commit 107800061996dc872a9fa72fb806ac9dadf2cb6b
author Liu Bo <bo.li.liu@oracle.com> Tue Sep 13 19:02:27 2016 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fri Jan 06 11:16:10 2017 +0100
tree ceead2af6788823e893374b6b3870c1ef78de5a6
parent 5a9b659edef60fb665786525528086b5df5e0e19

Btrfs: fix memory leak in do_walk_down

commit a958eab0ed7fdc1b977bc25d3af6efedaa945488 upstream.

The extent buffer 'next' needs to be free'd conditionally.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/btrfs/extent-tree.c

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 431364a..099645a 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8488,6 +8488,7 @@
 				       &wc->flags[level - 1]);
 	if (ret < 0) {
 		btrfs_tree_unlock(next);
+		free_extent_buffer(next);
 		return ret;
 	}