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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-10 16:35:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-10 16:35:06 -0800
commit01504f5e9e071f1dde1062e3be15f54d4555308f (patch)
treec3878baa9897805711ca9d711d5947bf207ae0b5 /fs/ubifs/xattr.c
parent4bde961e5245bb37dab4831107bbed23e433d55a (diff)
parent8c1c5f263833ec2dc8fd716cf4281265c485d7ad (diff)
Merge tag 'upstream-4.4-rc1' of git://git.infradead.org/linux-ubifs
Pull UBI/UBIFS updates from Richard Weinberger: - access time support for UBIFS by Dongsheng Yang - random cleanups and bug fixes all over the place * tag 'upstream-4.4-rc1' of git://git.infradead.org/linux-ubifs: ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs ubifs: make ubifs_[get|set]xattr atomic UBIFS: Delete unnecessary checks before the function call "iput" UBI: Remove in vain semicolon UBI: Fastmap: Fix PEB array type UBIFS: Fix possible memory leak in ubifs_readdir() fs/ubifs: remove unnecessary new_valid_dev check ubi: fastmap: Implement produce_free_peb() UBIFS: print verbose message when rescanning a corrupted node UBIFS: call dbg_is_power_cut() instead of reading c->dbg->pc_happened UBI: drop null test before destroy functions UBI: Update comments to reflect UBI_METAONLY flag UBI: Fix debug message UBI: Fix typo in comment UBI: Fastmap: Simplify expression UBIFS: fix a typo in comment of ubifs_budget_req UBIFS: use kmemdup rather than duplicating its implementation
Diffstat (limited to 'fs/ubifs/xattr.c')
-rw-r--r--fs/ubifs/xattr.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index fd65b3f1923c..259fbabf143d 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -200,6 +200,7 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
int err;
struct ubifs_inode *host_ui = ubifs_inode(host);
struct ubifs_inode *ui = ubifs_inode(inode);
+ void *buf = NULL;
struct ubifs_budget_req req = { .dirtied_ino = 2,
.dirtied_ino_d = ALIGN(size, 8) + ALIGN(host_ui->data_len, 8) };
@@ -208,14 +209,17 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
if (err)
return err;
- kfree(ui->data);
- ui->data = kmemdup(value, size, GFP_NOFS);
- if (!ui->data) {
+ buf = kmemdup(value, size, GFP_NOFS);
+ if (!buf) {
err = -ENOMEM;
goto out_free;
}
+ mutex_lock(&ui->ui_mutex);
+ kfree(ui->data);
+ ui->data = buf;
inode->i_size = ui->ui_size = size;
ui->data_len = size;
+ mutex_unlock(&ui->ui_mutex);
mutex_lock(&host_ui->ui_mutex);
host->i_ctime = ubifs_current_time(host);
@@ -409,6 +413,7 @@ ssize_t ubifs_getxattr(struct dentry *dentry, const char *name, void *buf,
ubifs_assert(inode->i_size == ui->data_len);
ubifs_assert(ubifs_inode(host)->xattr_size > ui->data_len);
+ mutex_lock(&ui->ui_mutex);
if (buf) {
/* If @buf is %NULL we are supposed to return the length */
if (ui->data_len > size) {
@@ -423,6 +428,7 @@ ssize_t ubifs_getxattr(struct dentry *dentry, const char *name, void *buf,
err = ui->data_len;
out_iput:
+ mutex_unlock(&ui->ui_mutex);
iput(inode);
out_unlock:
kfree(xent);