From: Jeff Mahoney <jeffm@suse.com>
Date: Wed, 17 May 2017 13:49:37 +0000 (-0400)
Subject: btrfs: fix memory leak in update_space_info failure path
X-Git-Tag: v4.4.72~28
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5c7955c8726c1883e1577ed39d348c46a8c9bc7b;p=profile%2Fcommon%2Fplatform%2Fkernel%2Flinux-artik7.git

btrfs: fix memory leak in update_space_info failure path

commit 896533a7da929136d0432713f02a3edffece2826 upstream.

If we fail to add the space_info kobject, we'll leak the memory
for the percpu counter.

Fixes: 6ab0a2029c (btrfs: publish allocation data in sysfs)
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 2a2e370..c36a03f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3854,6 +3854,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
 				    info->space_info_kobj, "%s",
 				    alloc_name(found->flags));
 	if (ret) {
+		percpu_counter_destroy(&found->total_bytes_pinned);
 		kfree(found);
 		return ret;
 	}