb, ext4_group_t g,
+ 			    int flex_size, struct orlov_stats *stats)
+ {
+ 	struct ext4_group_desc *desc;
+-	struct flex_groups *flex_group = EXT4_SB(sb)->s_flex_groups;
+ 
+ 	if (flex_size > 1) {
+-		stats->free_inodes = atomic_read(&flex_group[g].free_inodes);
+-		stats->free_clusters = atomic64_read(&flex_group[g].free_clusters);
+-		stats->used_dirs = atomic_read(&flex_group[g].used_dirs);
++		struct flex_groups *fg = sbi_array_rcu_deref(EXT4_SB(sb),
++							     s_flex_groups, g);
++		stats->free_inodes = atomic_read(&fg->free_inodes);
++		stats->free_clusters = atomic64_read(&fg->free_clusters);
++		stats->used_dirs = atomic_read(&fg->used_dirs);
+ 		return;
+ 	}
+ 
+@@ -981,7 +984,8 @@ got:
+ 		if (sbi->s_log_groups_per_flex) {
+ 			ext4_group_t f = ext4_flex_group(sbi, group);
+ 
+-			atomic_inc(&sbi->s_flex_groups[f].used_dirs);
++			atomic_inc(&sbi_array_rcu_deref(sbi, s_flex_groups,
++							f)->used_dirs);
+ 		}
+ 	}
+ 	if (ext4_has_group_desc_csum(sb)) {
+@@ -1004,7 +1008,8 @@ got:
+ 
+ 	if (sbi->s_log_groups_per_flex) {
+ 		flex_group = ext4_flex_group(sbi, group);
+-		atomic_dec(&sbi->s_flex_groups[flex_group].free_inodes);
++		atomic_dec(&sbi_array_rcu_deref(sbi, s_flex_groups,
++						flex_group)->free_inodes);
+ 	}
+ 
+ 	inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb);
+diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
+index 828b4c080c38..fda49f4c5a8e 100644
+--- a/fs/ext4/mballoc.c
++++ b/fs/ext4/mballoc.c
+@@ -2378,7 +2378,7 @@ int ext4_mb_alloc_groupinfo(struct super_block *sb, ext4_group_t ngroups)
+ {
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+ 	unsigned size;
+-	struct ext4_group_info ***new_groupinfo;
++	struct ext4_group_info ***old_groupinfo, ***new_groupinfo;
+ 
+ 	size = (ngroups + EXT4_DESC_PER_BLOCK(sb) - 1) >>
+ 		EXT4_DESC_PER_BLOCK_BITS(sb);
+@@ -2391,13 +2391,16 @@ int ext4_mb_alloc_groupinfo(struct super_block *sb, ext4_group_t ngroups)
+ 		ext4_msg(sb, KERN_ERR, "can't allocate buddy meta group");
+ 		return -ENOMEM;
+ 	}
+-	if (sbi->s_group_info) {
+-		memcpy(new_groupinfo, sbi->s_group_info,
++	rcu_read_lock();
++	old_groupinfo = rcu_dereference(sbi->s_group_info);
++	if (old_groupinfo)
++		memcpy(new_groupinfo, old_groupinfo,
+ 		       sbi->s_group_info_size * sizeof(*sbi->s_group_info));
+-		kvfree(sbi->s_group_info);
+-	}
+-	sbi->s_group_info = new_groupinfo;
++	rcu_read_unlock();
++	rcu_assign_pointer(sbi->s_group_info, new_groupinfo);
+ 	sbi->s_group_info_size = size / sizeof(*sbi->s_group_info);
++	if (old_groupinfo)
++		ext4_kvfree_array_rcu(old_groupinfo);
+ 	ext4_debug("allocated s_groupinfo array for %d meta_bg's\n", 
+ 		   sbi->s_group_info_size);
+ 	return 0;
+@@ -2409,6 +2412,7 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
+ {
+ 	int i;
+ 	int metalen = 0;
++	int idx = group >> EXT4_DESC_PER_BLOCK_BITS(sb);
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+ 	struct ext4_group_info **meta_group_info;
+ 	struct kmem_cache *cachep = get_groupinfo_cache(sb->s_blocksize_bits);
+@@ -2427,12 +2431,12 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
+ 				 "for a buddy group");
+ 			goto exit_meta_group_info;
+ 		}
+-		sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)] =
+-			meta_group_info;
++		rcu_read_lock();
++		rcu_dereference(sbi->s_group_info)[idx] = meta_group_info;
++		rcu_read_unlock();
+ 	}
+ 
+-	meta_group_info =
+-		sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)];
++	meta_group_info = sbi_array_rcu_deref(sbi, s_group_info, idx);
+ 	i = group & (EXT4_DESC_PER_BLOCK(sb) - 1);
+ 
+ 	meta_group_info[i] = kmem_cache_zalloc(cachep, GFP_NOFS);
+@@ -2480,8 +2484,13 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
+ exit_group_info:
+ 	/* If a meta_group_info table has been allocated, release it now */
+ 	if (group % EXT4_DESC_PER_BLOCK(sb) == 0) {
+-		kfree(sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)]);
+-		sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)] = NULL;
++		struct ext4_group_info ***group_info;
++
++		rcu_read_lock();
++		group_info = rcu_dereference(sbi->s_group_info);
++		kfree(group_info[idx]);
++		group_info[idx] = NULL;
++		rcu_read_unlock();
+ 	}
+ exit_meta_group_info:
+ 	return -ENOMEM;
+@@ -2494,6 +2503,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+ 	int err;
+ 	struct ext4_group_desc *desc;
++	struct ext4_group_info ***group_info;
+ 	struct kmem_cache *cachep;
+ 
+ 	err = ext4_mb_alloc_groupinfo(sb, ngroups);
+@@ -2528,11 +2538,16 @@ err_freebuddy:
+ 	while (i-- > 0)
+ 		kmem_cache_free(cachep, ext4_get_group_info(sb, i));
+ 	i = sbi->s_group_info_size;
++	rcu_read_lock();
++	group_info = rcu_dereference(sbi->s_group_info);
+ 	while (i-- > 0)
+-		kfree(sbi->s_group_info[i]);
++		kfree(group_info[i]);
++	rcu_read_unlock();
+ 	iput(sbi->s_buddy_cache);
+ err_freesgi:
+-	kvfree(sbi->s_group_info);
++	rcu_read_lock();
++	kvfree(rcu_dereference(sbi->s_group_info));
++	rcu_read_unlock();
+ 	return -ENOMEM;
+ }
+ 
+@@ -2720,7 +2735,7 @@ int ext4_mb_release(struct super_block *sb)
+ 	ext4_group_t ngroups = ext4_get_groups_count(sb);
+ 	ext4_group_t i;
+ 	int num_meta_group_infos;
+-	struct ext4_group_info *grinfo;
++	struct ext4_group_info *grinfo, ***group_info;
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+ 	struct kmem_cache *cachep = get_groupinfo_cache(sb->s_blocksize_bits);
+ 
+@@ -2738,9 +2753,12 @@ int ext4_mb_release(struct super_block *sb)
+ 		num_meta_group_infos = (ngroups +
+ 				EXT4_DESC_PER_BLOCK(sb) - 1) >>
+ 			EXT4_DESC_PER_BLOCK_BITS(sb);
++		rcu_read_lock();
++		group_info = rcu_dereference(sbi->s_group_info);
+ 		for (i = 0; i < num_meta_group_infos; i++)
+-			kfree(sbi->s_group_info[i]);
+-		kvfree(sbi->s_group_info);
++			kfree(group_info[i]);
++		kvfree(group_info);
++		rcu_read_unlock();
+ 	}
+ 	kfree(sbi->s_mb_offsets);
+ 	kfree(sbi->s_mb_maxs);
+@@ -2995,7 +3013,8 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
+ 		ext4_group_t flex_group = ext4_flex_group(sbi,
+ 							  ac->ac_b_ex.fe_group);
+ 		atomic64_sub(ac->ac_b_ex.fe_len,
+-			     &sbi->s_flex_groups[flex_group].free_clusters);
++			     &sbi_array_rcu_deref(sbi, s_flex_groups,
++						  flex_group)->free_clusters);
+ 	}
+ 
+ 	err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
+@@ -4887,7 +4906,8 @@ do_more:
+ 	if (sbi->s_log_groups_per_flex) {
+ 		ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
+ 		atomic64_add(count_clusters,
+-			     &sbi->s_flex_groups[flex_group].free_clusters);
++			     &sbi_array_rcu_deref(sbi, s_flex_groups,
++						  flex_group)->free_clusters);
+ 	}
+ 
+ 	if (!(flags & EXT4_FREE_BLOCKS_NO_QUOT_UPDATE))
+@@ -5032,7 +5052,8 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
+ 	if (sbi->s_log_groups_per_flex) {
+ 		ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
+ 		atomic64_add(EXT4_NUM_B2C(sbi, blocks_freed),
+-			     &sbi->s_flex_groups[flex_group].free_clusters);
++			     &sbi_array_rcu_deref(sbi, s_flex_groups,
++						  flex_group)->free_clusters);
+ 	}
+ 
+ 	ext4_mb_unload_buddy(&e4b);
+diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
+index 5223eb25bf59..f5b6667b0ab0 100644
+--- a/fs/ext4/resize.c
++++ b/fs/ext4/resize.c
+@@ -16,6 +16,33 @@
+ 
+ #include "ext4_jbd2.h"
+ 
++struct ext4_rcu_ptr {
++	struct rcu_head rcu;
++	void *ptr;
++};
++
++static void ext4_rcu_ptr_callback(struct rcu_head *head)
++{
++	struct ext4_rcu_ptr *ptr;
++
++	ptr = container_of(head, struct ext4_rcu_ptr, rcu);
++	kvfree(ptr->ptr);
++	kfree(ptr);
++}
++
++void ext4_kvfree_array_rcu(void *to_free)
++{
++	struct ext4_rcu_ptr *ptr = kzalloc(sizeof(*ptr), GFP_KERNEL);
++
++	if (ptr) {
++		ptr->ptr = to_free;
++		call_rcu(&ptr->rcu, ext4_rcu_ptr_callback);
++		return;
++	}
++	synchronize_rcu();
++	kvfree(to_free);
++}
++
+ int ext4_resize_begin(struct super_block *sb)
+ {
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+@@ -541,8 +568,8 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
+ 				brelse(gdb);
+ 				goto out;
+ 			}
+-			memcpy(gdb->b_data, sbi->s_group_desc[j]->b_data,
+-			       gdb->b_size);
++			memcpy(gdb->b_data, sbi_array_rcu_deref(sbi,
++				s_group_desc, j)->b_data, gdb->b_size);
+ 			set_buffer_uptodate(gdb);
+ 
+ 			err = ext4_handle_dirty_metadata(handle, NULL, gdb);
+@@ -849,13 +876,15 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
+ 	}
+ 	brelse(dind);
+ 
+-	o_group_desc = EXT4_SB(sb)->s_group_desc;
++	rcu_read_lock();
++	o_group_desc = rcu_dereference(EXT4_SB(sb)->s_group_desc);
+ 	memcpy(n_group_desc, o_group_desc,
+ 	       EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
++	rcu_read_unlock();
+ 	n_group_desc[gdb_num] = gdb_bh;
+-	EXT4_SB(sb)->s_group_desc = n_group_desc;
++	rcu_assign_pointer(EXT4_SB(sb)->s_group_desc, n_group_desc);
+ 	EXT4_SB(sb)->s_gdb_count++;
+-	kvfree(o_group_desc);
++	ext4_kvfree_array_rcu(o_group_desc);
+ 
+ 	le16_add_cpu(&es->s_reserved_gdt_blocks, -1);
+ 	err = ext4_handle_dirty_super(handle, sb);
+@@ -903,9 +932,11 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
+ 		return err;
+ 	}
+ 
+-	o_group_desc = EXT4_SB(sb)->s_group_desc;
++	rcu_read_lock();
++	o_group_desc = rcu_dereference(EXT4_SB(sb)->s_group_desc);
+ 	memcpy(n_group_desc, o_group_desc,
+ 	       EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
++	rcu_read_unlock();
+ 	n_group_desc[gdb_num] = gdb_bh;
+ 
+ 	BUFFER_TRACE(gdb_bh, "get_write_access");
+@@ -916,9 +947,9 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
+ 		return err;
+ 	}
+ 
+-	EXT4_SB(sb)->s_group_desc = n_group_desc;
++	rcu_assign_pointer(EXT4_SB(sb)->s_group_desc, n_group_desc);
+ 	EXT4_SB(sb)->s_gdb_count++;
+-	kvfree(o_group_desc);
++	ext4_kvfree_array_rcu(o_group_desc);
+ 	return err;
+ }
+ 
+@@ -1180,7 +1211,8 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
+ 		 * use non-sparse filesystems anymore.  This is already checked above.
+ 		 */
+ 		if (gdb_off) {
+-			gdb_bh = sbi->s_group_desc[gdb_num];
++			gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc,
++						     gdb_num);
+ 			BUFFER_TRACE(gdb_bh, "get_write_access");
+ 			err = ext4_journal_get_write_access(handle, gdb_bh);
+ 
+@@ -1262,7 +1294,7 @@ static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
+ 		/*
+ 		 * get_write_access() has been called on gdb_bh by ext4_add_new_desc().
+ 		 */
+-		gdb_bh = sbi->s_group_desc[gdb_num];
++		gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc, gdb_num);
+ 		/* Update group descriptor block for new group */
+ 		gdp = (struct ext4_group_desc *)(gdb_bh->b_data +
+ 						 gdb_off * EXT4_DESC_SIZE(sb));
+@@ -1390,11 +1422,14 @@ static void ext4_update_super(struct super_block *sb,
+ 		   percpu_counter_read(&sbi->s_freeclusters_counter));
+ 	if (ext4_has_feature_flex_bg(sb) && sbi->s_log_groups_per_flex) {
+ 		ext4_group_t flex_group;
++		struct flex_groups *fg;
++
+ 		flex_group = ext4_flex_group(sbi, group_data[0].group);
++		fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group);
+ 		atomic64_add(EXT4_NUM_B2C(sbi, free_blocks),
+-			     &sbi->s_flex_groups[flex_group].free_clusters);
++			     &fg->free_clusters);
+ 		atomic_add(EXT4_INODES_PER_GROUP(sb) * flex_gd->count,
+-			   &sbi->s_flex_groups[flex_group].free_inodes);
++			   &fg->free_inodes);
+ 	}
+ 
+ 	/*
+@@ -1489,7 +1524,8 @@ exit_journal:
+ 		for (; gdb_num <= gdb_num_end; gdb_num++) {
+ 			struct buffer_head *gdb_bh;
+ 
+-			gdb_bh = sbi->s_group_desc[gdb_num];
++			gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc,
++						     gdb_num);
+ 			if (old_gdb == gdb_bh->b_blocknr)
+ 				continue;
+ 			update_backups(sb, gdb_bh->b_blocknr, gdb_bh->b_data,
+diff --git a/fs/ext4/super.c b/fs/ext4/super.c
+index adf02b1509ca..f2e0220b00c3 100644
+--- a/fs/ext4/super.c
++++ b/fs/ext4/super.c
+@@ -794,6 +794,8 @@ static void ext4_put_super(struct super_block *sb)
+ {
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+ 	struct ext4_super_block *es = sbi->s_es;
++	struct buffer_head **group_desc;
++	struct flex_groups **flex_groups;
+ 	int aborted = 0;
+ 	int i, err;
+ 
+@@ -826,10 +828,18 @@ static void ext4_put_super(struct super_block *sb)
+ 	if (!(sb->s_flags & MS_RDONLY))
+ 		ext4_commit_super(sb, 1);
+ 
++	rcu_read_lock();
++	group_desc = rcu_dereference(sbi->s_group_desc);
+ 	for (i = 0; i < sbi->s_gdb_count; i++)
+-		brelse(sbi->s_group_desc[i]);
+-	kvfree(sbi->s_group_desc);
+-	kvfree(sbi->s_flex_groups);
++		brelse(group_desc[i]);
++	kvfree(group_desc);
++	flex_groups = rcu_dereference(sbi->s_flex_groups);
++	if (flex_groups) {
++		for (i = 0; i < sbi->s_flex_groups_allocated; i++)
++			kvfree(flex_groups[i]);
++		kvfree(flex_groups);
++	}
++	rcu_read_unlock();
+ 	percpu_counter_destroy(&sbi->s_freeclusters_counter);
+ 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
+ 	percpu_counter_destroy(&sbi->s_dirs_counter);
+@@ -1978,8 +1988,8 @@ done:
+ int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup)
+ {
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+-	struct flex_groups *new_groups;
+-	int size;
++	struct flex_groups **old_groups, **new_groups;
++	int size, i, j;
+ 
+ 	if (!sbi->s_log_groups_per_flex)
+ 		return 0;
+@@ -1988,22 +1998,37 @@ int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup)
+ 	if (size <= sbi->s_flex_groups_allocated)
+ 		return 0;
+ 
+-	size = roundup_pow_of_two(size * sizeof(struct flex_groups));
+-	new_groups = ext4_kvzalloc(size, GFP_KERNEL);
++	new_groups = ext4_kvzalloc(roundup_pow_of_two(size *
++				   sizeof(*sbi->s_flex_groups)), GFP_KERNEL);
+ 	if (!new_groups) {
+-		ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups",
+-			 size / (int) sizeof(struct flex_groups));
++		ext4_msg(sb, KERN_ERR,
++			 "not enough memory for %d flex group pointers", size);
+ 		return -ENOMEM;
+ 	}
+-
+-	if (sbi->s_flex_groups) {
+-		memcpy(new_groups, sbi->s_flex_groups,
+-		       (sbi->s_flex_groups_allocated *
+-			sizeof(struct flex_groups)));
+-		kvfree(sbi->s_flex_groups);
++	for (i = sbi->s_flex_groups_allocated; i < size; i++) {
++		new_groups[i] = ext4_kvzalloc(roundup_pow_of_two(
++					      sizeof(struct flex_groups)),
++					      GFP_KERNEL);
++		if (!new_groups[i]) {
++			for (j = sbi->s_flex_groups_allocated; j < i; j++)
++				kvfree(new_groups[j]);
++			kvfree(new_groups);
++			ext4_msg(sb, KERN_ERR,
++				 "not enough memory for %d flex groups", size);
++			return -ENOMEM;
++		}
+ 	}
+-	sbi->s_flex_groups = new_groups;
+-	sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups);
++	rcu_read_lock();
++	old_groups = rcu_dereference(sbi->s_flex_groups);
++	if (old_groups)
++		memcpy(new_groups, old_groups,
++		       (sbi->s_flex_groups_allocated *
++			sizeof(struct flex_groups *)));
++	rcu_read_unlock();
++	rcu_assign_pointer(sbi->s_flex_groups, new_groups);
++	sbi->s_flex_groups_allocated = size;
++	if (old_groups)
++		ext4_kvfree_array_rcu(old_groups);
+ 	return 0;
+ }
+ 
+@@ -2011,6 +2036,7 @@ static int ext4_fill_flex_info(struct super_block *sb)
+ {
+ 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+ 	struct ext4_group_desc *gdp = NULL;
++	struct flex_groups *fg;
+ 	ext4_group_t flex_group;
+ 	int i, err;
+ 
+@@ -2028,12 +2054,11 @@ static int ext4_fill_flex_info(struct super_block *sb)
+ 		gdp = ext4_get_group_desc(sb, i, NULL);
+ 
+ 		flex_group = ext4_flex_group(sbi, i);
+-		atomic_add(ext4_free_inodes_count(sb, gdp),
+-			   &sbi->s_flex_groups[flex_group].free_inodes);
++		fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group);
++		atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes);
+ 		atomic64_add(ext4_free_group_clusters(sb, gdp),
+-			     &sbi->s_flex_groups[flex_group].free_clusters);
+-		atomic_add(ext4_used_dirs_count(sb, gdp),
+-			   &sbi->s_flex_groups[flex_group].used_dirs);
++			     &fg->free_clusters);
++		atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs);
+ 	}
+ 
+ 	return 1;
+@@ -3236,9 +3261,10 @@ static void ext4_set_resv_clusters(struct super_block *sb)
+ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
+ {
+ 	char *orig_data = kstrdup(data, GFP_KERNEL);
+-	struct buffer_head *bh;
++	struct buffer_head *bh, **group_desc;
+ 	struct ext4_super_block *es = NULL;
+ 	struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
++	struct flex_groups **flex_groups;
+ 	ext4_fsblk_t block;
+ 	ext4_fsblk_t sb_block = get_sb_block(&data);
+ 	ext4_fsblk_t logical_sb_block;
+@@ -3795,9 +3821,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
+ 			goto failed_mount;
+ 		}
+ 	}
+-	sbi->s_group_desc = ext4_kvmalloc(db_count *
++	rcu_assign_pointer(sbi->s_group_desc,
++			   ext4_kvmalloc(db_count *
+ 					  sizeof(struct buffer_head *),
+-					  GFP_KERNEL);
++					  GFP_KERNEL));
+ 	if (sbi->s_group_desc == NULL) {
+ 		ext4_msg(sb, KERN_ERR, "not enough memory");
+ 		ret = -ENOMEM;
+@@ -3807,14 +3834,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
+ 	bgl_lock_init(sbi->s_blockgroup_lock);
+ 
+ 	for (i = 0; i < db_count; i++) {
++		struct buffer_head *bh;
++
+ 		block = descriptor_loc(sb, logical_sb_block, i);
+-		sbi->s_group_desc[i] = sb_bread_unmovable(sb, block);
+-		if (!sbi->s_group_desc[i]) {
++		bh = sb_bread_unmovable(sb, block);
++		if (!bh) {
+ 			ext4_msg(sb, KERN_ERR,
+ 			       "can't read group descriptor %d", i);
+ 			db_count = i;
+ 			goto failed_mount2;
+ 		}
++		rcu_read_lock();
++		rcu_dereference(sbi->s_group_desc)[i] = bh;
++		rcu_read_unlock();
+ 	}
+ 	sbi->s_gdb_count = db_count;
+ 	if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
+@@ -4149,8 +4181,14 @@ failed_mount7:
+ 	ext4_unregister_li_request(sb);
+ failed_mount6:
+ 	ext4_mb_release(sb);
+-	if (sbi->s_flex_groups)
+-		kvfree(sbi->s_flex_groups);
++	rcu_read_lock();
++	flex_groups = rcu_dereference(sbi->s_flex_groups);
++	if (flex_groups) {
++		for (i = 0; i < sbi->s_flex_groups_allocated; i++)
++			kvfree(flex_groups[i]);
++		kvfree(flex_groups);
++	}
++	rcu_read_unlock();
+ 	percpu_counter_destroy(&sbi->s_freeclusters_counter);
+ 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
+ 	percpu_counter_destroy(&sbi->s_dirs_counter);
+@@ -4177,9 +4215,12 @@ failed_mount3:
+ 	if (sbi->s_mmp_tsk)
+ 		kthread_stop(sbi->s_mmp_tsk);
+ failed_mount2:
++	rcu_read_lock();
++	group_desc = rcu_dereference(sbi->s_group_desc);
+ 	for (i = 0; i < db_count; i++)
+-		brelse(sbi->s_group_desc[i]);
+-	kvfree(sbi->s_group_desc);
++		brelse(group_desc[i]);
++	kvfree(group_desc);
++	rcu_read_unlock();
+ failed_mount:
+ 	if (sbi->s_chksum_driver)
+ 		crypto_free_shash(sbi->s_chksum_driver);
+diff --git a/fs/fat/inode.c b/fs/fat/inode.c
+index c81cfb79a339..5e87b9aa7ba6 100644
+--- a/fs/fat/inode.c
++++ b/fs/fat/inode.c
+@@ -653,6 +653,13 @@ static struct inode *fat_alloc_inode(struct super_block *sb)
+ 		return NULL;
+ 
+ 	init_rwsem(&ei->truncate_lock);
++	/* Zeroing to allow iput() even if partial initialized inode. */
++	ei->mmu_private = 0;
++	ei->i_start = 0;
++	ei->i_logstart = 0;
++	ei->i_attrs = 0;
++	ei->i_pos = 0;
++
+ 	return &ei->vfs_inode;
+ }
+ 
+@@ -1276,16 +1283,6 @@ out:
+ 	return 0;
+ }
+ 
+-static void fat_dummy_inode_init(struct inode *inode)
+-{
+-	/* Initialize this dummy inode to work as no-op. */
+-	MSDOS_I(inode)->mmu_private = 0;
+-	MSDOS_I(inode)->i_start = 0;
+-	MSDOS_I(inode)->i_logstart = 0;
+-	MSDOS_I(inode)->i_attrs = 0;
+-	MSDOS_I(inode)->i_pos = 0;
+-}
+-
+ static int fat_read_root(struct inode *inode)
+ {
+ 	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+@@ -1730,13 +1727,11 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
+ 	fat_inode = new_inode(sb);
+ 	if (!fat_inode)
+ 		goto out_fail;
+-	fat_dummy_inode_init(fat_inode);
+ 	sbi->fat_inode = fat_inode;
+ 
+ 	fsinfo_inode = new_inode(sb);
+ 	if (!fsinfo_inode)
+ 		goto out_fail;
+-	fat_dummy_inode_init(fsinfo_inode);
+ 	fsinfo_inode->i_ino = MSDOS_FSINFO_INO;
+ 	sbi->fsinfo_inode = fsinfo_inode;
+ 	insert_inode_hash(fsinfo_inode);
+diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
+index f5d2d2340b44..16891f5364af 100644
+--- a/fs/fuse/dev.c
++++ b/fs/fuse/dev.c
+@@ -2031,10 +2031,8 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
+ 		rem += pipe->bufs[(pipe->curbuf + idx) & (pipe->buffers - 1)].len;
+ 
+ 	ret = -EINVAL;
+-	if (rem < len) {
+-		pipe_unlock(pipe);
+-		goto out;
+-	}
++	if (rem < len)
++		goto out_free;
+ 
+ 	rem = len;
+ 	while (rem) {
+@@ -2052,7 +2050,9 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
+ 			pipe->curbuf = (pipe->curbuf + 1) & (pipe->buffers - 1);
+ 			pipe->nrbufs--;
+ 		} else {
+-			ibuf->ops->get(pipe, ibuf);
++			if (!pipe_buf_get(pipe, ibuf))
++				goto out_free;
++
+ 			*obuf = *ibuf;
+ 			obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
+ 			obuf->len = rem;
+@@ -2075,13 +2075,13 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
+ 	ret = fuse_dev_do_write(fud, &cs, len);
+ 
+ 	pipe_lock(pipe);
++out_free:
+ 	for (idx = 0; idx < nbuf; idx++) {
+ 		struct pipe_buffer *buf = &bufs[idx];
+ 		buf->ops->release(pipe, buf);
+ 	}
+ 	pipe_unlock(pipe);
+ 
+-out:
+ 	kfree(bufs);
+ 	return ret;
+ }
+diff --git a/fs/namei.c b/fs/namei.c
+index 9f1aae507909..4a2b9371e00e 100644
+--- a/fs/namei.c
++++ b/fs/namei.c
+@@ -1358,7 +1358,7 @@ static int follow_dotdot_rcu(struct nameidata *nd)
+ 			nd->path.dentry = parent;
+ 			nd->seq = seq;
+ 			if (unlikely(!path_connected(&nd->path)))
+-				return -ENOENT;
++				return -ECHILD;
+ 			break;
+ 		} else {
+ 			struct mount *mnt = real_mount(nd->path.mnt);
+diff --git a/fs/pipe.c b/fs/pipe.c
+index 1e7263bb837a..6534470a6c19 100644
+--- a/fs/pipe.c
++++ b/fs/pipe.c
+@@ -178,9 +178,9 @@ EXPORT_SYMBOL(generic_pipe_buf_steal);
+  *	in the tee() system call, when we duplicate the buffers in one
+  *	pipe into another.
+  */
+-void generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
++bool generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
+ {
+-	page_cache_get(buf->page);
++	return try_get_page(buf->page);
+ }
+ EXPORT_SYMBOL(generic_pipe_buf_get);
+ 
+diff --git a/fs/splice.c b/fs/splice.c
+index 8398974e1538..57ccc583a172 100644
+--- a/fs/splice.c
++++ b/fs/splice.c
+@@ -1876,7 +1876,11 @@ retry:
+ 			 * Get a reference to this pipe buffer,
+ 			 * so we can copy the contents over.
+ 			 */
+-			ibuf->ops->get(ipipe, ibuf);
++			if (!pipe_buf_get(ipipe, ibuf)) {
++				if (ret == 0)
++					ret = -EFAULT;
++				break;
++			}
+ 			*obuf = *ibuf;
+ 
+ 			/*
+@@ -1948,7 +1952,11 @@ static int link_pipe(struct pipe_inode_info *ipipe,
+ 		 * Get a reference to this pipe buffer,
+ 		 * so we can copy the contents over.
+ 		 */
+-		ibuf->ops->get(ipipe, ibuf);
++		if (!pipe_buf_get(ipipe, ibuf)) {
++			if (ret == 0)
++				ret = -EFAULT;
++			break;
++		}
+ 
+ 		obuf = opipe->bufs + nbuf;
+ 		*obuf = *ibuf;
+diff --git a/include/linux/bitops.h b/include/linux/bitops.h
+index 83edade218fa..ce2bb045b3fd 100644
+--- a/include/linux/bitops.h
++++ b/include/linux/bitops.h
+@@ -3,7 +3,8 @@
+ #include <asm/types.h>
+ #include <linux/bits.h>
+ 
+-#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
++#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
++#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
+ 
+ extern unsigned int __sw_hweight8(unsigned int w);
+ extern unsigned int __sw_hweight16(unsigned int w);
+diff --git a/include/linux/hid.h b/include/linux/hid.h
+index 5f3131885136..2149f650982e 100644
+--- a/include/linux/hid.h
++++ b/include/linux/hid.h
+@@ -451,7 +451,7 @@ struct hid_report_enum {
+ };
+ 
+ #define HID_MIN_BUFFER_SIZE	64		/* make sure there is at least a packet size of space */
+-#define HID_MAX_BUFFER_SIZE	4096		/* 4kb */
++#define HID_MAX_BUFFER_SIZE	8192		/* 8kb */
+ #define HID_CONTROL_FIFO_SIZE	256		/* to init devices with >100 reports */
+ #define HID_OUTPUT_FIFO_SIZE	64
+ 
+diff --git a/include/linux/mm.h b/include/linux/mm.h
+index 15f81b2b87ed..69fa3df9e712 100644
+--- a/include/linux/mm.h
++++ b/include/linux/mm.h
+@@ -488,6 +488,15 @@ static inline void get_huge_page_tail(struct page *page)
+ 
+ extern bool __get_page_tail(struct page *page);
+ 
++static inline int page_ref_count(struct page *page)
++{
++	return atomic_read(&page->_count);
++}
++
++/* 127: arbitrary random number, small enough to assemble well */
++#define page_ref_zero_or_close_to_overflow(page) \
++	((unsigned int) atomic_read(&page->_count) + 127u <= 127u)
++
+ static inline void get_page(struct page *page)
+ {
+ 	if (unlikely(PageTail(page)))
+@@ -497,10 +506,22 @@ static inline void get_page(struct page *page)
+ 	 * Getting a normal page or the head of a compound page
+ 	 * requires to already have an elevated page->_count.
+ 	 */
+-	VM_BUG_ON_PAGE(atomic_read(&page->_count) <= 0, page);
++	VM_BUG_ON_PAGE(page_ref_zero_or_close_to_overflow(page), page);
+ 	atomic_inc(&page->_count);
+ }
+ 
++static inline __must_check bool try_get_page(struct page *page)
++{
++	if (unlikely(PageTail(page)))
++		if (likely(__get_page_tail(page)))
++			return true;
++
++	if (WARN_ON_ONCE(atomic_read(&page->_count) <= 0))
++		return false;
++	atomic_inc(&page->_count);
++	return true;
++}
++
+ static inline struct page *virt_to_head_page(const void *x)
+ {
+ 	struct page *page = virt_to_page(x);
+diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
+index 24f5470d3944..0b28b65c12fb 100644
+--- a/include/linux/pipe_fs_i.h
++++ b/include/linux/pipe_fs_i.h
+@@ -112,9 +112,22 @@ struct pipe_buf_operations {
+ 	/*
+ 	 * Get a reference to the pipe buffer.
+ 	 */
+-	void (*get)(struct pipe_inode_info *, struct pipe_buffer *);
++	bool (*get)(struct pipe_inode_info *, struct pipe_buffer *);
+ };
+ 
++/**
++ * pipe_buf_get - get a reference to a pipe_buffer
++ * @pipe:	the pipe that the buffer belongs to
++ * @buf:	the buffer to get a reference to
++ *
++ * Return: %true if the reference was successfully obtained.
++ */
++static inline __must_check bool pipe_buf_get(struct pipe_inode_info *pipe,
++				struct pipe_buffer *buf)
++{
++	return buf->ops->get(pipe, buf);
++}
++
+ /* Differs from PIPE_BUF in that PIPE_SIZE is the length of the actual
+    memory allocation, whereas PIPE_BUF makes atomicity guarantees.  */
+ #define PIPE_SIZE		PAGE_SIZE
+@@ -137,7 +150,7 @@ struct pipe_inode_info *alloc_pipe_info(void);
+ void free_pipe_info(struct pipe_inode_info *);
+ 
+ /* Generic pipe buffer ops functions */
+-void generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
++bool generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
+ int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *);
+ int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
+ void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *);
+diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
+index 62a462413081..a5a1a1650668 100644
+--- a/include/net/flow_dissector.h
++++ b/include/net/flow_dissector.h
+@@ -4,6 +4,7 @@
+ #include <linux/types.h>
+ #include <linux/in6.h>
+ #include <linux/siphash.h>
++#include <linux/string.h>
+ #include <uapi/linux/if_ether.h>
+ 
+ /**
+@@ -185,4 +186,12 @@ static inline bool flow_keys_have_l4(struct flow_keys *keys)
+ 
+ u32 flow_hash_from_keys(struct flow_keys *keys);
+ 
++static inline void
++flow_dissector_init_keys(struct flow_dissector_key_control *key_control,
++			 struct flow_dissector_key_basic *key_basic)
++{
++	memset(key_control, 0, sizeof(*key_control));
++	memset(key_basic, 0, sizeof(*key_basic));
++}
++
+ #endif
+diff --git a/kernel/audit.c b/kernel/audit.c
+index bdf0cf463815..84c445db5fe1 100644
+--- a/kernel/audit.c
++++ b/kernel/audit.c
+@@ -753,13 +753,11 @@ static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature
+ 	audit_log_end(ab);
+ }
+ 
+-static int audit_set_feature(struct sk_buff *skb)
++static int audit_set_feature(struct audit_features *uaf)
+ {
+-	struct audit_features *uaf;
+ 	int i;
+ 
+ 	BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names));
+-	uaf = nlmsg_data(nlmsg_hdr(skb));
+ 
+ 	/* if there is ever a version 2 we should handle that here */
+ 
+@@ -815,6 +813,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ {
+ 	u32			seq;
+ 	void			*data;
++	int			data_len;
+ 	int			err;
+ 	struct audit_buffer	*ab;
+ 	u16			msg_type = nlh->nlmsg_type;
+@@ -838,6 +837,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 	}
+ 	seq  = nlh->nlmsg_seq;
+ 	data = nlmsg_data(nlh);
++	data_len = nlmsg_len(nlh);
+ 
+ 	switch (msg_type) {
+ 	case AUDIT_GET: {
+@@ -859,7 +859,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 		struct audit_status	s;
+ 		memset(&s, 0, sizeof(s));
+ 		/* guard against past and future API changes */
+-		memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
++		memcpy(&s, data, min_t(size_t, sizeof(s), data_len));
+ 		if (s.mask & AUDIT_STATUS_ENABLED) {
+ 			err = audit_set_enabled(s.enabled);
+ 			if (err < 0)
+@@ -908,7 +908,9 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 			return err;
+ 		break;
+ 	case AUDIT_SET_FEATURE:
+-		err = audit_set_feature(skb);
++		if (data_len < sizeof(struct audit_features))
++			return -EINVAL;
++		err = audit_set_feature(data);
+ 		if (err)
+ 			return err;
+ 		break;
+@@ -920,6 +922,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 
+ 		err = audit_filter_user(msg_type);
+ 		if (err == 1) { /* match or error */
++			char *str = data;
++
+ 			err = 0;
+ 			if (msg_type == AUDIT_USER_TTY) {
+ 				err = tty_audit_push_current();
+@@ -928,19 +932,17 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 			}
+ 			mutex_unlock(&audit_cmd_mutex);
+ 			audit_log_common_recv_msg(&ab, msg_type);
+-			if (msg_type != AUDIT_USER_TTY)
++			if (msg_type != AUDIT_USER_TTY) {
++				/* ensure NULL termination */
++				str[data_len - 1] = '\0';
+ 				audit_log_format(ab, " msg='%.*s'",
+ 						 AUDIT_MESSAGE_TEXT_MAX,
+-						 (char *)data);
+-			else {
+-				int size;
+-
++						 str);
++			} else {
+ 				audit_log_format(ab, " data=");
+-				size = nlmsg_len(nlh);
+-				if (size > 0 &&
+-				    ((unsigned char *)data)[size - 1] == '\0')
+-					size--;
+-				audit_log_n_untrustedstring(ab, data, size);
++				if (data_len > 0 && str[data_len - 1] == '\0')
++					data_len--;
++				audit_log_n_untrustedstring(ab, str, data_len);
+ 			}
+ 			audit_set_portid(ab, NETLINK_CB(skb).portid);
+ 			audit_log_end(ab);
+@@ -949,7 +951,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 		break;
+ 	case AUDIT_ADD_RULE:
+ 	case AUDIT_DEL_RULE:
+-		if (nlmsg_len(nlh) < sizeof(struct audit_rule_data))
++		if (data_len < sizeof(struct audit_rule_data))
+ 			return -EINVAL;
+ 		if (audit_enabled == AUDIT_LOCKED) {
+ 			audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
+@@ -958,7 +960,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 			return -EPERM;
+ 		}
+ 		err = audit_rule_change(msg_type, NETLINK_CB(skb).portid,
+-					   seq, data, nlmsg_len(nlh));
++					   seq, data, data_len);
+ 		break;
+ 	case AUDIT_LIST_RULES:
+ 		err = audit_list_rules_send(skb, seq);
+@@ -972,7 +974,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 	case AUDIT_MAKE_EQUIV: {
+ 		void *bufp = data;
+ 		u32 sizes[2];
+-		size_t msglen = nlmsg_len(nlh);
++		size_t msglen = data_len;
+ 		char *old, *new;
+ 
+ 		err = -EINVAL;
+@@ -1049,7 +1051,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+ 
+ 		memset(&s, 0, sizeof(s));
+ 		/* guard against past and future API changes */
+-		memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
++		memcpy(&s, data, min_t(size_t, sizeof(s), data_len));
+ 		/* check if new data is valid */
+ 		if ((s.enabled != 0 && s.enabled != 1) ||
+ 		    (s.log_passwd != 0 && s.log_passwd != 1))
+diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
+index cf7aa656b308..41a668a9d561 100644
+--- a/kernel/auditfilter.c
++++ b/kernel/auditfilter.c
+@@ -434,6 +434,7 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
+ 	bufp = data->buf;
+ 	for (i = 0; i < data->field_count; i++) {
+ 		struct audit_field *f = &entry->rule.fields[i];
++		u32 f_val;
+ 
+ 		err = -EINVAL;
+ 
+@@ -442,12 +443,12 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
+ 			goto exit_free;
+ 
+ 		f->type = data->fields[i];
+-		f->val = data->values[i];
++		f_val = data->values[i];
+ 
+ 		/* Support legacy tests for a valid loginuid */
+-		if ((f->type == AUDIT_LOGINUID) && (f->val == AUDIT_UID_UNSET)) {
++		if ((f->type == AUDIT_LOGINUID) && (f_val == AUDIT_UID_UNSET)) {
+ 			f->type = AUDIT_LOGINUID_SET;
+-			f->val = 0;
++			f_val = 0;
+ 			entry->rule.pflags |= AUDIT_LOGINUID_LEGACY;
+ 		}
+ 
+@@ -463,7 +464,7 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
+ 		case AUDIT_SUID:
+ 		case AUDIT_FSUID:
+ 		case AUDIT_OBJ_UID:
+-			f->uid = make_kuid(current_user_ns(), f->val);
++			f->uid = make_kuid(current_user_ns(), f_val);
+ 			if (!uid_valid(f->uid))
+ 				goto exit_free;
+ 			break;
+@@ -472,11 +473,12 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
+ 		case AUDIT_SGID:
+ 		case AUDIT_FSGID:
+ 		case AUDIT_OBJ_GID:
+-			f->gid = make_kgid(current_user_ns(), f->val);
++			f->gid = make_kgid(current_user_ns(), f_val);
+ 			if (!gid_valid(f->gid))
+ 				goto exit_free;
+ 			break;
+ 		case AUDIT_ARCH:
++			f->val = f_val;
+ 			entry->rule.arch_f = f;
+ 			break;
+ 		case AUDIT_SUBJ_USER:
+@@ -489,11 +491,13 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
+ 		case AUDIT_OBJ_TYPE:
+ 		case AUDIT_OBJ_LEV_LOW:
+ 		case AUDIT_OBJ_LEV_HIGH:
+-			str = audit_unpack_string(&bufp, &remain, f->val);
+-			if (IS_ERR(str))
++			str = audit_unpack_string(&bufp, &remain, f_val);
++			if (IS_ERR(str)) {
++				err = PTR_ERR(str);
+ 				goto exit_free;
+-			entry->rule.buflen += f->val;
+-
++			}
++			entry->rule.buflen += f_val;
++			f->lsm_str = str;
+ 			err = security_audit_rule_init(f->type, f->op, str,
+ 						       (void **)&f->lsm_rule);
+ 			/* Keep currently invalid fields around in case they
+@@ -502,68 +506,71 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
+ 				pr_warn("audit rule for LSM \'%s\' is invalid\n",
+ 					str);
+ 				err = 0;
+-			}
+-			if (err) {
+-				kfree(str);
++			} else if (err)
+ 				goto exit_free;
+-			} else
+-				f->lsm_str = str;
+ 			break;
+ 		case AUDIT_WATCH:
+-			str = audit_unpack_string(&bufp, &remain, f->val);
+-			if (IS_ERR(str))
++			str = audit_unpack_string(&bufp, &remain, f_val);
++			if (IS_ERR(str)) {
++				err = PTR_ERR(str);
+ 				goto exit_free;
+-			entry->rule.buflen += f->val;
+-
+-			err = audit_to_watch(&entry->rule, str, f->val, f->op);
++			}
++			err = audit_to_watch(&entry->rule, str, f_val, f->op);
+ 			if (err) {
+ 				kfree(str);
+ 				goto exit_free;
+ 			}
++			entry->rule.buflen += f_val;
+ 			break;
+ 		case AUDIT_DIR:
+-			str = audit_unpack_string(&bufp, &remain, f->val);
+-			if (IS_ERR(str))
++			str = audit_unpack_string(&bufp, &remain, f_val);
++			if (IS_ERR(str)) {
++				err = PTR_ERR(str);
+ 				goto exit_free;
+-			entry->rule.buflen += f->val;
+-
++			}
+ 			err = audit_make_tree(&entry->rule, str, f->op);
+ 			kfree(str);
+ 			if (err)
+ 				goto exit_free;
++			entry->rule.buflen += f_val;
+ 			break;
+ 		case AUDIT_INODE:
++			f->val = f_val;
+ 			err = audit_to_inode(&entry->rule, f);
+ 			if (err)
+ 				goto exit_free;
+ 			break;
+ 		case AUDIT_FILTERKEY:
+-			if (entry->rule.filterkey || f->val > AUDIT_MAX_KEY_LEN)
++			if (entry->rule.filterkey || f_val > AUDIT_MAX_KEY_LEN)
+ 				goto exit_free;
+-			str = audit_unpack_string(&bufp, &remain, f->val);
+-			if (IS_ERR(str))
++			str = audit_unpack_string(&bufp, &remain, f_val);
++			if (IS_ERR(str)) {
++				err = PTR_ERR(str);
+ 				goto exit_free;
+-			entry->rule.buflen += f->val;
++			}
++			entry->rule.buflen += f_val;
+ 			entry->rule.filterkey = str;
+ 			break;
+ 		case AUDIT_EXE:
+-			if (entry->rule.exe || f->val > PATH_MAX)
++			if (entry->rule.exe || f_val > PATH_MAX)
+ 				goto exit_free;
+-			str = audit_unpack_string(&bufp, &remain, f->val);
++			str = audit_unpack_string(&bufp, &remain, f_val);
+ 			if (IS_ERR(str)) {
+ 				err = PTR_ERR(str);
+ 				goto exit_free;
+ 			}
+-			entry->rule.buflen += f->val;
+-
+-			audit_mark = audit_alloc_mark(&entry->rule, str, f->val);
++			audit_mark = audit_alloc_mark(&entry->rule, str, f_val);
+ 			if (IS_ERR(audit_mark)) {
+ 				kfree(str);
+ 				err = PTR_ERR(audit_mark);
+ 				goto exit_free;
+ 			}
++			entry->rule.buflen += f_val;
+ 			entry->rule.exe = audit_mark;
+ 			break;
++		default:
++			f->val = f_val;
++			break;
+ 		}
+ 	}
+ 
+diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
+index 6176dc89b32c..06efd18bf3e3 100644
+--- a/kernel/trace/trace.c
++++ b/kernel/trace/trace.c
+@@ -5749,12 +5749,16 @@ static void buffer_pipe_buf_release(struct pipe_inode_info *pipe,
+ 	buf->private = 0;
+ }
+ 
+-static void buffer_pipe_buf_get(struct pipe_inode_info *pipe,
++static bool buffer_pipe_buf_get(struct pipe_inode_info *pipe,
+ 				struct pipe_buffer *buf)
+ {
+ 	struct buffer_ref *ref = (struct buffer_ref *)buf->private;
+ 
++	if (ref->ref > INT_MAX/2)
++		return false;
++
+ 	ref->ref++;
++	return true;
+ }
+ 
+ /* Pipe buffer operations for a buffer. */
+diff --git a/mm/gup.c b/mm/gup.c
+index 2cd3b31e3666..4c5857889e9d 100644
+--- a/mm/gup.c
++++ b/mm/gup.c
+@@ -126,8 +126,12 @@ retry:
+ 		}
+ 	}
+ 
+-	if (flags & FOLL_GET)
+-		get_page_foll(page);
++	if (flags & FOLL_GET) {
++		if (unlikely(!try_get_page_foll(page))) {
++			page = ERR_PTR(-ENOMEM);
++			goto out;
++		}
++	}
+ 	if (flags & FOLL_TOUCH) {
+ 		if ((flags & FOLL_WRITE) &&
+ 		    !pte_dirty(pte) && !PageDirty(page))
+@@ -289,7 +293,10 @@ static int get_gate_page(struct mm_struct *mm, unsigned long address,
+ 			goto unmap;
+ 		*page = pte_page(*pte);
+ 	}
+-	get_page(*page);
++	if (unlikely(!try_get_page(*page))) {
++		ret = -ENOMEM;
++		goto unmap;
++	}
+ out:
+ 	ret = 0;
+ unmap:
+@@ -1053,6 +1060,20 @@ struct page *get_dump_page(unsigned long addr)
+  */
+ #ifdef CONFIG_HAVE_GENERIC_RCU_GUP
+ 
++/*
++ * Return the compund head page with ref appropriately incremented,
++ * or NULL if that failed.
++ */
++static inline struct page *try_get_compound_head(struct page *page, int refs)
++{
++	struct page *head = compound_head(page);
++	if (WARN_ON_ONCE(atomic_read(&head->_count) < 0))
++		return NULL;
++	if (unlikely(!page_cache_add_speculative(head, refs)))
++		return NULL;
++	return head;
++}
++
+ #ifdef __HAVE_ARCH_PTE_SPECIAL
+ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
+ 			 int write, struct page **pages, int *nr)
+@@ -1083,6 +1104,9 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
+ 		VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
+ 		page = pte_page(pte);
+ 
++		if (WARN_ON_ONCE(page_ref_count(page) < 0))
++			goto pte_unmap;
++
+ 		if (!page_cache_get_speculative(page))
+ 			goto pte_unmap;
+ 
+@@ -1130,18 +1154,17 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr,
+ 		return 0;
+ 
+ 	refs = 0;
+-	head = pmd_page(orig);
+-	page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
++	page = pmd_page(orig) + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
+ 	tail = page;
+ 	do {
+-		VM_BUG_ON_PAGE(compound_head(page) != head, page);
+ 		pages[*nr] = page;
+ 		(*nr)++;
+ 		page++;
+ 		refs++;
+ 	} while (addr += PAGE_SIZE, addr != end);
+ 
+-	if (!page_cache_add_speculative(head, refs)) {
++	head = try_get_compound_head(pmd_page(orig), refs);
++	if (!head) {
+ 		*nr -= refs;
+ 		return 0;
+ 	}
+@@ -1177,18 +1200,17 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
+ 		return 0;
+ 
+ 	refs = 0;
+-	head = pud_page(orig);
+-	page = head + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
++	page = pud_page(orig) + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
+ 	tail = page;
+ 	do {
+-		VM_BUG_ON_PAGE(compound_head(page) != head, page);
+ 		pages[*nr] = page;
+ 		(*nr)++;
+ 		page++;
+ 		refs++;
+ 	} while (addr += PAGE_SIZE, addr != end);
+ 
+-	if (!page_cache_add_speculative(head, refs)) {
++	head = try_get_compound_head(pud_page(orig), refs);
++	if (!head) {
+ 		*nr -= refs;
+ 		return 0;
+ 	}
+@@ -1220,18 +1242,17 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr,
+ 		return 0;
+ 
+ 	refs = 0;
+-	head = pgd_page(orig);
+-	page = head + ((addr & ~PGDIR_MASK) >> PAGE_SHIFT);
++	page = pgd_page(orig) + ((addr & ~PGDIR_MASK) >> PAGE_SHIFT);
+ 	tail = page;
+ 	do {
+-		VM_BUG_ON_PAGE(compound_head(page) != head, page);
+ 		pages[*nr] = page;
+ 		(*nr)++;
+ 		page++;
+ 		refs++;
+ 	} while (addr += PAGE_SIZE, addr != end);
+ 
+-	if (!page_cache_add_speculative(head, refs)) {
++	head = try_get_compound_head(pgd_page(orig), refs);
++	if (!head) {
+ 		*nr -= refs;
+ 		return 0;
+ 	}
+diff --git a/mm/hugetlb.c b/mm/hugetlb.c
+index fd932e7a25dd..3a1501e85483 100644
+--- a/mm/hugetlb.c
++++ b/mm/hugetlb.c
+@@ -3886,6 +3886,7 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
+ 	unsigned long vaddr = *position;
+ 	unsigned long remainder = *nr_pages;
+ 	struct hstate *h = hstate_vma(vma);
++	int err = -EFAULT;
+ 
+ 	while (vaddr < vma->vm_end && remainder) {
+ 		pte_t *pte;
+@@ -3957,6 +3958,19 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
+ 
+ 		pfn_offset = (vaddr & ~huge_page_mask(h)) >> PAGE_SHIFT;
+ 		page = pte_page(huge_ptep_get(pte));
++
++		/*
++		 * Instead of doing 'try_get_page_foll()' below in the same_page
++		 * loop, just check the count once here.
++		 */
++		if (unlikely(page_count(page) <= 0)) {
++			if (pages) {
++				spin_unlock(ptl);
++				remainder = 0;
++				err = -ENOMEM;
++				break;
++			}
++		}
+ same_page:
+ 		if (pages) {
+ 			pages[i] = mem_map_offset(page, pfn_offset);
+@@ -3983,7 +3997,7 @@ same_page:
+ 	*nr_pages = remainder;
+ 	*position = vaddr;
+ 
+-	return i ? i : -EFAULT;
++	return i ? i : err;
+ }
+ 
+ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
+diff --git a/mm/internal.h b/mm/internal.h
+index f63f4393d633..d83afc995a49 100644
+--- a/mm/internal.h
++++ b/mm/internal.h
+@@ -81,7 +81,8 @@ static inline void __get_page_tail_foll(struct page *page,
+ 	 * speculative page access (like in
+ 	 * page_cache_get_speculative()) on tail pages.
+ 	 */
+-	VM_BUG_ON_PAGE(atomic_read(&compound_head(page)->_count) <= 0, page);
++	VM_BUG_ON_PAGE(page_ref_zero_or_close_to_overflow(compound_head(page)),
++		       page);
+ 	if (get_page_head)
+ 		atomic_inc(&compound_head(page)->_count);
+ 	get_huge_page_tail(page);
+@@ -106,11 +107,34 @@ static inline void get_page_foll(struct page *page)
+ 		 * Getting a normal page or the head of a compound page
+ 		 * requires to already have an elevated page->_count.
+ 		 */
+-		VM_BUG_ON_PAGE(atomic_read(&page->_count) <= 0, page);
++		VM_BUG_ON_PAGE(page_ref_zero_or_close_to_overflow(page), page);
+ 		atomic_inc(&page->_count);
+ 	}
+ }
+ 
++static inline __must_check bool try_get_page_foll(struct page *page)
++{
++	if (unlikely(PageTail(page))) {
++		if (WARN_ON_ONCE(atomic_read(&compound_head(page)->_count) <= 0))
++			return false;
++		/*
++		 * This is safe only because
++		 * __split_huge_page_refcount() can't run under
++		 * get_page_foll() because we hold the proper PT lock.
++		 */
++		__get_page_tail_foll(page, true);
++	} else {
++		/*
++		 * Getting a normal page or the head of a compound page
++		 * requires to already have an elevated page->_count.
++		 */
++		if (WARN_ON_ONCE(atomic_read(&page->_count) <= 0))
++			return false;
++		atomic_inc(&page->_count);
++	}
++	return true;
++}
++
+ extern unsigned long highest_memmap_pfn;
+ 
+ /*
+diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
+index 365de66436ac..2fd4aae8f285 100644
+--- a/net/core/fib_rules.c
++++ b/net/core/fib_rules.c
+@@ -570,7 +570,7 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
+ 
+ 	frh = nlmsg_data(nlh);
+ 	frh->family = ops->family;
+-	frh->table = rule->table;
++	frh->table = rule->table < 256 ? rule->table : RT_TABLE_COMPAT;
+ 	if (nla_put_u32(skb, FRA_TABLE, rule->table))
+ 		goto nla_put_failure;
+ 	if (nla_put_u32(skb, FRA_SUPPRESS_PREFIXLEN, rule->suppress_prefixlen))
+diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
+index c23e02a7ccb0..30eb8bdcdbda 100644
+--- a/net/ipv6/ip6_fib.c
++++ b/net/ipv6/ip6_fib.c
+@@ -780,8 +780,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
+ 					found++;
+ 					break;
+ 				}
+-				if (rt_can_ecmp)
+-					fallback_ins = fallback_ins ?: ins;
++				fallback_ins = fallback_ins ?: ins;
+ 				goto next_iter;
+ 			}
+ 
+@@ -821,7 +820,9 @@ next_iter:
+ 	}
+ 
+ 	if (fallback_ins && !found) {
+-		/* No ECMP-able route found, replace first non-ECMP one */
++		/* No matching route with same ecmp-able-ness found, replace
++		 * first matching route
++		 */
+ 		ins = fallback_ins;
+ 		iter = *ins;
+ 		found++;
+diff --git a/net/ipv6/route.c b/net/ipv6/route.c
+index fffd2ad28942..63a7d31fa9f0 100644
+--- a/net/ipv6/route.c
++++ b/net/ipv6/route.c
+@@ -2953,6 +2953,7 @@ static int ip6_route_multipath_add(struct fib6_config *cfg)
+ 		 */
+ 		cfg->fc_nlinfo.nlh->nlmsg_flags &= ~(NLM_F_EXCL |
+ 						     NLM_F_REPLACE);
++		cfg->fc_nlinfo.nlh->nlmsg_flags |= NLM_F_CREATE;
+ 		nhn++;
+ 	}
+ 
+diff --git a/net/mac80211/util.c b/net/mac80211/util.c
+index 2214c77d4172..4301a92fc160 100644
+--- a/net/mac80211/util.c
++++ b/net/mac80211/util.c
+@@ -939,16 +939,22 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
+ 				elem_parse_failed = true;
+ 			break;
+ 		case WLAN_EID_VHT_OPERATION:
+-			if (elen >= sizeof(struct ieee80211_vht_operation))
++			if (elen >= sizeof(struct ieee80211_vht_operation)) {
+ 				elems->vht_operation = (void *)pos;
+-			else
+-				elem_parse_failed = true;
++				if (calc_crc)
++					crc = crc32_be(crc, pos - 2, elen + 2);
++				break;
++			}
++			elem_parse_failed = true;
+ 			break;
+ 		case WLAN_EID_OPMODE_NOTIF:
+-			if (elen > 0)
++			if (elen > 0) {
+ 				elems->opmode_notif = pos;
+-			else
+-				elem_parse_failed = true;
++				if (calc_crc)
++					crc = crc32_be(crc, pos - 2, elen + 2);
++				break;
++			}
++			elem_parse_failed = true;
+ 			break;
+ 		case WLAN_EID_MESH_ID:
+ 			elems->mesh_id = pos;
+diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
+index bf292010760a..cc37a219e11e 100644
+--- a/net/netlink/af_netlink.c
++++ b/net/netlink/af_netlink.c
+@@ -1003,7 +1003,8 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr,
+ 	if (nlk->netlink_bind && groups) {
+ 		int group;
+ 
+-		for (group = 0; group < nlk->ngroups; group++) {
++		/* nl_groups is a u32, so cap the maximum groups we can bind */
++		for (group = 0; group < BITS_PER_TYPE(u32); group++) {
+ 			if (!test_bit(group, &groups))
+ 				continue;
+ 			err = nlk->netlink_bind(net, group + 1);
+@@ -1022,7 +1023,7 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr,
+ 			netlink_insert(sk, nladdr->nl_pid) :
+ 			netlink_autobind(sock);
+ 		if (err) {
+-			netlink_undo_bind(nlk->ngroups, groups, sk);
++			netlink_undo_bind(BITS_PER_TYPE(u32), groups, sk);
+ 			return err;
+ 		}
+ 	}
+diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
+index e5a58c82728a..5ab8205f988b 100644
+--- a/net/sched/cls_flower.c
++++ b/net/sched/cls_flower.c
+@@ -127,6 +127,7 @@ static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
+ 	struct fl_flow_key skb_key;
+ 	struct fl_flow_key skb_mkey;
+ 
++	flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
+ 	fl_clear_masked_range(&skb_key, &head->mask);
+ 	skb_key.indev_ifindex = skb->skb_iif;
+ 	/* skb_flow_dissect() does not set n_proto in case an unknown protocol,
+diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
+index df9ac3746c1b..adaaaaad527d 100644
+--- a/net/sctp/sm_statefuns.c
++++ b/net/sctp/sm_statefuns.c
+@@ -177,6 +177,16 @@ sctp_chunk_length_valid(struct sctp_chunk *chunk,
+ 	return 1;
+ }
+ 
++/* Check for format error in an ABORT chunk */
++static inline bool sctp_err_chunk_valid(struct sctp_chunk *chunk)
++{
++	struct sctp_errhdr *err;
++
++	sctp_walk_errors(err, chunk->chunk_hdr);
++
++	return (void *)err == (void *)chunk->chunk_end;
++}
++
+ /**********************************************************
+  * These are the state functions for handling chunk events.
+  **********************************************************/
+@@ -2159,6 +2169,9 @@ sctp_disposition_t sctp_sf_shutdown_pending_abort(
+ 		    sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest))
+ 		return sctp_sf_discard_chunk(net, ep, asoc, type, arg, commands);
+ 
++	if (!sctp_err_chunk_valid(chunk))
++		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
++
+ 	return __sctp_sf_do_9_1_abort(net, ep, asoc, type, arg, commands);
+ }
+ 
+@@ -2201,6 +2214,9 @@ sctp_disposition_t sctp_sf_shutdown_sent_abort(struct net *net,
+ 		    sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest))
+ 		return sctp_sf_discard_chunk(net, ep, asoc, type, arg, commands);
+ 
++	if (!sctp_err_chunk_valid(chunk))
++		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
++
+ 	/* Stop the T2-shutdown timer. */
+ 	sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
+ 			SCTP_TO(SCTP_EVENT_TIMEOUT_T2_SHUTDOWN));
+@@ -2466,6 +2482,9 @@ sctp_disposition_t sctp_sf_do_9_1_abort(struct net *net,
+ 		    sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest))
+ 		return sctp_sf_discard_chunk(net, ep, asoc, type, arg, commands);
+ 
++	if (!sctp_err_chunk_valid(chunk))
++		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
++
+ 	return __sctp_sf_do_9_1_abort(net, ep, asoc, type, arg, commands);
+ }
+ 
+@@ -2482,15 +2501,9 @@ static sctp_disposition_t __sctp_sf_do_9_1_abort(struct net *net,
+ 
+ 	/* See if we have an error cause code in the chunk.  */
+ 	len = ntohs(chunk->chunk_hdr->length);
+-	if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr)) {
+-
+-		sctp_errhdr_t *err;
+-		sctp_walk_errors(err, chunk->chunk_hdr);
+-		if ((void *)err != (void *)chunk->chunk_end)
+-			return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+ 
++	if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr))
+ 		error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
+-	}
+ 
+ 	sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, SCTP_ERROR(ECONNRESET));
+ 	/* ASSOC_FAILED will DELETE_TCB. */
+diff --git a/net/wireless/ethtool.c b/net/wireless/ethtool.c
+index e9e91298c70d..3cedf2c2b60b 100644
+--- a/net/wireless/ethtool.c
++++ b/net/wireless/ethtool.c
+@@ -6,9 +6,13 @@
+ void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+ {
+ 	struct wireless_dev *wdev = dev->ieee80211_ptr;
++	struct device *pdev = wiphy_dev(wdev->wiphy);
+ 
+-	strlcpy(info->driver, wiphy_dev(wdev->wiphy)->driver->name,
+-		sizeof(info->driver));
++	if (pdev->driver)
++		strlcpy(info->driver, pdev->driver->name,
++			sizeof(info->driver));
++	else
++		strlcpy(info->driver, "N/A", sizeof(info->driver));
+ 
+ 	strlcpy(info->version, init_utsname()->release, sizeof(info->version));
+ 
+diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
+index fd0bf278067e..4b30e91106d0 100644
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -330,6 +330,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
+ 	[NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
+ 	[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
+ 	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
++	[NL80211_ATTR_STATUS_CODE] = { .type = NLA_U16 },
+ 	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
+ 	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
+ 	[NL80211_ATTR_PID] = { .type = NLA_U32 },
+diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
+index 047c48953a20..1a90732e7621 100644
+--- a/sound/soc/codecs/pcm512x.c
++++ b/sound/soc/codecs/pcm512x.c
+@@ -1439,13 +1439,15 @@ int pcm512x_probe(struct device *dev, struct regmap *regmap)
+ 	}
+ 
+ 	pcm512x->sclk = devm_clk_get(dev, NULL);
+-	if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
+-		return -EPROBE_DEFER;
++	if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER) {
++		ret = -EPROBE_DEFER;
++		goto err;
++	}
+ 	if (!IS_ERR(pcm512x->sclk)) {
+ 		ret = clk_prepare_enable(pcm512x->sclk);
+ 		if (ret != 0) {
+ 			dev_err(dev, "Failed to enable SCLK: %d\n", ret);
+-			return ret;
++			goto err;
+ 		}
+ 	}
+ 
+diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
+index 7e26d173da41..b245379b4dfc 100644
+--- a/sound/soc/soc-dapm.c
++++ b/sound/soc/soc-dapm.c
+@@ -4317,7 +4317,7 @@ static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
+ 			continue;
+ 		if (w->power) {
+ 			dapm_seq_insert(w, &down_list, false);
+-			w->power = 0;
++			w->new_power = 0;
+ 			powerdown = 1;
+ 		}
+ 	}
+diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
+index 81bedd9bb922..7cffa98ec313 100644
+--- a/sound/soc/soc-pcm.c
++++ b/sound/soc/soc-pcm.c
+@@ -2866,16 +2866,16 @@ static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
+ 	ssize_t offset = 0;
+ 
+ 	/* FE state */
+-	offset += snprintf(buf + offset, size - offset,
++	offset += scnprintf(buf + offset, size - offset,
+ 			"[%s - %s]\n", fe->dai_link->name,
+ 			stream ? "Capture" : "Playback");
+ 
+-	offset += snprintf(buf + offset, size - offset, "State: %s\n",
++	offset += scnprintf(buf + offset, size - offset, "State: %s\n",
+ 	                dpcm_state_string(fe->dpcm[stream].state));
+ 
+ 	if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
+ 	    (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
+-		offset += snprintf(buf + offset, size - offset,
++		offset += scnprintf(buf + offset, size - offset,
+ 				"Hardware Params: "
+ 				"Format = %s, Channels = %d, Rate = %d\n",
+ 				snd_pcm_format_name(params_format(params)),
+@@ -2883,10 +2883,10 @@ static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
+ 				params_rate(params));
+ 
+ 	/* BEs state */
+-	offset += snprintf(buf + offset, size - offset, "Backends:\n");
++	offset += scnprintf(buf + offset, size - offset, "Backends:\n");
+ 
+ 	if (list_empty(&fe->dpcm[stream].be_clients)) {
+-		offset += snprintf(buf + offset, size - offset,
++		offset += scnprintf(buf + offset, size - offset,
+ 				" No active DSP links\n");
+ 		goto out;
+ 	}
+@@ -2895,16 +2895,16 @@ static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe,
+ 		struct snd_soc_pcm_runtime *be = dpcm->be;
+ 		params = &dpcm->hw_params;
+ 
+-		offset += snprintf(buf + offset, size - offset,
++		offset += scnprintf(buf + offset, size - offset,
+ 				"- %s\n", be->dai_link->name);
+ 
+-		offset += snprintf(buf + offset, size - offset,
++		offset += scnprintf(buf + offset, size - offset,
+ 				"   State: %s\n",
+ 				dpcm_state_string(be->dpcm[stream].state));
+ 
+ 		if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
+ 		    (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
+-			offset += snprintf(buf + offset, size - offset,
++			offset += scnprintf(buf + offset, size - offset,
+ 				"   Hardware Params: "
+ 				"Format = %s, Channels = %d, Rate = %d\n",
+ 				snd_pcm_format_name(params_format(params)),
+diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
+index 08a954582e31..82f3a9d78cab 100644
+--- a/virt/kvm/kvm_main.c
++++ b/virt/kvm/kvm_main.c
+@@ -1865,12 +1865,12 @@ int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+ 	if (slots->generation != ghc->generation)
+ 		kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len);
+ 
+-	if (unlikely(!ghc->memslot))
+-		return kvm_write_guest(kvm, ghc->gpa, data, len);
+-
+ 	if (kvm_is_error_hva(ghc->hva))
+ 		return -EFAULT;
+ 
++	if (unlikely(!ghc->memslot))
++		return kvm_write_guest(kvm, ghc->gpa, data, len);
++
+ 	r = __copy_to_user((void __user *)ghc->hva, data, len);
+ 	if (r)
+ 		return -EFAULT;
+@@ -1891,12 +1891,12 @@ int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
+ 	if (slots->generation != ghc->generation)
+ 		kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len);
+ 
+-	if (unlikely(!ghc->memslot))
+-		return kvm_read_guest(kvm, ghc->gpa, data, len);
+-
+ 	if (kvm_is_error_hva(ghc->hva))
+ 		return -EFAULT;
+ 
++	if (unlikely(!ghc->memslot))
++		return kvm_read_guest(kvm, ghc->gpa, data, len);
++
+ 	r = __copy_from_user(data, (void __user *)ghc->hva, len);
+ 	if (r)
+ 		return -EFAULT;