[PATCH] Fix oops in vfs_quotaon_mount()
When quota file specified in mount options did not exist, we tried to
dereference NULL pointer later. Fix it.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/dquot.c b/fs/dquot.c
index 05b6028..2a62b3d 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -1513,10 +1513,16 @@
if (IS_ERR(dentry))
return PTR_ERR(dentry);
+ if (!dentry->d_inode) {
+ error = -ENOENT;
+ goto out;
+ }
+
error = security_quota_on(dentry);
if (!error)
error = vfs_quota_on_inode(dentry->d_inode, type, format_id);
+out:
dput(dentry);
return error;
}