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authorPavel Shilovsky <piastryyy@gmail.com>2010-04-21 19:44:24 +0000
committerSteve French <sfrench@us.ibm.com>2010-04-21 19:44:24 +0000
commit2c964d1f7c87eb71f7902111cd7c8fbba225e4b6 (patch)
tree926ea339b7731049c363411bfc87094566488f43 /fs/cifs
parentf19159dc5ab9ec28c3b8230689101335d98e2d68 (diff)
[CIFS] Fix losing locks during fork()
When process does fork() private_data of files with lock list stays the same for file descriptors of the parent and of the child. While finishing the child closes files and deletes locks from the list even if unlocking fails. When the child process finishes the parent doesn't have lock in lock list and can't unlock previously before fork() locked region after the child process finished. This patch provides behaviour to save locks in lock list if unlocking fails. Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Reviewed-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/file.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 99897e3562a7..2ba4c41be972 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -922,9 +922,10 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
1, 0, li->type, false);
if (stored_rc)
rc = stored_rc;
-
- list_del(&li->llist);
- kfree(li);
+ else {
+ list_del(&li->llist);
+ kfree(li);
+ }
}
}
mutex_unlock(&fid->lock_mutex);