sunrpc/cache: fix module refcnt leak in a failure path

Don't forget to release the module refcnt if seq_open() returns failure.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: J. Bruce Fields <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 3e1ef8bf4dc2..a3f340c8b79a 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -1244,8 +1244,10 @@ static int content_open(struct inode *inode, struct file *file,
         if (!cd || !try_module_get(cd->owner))
                 return -EACCES;
         han = __seq_open_private(file, &cache_content_op, sizeof(*han));
-        if (han == NULL)
+        if (han == NULL) {
+                module_put(cd->owner);
                 return -ENOMEM;
+        }
 
         han->cd = cd;
         return 0;