Subject: [merged] jffs2-unlock-f-sem-on-error-in-jffs2_new_inode.patch removed from -mm tree
To: andy.wangguoli@xxxxxxxxxx,artem.bityutskiy@xxxxxxxxxxxxxxx,computersforpeace@xxxxxxxxx,dwmw2@xxxxxxxxxxxxx,stable@xxxxxxxxxxxxxxx,wangnan0@xxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 27 Feb 2014 12:24:04 -0800
The patch titled
Subject: jffs2: unlock f->sem on error in jffs2_new_inode()
has been removed from the -mm tree. Its filename was
jffs2-unlock-f-sem-on-error-in-jffs2_new_inode.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Wang Guoli <andy.wangguoli@xxxxxxxxxx>
Subject: jffs2: unlock f->sem on error in jffs2_new_inode()
If jffs2_new_inode() succeeds, it returns with f->sem held, and the caller
is responsible for releasing the lock. If it fails, it still returns with
the lock held, but the caller won't release the lock, which will lead to
deadlock.
Fix it by releasing the lock in jffs2_new_inode() on error.
Signed-off-by: Wang Guoli <andy.wangguoli@xxxxxxxxxx>
Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: Wang Guoli <andy.wangguoli@xxxxxxxxxx>
Cc: Brian Norris <computersforpeace@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 2.6.34+
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/jffs2/fs.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff -puN fs/jffs2/fs.c~jffs2-unlock-f-sem-on-error-in-jffs2_new_inode fs/jffs2/fs.c
--- a/fs/jffs2/fs.c~jffs2-unlock-f-sem-on-error-in-jffs2_new_inode
+++ a/fs/jffs2/fs.c
@@ -457,12 +457,14 @@ struct inode *jffs2_new_inode (struct in
The umask is only applied if there's no default ACL */
ret = jffs2_init_acl_pre(dir_i, inode, &mode);
if (ret) {
- make_bad_inode(inode);
- iput(inode);
- return ERR_PTR(ret);
+ mutex_unlock(&f->sem);
+ make_bad_inode(inode);
+ iput(inode);
+ return ERR_PTR(ret);
}
ret = jffs2_do_new_inode (c, f, mode, ri);
if (ret) {
+ mutex_unlock(&f->sem);
make_bad_inode(inode);
iput(inode);
return ERR_PTR(ret);
@@ -479,6 +481,7 @@ struct inode *jffs2_new_inode (struct in
inode->i_size = 0;
if (insert_inode_locked(inode) < 0) {
+ mutex_unlock(&f->sem);
make_bad_inode(inode);
iput(inode);
return ERR_PTR(-EINVAL);
_
Patches currently in -mm which might be from andy.wangguoli@xxxxxxxxxx are
linux-next.patch
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