[gentoo-commits] proj/linux-patches:5.4 commit in: /

[Mike Pagano]

commit:     66aa243550ca0fe12b3d0aae436558ed42c72972
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Mon Jun  6 11:04:30 2022 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Mon Jun  6 11:04:30 2022 +0000
URL:        https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=66aa2435

Linux patch 5.4.197

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

 0000_README              |    4 +
 1196_linux-5.4.197.patch | 1161 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1165 insertions(+)

diff --git a/0000_README b/0000_README
index 23f7d279..b35c40bb 100644
--- a/0000_README
+++ b/0000_README
@@ -827,6 +827,10 @@ Patch:  1195_linux-5.4.196.patch
 From:   http://www.kernel.org
 Desc:   Linux 5.4.196
 
+Patch:  1196_linux-5.4.197.patch
+From:   http://www.kernel.org
+Desc:   Linux 5.4.197
+
 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/1196_linux-5.4.197.patch b/1196_linux-5.4.197.patch
new file mode 100644
index 00000000..91dc56f8
--- /dev/null
+++ b/1196_linux-5.4.197.patch
@@ -0,0 +1,1161 @@
+diff --git a/Documentation/process/submitting-patches.rst b/Documentation/process/submitting-patches.rst
+index fb56297f70dc8..857be0d44e809 100644
+--- a/Documentation/process/submitting-patches.rst
++++ b/Documentation/process/submitting-patches.rst
+@@ -133,7 +133,7 @@ as you intend it to.
+ 
+ The maintainer will thank you if you write your patch description in a
+ form which can be easily pulled into Linux's source code management
+-system, ``git``, as a "commit log".  See :ref:`explicit_in_reply_to`.
++system, ``git``, as a "commit log".  See :ref:`the_canonical_patch_format`.
+ 
+ Solve only one problem per patch.  If your description starts to get
+ long, that's a sign that you probably need to split up your patch.
+diff --git a/Makefile b/Makefile
+index c064ed925552d..57e27af9fc0c0 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,7 +1,7 @@
+ # SPDX-License-Identifier: GPL-2.0
+ VERSION = 5
+ PATCHLEVEL = 4
+-SUBLEVEL = 196
++SUBLEVEL = 197
+ EXTRAVERSION =
+ NAME = Kleptomaniac Octopus
+ 
+diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
+index 5c11ae66b5d8e..9cf8f5417e7f4 100644
+--- a/arch/x86/pci/xen.c
++++ b/arch/x86/pci/xen.c
+@@ -442,6 +442,11 @@ void __init xen_msi_init(void)
+ 
+ 	x86_msi.setup_msi_irqs = xen_hvm_setup_msi_irqs;
+ 	x86_msi.teardown_msi_irq = xen_teardown_msi_irq;
++	/*
++	 * With XEN PIRQ/Eventchannels in use PCI/MSI[-X] masking is solely
++	 * controlled by the hypervisor.
++	 */
++	pci_msi_ignore_mask = 1;
+ }
+ #endif
+ 
+diff --git a/crypto/ecrdsa.c b/crypto/ecrdsa.c
+index 887ec21aee494..1ffcea7b03558 100644
+--- a/crypto/ecrdsa.c
++++ b/crypto/ecrdsa.c
+@@ -112,15 +112,15 @@ static int ecrdsa_verify(struct akcipher_request *req)
+ 
+ 	/* Step 1: verify that 0 < r < q, 0 < s < q */
+ 	if (vli_is_zero(r, ndigits) ||
+-	    vli_cmp(r, ctx->curve->n, ndigits) == 1 ||
++	    vli_cmp(r, ctx->curve->n, ndigits) >= 0 ||
+ 	    vli_is_zero(s, ndigits) ||
+-	    vli_cmp(s, ctx->curve->n, ndigits) == 1)
++	    vli_cmp(s, ctx->curve->n, ndigits) >= 0)
+ 		return -EKEYREJECTED;
+ 
+ 	/* Step 2: calculate hash (h) of the message (passed as input) */
+ 	/* Step 3: calculate e = h \mod q */
+ 	vli_from_le64(e, digest, ndigits);
+-	if (vli_cmp(e, ctx->curve->n, ndigits) == 1)
++	if (vli_cmp(e, ctx->curve->n, ndigits) >= 0)
+ 		vli_sub(e, e, ctx->curve->n, ndigits);
+ 	if (vli_is_zero(e, ndigits))
+ 		e[0] = 1;
+@@ -136,7 +136,7 @@ static int ecrdsa_verify(struct akcipher_request *req)
+ 	/* Step 6: calculate point C = z_1P + z_2Q, and R = x_c \mod q */
+ 	ecc_point_mult_shamir(&cc, z1, &ctx->curve->g, z2, &ctx->pub_key,
+ 			      ctx->curve);
+-	if (vli_cmp(cc.x, ctx->curve->n, ndigits) == 1)
++	if (vli_cmp(cc.x, ctx->curve->n, ndigits) >= 0)
+ 		vli_sub(cc.x, cc.x, ctx->curve->n, ndigits);
+ 
+ 	/* Step 7: if R == r signature is valid */
+diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
+index 76c668c05fa03..cc0b98affd64d 100644
+--- a/drivers/acpi/sysfs.c
++++ b/drivers/acpi/sysfs.c
+@@ -439,18 +439,29 @@ static ssize_t acpi_data_show(struct file *filp, struct kobject *kobj,
+ {
+ 	struct acpi_data_attr *data_attr;
+ 	void __iomem *base;
+-	ssize_t rc;
++	ssize_t size;
+ 
+ 	data_attr = container_of(bin_attr, struct acpi_data_attr, attr);
++	size = data_attr->attr.size;
++
++	if (offset < 0)
++		return -EINVAL;
++
++	if (offset >= size)
++		return 0;
+ 
+-	base = acpi_os_map_memory(data_attr->addr, data_attr->attr.size);
++	if (count > size - offset)
++		count = size - offset;
++
++	base = acpi_os_map_iomem(data_attr->addr, size);
+ 	if (!base)
+ 		return -ENOMEM;
+-	rc = memory_read_from_buffer(buf, count, &offset, base,
+-				     data_attr->attr.size);
+-	acpi_os_unmap_memory(base, data_attr->attr.size);
+ 
+-	return rc;
++	memcpy_fromio(buf, base + offset, count);
++
++	acpi_os_unmap_iomem(base, size);
++
++	return count;
+ }
+ 
+ static int acpi_bert_data_init(void *th, struct acpi_data_attr *data_attr)
+diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
+index 1385c2c0acbe1..89635bb117d28 100644
+--- a/drivers/char/tpm/tpm2-cmd.c
++++ b/drivers/char/tpm/tpm2-cmd.c
+@@ -706,7 +706,16 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,  u32 *value,
+ 	if (!rc) {
+ 		out = (struct tpm2_get_cap_out *)
+ 			&buf.data[TPM_HEADER_SIZE];
+-		*value = be32_to_cpu(out->value);
++		/*
++		 * To prevent failing boot up of some systems, Infineon TPM2.0
++		 * returns SUCCESS on TPM2_Startup in field upgrade mode. Also
++		 * the TPM2_Getcapability command returns a zero length list
++		 * in field upgrade mode.
++		 */
++		if (be32_to_cpu(out->property_cnt) > 0)
++			*value = be32_to_cpu(out->value);
++		else
++			rc = -ENODATA;
+ 	}
+ 	tpm_buf_destroy(&buf);
+ 	return rc;
+diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
+index 64428dbed9928..4236607f69e43 100644
+--- a/drivers/char/tpm/tpm_ibmvtpm.c
++++ b/drivers/char/tpm/tpm_ibmvtpm.c
+@@ -685,6 +685,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
+ 	if (!wait_event_timeout(ibmvtpm->crq_queue.wq,
+ 				ibmvtpm->rtce_buf != NULL,
+ 				HZ)) {
++		rc = -ENODEV;
+ 		dev_err(dev, "CRQ response timed out\n");
+ 		goto init_irq_cleanup;
+ 	}
+diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
+index e43a76b027a2a..d59455b2d401f 100644
+--- a/drivers/gpu/drm/i915/intel_pm.c
++++ b/drivers/gpu/drm/i915/intel_pm.c
+@@ -2822,7 +2822,7 @@ hsw_compute_linetime_wm(const struct intel_crtc_state *crtc_state)
+ }
+ 
+ static void intel_read_wm_latency(struct drm_i915_private *dev_priv,
+-				  u16 wm[8])
++				  u16 wm[])
+ {
+ 	struct intel_uncore *uncore = &dev_priv->uncore;
+ 
+diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
+index 37270b8f4e58b..653f436aa4593 100644
+--- a/drivers/hid/hid-multitouch.c
++++ b/drivers/hid/hid-multitouch.c
+@@ -2158,6 +2158,9 @@ static const struct hid_device_id mt_devices[] = {
+ 	{ .driver_data = MT_CLS_GOOGLE,
+ 		HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
+ 			USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
++	{ .driver_data = MT_CLS_GOOGLE,
++		HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
++			USB_DEVICE_ID_GOOGLE_WHISKERS) },
+ 
+ 	/* Generic MT device */
+ 	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
+diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c
+index 2f95e25a10f7c..53325419ec13d 100644
+--- a/drivers/i2c/busses/i2c-ismt.c
++++ b/drivers/i2c/busses/i2c-ismt.c
+@@ -81,6 +81,7 @@
+ 
+ #define ISMT_DESC_ENTRIES	2	/* number of descriptor entries */
+ #define ISMT_MAX_RETRIES	3	/* number of SMBus retries to attempt */
++#define ISMT_LOG_ENTRIES	3	/* number of interrupt cause log entries */
+ 
+ /* Hardware Descriptor Constants - Control Field */
+ #define ISMT_DESC_CWRL	0x01	/* Command/Write Length */
+@@ -174,6 +175,8 @@ struct ismt_priv {
+ 	u8 head;				/* ring buffer head pointer */
+ 	struct completion cmp;			/* interrupt completion */
+ 	u8 buffer[I2C_SMBUS_BLOCK_MAX + 16];	/* temp R/W data buffer */
++	dma_addr_t log_dma;
++	u32 *log;
+ };
+ 
+ /**
+@@ -408,6 +411,9 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr,
+ 	memset(desc, 0, sizeof(struct ismt_desc));
+ 	desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write);
+ 
++	/* Always clear the log entries */
++	memset(priv->log, 0, ISMT_LOG_ENTRIES * sizeof(u32));
++
+ 	/* Initialize common control bits */
+ 	if (likely(pci_dev_msi_enabled(priv->pci_dev)))
+ 		desc->control = ISMT_DESC_INT | ISMT_DESC_FAIR;
+@@ -697,6 +703,8 @@ static void ismt_hw_init(struct ismt_priv *priv)
+ 	/* initialize the Master Descriptor Base Address (MDBA) */
+ 	writeq(priv->io_rng_dma, priv->smba + ISMT_MSTR_MDBA);
+ 
++	writeq(priv->log_dma, priv->smba + ISMT_GR_SMTICL);
++
+ 	/* initialize the Master Control Register (MCTRL) */
+ 	writel(ISMT_MCTRL_MEIE, priv->smba + ISMT_MSTR_MCTRL);
+ 
+@@ -784,6 +792,12 @@ static int ismt_dev_init(struct ismt_priv *priv)
+ 	priv->head = 0;
+ 	init_completion(&priv->cmp);
+ 
++	priv->log = dmam_alloc_coherent(&priv->pci_dev->dev,
++					ISMT_LOG_ENTRIES * sizeof(u32),
++					&priv->log_dma, GFP_KERNEL);
++	if (!priv->log)
++		return -ENOMEM;
++
+ 	return 0;
+ }
+ 
+diff --git a/drivers/i2c/busses/i2c-thunderx-pcidrv.c b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
+index 19f8eec387172..107aeb8b54da4 100644
+--- a/drivers/i2c/busses/i2c-thunderx-pcidrv.c
++++ b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
+@@ -208,6 +208,7 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
+ 	i2c->adap.bus_recovery_info = &octeon_i2c_recovery_info;
+ 	i2c->adap.dev.parent = dev;
+ 	i2c->adap.dev.of_node = pdev->dev.of_node;
++	i2c->adap.dev.fwnode = dev->fwnode;
+ 	snprintf(i2c->adap.name, sizeof(i2c->adap.name),
+ 		 "Cavium ThunderX i2c adapter at %s", dev_name(dev));
+ 	i2c_set_adapdata(&i2c->adap, i2c);
+diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
+index bfb945fc33a17..3c9cdb87770f2 100644
+--- a/drivers/input/touchscreen/goodix.c
++++ b/drivers/input/touchscreen/goodix.c
+@@ -335,7 +335,7 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
+ 	 * The Goodix panel will send spurious interrupts after a
+ 	 * 'finger up' event, which will always cause a timeout.
+ 	 */
+-	return 0;
++	return -ENOMSG;
+ }
+ 
+ static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data)
+diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
+index 3ed8ca47bc6e6..fa674e9b6f23d 100644
+--- a/drivers/md/dm-crypt.c
++++ b/drivers/md/dm-crypt.c
+@@ -2817,6 +2817,11 @@ static int crypt_map(struct dm_target *ti, struct bio *bio)
+ 	return DM_MAPIO_SUBMITTED;
+ }
+ 
++static char hex2asc(unsigned char c)
++{
++	return c + '0' + ((unsigned)(9 - c) >> 4 & 0x27);
++}
++
+ static void crypt_status(struct dm_target *ti, status_type_t type,
+ 			 unsigned status_flags, char *result, unsigned maxlen)
+ {
+@@ -2835,9 +2840,12 @@ static void crypt_status(struct dm_target *ti, status_type_t type,
+ 		if (cc->key_size > 0) {
+ 			if (cc->key_string)
+ 				DMEMIT(":%u:%s", cc->key_size, cc->key_string);
+-			else
+-				for (i = 0; i < cc->key_size; i++)
+-					DMEMIT("%02x", cc->key[i]);
++			else {
++				for (i = 0; i < cc->key_size; i++) {
++					DMEMIT("%c%c", hex2asc(cc->key[i] >> 4),
++					       hex2asc(cc->key[i] & 0xf));
++				}
++			}
+ 		} else
+ 			DMEMIT("-");
+ 
+diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
+index 28a9eeae83b66..acbda91e7643c 100644
+--- a/drivers/md/dm-integrity.c
++++ b/drivers/md/dm-integrity.c
+@@ -4149,8 +4149,6 @@ try_smaller_buffer:
+ 	}
+ 
+ 	if (should_write_sb) {
+-		int r;
+-
+ 		init_journal(ic, 0, ic->journal_sections, 0);
+ 		r = dm_integrity_failed(ic);
+ 		if (unlikely(r)) {
+diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c
+index 71417048256af..ce6d3bce1b7b0 100644
+--- a/drivers/md/dm-stats.c
++++ b/drivers/md/dm-stats.c
+@@ -224,6 +224,7 @@ void dm_stats_cleanup(struct dm_stats *stats)
+ 				       atomic_read(&shared->in_flight[READ]),
+ 				       atomic_read(&shared->in_flight[WRITE]));
+ 			}
++			cond_resched();
+ 		}
+ 		dm_stat_free(&s->rcu_head);
+ 	}
+@@ -313,6 +314,7 @@ static int dm_stats_create(struct dm_stats *stats, sector_t start, sector_t end,
+ 	for (ni = 0; ni < n_entries; ni++) {
+ 		atomic_set(&s->stat_shared[ni].in_flight[READ], 0);
+ 		atomic_set(&s->stat_shared[ni].in_flight[WRITE], 0);
++		cond_resched();
+ 	}
+ 
+ 	if (s->n_histogram_entries) {
+@@ -325,6 +327,7 @@ static int dm_stats_create(struct dm_stats *stats, sector_t start, sector_t end,
+ 		for (ni = 0; ni < n_entries; ni++) {
+ 			s->stat_shared[ni].tmp.histogram = hi;
+ 			hi += s->n_histogram_entries + 1;
++			cond_resched();
+ 		}
+ 	}
+ 
+@@ -345,6 +348,7 @@ static int dm_stats_create(struct dm_stats *stats, sector_t start, sector_t end,
+ 			for (ni = 0; ni < n_entries; ni++) {
+ 				p[ni].histogram = hi;
+ 				hi += s->n_histogram_entries + 1;
++				cond_resched();
+ 			}
+ 		}
+ 	}
+@@ -474,6 +478,7 @@ static int dm_stats_list(struct dm_stats *stats, const char *program,
+ 			}
+ 			DMEMIT("\n");
+ 		}
++		cond_resched();
+ 	}
+ 	mutex_unlock(&stats->mutex);
+ 
+@@ -750,6 +755,7 @@ static void __dm_stat_clear(struct dm_stat *s, size_t idx_start, size_t idx_end,
+ 				local_irq_enable();
+ 			}
+ 		}
++		cond_resched();
+ 	}
+ }
+ 
+@@ -865,6 +871,8 @@ static int dm_stats_print(struct dm_stats *stats, int id,
+ 
+ 		if (unlikely(sz + 1 >= maxlen))
+ 			goto buffer_overflow;
++
++		cond_resched();
+ 	}
+ 
+ 	if (clear)
+diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c
+index 711f101447e3e..9dcdf34b7e32d 100644
+--- a/drivers/md/dm-verity-target.c
++++ b/drivers/md/dm-verity-target.c
+@@ -1217,6 +1217,7 @@ bad:
+ 
+ static struct target_type verity_target = {
+ 	.name		= "verity",
++	.features	= DM_TARGET_IMMUTABLE,
+ 	.version	= {1, 5, 0},
+ 	.module		= THIS_MODULE,
+ 	.ctr		= verity_ctr,
+diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
+index 08a7f97750f7a..c40327ad6ad53 100644
+--- a/drivers/md/raid5.c
++++ b/drivers/md/raid5.c
+@@ -609,17 +609,17 @@ int raid5_calc_degraded(struct r5conf *conf)
+ 	return degraded;
+ }
+ 
+-static int has_failed(struct r5conf *conf)
++static bool has_failed(struct r5conf *conf)
+ {
+-	int degraded;
++	int degraded = conf->mddev->degraded;
+ 
+-	if (conf->mddev->reshape_position == MaxSector)
+-		return conf->mddev->degraded > conf->max_degraded;
++	if (test_bit(MD_BROKEN, &conf->mddev->flags))
++		return true;
+ 
+-	degraded = raid5_calc_degraded(conf);
+-	if (degraded > conf->max_degraded)
+-		return 1;
+-	return 0;
++	if (conf->mddev->reshape_position != MaxSector)
++		degraded = raid5_calc_degraded(conf);
++
++	return degraded > conf->max_degraded;
+ }
+ 
+ struct stripe_head *
+@@ -2679,34 +2679,31 @@ static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
+ 	unsigned long flags;
+ 	pr_debug("raid456: error called\n");
+ 
++	pr_crit("md/raid:%s: Disk failure on %s, disabling device.\n",
++		mdname(mddev), bdevname(rdev->bdev, b));
++
+ 	spin_lock_irqsave(&conf->device_lock, flags);
++	set_bit(Faulty, &rdev->flags);
++	clear_bit(In_sync, &rdev->flags);
++	mddev->degraded = raid5_calc_degraded(conf);
+ 
+-	if (test_bit(In_sync, &rdev->flags) &&
+-	    mddev->degraded == conf->max_degraded) {
+-		/*
+-		 * Don't allow to achieve failed state
+-		 * Don't try to recover this device
+-		 */
++	if (has_failed(conf)) {
++		set_bit(MD_BROKEN, &conf->mddev->flags);
+ 		conf->recovery_disabled = mddev->recovery_disabled;
+-		spin_unlock_irqrestore(&conf->device_lock, flags);
+-		return;
++
++		pr_crit("md/raid:%s: Cannot continue operation (%d/%d failed).\n",
++			mdname(mddev), mddev->degraded, conf->raid_disks);
++	} else {
++		pr_crit("md/raid:%s: Operation continuing on %d devices.\n",
++			mdname(mddev), conf->raid_disks - mddev->degraded);
+ 	}
+ 
+-	set_bit(Faulty, &rdev->flags);
+-	clear_bit(In_sync, &rdev->flags);
+-	mddev->degraded = raid5_calc_degraded(conf);
+ 	spin_unlock_irqrestore(&conf->device_lock, flags);
+ 	set_bit(MD_RECOVERY_INTR, &mddev->recovery);
+ 
+ 	set_bit(Blocked, &rdev->flags);
+ 	set_mask_bits(&mddev->sb_flags, 0,
+ 		      BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
+-	pr_crit("md/raid:%s: Disk failure on %s, disabling device.\n"
+-		"md/raid:%s: Operation continuing on %d devices.\n",
+-		mdname(mddev),
+-		bdevname(rdev->bdev, b),
+-		mdname(mddev),
+-		conf->raid_disks - mddev->degraded);
+ 	r5c_update_on_rdev_error(mddev, rdev);
+ }
+ 
+diff --git a/drivers/media/platform/vim2m.c b/drivers/media/platform/vim2m.c
+index 8d6b09623d884..6fba00e03c67b 100644
+--- a/drivers/media/platform/vim2m.c
++++ b/drivers/media/platform/vim2m.c
+@@ -1333,12 +1333,6 @@ static int vim2m_probe(struct platform_device *pdev)
+ 	vfd->lock = &dev->dev_mutex;
+ 	vfd->v4l2_dev = &dev->v4l2_dev;
+ 
+-	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
+-	if (ret) {
+-		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+-		goto error_v4l2;
+-	}
+-
+ 	video_set_drvdata(vfd, dev);
+ 	v4l2_info(&dev->v4l2_dev,
+ 		  "Device registered as /dev/video%d\n", vfd->num);
+@@ -1361,12 +1355,20 @@ static int vim2m_probe(struct platform_device *pdev)
+ 	media_device_init(&dev->mdev);
+ 	dev->mdev.ops = &m2m_media_ops;
+ 	dev->v4l2_dev.mdev = &dev->mdev;
++#endif
++
++	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
++	if (ret) {
++		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
++		goto error_m2m;
++	}
+ 
++#ifdef CONFIG_MEDIA_CONTROLLER
+ 	ret = v4l2_m2m_register_media_controller(dev->m2m_dev, vfd,
+ 						 MEDIA_ENT_F_PROC_VIDEO_SCALER);
+ 	if (ret) {
+ 		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
+-		goto error_dev;
++		goto error_v4l2;
+ 	}
+ 
+ 	ret = media_device_register(&dev->mdev);
+@@ -1381,11 +1383,13 @@ static int vim2m_probe(struct platform_device *pdev)
+ error_m2m_mc:
+ 	v4l2_m2m_unregister_media_controller(dev->m2m_dev);
+ #endif
+-error_dev:
++error_v4l2:
+ 	video_unregister_device(&dev->vfd);
+ 	/* vim2m_device_release called by video_unregister_device to release various objects */
+ 	return ret;
+-error_v4l2:
++error_m2m:
++	v4l2_m2m_release(dev->m2m_dev);
++error_dev:
+ 	v4l2_device_unregister(&dev->v4l2_dev);
+ error_free:
+ 	kfree(dev);
+diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
+index 2c06cdcd3e751..d7478d332820e 100644
+--- a/drivers/net/ethernet/faraday/ftgmac100.c
++++ b/drivers/net/ethernet/faraday/ftgmac100.c
+@@ -1880,6 +1880,11 @@ static int ftgmac100_probe(struct platform_device *pdev)
+ 	/* AST2400  doesn't have working HW checksum generation */
+ 	if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac")))
+ 		netdev->hw_features &= ~NETIF_F_HW_CSUM;
++
++	/* AST2600 tx checksum with NCSI is broken */
++	if (priv->use_ncsi && of_device_is_compatible(np, "aspeed,ast2600-mac"))
++		netdev->hw_features &= ~NETIF_F_HW_CSUM;
++
+ 	if (np && of_get_property(np, "no-hw-checksum", NULL))
+ 		netdev->hw_features &= ~(NETIF_F_HW_CSUM | NETIF_F_RXCSUM);
+ 	netdev->features |= netdev->hw_features;
+diff --git a/drivers/pinctrl/sunxi/pinctrl-suniv-f1c100s.c b/drivers/pinctrl/sunxi/pinctrl-suniv-f1c100s.c
+index 2801ca7062732..68a5b627fb9b2 100644
+--- a/drivers/pinctrl/sunxi/pinctrl-suniv-f1c100s.c
++++ b/drivers/pinctrl/sunxi/pinctrl-suniv-f1c100s.c
+@@ -204,7 +204,7 @@ static const struct sunxi_desc_pin suniv_f1c100s_pins[] = {
+ 		  SUNXI_FUNCTION(0x0, "gpio_in"),
+ 		  SUNXI_FUNCTION(0x1, "gpio_out"),
+ 		  SUNXI_FUNCTION(0x2, "lcd"),		/* D20 */
+-		  SUNXI_FUNCTION(0x3, "lvds1"),		/* RX */
++		  SUNXI_FUNCTION(0x3, "uart2"),		/* RX */
+ 		  SUNXI_FUNCTION_IRQ_BANK(0x6, 0, 14)),
+ 	SUNXI_PIN(SUNXI_PINCTRL_PIN(D, 15),
+ 		  SUNXI_FUNCTION(0x0, "gpio_in"),
+diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
+index d8d44fd9a92f4..ea2fd3a73c3a8 100644
+--- a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
++++ b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c
+@@ -1351,9 +1351,11 @@ static int rtw_wx_set_scan(struct net_device *dev, struct iw_request_info *a,
+ 
+ 					sec_len = *(pos++); len-= 1;
+ 
+-					if (sec_len>0 && sec_len<=len) {
++					if (sec_len > 0 &&
++					    sec_len <= len &&
++					    sec_len <= 32) {
+ 						ssid[ssid_index].SsidLength = sec_len;
+-						memcpy(ssid[ssid_index].Ssid, pos, ssid[ssid_index].SsidLength);
++						memcpy(ssid[ssid_index].Ssid, pos, sec_len);
+ 						/* DBG_871X("%s COMBO_SCAN with specific ssid:%s, %d\n", __func__ */
+ 						/* 	, ssid[ssid_index].Ssid, ssid[ssid_index].SsidLength); */
+ 						ssid_index++;
+diff --git a/fs/exec.c b/fs/exec.c
+index 098de820abcc9..a7d78241082a2 100644
+--- a/fs/exec.c
++++ b/fs/exec.c
+@@ -454,6 +454,9 @@ static int prepare_arg_pages(struct linux_binprm *bprm,
+ 	unsigned long limit, ptr_size;
+ 
+ 	bprm->argc = count(argv, MAX_ARG_STRINGS);
++	if (bprm->argc == 0)
++		pr_warn_once("process '%s' launched '%s' with NULL argv: empty string added\n",
++			     current->comm, bprm->filename);
+ 	if (bprm->argc < 0)
+ 		return bprm->argc;
+ 
+@@ -482,8 +485,14 @@ static int prepare_arg_pages(struct linux_binprm *bprm,
+ 	 * the stack. They aren't stored until much later when we can't
+ 	 * signal to the parent that the child has run out of stack space.
+ 	 * Instead, calculate it here so it's possible to fail gracefully.
++	 *
++	 * In the case of argc = 0, make sure there is space for adding a
++	 * empty string (which will bump argc to 1), to ensure confused
++	 * userspace programs don't start processing from argv[1], thinking
++	 * argc can never be 0, to keep them from walking envp by accident.
++	 * See do_execveat_common().
+ 	 */
+-	ptr_size = (bprm->argc + bprm->envc) * sizeof(void *);
++	ptr_size = (max(bprm->argc, 1) + bprm->envc) * sizeof(void *);
+ 	if (limit <= ptr_size)
+ 		return -E2BIG;
+ 	limit -= ptr_size;
+@@ -1848,6 +1857,20 @@ static int __do_execve_file(int fd, struct filename *filename,
+ 	if (retval < 0)
+ 		goto out;
+ 
++	/*
++	 * When argv is empty, add an empty string ("") as argv[0] to
++	 * ensure confused userspace programs that start processing
++	 * from argv[1] won't end up walking envp. See also
++	 * bprm_stack_limits().
++	 */
++	if (bprm->argc == 0) {
++		const char *argv[] = { "", NULL };
++		retval = copy_strings_kernel(1, argv, bprm);
++		if (retval < 0)
++			goto out;
++		bprm->argc = 1;
++	}
++
+ 	retval = exec_binprm(bprm);
+ 	if (retval < 0)
+ 		goto out;
+diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
+index 9e717796e57b7..a4dc182e8989b 100644
+--- a/fs/nfs/internal.h
++++ b/fs/nfs/internal.h
+@@ -775,6 +775,7 @@ static inline bool nfs_error_is_fatal_on_server(int err)
+ 	case 0:
+ 	case -ERESTARTSYS:
+ 	case -EINTR:
++	case -ENOMEM:
+ 		return false;
+ 	}
+ 	return nfs_error_is_fatal(err);
+diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
+index 62eb78ac7437f..228c2b0753dcf 100644
+--- a/fs/nfsd/nfs4state.c
++++ b/fs/nfsd/nfs4state.c
+@@ -6894,16 +6894,12 @@ nfsd4_release_lockowner(struct svc_rqst *rqstp,
+ 		if (sop->so_is_open_owner || !same_owner_str(sop, owner))
+ 			continue;
+ 
+-		/* see if there are still any locks associated with it */
+-		lo = lockowner(sop);
+-		list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) {
+-			if (check_for_locks(stp->st_stid.sc_file, lo)) {
+-				status = nfserr_locks_held;
+-				spin_unlock(&clp->cl_lock);
+-				return status;
+-			}
++		if (atomic_read(&sop->so_count) != 1) {
++			spin_unlock(&clp->cl_lock);
++			return nfserr_locks_held;
+ 		}
+ 
++		lo = lockowner(sop);
+ 		nfs4_get_stateowner(sop);
+ 		break;
+ 	}
+diff --git a/include/linux/security.h b/include/linux/security.h
+index 3f6b8195ae9eb..aa5c7141c8d17 100644
+--- a/include/linux/security.h
++++ b/include/linux/security.h
+@@ -118,10 +118,12 @@ enum lockdown_reason {
+ 	LOCKDOWN_MMIOTRACE,
+ 	LOCKDOWN_DEBUGFS,
+ 	LOCKDOWN_XMON_WR,
++	LOCKDOWN_DBG_WRITE_KERNEL,
+ 	LOCKDOWN_INTEGRITY_MAX,
+ 	LOCKDOWN_KCORE,
+ 	LOCKDOWN_KPROBES,
+ 	LOCKDOWN_BPF_READ,
++	LOCKDOWN_DBG_READ_KERNEL,
+ 	LOCKDOWN_PERF,
+ 	LOCKDOWN_TRACEFS,
+ 	LOCKDOWN_XMON_RW,
+diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
+index a1869a6789448..a186c245a6f41 100644
+--- a/include/net/inet_hashtables.h
++++ b/include/net/inet_hashtables.h
+@@ -420,7 +420,7 @@ static inline void sk_rcv_saddr_set(struct sock *sk, __be32 addr)
+ }
+ 
+ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
+-			struct sock *sk, u32 port_offset,
++			struct sock *sk, u64 port_offset,
+ 			int (*check_established)(struct inet_timewait_death_row *,
+ 						 struct sock *, __u16,
+ 						 struct inet_timewait_sock **));
+diff --git a/include/net/netfilter/nf_conntrack_core.h b/include/net/netfilter/nf_conntrack_core.h
+index 09f2efea0b970..5805fe4947f3c 100644
+--- a/include/net/netfilter/nf_conntrack_core.h
++++ b/include/net/netfilter/nf_conntrack_core.h
+@@ -59,8 +59,13 @@ static inline int nf_conntrack_confirm(struct sk_buff *skb)
+ 	int ret = NF_ACCEPT;
+ 
+ 	if (ct) {
+-		if (!nf_ct_is_confirmed(ct))
++		if (!nf_ct_is_confirmed(ct)) {
+ 			ret = __nf_conntrack_confirm(skb);
++
++			if (ret == NF_ACCEPT)
++				ct = (struct nf_conn *)skb_nfct(skb);
++		}
++
+ 		if (likely(ret == NF_ACCEPT))
+ 			nf_ct_deliver_cached_events(ct);
+ 	}
+diff --git a/include/net/secure_seq.h b/include/net/secure_seq.h
+index d7d2495f83c27..dac91aa38c5af 100644
+--- a/include/net/secure_seq.h
++++ b/include/net/secure_seq.h
+@@ -4,8 +4,8 @@
+ 
+ #include <linux/types.h>
+ 
+-u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport);
+-u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
++u64 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport);
++u64 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
+ 			       __be16 dport);
+ u32 secure_tcp_seq(__be32 saddr, __be32 daddr,
+ 		   __be16 sport, __be16 dport);
+diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
+index 097ab02989f92..565987557ad89 100644
+--- a/kernel/debug/debug_core.c
++++ b/kernel/debug/debug_core.c
+@@ -56,6 +56,7 @@
+ #include <linux/vmacache.h>
+ #include <linux/rcupdate.h>
+ #include <linux/irq.h>
++#include <linux/security.h>
+ 
+ #include <asm/cacheflush.h>
+ #include <asm/byteorder.h>
+@@ -685,6 +686,29 @@ cpu_master_loop:
+ 				continue;
+ 			kgdb_connected = 0;
+ 		} else {
++			/*
++			 * This is a brutal way to interfere with the debugger
++			 * and prevent gdb being used to poke at kernel memory.
++			 * This could cause trouble if lockdown is applied when
++			 * there is already an active gdb session. For now the
++			 * answer is simply "don't do that". Typically lockdown
++			 * *will* be applied before the debug core gets started
++			 * so only developers using kgdb for fairly advanced
++			 * early kernel debug can be biten by this. Hopefully
++			 * they are sophisticated enough to take care of
++			 * themselves, especially with help from the lockdown
++			 * message printed on the console!
++			 */
++			if (security_locked_down(LOCKDOWN_DBG_WRITE_KERNEL)) {
++				if (IS_ENABLED(CONFIG_KGDB_KDB)) {
++					/* Switch back to kdb if possible... */
++					dbg_kdb_mode = 1;
++					continue;
++				} else {
++					/* ... otherwise just bail */
++					break;
++				}
++			}
+ 			error = gdb_serial_stub(ks);
+ 		}
+ 
+diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
+index 4567fe998c306..7c96bf9a6c2c2 100644
+--- a/kernel/debug/kdb/kdb_main.c
++++ b/kernel/debug/kdb/kdb_main.c
+@@ -45,6 +45,7 @@
+ #include <linux/proc_fs.h>
+ #include <linux/uaccess.h>
+ #include <linux/slab.h>
++#include <linux/security.h>
+ #include "kdb_private.h"
+ 
+ #undef	MODULE_PARAM_PREFIX
+@@ -198,10 +199,62 @@ struct task_struct *kdb_curr_task(int cpu)
+ }
+ 
+ /*
+- * Check whether the flags of the current command and the permissions
+- * of the kdb console has allow a command to be run.
++ * Update the permissions flags (kdb_cmd_enabled) to match the
++ * current lockdown state.
++ *
++ * Within this function the calls to security_locked_down() are "lazy". We
++ * avoid calling them if the current value of kdb_cmd_enabled already excludes
++ * flags that might be subject to lockdown. Additionally we deliberately check
++ * the lockdown flags independently (even though read lockdown implies write
++ * lockdown) since that results in both simpler code and clearer messages to
++ * the user on first-time debugger entry.
++ *
++ * The permission masks during a read+write lockdown permits the following
++ * flags: INSPECT, SIGNAL, REBOOT (and ALWAYS_SAFE).
++ *
++ * The INSPECT commands are not blocked during lockdown because they are
++ * not arbitrary memory reads. INSPECT covers the backtrace family (sometimes
++ * forcing them to have no arguments) and lsmod. These commands do expose
++ * some kernel state but do not allow the developer seated at the console to
++ * choose what state is reported. SIGNAL and REBOOT should not be controversial,
++ * given these are allowed for root during lockdown already.
++ */
++static void kdb_check_for_lockdown(void)
++{
++	const int write_flags = KDB_ENABLE_MEM_WRITE |
++				KDB_ENABLE_REG_WRITE |
++				KDB_ENABLE_FLOW_CTRL;
++	const int read_flags = KDB_ENABLE_MEM_READ |
++			       KDB_ENABLE_REG_READ;
++
++	bool need_to_lockdown_write = false;
++	bool need_to_lockdown_read = false;
++
++	if (kdb_cmd_enabled & (KDB_ENABLE_ALL | write_flags))
++		need_to_lockdown_write =
++			security_locked_down(LOCKDOWN_DBG_WRITE_KERNEL);
++
++	if (kdb_cmd_enabled & (KDB_ENABLE_ALL | read_flags))
++		need_to_lockdown_read =
++			security_locked_down(LOCKDOWN_DBG_READ_KERNEL);
++
++	/* De-compose KDB_ENABLE_ALL if required */
++	if (need_to_lockdown_write || need_to_lockdown_read)
++		if (kdb_cmd_enabled & KDB_ENABLE_ALL)
++			kdb_cmd_enabled = KDB_ENABLE_MASK & ~KDB_ENABLE_ALL;
++
++	if (need_to_lockdown_write)
++		kdb_cmd_enabled &= ~write_flags;
++
++	if (need_to_lockdown_read)
++		kdb_cmd_enabled &= ~read_flags;
++}
++
++/*
++ * Check whether the flags of the current command, the permissions of the kdb
++ * console and the lockdown state allow a command to be run.
+  */
+-static inline bool kdb_check_flags(kdb_cmdflags_t flags, int permissions,
++static bool kdb_check_flags(kdb_cmdflags_t flags, int permissions,
+ 				   bool no_args)
+ {
+ 	/* permissions comes from userspace so needs massaging slightly */
+@@ -1188,6 +1241,9 @@ static int kdb_local(kdb_reason_t reason, int error, struct pt_regs *regs,
+ 		kdb_curr_task(raw_smp_processor_id());
+ 
+ 	KDB_DEBUG_STATE("kdb_local 1", reason);
++
++	kdb_check_for_lockdown();
++
+ 	kdb_go_count = 0;
+ 	if (reason == KDB_REASON_DEBUG) {
+ 		/* special case below */
+diff --git a/lib/assoc_array.c b/lib/assoc_array.c
+index 6f4bcf5245547..b537a83678e11 100644
+--- a/lib/assoc_array.c
++++ b/lib/assoc_array.c
+@@ -1462,6 +1462,7 @@ int assoc_array_gc(struct assoc_array *array,
+ 	struct assoc_array_ptr *cursor, *ptr;
+ 	struct assoc_array_ptr *new_root, *new_parent, **new_ptr_pp;
+ 	unsigned long nr_leaves_on_tree;
++	bool retained;
+ 	int keylen, slot, nr_free, next_slot, i;
+ 
+ 	pr_devel("-->%s()\n", __func__);
+@@ -1538,6 +1539,7 @@ continue_node:
+ 		goto descend;
+ 	}
+ 
++retry_compress:
+ 	pr_devel("-- compress node %p --\n", new_n);
+ 
+ 	/* Count up the number of empty slots in this node and work out the
+@@ -1555,6 +1557,7 @@ continue_node:
+ 	pr_devel("free=%d, leaves=%lu\n", nr_free, new_n->nr_leaves_on_branch);
+ 
+ 	/* See what we can fold in */
++	retained = false;
+ 	next_slot = 0;
+ 	for (slot = 0; slot < ASSOC_ARRAY_FAN_OUT; slot++) {
+ 		struct assoc_array_shortcut *s;
+@@ -1604,9 +1607,14 @@ continue_node:
+ 			pr_devel("[%d] retain node %lu/%d [nx %d]\n",
+ 				 slot, child->nr_leaves_on_branch, nr_free + 1,
+ 				 next_slot);
++			retained = true;
+ 		}
+ 	}
+ 
++	if (retained && new_n->nr_leaves_on_branch <= ASSOC_ARRAY_FAN_OUT) {
++		pr_devel("internal nodes remain despite enough space, retrying\n");
++		goto retry_compress;
++	}
+ 	pr_devel("after: %lu\n", new_n->nr_leaves_on_branch);
+ 
+ 	nr_leaves_on_tree = new_n->nr_leaves_on_branch;
+diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
+index 490e5f3ae614a..6b100f02ee431 100644
+--- a/mm/zsmalloc.c
++++ b/mm/zsmalloc.c
+@@ -1748,11 +1748,40 @@ static enum fullness_group putback_zspage(struct size_class *class,
+  */
+ static void lock_zspage(struct zspage *zspage)
+ {
+-	struct page *page = get_first_page(zspage);
++	struct page *curr_page, *page;
+ 
+-	do {
+-		lock_page(page);
+-	} while ((page = get_next_page(page)) != NULL);
++	/*
++	 * Pages we haven't locked yet can be migrated off the list while we're
++	 * trying to lock them, so we need to be careful and only attempt to
++	 * lock each page under migrate_read_lock(). Otherwise, the page we lock
++	 * may no longer belong to the zspage. This means that we may wait for
++	 * the wrong page to unlock, so we must take a reference to the page
++	 * prior to waiting for it to unlock outside migrate_read_lock().
++	 */
++	while (1) {
++		migrate_read_lock(zspage);
++		page = get_first_page(zspage);
++		if (trylock_page(page))
++			break;
++		get_page(page);
++		migrate_read_unlock(zspage);
++		wait_on_page_locked(page);
++		put_page(page);
++	}
++
++	curr_page = page;
++	while ((page = get_next_page(curr_page))) {
++		if (trylock_page(page)) {
++			curr_page = page;
++		} else {
++			get_page(page);
++			migrate_read_unlock(zspage);
++			wait_on_page_locked(page);
++			put_page(page);
++			migrate_read_lock(zspage);
++		}
++	}
++	migrate_read_unlock(zspage);
+ }
+ 
+ static int zs_init_fs_context(struct fs_context *fc)
+diff --git a/net/core/filter.c b/net/core/filter.c
+index e16b2b5cda981..b0df4ddbe30c3 100644
+--- a/net/core/filter.c
++++ b/net/core/filter.c
+@@ -1668,7 +1668,7 @@ BPF_CALL_5(bpf_skb_store_bytes, struct sk_buff *, skb, u32, offset,
+ 
+ 	if (unlikely(flags & ~(BPF_F_RECOMPUTE_CSUM | BPF_F_INVALIDATE_HASH)))
+ 		return -EINVAL;
+-	if (unlikely(offset > 0xffff))
++	if (unlikely(offset > INT_MAX))
+ 		return -EFAULT;
+ 	if (unlikely(bpf_try_make_writable(skb, offset + len)))
+ 		return -EFAULT;
+@@ -1703,7 +1703,7 @@ BPF_CALL_4(bpf_skb_load_bytes, const struct sk_buff *, skb, u32, offset,
+ {
+ 	void *ptr;
+ 
+-	if (unlikely(offset > 0xffff))
++	if (unlikely(offset > INT_MAX))
+ 		goto err_clear;
+ 
+ 	ptr = skb_header_pointer(skb, offset, len, to);
+diff --git a/net/core/secure_seq.c b/net/core/secure_seq.c
+index 2f9796a1a63ff..a1867c65ac632 100644
+--- a/net/core/secure_seq.c
++++ b/net/core/secure_seq.c
+@@ -97,7 +97,7 @@ u32 secure_tcpv6_seq(const __be32 *saddr, const __be32 *daddr,
+ }
+ EXPORT_SYMBOL(secure_tcpv6_seq);
+ 
+-u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
++u64 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
+ 			       __be16 dport)
+ {
+ 	const struct {
+@@ -147,7 +147,7 @@ u32 secure_tcp_seq(__be32 saddr, __be32 daddr,
+ }
+ EXPORT_SYMBOL_GPL(secure_tcp_seq);
+ 
+-u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport)
++u64 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport)
+ {
+ 	net_secret_init();
+ 	return siphash_4u32((__force u32)saddr, (__force u32)daddr,
+diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
+index cbbeb0eea0c35..959f4f0c85460 100644
+--- a/net/ipv4/inet_hashtables.c
++++ b/net/ipv4/inet_hashtables.c
+@@ -464,7 +464,7 @@ not_unique:
+ 	return -EADDRNOTAVAIL;
+ }
+ 
+-static u32 inet_sk_port_offset(const struct sock *sk)
++static u64 inet_sk_port_offset(const struct sock *sk)
+ {
+ 	const struct inet_sock *inet = inet_sk(sk);
+ 
+@@ -671,8 +671,19 @@ unlock:
+ }
+ EXPORT_SYMBOL_GPL(inet_unhash);
+ 
++/* RFC 6056 3.3.4.  Algorithm 4: Double-Hash Port Selection Algorithm
++ * Note that we use 32bit integers (vs RFC 'short integers')
++ * because 2^16 is not a multiple of num_ephemeral and this
++ * property might be used by clever attacker.
++ * RFC claims using TABLE_LENGTH=10 buckets gives an improvement,
++ * we use 256 instead to really give more isolation and
++ * privacy, this only consumes 1 KB of kernel memory.
++ */
++#define INET_TABLE_PERTURB_SHIFT 8
++static u32 table_perturb[1 << INET_TABLE_PERTURB_SHIFT];
++
+ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
+-		struct sock *sk, u32 port_offset,
++		struct sock *sk, u64 port_offset,
+ 		int (*check_established)(struct inet_timewait_death_row *,
+ 			struct sock *, __u16, struct inet_timewait_sock **))
+ {
+@@ -684,8 +695,8 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
+ 	struct inet_bind_bucket *tb;
+ 	u32 remaining, offset;
+ 	int ret, i, low, high;
+-	static u32 hint;
+ 	int l3mdev;
++	u32 index;
+ 
+ 	if (port) {
+ 		head = &hinfo->bhash[inet_bhashfn(net, port,
+@@ -712,7 +723,12 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
+ 	if (likely(remaining > 1))
+ 		remaining &= ~1U;
+ 
+-	offset = (hint + port_offset) % remaining;
++	net_get_random_once(table_perturb, sizeof(table_perturb));
++	index = hash_32(port_offset, INET_TABLE_PERTURB_SHIFT);
++
++	offset = READ_ONCE(table_perturb[index]) + port_offset;
++	offset %= remaining;
++
+ 	/* In first pass we try ports of @low parity.
+ 	 * inet_csk_get_port() does the opposite choice.
+ 	 */
+@@ -766,7 +782,7 @@ next_port:
+ 	return -EADDRNOTAVAIL;
+ 
+ ok:
+-	hint += i + 2;
++	WRITE_ONCE(table_perturb[index], READ_ONCE(table_perturb[index]) + i + 2);
+ 
+ 	/* Head lock still held and bh's disabled */
+ 	inet_bind_hash(sk, tb, port);
+@@ -789,7 +805,7 @@ ok:
+ int inet_hash_connect(struct inet_timewait_death_row *death_row,
+ 		      struct sock *sk)
+ {
+-	u32 port_offset = 0;
++	u64 port_offset = 0;
+ 
+ 	if (!inet_sk(sk)->inet_num)
+ 		port_offset = inet_sk_port_offset(sk);
+diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
+index ab12e00f6bfff..528c78bc920e0 100644
+--- a/net/ipv6/inet6_hashtables.c
++++ b/net/ipv6/inet6_hashtables.c
+@@ -262,7 +262,7 @@ not_unique:
+ 	return -EADDRNOTAVAIL;
+ }
+ 
+-static u32 inet6_sk_port_offset(const struct sock *sk)
++static u64 inet6_sk_port_offset(const struct sock *sk)
+ {
+ 	const struct inet_sock *inet = inet_sk(sk);
+ 
+@@ -274,7 +274,7 @@ static u32 inet6_sk_port_offset(const struct sock *sk)
+ int inet6_hash_connect(struct inet_timewait_death_row *death_row,
+ 		       struct sock *sk)
+ {
+-	u32 port_offset = 0;
++	u64 port_offset = 0;
+ 
+ 	if (!inet_sk(sk)->inet_num)
+ 		port_offset = inet6_sk_port_offset(sk);
+diff --git a/net/key/af_key.c b/net/key/af_key.c
+index f67d3ba72c496..dd064d5eff6ed 100644
+--- a/net/key/af_key.c
++++ b/net/key/af_key.c
+@@ -2904,7 +2904,7 @@ static int count_ah_combs(const struct xfrm_tmpl *t)
+ 			break;
+ 		if (!aalg->pfkey_supported)
+ 			continue;
+-		if (aalg_tmpl_set(t, aalg))
++		if (aalg_tmpl_set(t, aalg) && aalg->available)
+ 			sz += sizeof(struct sadb_comb);
+ 	}
+ 	return sz + sizeof(struct sadb_prop);
+@@ -2922,7 +2922,7 @@ static int count_esp_combs(const struct xfrm_tmpl *t)
+ 		if (!ealg->pfkey_supported)
+ 			continue;
+ 
+-		if (!(ealg_tmpl_set(t, ealg)))
++		if (!(ealg_tmpl_set(t, ealg) && ealg->available))
+ 			continue;
+ 
+ 		for (k = 1; ; k++) {
+@@ -2933,7 +2933,7 @@ static int count_esp_combs(const struct xfrm_tmpl *t)
+ 			if (!aalg->pfkey_supported)
+ 				continue;
+ 
+-			if (aalg_tmpl_set(t, aalg))
++			if (aalg_tmpl_set(t, aalg) && aalg->available)
+ 				sz += sizeof(struct sadb_comb);
+ 		}
+ 	}
+diff --git a/net/wireless/core.c b/net/wireless/core.c
+index 5d151e8f89320..f7228afd81ebd 100644
+--- a/net/wireless/core.c
++++ b/net/wireless/core.c
+@@ -5,7 +5,7 @@
+  * Copyright 2006-2010		Johannes Berg <johannes@××××××××××××.net>
+  * Copyright 2013-2014  Intel Mobile Communications GmbH
+  * Copyright 2015-2017	Intel Deutschland GmbH
+- * Copyright (C) 2018-2019 Intel Corporation
++ * Copyright (C) 2018-2021 Intel Corporation
+  */
+ 
+ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+@@ -891,9 +891,6 @@ int wiphy_register(struct wiphy *wiphy)
+ 		return res;
+ 	}
+ 
+-	/* set up regulatory info */
+-	wiphy_regulatory_register(wiphy);
+-
+ 	list_add_rcu(&rdev->list, &cfg80211_rdev_list);
+ 	cfg80211_rdev_list_generation++;
+ 
+@@ -904,6 +901,9 @@ int wiphy_register(struct wiphy *wiphy)
+ 	cfg80211_debugfs_rdev_add(rdev);
+ 	nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
+ 
++	/* set up regulatory info */
++	wiphy_regulatory_register(wiphy);
++
+ 	if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
+ 		struct regulatory_request request;
+ 
+diff --git a/net/wireless/reg.c b/net/wireless/reg.c
+index 0f3b57a73670b..74caece779633 100644
+--- a/net/wireless/reg.c
++++ b/net/wireless/reg.c
+@@ -3790,6 +3790,7 @@ void wiphy_regulatory_register(struct wiphy *wiphy)
+ 
+ 	wiphy_update_regulatory(wiphy, lr->initiator);
+ 	wiphy_all_share_dfs_chan_state(wiphy);
++	reg_process_self_managed_hints();
+ }
+ 
+ void wiphy_regulatory_deregister(struct wiphy *wiphy)
+diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
+index 3f38583bed06f..655a6edb5d7f9 100644
+--- a/security/lockdown/lockdown.c
++++ b/security/lockdown/lockdown.c
+@@ -33,10 +33,12 @@ static const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
+ 	[LOCKDOWN_MMIOTRACE] = "unsafe mmio",
+ 	[LOCKDOWN_DEBUGFS] = "debugfs access",
+ 	[LOCKDOWN_XMON_WR] = "xmon write access",
++	[LOCKDOWN_DBG_WRITE_KERNEL] = "use of kgdb/kdb to write kernel RAM",
+ 	[LOCKDOWN_INTEGRITY_MAX] = "integrity",
+ 	[LOCKDOWN_KCORE] = "/proc/kcore access",
+ 	[LOCKDOWN_KPROBES] = "use of kprobes",
+ 	[LOCKDOWN_BPF_READ] = "use of bpf to read kernel RAM",
++	[LOCKDOWN_DBG_READ_KERNEL] = "use of kgdb/kdb to read kernel RAM",
+ 	[LOCKDOWN_PERF] = "unsafe use of perf",
+ 	[LOCKDOWN_TRACEFS] = "use of tracefs",
+ 	[LOCKDOWN_XMON_RW] = "xmon read and write access",