diff mbox

cifs: fix potential use-after-free in cifs_oplock_break_put

Message ID 1289402350-14218-1-git-send-email-jlayton@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Jeff Layton Nov. 10, 2010, 3:19 p.m. UTC 
None
diff mbox

Patch

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 06c3e83..b857ce5 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -2271,8 +2271,10 @@  void cifs_oplock_break_get(struct cifsFileInfo *cfile)
 
 void cifs_oplock_break_put(struct cifsFileInfo *cfile)
 {
+	struct super_block *sb = cfile->dentry->d_sb;
+
 	cifsFileInfo_put(cfile);
-	cifs_sb_deactive(cfile->dentry->d_sb);
+	cifs_sb_deactive(sb);
 }
 
 const struct address_space_operations cifs_addr_ops = {