[gentoo-commits] proj/linux-patches:3.4 commit in: /

[Mike Pagano]

commit:     da70b949627e538e9465762c96f64ef07190e788
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Mon Jul 28 16:50:30 2014 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Mon Jul 28 16:50:30 2014 +0000
URL:        http://git.overlays.gentoo.org/gitweb/?p=proj/linux-patches.git;a=commit;h=da70b949

Linux patch 3.4.100

---
 0000_README              |   4 +
 1099_linux-3.4.100.patch | 929 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 933 insertions(+)

diff --git a/0000_README b/0000_README
index d5d9d81..af7f3f3 100644
--- a/0000_README
+++ b/0000_README
@@ -435,6 +435,10 @@ Patch:  1098_linux-3.4.99.patch
 From:   http://www.kernel.org
 Desc:   Linux 3.4.99
 
+Patch:  1099_linux-3.4.100.patch
+From:   http://www.kernel.org
+Desc:   Linux 3.4.100
+
 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/1099_linux-3.4.100.patch b/1099_linux-3.4.100.patch
new file mode 100644
index 0000000..597e1fd
--- /dev/null
+++ b/1099_linux-3.4.100.patch
@@ -0,0 +1,929 @@
+diff --git a/Makefile b/Makefile
+index ed97caf40f71..d6c64eb82525 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,6 +1,6 @@
+ VERSION = 3
+ PATCHLEVEL = 4
+-SUBLEVEL = 99
++SUBLEVEL = 100
+ EXTRAVERSION =
+ NAME = Saber-toothed Squirrel
+ 
+diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
+index 268b2455e7b0..b1cbcff69cdb 100644
+--- a/arch/x86/kernel/cpu/perf_event_intel.c
++++ b/arch/x86/kernel/cpu/perf_event_intel.c
+@@ -1070,6 +1070,15 @@ again:
+ 	intel_pmu_lbr_read();
+ 
+ 	/*
++	 * CondChgd bit 63 doesn't mean any overflow status. Ignore
++	 * and clear the bit.
++	 */
++	if (__test_and_clear_bit(63, (unsigned long *)&status)) {
++		if (!status)
++			goto done;
++	}
++
++	/*
+ 	 * PEBS overflow sets bit 62 in the global status register
+ 	 */
+ 	if (__test_and_clear_bit(62, (unsigned long *)&status)) {
+diff --git a/crypto/testmgr.h b/crypto/testmgr.h
+index 36e5a8ee0e1e..1ae2e0ea5492 100644
+--- a/crypto/testmgr.h
++++ b/crypto/testmgr.h
+@@ -14558,38 +14558,40 @@ static struct pcomp_testvec zlib_decomp_tv_template[] = {
+ static struct comp_testvec lzo_comp_tv_template[] = {
+ 	{
+ 		.inlen	= 70,
+-		.outlen	= 46,
++		.outlen	= 57,
+ 		.input	= "Join us now and share the software "
+ 			"Join us now and share the software ",
+ 		.output	= "\x00\x0d\x4a\x6f\x69\x6e\x20\x75"
+-			"\x73\x20\x6e\x6f\x77\x20\x61\x6e"
+-			"\x64\x20\x73\x68\x61\x72\x65\x20"
+-			"\x74\x68\x65\x20\x73\x6f\x66\x74"
+-			"\x77\x70\x01\x01\x4a\x6f\x69\x6e"
+-			"\x3d\x88\x00\x11\x00\x00",
++			  "\x73\x20\x6e\x6f\x77\x20\x61\x6e"
++			  "\x64\x20\x73\x68\x61\x72\x65\x20"
++			  "\x74\x68\x65\x20\x73\x6f\x66\x74"
++			  "\x77\x70\x01\x32\x88\x00\x0c\x65"
++			  "\x20\x74\x68\x65\x20\x73\x6f\x66"
++			  "\x74\x77\x61\x72\x65\x20\x11\x00"
++			  "\x00",
+ 	}, {
+ 		.inlen	= 159,
+-		.outlen	= 133,
++		.outlen	= 131,
+ 		.input	= "This document describes a compression method based on the LZO "
+ 			"compression algorithm.  This document defines the application of "
+ 			"the LZO algorithm used in UBIFS.",
+-		.output	= "\x00\x2b\x54\x68\x69\x73\x20\x64"
++		.output	= "\x00\x2c\x54\x68\x69\x73\x20\x64"
+ 			  "\x6f\x63\x75\x6d\x65\x6e\x74\x20"
+ 			  "\x64\x65\x73\x63\x72\x69\x62\x65"
+ 			  "\x73\x20\x61\x20\x63\x6f\x6d\x70"
+ 			  "\x72\x65\x73\x73\x69\x6f\x6e\x20"
+ 			  "\x6d\x65\x74\x68\x6f\x64\x20\x62"
+ 			  "\x61\x73\x65\x64\x20\x6f\x6e\x20"
+-			  "\x74\x68\x65\x20\x4c\x5a\x4f\x2b"
+-			  "\x8c\x00\x0d\x61\x6c\x67\x6f\x72"
+-			  "\x69\x74\x68\x6d\x2e\x20\x20\x54"
+-			  "\x68\x69\x73\x2a\x54\x01\x02\x66"
+-			  "\x69\x6e\x65\x73\x94\x06\x05\x61"
+-			  "\x70\x70\x6c\x69\x63\x61\x74\x76"
+-			  "\x0a\x6f\x66\x88\x02\x60\x09\x27"
+-			  "\xf0\x00\x0c\x20\x75\x73\x65\x64"
+-			  "\x20\x69\x6e\x20\x55\x42\x49\x46"
+-			  "\x53\x2e\x11\x00\x00",
++			  "\x74\x68\x65\x20\x4c\x5a\x4f\x20"
++			  "\x2a\x8c\x00\x09\x61\x6c\x67\x6f"
++			  "\x72\x69\x74\x68\x6d\x2e\x20\x20"
++			  "\x2e\x54\x01\x03\x66\x69\x6e\x65"
++			  "\x73\x20\x74\x06\x05\x61\x70\x70"
++			  "\x6c\x69\x63\x61\x74\x76\x0a\x6f"
++			  "\x66\x88\x02\x60\x09\x27\xf0\x00"
++			  "\x0c\x20\x75\x73\x65\x64\x20\x69"
++			  "\x6e\x20\x55\x42\x49\x46\x53\x2e"
++			  "\x11\x00\x00",
+ 	},
+ };
+ 
+diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
+index 60404f4b2446..adc9bfd4d82f 100644
+--- a/drivers/gpu/drm/radeon/radeon_display.c
++++ b/drivers/gpu/drm/radeon/radeon_display.c
+@@ -709,6 +709,10 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
+ 	struct radeon_device *rdev = dev->dev_private;
+ 	int ret = 0;
+ 
++	/* don't leak the edid if we already fetched it in detect() */
++	if (radeon_connector->edid)
++		goto got_edid;
++
+ 	/* on hw with routers, select right port */
+ 	if (radeon_connector->router.ddc_valid)
+ 		radeon_router_select_ddc_port(radeon_connector);
+@@ -748,6 +752,7 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
+ 			radeon_connector->edid = radeon_bios_get_hardcoded_edid(rdev);
+ 	}
+ 	if (radeon_connector->edid) {
++got_edid:
+ 		drm_mode_connector_update_edid_property(&radeon_connector->base, radeon_connector->edid);
+ 		ret = drm_add_edid_modes(&radeon_connector->base, radeon_connector->edid);
+ 		drm_edid_to_eld(&radeon_connector->base, radeon_connector->edid);
+diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
+index 97b2e21ac46a..cf065df9bb18 100644
+--- a/drivers/iommu/dmar.c
++++ b/drivers/iommu/dmar.c
+@@ -582,7 +582,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
+ {
+ 	struct intel_iommu *iommu;
+ 	int map_size;
+-	u32 ver;
++	u32 ver, sts;
+ 	static int iommu_allocated = 0;
+ 	int agaw = 0;
+ 	int msagaw = 0;
+@@ -652,6 +652,15 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
+ 		(unsigned long long)iommu->cap,
+ 		(unsigned long long)iommu->ecap);
+ 
++	/* Reflect status in gcmd */
++	sts = readl(iommu->reg + DMAR_GSTS_REG);
++	if (sts & DMA_GSTS_IRES)
++		iommu->gcmd |= DMA_GCMD_IRE;
++	if (sts & DMA_GSTS_TES)
++		iommu->gcmd |= DMA_GCMD_TE;
++	if (sts & DMA_GSTS_QIES)
++		iommu->gcmd |= DMA_GCMD_QIE;
++
+ 	raw_spin_lock_init(&iommu->register_lock);
+ 
+ 	drhd->iommu = iommu;
+diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
+index 4e1c6bfc9c8d..dd255c578ad9 100644
+--- a/drivers/iommu/intel-iommu.c
++++ b/drivers/iommu/intel-iommu.c
+@@ -3659,6 +3659,7 @@ static struct notifier_block device_nb = {
+ int __init intel_iommu_init(void)
+ {
+ 	int ret = 0;
++	struct dmar_drhd_unit *drhd;
+ 
+ 	/* VT-d is required for a TXT/tboot launch, so enforce that */
+ 	force_on = tboot_force_iommu();
+@@ -3669,6 +3670,20 @@ int __init intel_iommu_init(void)
+ 		return 	-ENODEV;
+ 	}
+ 
++	/*
++	 * Disable translation if already enabled prior to OS handover.
++	 */
++	for_each_drhd_unit(drhd) {
++		struct intel_iommu *iommu;
++
++		if (drhd->ignored)
++			continue;
++
++		iommu = drhd->iommu;
++		if (iommu->gcmd & DMA_GCMD_TE)
++			iommu_disable_translation(iommu);
++	}
++
+ 	if (dmar_dev_scope_init() < 0) {
+ 		if (force_on)
+ 			panic("tboot: Failed to initialize DMAR device scope\n");
+diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
+index ef1f9400b967..b2740f12b180 100644
+--- a/drivers/net/ethernet/emulex/benet/be_main.c
++++ b/drivers/net/ethernet/emulex/benet/be_main.c
+@@ -2411,7 +2411,7 @@ static int be_open(struct net_device *netdev)
+ 
+ 	for_all_evt_queues(adapter, eqo, i) {
+ 		napi_enable(&eqo->napi);
+-		be_eq_notify(adapter, eqo->q.id, true, false, 0);
++		be_eq_notify(adapter, eqo->q.id, true, true, 0);
+ 	}
+ 
+ 	status = be_cmd_link_status_query(adapter, NULL, NULL,
+diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c
+index 8e2ac643a777..ed6ec513defa 100644
+--- a/drivers/net/ethernet/sun/sunvnet.c
++++ b/drivers/net/ethernet/sun/sunvnet.c
+@@ -1086,6 +1086,24 @@ static struct vnet * __devinit vnet_find_or_create(const u64 *local_mac)
+ 	return vp;
+ }
+ 
++static void vnet_cleanup(void)
++{
++	struct vnet *vp;
++	struct net_device *dev;
++
++	mutex_lock(&vnet_list_mutex);
++	while (!list_empty(&vnet_list)) {
++		vp = list_first_entry(&vnet_list, struct vnet, list);
++		list_del(&vp->list);
++		dev = vp->dev;
++		/* vio_unregister_driver() should have cleaned up port_list */
++		BUG_ON(!list_empty(&vp->port_list));
++		unregister_netdev(dev);
++		free_netdev(dev);
++	}
++	mutex_unlock(&vnet_list_mutex);
++}
++
+ static const char *local_mac_prop = "local-mac-address";
+ 
+ static struct vnet * __devinit vnet_find_parent(struct mdesc_handle *hp,
+@@ -1244,7 +1262,6 @@ static int vnet_port_remove(struct vio_dev *vdev)
+ 
+ 		kfree(port);
+ 
+-		unregister_netdev(vp->dev);
+ 	}
+ 	return 0;
+ }
+@@ -1272,6 +1289,7 @@ static int __init vnet_init(void)
+ static void __exit vnet_exit(void)
+ {
+ 	vio_unregister_driver(&vnet_port_driver);
++	vnet_cleanup();
+ }
+ 
+ module_init(vnet_init);
+diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
+index bac88c22d990..fbe75a784edb 100644
+--- a/drivers/net/ppp/pppoe.c
++++ b/drivers/net/ppp/pppoe.c
+@@ -681,7 +681,7 @@ static int pppoe_connect(struct socket *sock, struct sockaddr *uservaddr,
+ 		po->chan.hdrlen = (sizeof(struct pppoe_hdr) +
+ 				   dev->hard_header_len);
+ 
+-		po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr);
++		po->chan.mtu = dev->mtu - sizeof(struct pppoe_hdr) - 2;
+ 		po->chan.private = sk;
+ 		po->chan.ops = &pppoe_chan_ops;
+ 
+diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
+index 9d1b3ca6334b..a884c322f3ea 100644
+--- a/drivers/net/wireless/mwifiex/main.c
++++ b/drivers/net/wireless/mwifiex/main.c
+@@ -457,6 +457,7 @@ mwifiex_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
+ 	}
+ 
+ 	tx_info = MWIFIEX_SKB_TXCB(skb);
++	memset(tx_info, 0, sizeof(*tx_info));
+ 	tx_info->bss_num = priv->bss_num;
+ 	tx_info->bss_type = priv->bss_type;
+ 	mwifiex_fill_buffer(skb);
+diff --git a/kernel/power/process.c b/kernel/power/process.c
+index 19db29f67558..f27d0c8cd9e8 100644
+--- a/kernel/power/process.c
++++ b/kernel/power/process.c
+@@ -185,6 +185,7 @@ void thaw_processes(void)
+ 
+ 	printk("Restarting tasks ... ");
+ 
++	__usermodehelper_set_disable_depth(UMH_FREEZING);
+ 	thaw_workqueues();
+ 
+ 	read_lock(&tasklist_lock);
+diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
+index 877aa733b961..b7045793bd56 100644
+--- a/kernel/time/alarmtimer.c
++++ b/kernel/time/alarmtimer.c
+@@ -569,9 +569,14 @@ static int alarm_timer_set(struct k_itimer *timr, int flags,
+ 				struct itimerspec *new_setting,
+ 				struct itimerspec *old_setting)
+ {
++	ktime_t exp;
++
+ 	if (!rtcdev)
+ 		return -ENOTSUPP;
+ 
++	if (flags & ~TIMER_ABSTIME)
++		return -EINVAL;
++
+ 	if (old_setting)
+ 		alarm_timer_get(timr, old_setting);
+ 
+@@ -581,8 +586,16 @@ static int alarm_timer_set(struct k_itimer *timr, int flags,
+ 
+ 	/* start the timer */
+ 	timr->it.alarm.interval = timespec_to_ktime(new_setting->it_interval);
+-	alarm_start(&timr->it.alarm.alarmtimer,
+-			timespec_to_ktime(new_setting->it_value));
++	exp = timespec_to_ktime(new_setting->it_value);
++	/* Convert (if necessary) to absolute time */
++	if (flags != TIMER_ABSTIME) {
++		ktime_t now;
++
++		now = alarm_bases[timr->it.alarm.alarmtimer.type].gettime();
++		exp = ktime_add(now, exp);
++	}
++
++	alarm_start(&timr->it.alarm.alarmtimer, exp);
+ 	return 0;
+ }
+ 
+@@ -714,6 +727,9 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags,
+ 	if (!alarmtimer_get_rtcdev())
+ 		return -ENOTSUPP;
+ 
++	if (flags & ~TIMER_ABSTIME)
++		return -EINVAL;
++
+ 	if (!capable(CAP_WAKE_ALARM))
+ 		return -EPERM;
+ 
+diff --git a/mm/shmem.c b/mm/shmem.c
+index 58c4a477be67..4bb5a80dd13b 100644
+--- a/mm/shmem.c
++++ b/mm/shmem.c
+@@ -76,6 +76,17 @@ static struct vfsmount *shm_mnt;
+ /* Symlink up to this size is kmalloc'ed instead of using a swappable page */
+ #define SHORT_SYMLINK_LEN 128
+ 
++/*
++ * vmtruncate_range() communicates with shmem_fault via
++ * inode->i_private (with i_mutex making sure that it has only one user at
++ * a time): we would prefer not to enlarge the shmem inode just for that.
++ */
++struct shmem_falloc {
++	wait_queue_head_t *waitq; /* faults into hole wait for punch to end */
++	pgoff_t start;		/* start of range currently being fallocated */
++	pgoff_t next;		/* the next page offset to be fallocated */
++};
++
+ struct shmem_xattr {
+ 	struct list_head list;	/* anchored by shmem_inode_info->xattr_list */
+ 	char *name;		/* xattr name */
+@@ -488,22 +499,19 @@ void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
+ 	}
+ 
+ 	index = start;
+-	for ( ; ; ) {
++	while (index <= end) {
+ 		cond_resched();
+ 		pvec.nr = shmem_find_get_pages_and_swap(mapping, index,
+ 			min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
+ 							pvec.pages, indices);
+ 		if (!pvec.nr) {
+-			if (index == start)
++			/* If all gone or hole-punch, we're done */
++			if (index == start || end != -1)
+ 				break;
++			/* But if truncating, restart to make sure all gone */
+ 			index = start;
+ 			continue;
+ 		}
+-		if (index == start && indices[0] > end) {
+-			shmem_deswap_pagevec(&pvec);
+-			pagevec_release(&pvec);
+-			break;
+-		}
+ 		mem_cgroup_uncharge_start();
+ 		for (i = 0; i < pagevec_count(&pvec); i++) {
+ 			struct page *page = pvec.pages[i];
+@@ -513,8 +521,12 @@ void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
+ 				break;
+ 
+ 			if (radix_tree_exceptional_entry(page)) {
+-				nr_swaps_freed += !shmem_free_swap(mapping,
+-								index, page);
++				if (shmem_free_swap(mapping, index, page)) {
++					/* Swap was replaced by page: retry */
++					index--;
++					break;
++				}
++				nr_swaps_freed++;
+ 				continue;
+ 			}
+ 
+@@ -522,6 +534,11 @@ void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
+ 			if (page->mapping == mapping) {
+ 				VM_BUG_ON(PageWriteback(page));
+ 				truncate_inode_page(mapping, page);
++			} else {
++				/* Page was replaced by swap: retry */
++				unlock_page(page);
++				index--;
++				break;
+ 			}
+ 			unlock_page(page);
+ 		}
+@@ -1060,6 +1077,63 @@ static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+ 	int error;
+ 	int ret = VM_FAULT_LOCKED;
+ 
++	/*
++	 * Trinity finds that probing a hole which tmpfs is punching can
++	 * prevent the hole-punch from ever completing: which in turn
++	 * locks writers out with its hold on i_mutex.  So refrain from
++	 * faulting pages into the hole while it's being punched.  Although
++	 * shmem_truncate_range() does remove the additions, it may be unable to
++	 * keep up, as each new page needs its own unmap_mapping_range() call,
++	 * and the i_mmap tree grows ever slower to scan if new vmas are added.
++	 *
++	 * It does not matter if we sometimes reach this check just before the
++	 * hole-punch begins, so that one fault then races with the punch:
++	 * we just need to make racing faults a rare case.
++	 *
++	 * The implementation below would be much simpler if we just used a
++	 * standard mutex or completion: but we cannot take i_mutex in fault,
++	 * and bloating every shmem inode for this unlikely case would be sad.
++	 */
++	if (unlikely(inode->i_private)) {
++		struct shmem_falloc *shmem_falloc;
++
++		spin_lock(&inode->i_lock);
++		shmem_falloc = inode->i_private;
++		if (shmem_falloc &&
++		    vmf->pgoff >= shmem_falloc->start &&
++		    vmf->pgoff < shmem_falloc->next) {
++			wait_queue_head_t *shmem_falloc_waitq;
++			DEFINE_WAIT(shmem_fault_wait);
++
++			ret = VM_FAULT_NOPAGE;
++			if ((vmf->flags & FAULT_FLAG_ALLOW_RETRY) &&
++			   !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT)) {
++				/* It's polite to up mmap_sem if we can */
++				up_read(&vma->vm_mm->mmap_sem);
++				ret = VM_FAULT_RETRY;
++			}
++
++			shmem_falloc_waitq = shmem_falloc->waitq;
++			prepare_to_wait(shmem_falloc_waitq, &shmem_fault_wait,
++					TASK_UNINTERRUPTIBLE);
++			spin_unlock(&inode->i_lock);
++			schedule();
++
++			/*
++			 * shmem_falloc_waitq points into the vmtruncate_range()
++			 * stack of the hole-punching task: shmem_falloc_waitq
++			 * is usually invalid by the time we reach here, but
++			 * finish_wait() does not dereference it in that case;
++			 * though i_lock needed lest racing with wake_up_all().
++			 */
++			spin_lock(&inode->i_lock);
++			finish_wait(shmem_falloc_waitq, &shmem_fault_wait);
++			spin_unlock(&inode->i_lock);
++			return ret;
++		}
++		spin_unlock(&inode->i_lock);
++	}
++
+ 	error = shmem_getpage(inode, vmf->pgoff, &vmf->page, SGP_CACHE, &ret);
+ 	if (error)
+ 		return ((error == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS);
+@@ -1071,6 +1145,47 @@ static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+ 	return ret;
+ }
+ 
++int vmtruncate_range(struct inode *inode, loff_t lstart, loff_t lend)
++{
++	/*
++	 * If the underlying filesystem is not going to provide
++	 * a way to truncate a range of blocks (punch a hole) -
++	 * we should return failure right now.
++	 * Only CONFIG_SHMEM shmem.c ever supported i_op->truncate_range().
++	 */
++	if (inode->i_op->truncate_range != shmem_truncate_range)
++		return -ENOSYS;
++
++	mutex_lock(&inode->i_mutex);
++	{
++		struct shmem_falloc shmem_falloc;
++		struct address_space *mapping = inode->i_mapping;
++		loff_t unmap_start = round_up(lstart, PAGE_SIZE);
++		loff_t unmap_end = round_down(1 + lend, PAGE_SIZE) - 1;
++		DECLARE_WAIT_QUEUE_HEAD_ONSTACK(shmem_falloc_waitq);
++
++		shmem_falloc.waitq = &shmem_falloc_waitq;
++		shmem_falloc.start = unmap_start >> PAGE_SHIFT;
++		shmem_falloc.next = (unmap_end + 1) >> PAGE_SHIFT;
++		spin_lock(&inode->i_lock);
++		inode->i_private = &shmem_falloc;
++		spin_unlock(&inode->i_lock);
++
++		if ((u64)unmap_end > (u64)unmap_start)
++			unmap_mapping_range(mapping, unmap_start,
++					    1 + unmap_end - unmap_start, 0);
++		shmem_truncate_range(inode, lstart, lend);
++		/* No need to unmap again: hole-punching leaves COWed pages */
++
++		spin_lock(&inode->i_lock);
++		inode->i_private = NULL;
++		wake_up_all(&shmem_falloc_waitq);
++		spin_unlock(&inode->i_lock);
++	}
++	mutex_unlock(&inode->i_mutex);
++	return 0;
++}
++
+ #ifdef CONFIG_NUMA
+ static int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *mpol)
+ {
+@@ -2547,6 +2662,12 @@ void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
+ }
+ EXPORT_SYMBOL_GPL(shmem_truncate_range);
+ 
++int vmtruncate_range(struct inode *inode, loff_t lstart, loff_t lend)
++{
++	/* Only CONFIG_SHMEM shmem.c ever supported i_op->truncate_range(). */
++	return -ENOSYS;
++}
++
+ #define shmem_vm_ops				generic_file_vm_ops
+ #define shmem_file_operations			ramfs_file_operations
+ #define shmem_get_inode(sb, dir, mode, dev, flags)	ramfs_get_inode(sb, dir, mode, dev)
+diff --git a/mm/truncate.c b/mm/truncate.c
+index 4224627695ba..f38055cb8af6 100644
+--- a/mm/truncate.c
++++ b/mm/truncate.c
+@@ -603,31 +603,6 @@ int vmtruncate(struct inode *inode, loff_t newsize)
+ }
+ EXPORT_SYMBOL(vmtruncate);
+ 
+-int vmtruncate_range(struct inode *inode, loff_t lstart, loff_t lend)
+-{
+-	struct address_space *mapping = inode->i_mapping;
+-	loff_t holebegin = round_up(lstart, PAGE_SIZE);
+-	loff_t holelen = 1 + lend - holebegin;
+-
+-	/*
+-	 * If the underlying filesystem is not going to provide
+-	 * a way to truncate a range of blocks (punch a hole) -
+-	 * we should return failure right now.
+-	 */
+-	if (!inode->i_op->truncate_range)
+-		return -ENOSYS;
+-
+-	mutex_lock(&inode->i_mutex);
+-	inode_dio_wait(inode);
+-	unmap_mapping_range(mapping, holebegin, holelen, 1);
+-	inode->i_op->truncate_range(inode, lstart, lend);
+-	/* unmap again to remove racily COWed private pages */
+-	unmap_mapping_range(mapping, holebegin, holelen, 1);
+-	mutex_unlock(&inode->i_mutex);
+-
+-	return 0;
+-}
+-
+ /**
+  * truncate_pagecache_range - unmap and remove pagecache that is hole-punched
+  * @inode: inode
+diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
+index 912613c566cb..37c486c019fe 100644
+--- a/net/8021q/vlan_core.c
++++ b/net/8021q/vlan_core.c
+@@ -96,8 +96,11 @@ EXPORT_SYMBOL(vlan_dev_vlan_id);
+ 
+ static struct sk_buff *vlan_reorder_header(struct sk_buff *skb)
+ {
+-	if (skb_cow(skb, skb_headroom(skb)) < 0)
++	if (skb_cow(skb, skb_headroom(skb)) < 0) {
++		kfree_skb(skb);
+ 		return NULL;
++	}
++
+ 	memmove(skb->data - ETH_HLEN, skb->data - VLAN_ETH_HLEN, 2 * ETH_ALEN);
+ 	skb->mac_header += VLAN_HLEN;
+ 	return skb;
+diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
+index 334d4cd7612f..79aaac288afb 100644
+--- a/net/appletalk/ddp.c
++++ b/net/appletalk/ddp.c
+@@ -1494,8 +1494,6 @@ static int atalk_rcv(struct sk_buff *skb, struct net_device *dev,
+ 		goto drop;
+ 
+ 	/* Queue packet (standard) */
+-	skb->sk = sock;
+-
+ 	if (sock_queue_rcv_skb(sock, skb) < 0)
+ 		goto drop;
+ 
+@@ -1649,7 +1647,6 @@ static int atalk_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr
+ 	if (!skb)
+ 		goto out;
+ 
+-	skb->sk = sk;
+ 	skb_reserve(skb, ddp_dl->header_length);
+ 	skb_reserve(skb, dev->hard_header_len);
+ 	skb->dev = dev;
+diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c
+index c32be292c7e3..2022b46ab38f 100644
+--- a/net/dns_resolver/dns_query.c
++++ b/net/dns_resolver/dns_query.c
+@@ -150,7 +150,9 @@ int dns_query(const char *type, const char *name, size_t namelen,
+ 	if (!*_result)
+ 		goto put;
+ 
+-	memcpy(*_result, upayload->data, len + 1);
++	memcpy(*_result, upayload->data, len);
++	(*_result)[len] = '\0';
++
+ 	if (_expiry)
+ 		*_expiry = rkey->expiry;
+ 
+diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
+index c8e26992742f..3f0bb3b3819d 100644
+--- a/net/ipv4/igmp.c
++++ b/net/ipv4/igmp.c
+@@ -1866,6 +1866,10 @@ int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr)
+ 
+ 	rtnl_lock();
+ 	in_dev = ip_mc_find_dev(net, imr);
++	if (!in_dev) {
++		ret = -ENODEV;
++		goto out;
++	}
+ 	ifindex = imr->imr_ifindex;
+ 	for (imlp = &inet->mc_list;
+ 	     (iml = rtnl_dereference(*imlp)) != NULL;
+@@ -1883,16 +1887,14 @@ int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr)
+ 
+ 		*imlp = iml->next_rcu;
+ 
+-		if (in_dev)
+-			ip_mc_dec_group(in_dev, group);
++		ip_mc_dec_group(in_dev, group);
+ 		rtnl_unlock();
+ 		/* decrease mem now to avoid the memleak warning */
+ 		atomic_sub(sizeof(*iml), &sk->sk_omem_alloc);
+ 		kfree_rcu(iml, rcu);
+ 		return 0;
+ 	}
+-	if (!in_dev)
+-		ret = -ENODEV;
++out:
+ 	rtnl_unlock();
+ 	return ret;
+ }
+diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
+index b69a3700642b..523541730777 100644
+--- a/net/ipv4/ip_options.c
++++ b/net/ipv4/ip_options.c
+@@ -279,6 +279,10 @@ int ip_options_compile(struct net *net,
+ 			optptr++;
+ 			continue;
+ 		}
++		if (unlikely(l < 2)) {
++			pp_ptr = optptr;
++			goto error;
++		}
+ 		optlen = optptr[1];
+ 		if (optlen<2 || optlen>l) {
+ 			pp_ptr = optptr;
+diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
+index 99eb909c9d5f..2d3290496a0a 100644
+--- a/net/ipv4/tcp_input.c
++++ b/net/ipv4/tcp_input.c
+@@ -1250,7 +1250,7 @@ static int tcp_check_dsack(struct sock *sk, const struct sk_buff *ack_skb,
+ 	}
+ 
+ 	/* D-SACK for already forgotten data... Do dumb counting. */
+-	if (dup_sack && tp->undo_marker && tp->undo_retrans &&
++	if (dup_sack && tp->undo_marker && tp->undo_retrans > 0 &&
+ 	    !after(end_seq_0, prior_snd_una) &&
+ 	    after(end_seq_0, tp->undo_marker))
+ 		tp->undo_retrans--;
+@@ -1304,7 +1304,7 @@ static int tcp_match_skb_to_sack(struct sock *sk, struct sk_buff *skb,
+ 			unsigned int new_len = (pkt_len / mss) * mss;
+ 			if (!in_sack && new_len < pkt_len) {
+ 				new_len += mss;
+-				if (new_len > skb->len)
++				if (new_len >= skb->len)
+ 					return 0;
+ 			}
+ 			pkt_len = new_len;
+@@ -1328,7 +1328,7 @@ static u8 tcp_sacktag_one(struct sock *sk,
+ 
+ 	/* Account D-SACK for retransmitted packet. */
+ 	if (dup_sack && (sacked & TCPCB_RETRANS)) {
+-		if (tp->undo_marker && tp->undo_retrans &&
++		if (tp->undo_marker && tp->undo_retrans > 0 &&
+ 		    after(end_seq, tp->undo_marker))
+ 			tp->undo_retrans--;
+ 		if (sacked & TCPCB_SACKED_ACKED)
+@@ -2226,7 +2226,7 @@ static void tcp_clear_retrans_partial(struct tcp_sock *tp)
+ 	tp->lost_out = 0;
+ 
+ 	tp->undo_marker = 0;
+-	tp->undo_retrans = 0;
++	tp->undo_retrans = -1;
+ }
+ 
+ void tcp_clear_retrans(struct tcp_sock *tp)
+@@ -3165,7 +3165,7 @@ static void tcp_fastretrans_alert(struct sock *sk, int pkts_acked,
+ 		tp->high_seq = tp->snd_nxt;
+ 		tp->prior_ssthresh = 0;
+ 		tp->undo_marker = tp->snd_una;
+-		tp->undo_retrans = tp->retrans_out;
++		tp->undo_retrans = tp->retrans_out ? : -1;
+ 
+ 		if (icsk->icsk_ca_state < TCP_CA_CWR) {
+ 			if (!(flag & FLAG_ECE))
+diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
+index 987f5cc706b4..fd414b61f966 100644
+--- a/net/ipv4/tcp_output.c
++++ b/net/ipv4/tcp_output.c
+@@ -2194,13 +2194,15 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
+ 		if (!tp->retrans_stamp)
+ 			tp->retrans_stamp = TCP_SKB_CB(skb)->when;
+ 
+-		tp->undo_retrans += tcp_skb_pcount(skb);
+-
+ 		/* snd_nxt is stored to detect loss of retransmitted segment,
+ 		 * see tcp_input.c tcp_sacktag_write_queue().
+ 		 */
+ 		TCP_SKB_CB(skb)->ack_seq = tp->snd_nxt;
+ 	}
++
++	if (tp->undo_retrans < 0)
++		tp->undo_retrans = 0;
++	tp->undo_retrans += tcp_skb_pcount(skb);
+ 	return err;
+ }
+ 
+diff --git a/net/sctp/ulpevent.c b/net/sctp/ulpevent.c
+index 8a84017834c2..57da44707eb1 100644
+--- a/net/sctp/ulpevent.c
++++ b/net/sctp/ulpevent.c
+@@ -373,9 +373,10 @@ fail:
+  * specification [SCTP] and any extensions for a list of possible
+  * error formats.
+  */
+-struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
+-	const struct sctp_association *asoc, struct sctp_chunk *chunk,
+-	__u16 flags, gfp_t gfp)
++struct sctp_ulpevent *
++sctp_ulpevent_make_remote_error(const struct sctp_association *asoc,
++				struct sctp_chunk *chunk, __u16 flags,
++				gfp_t gfp)
+ {
+ 	struct sctp_ulpevent *event;
+ 	struct sctp_remote_error *sre;
+@@ -394,8 +395,7 @@ struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
+ 	/* Copy the skb to a new skb with room for us to prepend
+ 	 * notification with.
+ 	 */
+-	skb = skb_copy_expand(chunk->skb, sizeof(struct sctp_remote_error),
+-			      0, gfp);
++	skb = skb_copy_expand(chunk->skb, sizeof(*sre), 0, gfp);
+ 
+ 	/* Pull off the rest of the cause TLV from the chunk.  */
+ 	skb_pull(chunk->skb, elen);
+@@ -406,62 +406,21 @@ struct sctp_ulpevent *sctp_ulpevent_make_remote_error(
+ 	event = sctp_skb2event(skb);
+ 	sctp_ulpevent_init(event, MSG_NOTIFICATION, skb->truesize);
+ 
+-	sre = (struct sctp_remote_error *)
+-		skb_push(skb, sizeof(struct sctp_remote_error));
++	sre = (struct sctp_remote_error *) skb_push(skb, sizeof(*sre));
+ 
+ 	/* Trim the buffer to the right length.  */
+-	skb_trim(skb, sizeof(struct sctp_remote_error) + elen);
++	skb_trim(skb, sizeof(*sre) + elen);
+ 
+-	/* Socket Extensions for SCTP
+-	 * 5.3.1.3 SCTP_REMOTE_ERROR
+-	 *
+-	 * sre_type:
+-	 *   It should be SCTP_REMOTE_ERROR.
+-	 */
++	/* RFC6458, Section 6.1.3. SCTP_REMOTE_ERROR */
++	memset(sre, 0, sizeof(*sre));
+ 	sre->sre_type = SCTP_REMOTE_ERROR;
+-
+-	/*
+-	 * Socket Extensions for SCTP
+-	 * 5.3.1.3 SCTP_REMOTE_ERROR
+-	 *
+-	 * sre_flags: 16 bits (unsigned integer)
+-	 *   Currently unused.
+-	 */
+ 	sre->sre_flags = 0;
+-
+-	/* Socket Extensions for SCTP
+-	 * 5.3.1.3 SCTP_REMOTE_ERROR
+-	 *
+-	 * sre_length: sizeof (__u32)
+-	 *
+-	 * This field is the total length of the notification data,
+-	 * including the notification header.
+-	 */
+ 	sre->sre_length = skb->len;
+-
+-	/* Socket Extensions for SCTP
+-	 * 5.3.1.3 SCTP_REMOTE_ERROR
+-	 *
+-	 * sre_error: 16 bits (unsigned integer)
+-	 * This value represents one of the Operational Error causes defined in
+-	 * the SCTP specification, in network byte order.
+-	 */
+ 	sre->sre_error = cause;
+-
+-	/* Socket Extensions for SCTP
+-	 * 5.3.1.3 SCTP_REMOTE_ERROR
+-	 *
+-	 * sre_assoc_id: sizeof (sctp_assoc_t)
+-	 *
+-	 * The association id field, holds the identifier for the association.
+-	 * All notifications for a given association have the same association
+-	 * identifier.  For TCP style socket, this field is ignored.
+-	 */
+ 	sctp_ulpevent_set_owner(event, asoc);
+ 	sre->sre_assoc_id = sctp_assoc2id(asoc);
+ 
+ 	return event;
+-
+ fail:
+ 	return NULL;
+ }
+@@ -904,7 +863,9 @@ __u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event)
+ 	return notification->sn_header.sn_type;
+ }
+ 
+-/* Copy out the sndrcvinfo into a msghdr.  */
++/* RFC6458, Section 5.3.2. SCTP Header Information Structure
++ * (SCTP_SNDRCV, DEPRECATED)
++ */
+ void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
+ 				   struct msghdr *msghdr)
+ {
+@@ -913,74 +874,21 @@ void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
+ 	if (sctp_ulpevent_is_notification(event))
+ 		return;
+ 
+-	/* Sockets API Extensions for SCTP
+-	 * Section 5.2.2 SCTP Header Information Structure (SCTP_SNDRCV)
+-	 *
+-	 * sinfo_stream: 16 bits (unsigned integer)
+-	 *
+-	 * For recvmsg() the SCTP stack places the message's stream number in
+-	 * this value.
+-	*/
++	memset(&sinfo, 0, sizeof(sinfo));
+ 	sinfo.sinfo_stream = event->stream;
+-	/* sinfo_ssn: 16 bits (unsigned integer)
+-	 *
+-	 * For recvmsg() this value contains the stream sequence number that
+-	 * the remote endpoint placed in the DATA chunk.  For fragmented
+-	 * messages this is the same number for all deliveries of the message
+-	 * (if more than one recvmsg() is needed to read the message).
+-	 */
+ 	sinfo.sinfo_ssn = event->ssn;
+-	/* sinfo_ppid: 32 bits (unsigned integer)
+-	 *
+-	 * In recvmsg() this value is
+-	 * the same information that was passed by the upper layer in the peer
+-	 * application.  Please note that byte order issues are NOT accounted
+-	 * for and this information is passed opaquely by the SCTP stack from
+-	 * one end to the other.
+-	 */
+ 	sinfo.sinfo_ppid = event->ppid;
+-	/* sinfo_flags: 16 bits (unsigned integer)
+-	 *
+-	 * This field may contain any of the following flags and is composed of
+-	 * a bitwise OR of these values.
+-	 *
+-	 * recvmsg() flags:
+-	 *
+-	 * SCTP_UNORDERED - This flag is present when the message was sent
+-	 *                 non-ordered.
+-	 */
+ 	sinfo.sinfo_flags = event->flags;
+-	/* sinfo_tsn: 32 bit (unsigned integer)
+-	 *
+-	 * For the receiving side, this field holds a TSN that was
+-	 * assigned to one of the SCTP Data Chunks.
+-	 */
+ 	sinfo.sinfo_tsn = event->tsn;
+-	/* sinfo_cumtsn: 32 bit (unsigned integer)
+-	 *
+-	 * This field will hold the current cumulative TSN as
+-	 * known by the underlying SCTP layer.  Note this field is
+-	 * ignored when sending and only valid for a receive
+-	 * operation when sinfo_flags are set to SCTP_UNORDERED.
+-	 */
+ 	sinfo.sinfo_cumtsn = event->cumtsn;
+-	/* sinfo_assoc_id: sizeof (sctp_assoc_t)
+-	 *
+-	 * The association handle field, sinfo_assoc_id, holds the identifier
+-	 * for the association announced in the COMMUNICATION_UP notification.
+-	 * All notifications for a given association have the same identifier.
+-	 * Ignored for one-to-one style sockets.
+-	 */
+ 	sinfo.sinfo_assoc_id = sctp_assoc2id(event->asoc);
+-
+-	/* context value that is set via SCTP_CONTEXT socket option. */
++	/* Context value that is set via SCTP_CONTEXT socket option. */
+ 	sinfo.sinfo_context = event->asoc->default_rcv_context;
+-
+ 	/* These fields are not used while receiving. */
+ 	sinfo.sinfo_timetolive = 0;
+ 
+ 	put_cmsg(msghdr, IPPROTO_SCTP, SCTP_SNDRCV,
+-		 sizeof(struct sctp_sndrcvinfo), (void *)&sinfo);
++		 sizeof(sinfo), &sinfo);
+ }
+ 
+ /* Do accounting for bytes received and hold a reference to the association
+diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
+index e00441a2092f..9495be3a61e0 100644
+--- a/net/tipc/bcast.c
++++ b/net/tipc/bcast.c
+@@ -541,6 +541,7 @@ receive:
+ 
+ 		buf = node->bclink.deferred_head;
+ 		node->bclink.deferred_head = buf->next;
++		buf->next = NULL;
+ 		node->bclink.deferred_size--;
+ 		goto receive;
+ 	}