Merge android-4.4.156 (7eb7037) into msm-4.4

* refs/heads/tmp-7eb7037
  Linux 4.4.156
  btrfs: use correct compare function of dirty_metadata_bytes
  ASoC: wm8994: Fix missing break in switch
  s390/lib: use expoline for all bcr instructions
  mei: me: allow runtime pm for platform with D0i3
  sch_tbf: fix two null pointer dereferences on init failure
  sch_netem: avoid null pointer deref on init failure
  sch_hhf: fix null pointer dereference on init failure
  sch_multiq: fix double free on init failure
  sch_htb: fix crash on init failure
  ovl: proper cleanup of workdir
  ovl: override creds with the ones from the superblock mounter
  ovl: rename is_merge to is_lowest
  irqchip/gic: Make interrupt ID 1020 invalid
  irqchip/gic-v3: Add missing barrier to 32bit version of gic_read_iar()
  irqchip/gicv3-its: Avoid cache flush beyond ITS_BASERn memory size
  irqchip/gicv3-its: Fix memory leak in its_free_tables()
  irqchip/gic-v3-its: Recompute the number of pages on page size change
  genirq: Delay incrementing interrupt count if it's disabled/pending
  Fixes: Commit cdbf92675fad ("mm: numa: avoid waiting on freed migrated pages")
  enic: do not call enic_change_mtu in enic_probe
  Revert "ARM: imx_v6_v7_defconfig: Select ULPI support"
  irda: Only insert new objects into the global database via setsockopt
  irda: Fix memory leak caused by repeated binds of irda socket
  kbuild: make missing $DEPMOD a Warning instead of an Error
  x86/pae: use 64 bit atomic xchg function in native_ptep_get_and_clear
  debugobjects: Make stack check warning more informative
  btrfs: Don't remove block group that still has pinned down bytes
  btrfs: relocation: Only remove reloc rb_trees if reloc control has been initialized
  btrfs: replace: Reset on-disk dev stats value after replace
  powerpc/pseries: Avoid using the size greater than RTAS_ERROR_LOG_MAX.
  SMB3: Number of requests sent should be displayed for SMB3 not just CIFS
  smb3: fix reset of bytes read and written stats
  selftests/powerpc: Kill child processes on SIGINT
  staging: comedi: ni_mio_common: fix subdevice flags for PFI subdevice
  dm kcopyd: avoid softlockup in run_complete_job
  PCI: mvebu: Fix I/O space end address calculation
  scsi: aic94xx: fix an error code in aic94xx_init()
  s390/dasd: fix hanging offline processing due to canceled worker
  powerpc: Fix size calculation using resource_size()
  net/9p: fix error path of p9_virtio_probe
  irqchip/bcm7038-l1: Hide cpu offline callback when building for !SMP
  platform/x86: asus-nb-wmi: Add keymap entry for lid flip action on UX360
  mfd: sm501: Set coherent_dma_mask when creating subdevices
  ipvs: fix race between ip_vs_conn_new() and ip_vs_del_dest()
  fs/dcache.c: fix kmemcheck splat at take_dentry_name_snapshot()
  mm/fadvise.c: fix signed overflow UBSAN complaint
  scripts: modpost: check memory allocation results
  fat: validate ->i_start before using
  hfsplus: fix NULL dereference in hfsplus_lookup()
  reiserfs: change j_timestamp type to time64_t
  fork: don't copy inconsistent signal handler state to child
  hfs: prevent crash on exit from failed search
  hfsplus: don't return 0 when fill_super() failed
  cifs: check if SMB2 PDU size has been padded and suppress the warning
  vti6: remove !skb->ignore_df check from vti6_xmit()
  tcp: do not restart timewait timer on rst reception
  qlge: Fix netdev features configuration.
  net: bcmgenet: use MAC link status for fixed phy
  staging: android: ion: fix ION_IOC_{MAP,SHARE} use-after-free
  x86/speculation/l1tf: Fix up pte->pfn conversion for PAE

Conflicts:
	drivers/staging/android/ion/ion.c

Change-Id: I7153f61c3a676a788f64eeb8bab13e840bbbf985
[readded the function ion_handle_get_by_id() which got deleted with
commit 'staging: android: ion: fix ION_IOC_{MAP,SHARE} use-after-free'
since it is used in msm/msm_ion.c]
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

20 files changed, 173 insertions, 144 deletions

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 1e668fb7dd4c..176a27bc63aa 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -574,6 +574,12 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
 	btrfs_rm_dev_replace_unblocked(fs_info);
 
 	/*
+	 * Increment dev_stats_ccnt so that btrfs_run_dev_stats() will
+	 * update on-disk dev stats value during commit transaction
+	 */
+	atomic_inc(&tgt_device->dev_stats_ccnt);
+
+	/*
 	 * this is again a consistent state where no dev_replace procedure
 	 * is running, the target device is part of the filesystem, the
 	 * source device is not part of the filesystem anymore and its 1st
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d106b981d86f..ae6e3a30e61e 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1011,8 +1011,9 @@ static int btree_writepages(struct address_space *mapping,
 
 		fs_info = BTRFS_I(mapping->host)->root->fs_info;
 		/* this is a bit racy, but that's ok */
-		ret = percpu_counter_compare(&fs_info->dirty_metadata_bytes,
-					     BTRFS_DIRTY_METADATA_THRESH);
+		ret = __percpu_counter_compare(&fs_info->dirty_metadata_bytes,
+					     BTRFS_DIRTY_METADATA_THRESH,
+					     fs_info->dirty_metadata_batch);
 		if (ret < 0)
 			return 0;
 	}
@@ -3987,8 +3988,9 @@ static void __btrfs_btree_balance_dirty(struct btrfs_root *root,
 	if (flush_delayed)
 		btrfs_balance_delayed_items(root);
 
-	ret = percpu_counter_compare(&root->fs_info->dirty_metadata_bytes,
-				     BTRFS_DIRTY_METADATA_THRESH);
+	ret = __percpu_counter_compare(&root->fs_info->dirty_metadata_bytes,
+				     BTRFS_DIRTY_METADATA_THRESH,
+				     root->fs_info->dirty_metadata_batch);
 	if (ret > 0) {
 		balance_dirty_pages_ratelimited(
 				   root->fs_info->btree_inode->i_mapping);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 493c7354ec0b..a72f941ca750 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -10410,7 +10410,7 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
 		/* Don't want to race with allocators so take the groups_sem */
 		down_write(&space_info->groups_sem);
 		spin_lock(&block_group->lock);
-		if (block_group->reserved ||
+		if (block_group->reserved || block_group->pinned ||
 		    btrfs_block_group_used(&block_group->item) ||
 		    block_group->ro ||
 		    list_is_singular(&block_group->list)) {
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 9ebe027cc4b7..cfe913d2d3df 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -1318,18 +1318,19 @@ static void __del_reloc_root(struct btrfs_root *root)
 	struct mapping_node *node = NULL;
 	struct reloc_control *rc = root->fs_info->reloc_ctl;
 
-	spin_lock(&rc->reloc_root_tree.lock);
-	rb_node = tree_search(&rc->reloc_root_tree.rb_root,
-			      root->node->start);
-	if (rb_node) {
-		node = rb_entry(rb_node, struct mapping_node, rb_node);
-		rb_erase(&node->rb_node, &rc->reloc_root_tree.rb_root);
+	if (rc) {
+		spin_lock(&rc->reloc_root_tree.lock);
+		rb_node = tree_search(&rc->reloc_root_tree.rb_root,
+				      root->node->start);
+		if (rb_node) {
+			node = rb_entry(rb_node, struct mapping_node, rb_node);
+			rb_erase(&node->rb_node, &rc->reloc_root_tree.rb_root);
+		}
+		spin_unlock(&rc->reloc_root_tree.lock);
+		if (!node)
+			return;
+		BUG_ON((struct btrfs_root *)node->data != root);
 	}
-	spin_unlock(&rc->reloc_root_tree.lock);
-
-	if (!node)
-		return;
-	BUG_ON((struct btrfs_root *)node->data != root);
 
 	spin_lock(&root->fs_info->trans_lock);
 	list_del_init(&root->root_list);
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index bcbe42fb7e92..0e72a14228f8 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -285,6 +285,10 @@ static ssize_t cifs_stats_proc_write(struct file *file,
 		atomic_set(&totBufAllocCount, 0);
 		atomic_set(&totSmBufAllocCount, 0);
 #endif /* CONFIG_CIFS_STATS2 */
+		spin_lock(&GlobalMid_Lock);
+		GlobalMaxActiveXid = 0;
+		GlobalCurrentXid = 0;
+		spin_unlock(&GlobalMid_Lock);
 		spin_lock(&cifs_tcp_ses_lock);
 		list_for_each(tmp1, &cifs_tcp_ses_list) {
 			server = list_entry(tmp1, struct TCP_Server_Info,
@@ -297,6 +301,10 @@ static ssize_t cifs_stats_proc_write(struct file *file,
 							  struct cifs_tcon,
 							  tcon_list);
 					atomic_set(&tcon->num_smbs_sent, 0);
+					spin_lock(&tcon->stat_lock);
+					tcon->bytes_read = 0;
+					tcon->bytes_written = 0;
+					spin_unlock(&tcon->stat_lock);
 					if (server->ops->clear_stats)
 						server->ops->clear_stats(tcon);
 				}
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 76ccf20fbfb7..0e62bf1ebbd7 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -185,6 +185,13 @@ smb2_check_message(char *buf, unsigned int length)
 			return 0;
 
 		/*
+		 * Some windows servers (win2016) will pad also the final
+		 * PDU in a compound to 8 bytes.
+		 */
+		if (((clc_len + 7) & ~7) == len)
+			return 0;
+
+		/*
 		 * MacOS server pads after SMB2.1 write response with 3 bytes
 		 * of junk. Other servers match RFC1001 len to actual
 		 * SMB2/SMB3 frame length (header + smb2 response specific data)
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 5f5ba807b414..52d79fb04115 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -315,7 +315,7 @@ small_smb2_init(__le16 smb2_command, struct cifs_tcon *tcon,
 	smb2_hdr_assemble((struct smb2_hdr *) *request_buf, smb2_command, tcon);
 
 	if (tcon != NULL) {
-#ifdef CONFIG_CIFS_STATS2
+#ifdef CONFIG_CIFS_STATS
 		uint16_t com_code = le16_to_cpu(smb2_command);
 		cifs_stats_inc(&tcon->stats.smb2_stats.smb2_com_sent[com_code]);
 #endif
diff --git a/fs/dcache.c b/fs/dcache.c
index 94f7541c154d..86f52a555dec 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -278,7 +278,8 @@ void take_dentry_name_snapshot(struct name_snapshot *name, struct dentry *dentry
 		spin_unlock(&dentry->d_lock);
 		name->name = p->name;
 	} else {
-		memcpy(name->inline_name, dentry->d_iname, DNAME_INLINE_LEN);
+		memcpy(name->inline_name, dentry->d_iname,
+		       dentry->d_name.len + 1);
 		spin_unlock(&dentry->d_lock);
 		name->name = name->inline_name;
 	}
diff --git a/fs/fat/cache.c b/fs/fat/cache.c
index 93fc62232ec2..9ae2c4d7e921 100644
--- a/fs/fat/cache.c
+++ b/fs/fat/cache.c
@@ -224,7 +224,8 @@ static inline void cache_init(struct fat_cache_id *cid, int fclus, int dclus)
 int fat_get_cluster(struct inode *inode, int cluster, int *fclus, int *dclus)
 {
 	struct super_block *sb = inode->i_sb;
-	const int limit = sb->s_maxbytes >> MSDOS_SB(sb)->cluster_bits;
+	struct msdos_sb_info *sbi = MSDOS_SB(sb);
+	const int limit = sb->s_maxbytes >> sbi->cluster_bits;
 	struct fat_entry fatent;
 	struct fat_cache_id cid;
 	int nr;
@@ -233,6 +234,12 @@ int fat_get_cluster(struct inode *inode, int cluster, int *fclus, int *dclus)
 
 	*fclus = 0;
 	*dclus = MSDOS_I(inode)->i_start;
+	if (!fat_valid_entry(sbi, *dclus)) {
+		fat_fs_error_ratelimit(sb,
+			"%s: invalid start cluster (i_pos %lld, start %08x)",
+			__func__, MSDOS_I(inode)->i_pos, *dclus);
+		return -EIO;
+	}
 	if (cluster == 0)
 		return 0;
 
@@ -249,9 +256,8 @@ int fat_get_cluster(struct inode *inode, int cluster, int *fclus, int *dclus)
 		/* prevent the infinite loop of cluster chain */
 		if (*fclus > limit) {
 			fat_fs_error_ratelimit(sb,
-					"%s: detected the cluster chain loop"
-					" (i_pos %lld)", __func__,
-					MSDOS_I(inode)->i_pos);
+				"%s: detected the cluster chain loop (i_pos %lld)",
+				__func__, MSDOS_I(inode)->i_pos);
 			nr = -EIO;
 			goto out;
 		}
@@ -261,9 +267,8 @@ int fat_get_cluster(struct inode *inode, int cluster, int *fclus, int *dclus)
 			goto out;
 		else if (nr == FAT_ENT_FREE) {
 			fat_fs_error_ratelimit(sb,
-				       "%s: invalid cluster chain (i_pos %lld)",
-				       __func__,
-				       MSDOS_I(inode)->i_pos);
+				"%s: invalid cluster chain (i_pos %lld)",
+				__func__, MSDOS_I(inode)->i_pos);
 			nr = -EIO;
 			goto out;
 		} else if (nr == FAT_ENT_EOF) {
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index be5e15323bab..1849b1adb6b9 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -344,6 +344,11 @@ static inline void fatent_brelse(struct fat_entry *fatent)
 	fatent->fat_inode = NULL;
 }
 
+static inline bool fat_valid_entry(struct msdos_sb_info *sbi, int entry)
+{
+	return FAT_START_ENT <= entry && entry < sbi->max_cluster;
+}
+
 extern void fat_ent_access_init(struct super_block *sb);
 extern int fat_ent_read(struct inode *inode, struct fat_entry *fatent,
 			int entry);
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 6abd78629140..e1f7655e75cb 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -23,7 +23,7 @@ static void fat12_ent_blocknr(struct super_block *sb, int entry,
 {
 	struct msdos_sb_info *sbi = MSDOS_SB(sb);
 	int bytes = entry + (entry >> 1);
-	WARN_ON(entry < FAT_START_ENT || sbi->max_cluster <= entry);
+	WARN_ON(!fat_valid_entry(sbi, entry));
 	*offset = bytes & (sb->s_blocksize - 1);
 	*blocknr = sbi->fat_start + (bytes >> sb->s_blocksize_bits);
 }
@@ -33,7 +33,7 @@ static void fat_ent_blocknr(struct super_block *sb, int entry,
 {
 	struct msdos_sb_info *sbi = MSDOS_SB(sb);
 	int bytes = (entry << sbi->fatent_shift);
-	WARN_ON(entry < FAT_START_ENT || sbi->max_cluster <= entry);
+	WARN_ON(!fat_valid_entry(sbi, entry));
 	*offset = bytes & (sb->s_blocksize - 1);
 	*blocknr = sbi->fat_start + (bytes >> sb->s_blocksize_bits);
 }
@@ -354,7 +354,7 @@ int fat_ent_read(struct inode *inode, struct fat_entry *fatent, int entry)
 	int err, offset;
 	sector_t blocknr;
 
-	if (entry < FAT_START_ENT || sbi->max_cluster <= entry) {
+	if (!fat_valid_entry(sbi, entry)) {
 		fatent_brelse(fatent);
 		fat_fs_error(sb, "invalid access to FAT (entry 0x%08x)", entry);
 		return -EIO;
diff --git a/fs/hfs/brec.c b/fs/hfs/brec.c
index 6fc766df0461..2a6f3c67cb3f 100644
--- a/fs/hfs/brec.c
+++ b/fs/hfs/brec.c
@@ -74,9 +74,10 @@ int hfs_brec_insert(struct hfs_find_data *fd, void *entry, int entry_len)
 	if (!fd->bnode) {
 		if (!tree->root)
 			hfs_btree_inc_height(tree);
-		fd->bnode = hfs_bnode_find(tree, tree->leaf_head);
-		if (IS_ERR(fd->bnode))
-			return PTR_ERR(fd->bnode);
+		node = hfs_bnode_find(tree, tree->leaf_head);
+		if (IS_ERR(node))
+			return PTR_ERR(node);
+		fd->bnode = node;
 		fd->record = -1;
 	}
 	new_node = NULL;
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index d0f39dcbb58e..2b6e2ad57bf9 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -77,13 +77,13 @@ again:
 				cpu_to_be32(HFSP_HARDLINK_TYPE) &&
 				entry.file.user_info.fdCreator ==
 				cpu_to_be32(HFSP_HFSPLUS_CREATOR) &&
+				HFSPLUS_SB(sb)->hidden_dir &&
 				(entry.file.create_date ==
 					HFSPLUS_I(HFSPLUS_SB(sb)->hidden_dir)->
 						create_date ||
 				entry.file.create_date ==
 					HFSPLUS_I(d_inode(sb->s_root))->
-						create_date) &&
-				HFSPLUS_SB(sb)->hidden_dir) {
+						create_date)) {
 			struct qstr str;
 			char name[32];
 
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index fa40e756c501..422e00dc5f3b 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -521,8 +521,10 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 		goto out_put_root;
 	if (!hfs_brec_read(&fd, &entry, sizeof(entry))) {
 		hfs_find_exit(&fd);
-		if (entry.type != cpu_to_be16(HFSPLUS_FOLDER))
+		if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) {
+			err = -EINVAL;
 			goto out_put_root;
+		}
 		inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id));
 		if (IS_ERR(inode)) {
 			err = PTR_ERR(inode);
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 63a0d0ba36de..64c5386d0c1b 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -317,7 +317,6 @@ int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
 	struct dentry *upperdir;
 	struct dentry *upperdentry;
 	const struct cred *old_cred;
-	struct cred *override_cred;
 	char *link = NULL;
 
 	if (WARN_ON(!workdir))
@@ -336,28 +335,7 @@ int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
 			return PTR_ERR(link);
 	}
 
-	err = -ENOMEM;
-	override_cred = prepare_creds();
-	if (!override_cred)
-		goto out_free_link;
-
-	override_cred->fsuid = stat->uid;
-	override_cred->fsgid = stat->gid;
-	/*
-	 * CAP_SYS_ADMIN for copying up extended attributes
-	 * CAP_DAC_OVERRIDE for create
-	 * CAP_FOWNER for chmod, timestamp update
-	 * CAP_FSETID for chmod
-	 * CAP_CHOWN for chown
-	 * CAP_MKNOD for mknod
-	 */
-	cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
-	cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
-	cap_raise(override_cred->cap_effective, CAP_FOWNER);
-	cap_raise(override_cred->cap_effective, CAP_FSETID);
-	cap_raise(override_cred->cap_effective, CAP_CHOWN);
-	cap_raise(override_cred->cap_effective, CAP_MKNOD);
-	old_cred = override_creds(override_cred);
+	old_cred = ovl_override_creds(dentry->d_sb);
 
 	err = -EIO;
 	if (lock_rename(workdir, upperdir) != NULL) {
@@ -380,9 +358,7 @@ int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
 out_unlock:
 	unlock_rename(workdir, upperdir);
 	revert_creds(old_cred);
-	put_cred(override_cred);
 
-out_free_link:
 	if (link)
 		free_page((unsigned long) link);
 
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 327177df03a5..f8aa54272121 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -408,28 +408,13 @@ static int ovl_create_or_link(struct dentry *dentry, int mode, dev_t rdev,
 		err = ovl_create_upper(dentry, inode, &stat, link, hardlink);
 	} else {
 		const struct cred *old_cred;
-		struct cred *override_cred;
 
-		err = -ENOMEM;
-		override_cred = prepare_creds();
-		if (!override_cred)
-			goto out_iput;
-
-		/*
-		 * CAP_SYS_ADMIN for setting opaque xattr
-		 * CAP_DAC_OVERRIDE for create in workdir, rename
-		 * CAP_FOWNER for removing whiteout from sticky dir
-		 */
-		cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
-		cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
-		cap_raise(override_cred->cap_effective, CAP_FOWNER);
-		old_cred = override_creds(override_cred);
+		old_cred = ovl_override_creds(dentry->d_sb);
 
 		err = ovl_create_over_whiteout(dentry, inode, &stat, link,
 					       hardlink);
 
 		revert_creds(old_cred);
-		put_cred(override_cred);
 	}
 
 	if (!err)
@@ -659,32 +644,11 @@ static int ovl_do_remove(struct dentry *dentry, bool is_dir)
 	if (OVL_TYPE_PURE_UPPER(type)) {
 		err = ovl_remove_upper(dentry, is_dir);
 	} else {
-		const struct cred *old_cred;
-		struct cred *override_cred;
-
-		err = -ENOMEM;
-		override_cred = prepare_creds();
-		if (!override_cred)
-			goto out_drop_write;
-
-		/*
-		 * CAP_SYS_ADMIN for setting xattr on whiteout, opaque dir
-		 * CAP_DAC_OVERRIDE for create in workdir, rename
-		 * CAP_FOWNER for removing whiteout from sticky dir
-		 * CAP_FSETID for chmod of opaque dir
-		 * CAP_CHOWN for chown of opaque dir
-		 */
-		cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
-		cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
-		cap_raise(override_cred->cap_effective, CAP_FOWNER);
-		cap_raise(override_cred->cap_effective, CAP_FSETID);
-		cap_raise(override_cred->cap_effective, CAP_CHOWN);
-		old_cred = override_creds(override_cred);
+		const struct cred *old_cred = ovl_override_creds(dentry->d_sb);
 
 		err = ovl_remove_and_whiteout(dentry, is_dir);
 
 		revert_creds(old_cred);
-		put_cred(override_cred);
 	}
 out_drop_write:
 	ovl_drop_write(dentry);
@@ -723,7 +687,6 @@ static int ovl_rename2(struct inode *olddir, struct dentry *old,
 	bool new_is_dir = false;
 	struct dentry *opaquedir = NULL;
 	const struct cred *old_cred = NULL;
-	struct cred *override_cred = NULL;
 
 	err = -EINVAL;
 	if (flags & ~(RENAME_EXCHANGE | RENAME_NOREPLACE))
@@ -792,26 +755,8 @@ static int ovl_rename2(struct inode *olddir, struct dentry *old,
 	old_opaque = !OVL_TYPE_PURE_UPPER(old_type);
 	new_opaque = !OVL_TYPE_PURE_UPPER(new_type);
 
-	if (old_opaque || new_opaque) {
-		err = -ENOMEM;
-		override_cred = prepare_creds();
-		if (!override_cred)
-			goto out_drop_write;
-
-		/*
-		 * CAP_SYS_ADMIN for setting xattr on whiteout, opaque dir
-		 * CAP_DAC_OVERRIDE for create in workdir
-		 * CAP_FOWNER for removing whiteout from sticky dir
-		 * CAP_FSETID for chmod of opaque dir
-		 * CAP_CHOWN for chown of opaque dir
-		 */
-		cap_raise(override_cred->cap_effective, CAP_SYS_ADMIN);
-		cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
-		cap_raise(override_cred->cap_effective, CAP_FOWNER);
-		cap_raise(override_cred->cap_effective, CAP_FSETID);
-		cap_raise(override_cred->cap_effective, CAP_CHOWN);
-		old_cred = override_creds(override_cred);
-	}
+	if (old_opaque || new_opaque)
+		old_cred = ovl_override_creds(old->d_sb);
 
 	if (overwrite && OVL_TYPE_MERGE_OR_LOWER(new_type) && new_is_dir) {
 		opaquedir = ovl_check_empty_and_clear(new);
@@ -942,10 +887,8 @@ out_dput_old:
 out_unlock:
 	unlock_rename(new_upperdir, old_upperdir);
 out_revert_creds:
-	if (old_opaque || new_opaque) {
+	if (old_opaque || new_opaque)
 		revert_creds(old_cred);
-		put_cred(override_cred);
-	}
 out_drop_write:
 	ovl_drop_write(old);
 out:
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 28316b292b8a..27a42975d7cd 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -150,6 +150,7 @@ void ovl_drop_write(struct dentry *dentry);
 bool ovl_dentry_is_opaque(struct dentry *dentry);
 void ovl_dentry_set_opaque(struct dentry *dentry, bool opaque);
 bool ovl_is_whiteout(struct dentry *dentry);
+const struct cred *ovl_override_creds(struct super_block *sb);
 void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry);
 struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
 			  unsigned int flags);
@@ -164,6 +165,8 @@ int ovl_check_empty_dir(struct dentry *dentry, struct list_head *list);
 void ovl_cleanup_whiteouts(struct dentry *upper, struct list_head *list);
 void ovl_cache_free(struct list_head *list);
 int ovl_check_d_type_supported(struct path *realpath);
+void ovl_workdir_cleanup(struct inode *dir, struct vfsmount *mnt,
+			 struct dentry *dentry, int level);
 
 /* inode.c */
 int ovl_setattr(struct dentry *dentry, struct iattr *attr);
diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index 0c59955c4653..da999e73c97a 100644
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -36,7 +36,8 @@ struct ovl_dir_cache {
 
 struct ovl_readdir_data {
 	struct dir_context ctx;
-	bool is_merge;
+	struct dentry *dentry;
+	bool is_lowest;
 	struct rb_root root;
 	struct list_head *list;
 	struct list_head middle;
@@ -140,9 +141,9 @@ static int ovl_cache_entry_add_rb(struct ovl_readdir_data *rdd,
 	return 0;
 }
 
-static int ovl_fill_lower(struct ovl_readdir_data *rdd,
-			  const char *name, int namelen,
-			  loff_t offset, u64 ino, unsigned int d_type)
+static int ovl_fill_lowest(struct ovl_readdir_data *rdd,
+			   const char *name, int namelen,
+			   loff_t offset, u64 ino, unsigned int d_type)
 {
 	struct ovl_cache_entry *p;
 
@@ -194,10 +195,10 @@ static int ovl_fill_merge(struct dir_context *ctx, const char *name,
 		container_of(ctx, struct ovl_readdir_data, ctx);
 
 	rdd->count++;
-	if (!rdd->is_merge)
+	if (!rdd->is_lowest)
 		return ovl_cache_entry_add_rb(rdd, name, namelen, ino, d_type);
 	else
-		return ovl_fill_lower(rdd, name, namelen, offset, ino, d_type);
+		return ovl_fill_lowest(rdd, name, namelen, offset, ino, d_type);
 }
 
 static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
@@ -206,17 +207,8 @@ static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
 	struct ovl_cache_entry *p;
 	struct dentry *dentry;
 	const struct cred *old_cred;
-	struct cred *override_cred;
-
-	override_cred = prepare_creds();
-	if (!override_cred)
-		return -ENOMEM;
 
-	/*
-	 * CAP_DAC_OVERRIDE for lookup
-	 */
-	cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
-	old_cred = override_creds(override_cred);
+	old_cred = ovl_override_creds(rdd->dentry->d_sb);
 
 	err = mutex_lock_killable(&dir->d_inode->i_mutex);
 	if (!err) {
@@ -232,7 +224,6 @@ static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
 		mutex_unlock(&dir->d_inode->i_mutex);
 	}
 	revert_creds(old_cred);
-	put_cred(override_cred);
 
 	return err;
 }
@@ -257,7 +248,7 @@ static inline int ovl_dir_read(struct path *realpath,
 			err = rdd->err;
 	} while (!err && rdd->count);
 
-	if (!err && rdd->first_maybe_whiteout)
+	if (!err && rdd->first_maybe_whiteout && rdd->dentry)
 		err = ovl_check_whiteouts(realpath->dentry, rdd);
 
 	fput(realfile);
@@ -288,9 +279,10 @@ static int ovl_dir_read_merged(struct dentry *dentry, struct list_head *list)
 	struct path realpath;
 	struct ovl_readdir_data rdd = {
 		.ctx.actor = ovl_fill_merge,
+		.dentry = dentry,
 		.list = list,
 		.root = RB_ROOT,
-		.is_merge = false,
+		.is_lowest = false,
 	};
 	int idx, next;
 
@@ -307,7 +299,7 @@ static int ovl_dir_read_merged(struct dentry *dentry, struct list_head *list)
 			 * allows offsets to be reasonably constant
 			 */
 			list_add(&rdd.middle, rdd.list);
-			rdd.is_merge = true;
+			rdd.is_lowest = true;
 			err = ovl_dir_read(&realpath, &rdd);
 			list_del(&rdd.middle);
 		}
@@ -618,3 +610,64 @@ int ovl_check_d_type_supported(struct path *realpath)
 
 	return rdd.d_type_supported;
 }
+
+static void ovl_workdir_cleanup_recurse(struct path *path, int level)
+{
+	int err;
+	struct inode *dir = path->dentry->d_inode;
+	LIST_HEAD(list);
+	struct ovl_cache_entry *p;
+	struct ovl_readdir_data rdd = {
+		.ctx.actor = ovl_fill_merge,
+		.dentry = NULL,
+		.list = &list,
+		.root = RB_ROOT,
+		.is_lowest = false,
+	};
+
+	err = ovl_dir_read(path, &rdd);
+	if (err)
+		goto out;
+
+	inode_lock_nested(dir, I_MUTEX_PARENT);
+	list_for_each_entry(p, &list, l_node) {
+		struct dentry *dentry;
+
+		if (p->name[0] == '.') {
+			if (p->len == 1)
+				continue;
+			if (p->len == 2 && p->name[1] == '.')
+				continue;
+		}
+		dentry = lookup_one_len(p->name, path->dentry, p->len);
+		if (IS_ERR(dentry))
+			continue;
+		if (dentry->d_inode)
+			ovl_workdir_cleanup(dir, path->mnt, dentry, level);
+		dput(dentry);
+	}
+	inode_unlock(dir);
+out:
+	ovl_cache_free(&list);
+}
+
+void ovl_workdir_cleanup(struct inode *dir, struct vfsmount *mnt,
+			 struct dentry *dentry, int level)
+{
+	int err;
+
+	if (!d_is_dir(dentry) || level > 1) {
+		ovl_cleanup(dir, dentry);
+		return;
+	}
+
+	err = ovl_do_rmdir(dir, dentry);
+	if (err) {
+		struct path path = { .mnt = mnt, .dentry = dentry };
+
+		inode_unlock(dir);
+		ovl_workdir_cleanup_recurse(&path, level + 1);
+		inode_lock_nested(dir, I_MUTEX_PARENT);
+		ovl_cleanup(dir, dentry);
+	}
+}
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 0035cb80ecd1..fa20c95bd456 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -42,6 +42,8 @@ struct ovl_fs {
 	long lower_namelen;
 	/* pathnames of lower and upper dirs, for show_options */
 	struct ovl_config config;
+	/* creds of process who forced instantiation of super block */
+	const struct cred *creator_cred;
 };
 
 struct ovl_dir_cache;
@@ -246,6 +248,13 @@ bool ovl_is_whiteout(struct dentry *dentry)
 	return inode && IS_WHITEOUT(inode);
 }
 
+const struct cred *ovl_override_creds(struct super_block *sb)
+{
+	struct ovl_fs *ofs = sb->s_fs_info;
+
+	return override_creds(ofs->creator_cred);
+}
+
 static bool ovl_is_opaquedir(struct dentry *dentry)
 {
 	int res;
@@ -587,6 +596,7 @@ static void ovl_put_super(struct super_block *sb)
 	kfree(ufs->config.lowerdir);
 	kfree(ufs->config.upperdir);
 	kfree(ufs->config.workdir);
+	put_cred(ufs->creator_cred);
 	kfree(ufs);
 }
 
@@ -774,7 +784,7 @@ retry:
 				goto out_dput;
 
 			retried = true;
-			ovl_cleanup(dir, work);
+			ovl_workdir_cleanup(dir, mnt, work, 0);
 			dput(work);
 			goto retry;
 		}
@@ -1107,10 +1117,14 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 	else
 		sb->s_d_op = &ovl_dentry_operations;
 
+	ufs->creator_cred = prepare_creds();
+	if (!ufs->creator_cred)
+		goto out_put_lower_mnt;
+
 	err = -ENOMEM;
 	oe = ovl_alloc_entry(numlower);
 	if (!oe)
-		goto out_put_lower_mnt;
+		goto out_put_cred;
 
 	root_dentry = d_make_root(ovl_new_inode(sb, S_IFDIR, oe));
 	if (!root_dentry)
@@ -1143,6 +1157,8 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 
 out_free_oe:
 	kfree(oe);
+out_put_cred:
+	put_cred(ufs->creator_cred);
 out_put_lower_mnt:
 	for (i = 0; i < ufs->numlower; i++)
 		mntput(ufs->lower_mnt[i]);
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 6ca00471afbf..d920a646b578 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -270,7 +270,7 @@ struct reiserfs_journal_list {
 
 	struct mutex j_commit_mutex;
 	unsigned int j_trans_id;
-	time_t j_timestamp;
+	time64_t j_timestamp; /* write-only but useful for crash dump analysis */
 	struct reiserfs_list_bitmap *j_list_bitmap;
 	struct buffer_head *j_commit_bh;	/* commit buffer head */
 	struct reiserfs_journal_cnode *j_realblock;