Subject: + jffs2-unlock-f-sem-on-error-in-jffs2_new_inode.patch added to -mm
tree
To:
[email protected],[email protected],[email protected],[email protected],[email protected]
From: [email protected]
Date: Fri, 27 Dec 2013 14:36:31 -0800
The patch titled
Subject: jffs2: unlock f->sem on error in jffs2_new_inode()
has been added to the -mm tree. Its filename is
jffs2-unlock-f-sem-on-error-in-jffs2_new_inode.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/jffs2-unlock-f-sem-on-error-in-jffs2_new_inode.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/jffs2-unlock-f-sem-on-error-in-jffs2_new_inode.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Wang Guoli <[email protected]>
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 <[email protected]>
Signed-off-by: Wang Nan <[email protected]>
Cc: Artem Bityutskiy <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Wang Guoli <[email protected]>
Cc: <[email protected]> # 2.6.34+
Signed-off-by: Andrew Morton <[email protected]>
---
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
@@ -456,12 +456,14 @@ 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);
@@ -478,6 +480,7 @@ 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 [email protected] are
jffs2-unlock-f-sem-on-error-in-jffs2_new_inode.patch
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