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| author | Pavel Shilovsky <piastry@etersoft.ru> | 2012-11-22 18:56:39 +0400 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2012-12-05 13:27:29 -0600 |
| commit | 21cb2d90c76cbc951da3a266f0dd439d64f3114a (patch) | |
| tree | b38829c87f5be4c9da6c2bfdb11fd5a7ec4e98fb /fs/cifs | |
| parent | f152fd5fffa78910c467b17f12d0aa060aa408a6 (diff) | |
| download | linux-stable-21cb2d90c76cbc951da3a266f0dd439d64f3114a.tar.gz linux-stable-21cb2d90c76cbc951da3a266f0dd439d64f3114a.tar.bz2 linux-stable-21cb2d90c76cbc951da3a266f0dd439d64f3114a.zip | |
CIFS: Fix lock consistensy bug in cifs_setlk
If we netogiate mandatory locking style, have a read lock and try
to set a write lock we end up with a write lock in vfs cache and
no lock in cifs lock cache - that's wrong. Fix it by returning
from cifs_setlk immediately if a error occurs during setting a lock.
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/file.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 67fe0b811f23..bceffa8c034e 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -1443,16 +1443,18 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, return -ENOMEM; rc = cifs_lock_add_if(cfile, lock, wait_flag); - if (rc < 0) + if (rc < 0) { kfree(lock); - if (rc <= 0) + return rc; + } + if (!rc) goto out; rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, type, 1, 0, wait_flag); if (rc) { kfree(lock); - goto out; + return rc; } cifs_lock_add(cfile, lock); |