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-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=896533a7da929136d0432713f02a3edffece2826;p=openwrt%2Fstaging%2Fblogic.git

btrfs: fix memory leak in update_space_info failure path

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)
Cc: <stable@vger.kernel.org> # v3.14+
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>
---

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index e390451c72e6..27ca5b81ed22 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3993,6 +3993,7 @@ 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;
 	}