Patch "Btrfs: fix memory leak in do_walk_down" has been added to the 4.4-stable tree

Patch "Btrfs: fix memory leak in do_walk_down" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    Btrfs: fix memory leak in do_walk_down

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     btrfs-fix-memory-leak-in-do_walk_down.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From a958eab0ed7fdc1b977bc25d3af6efedaa945488 Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@oracle.com>
Date: Tue, 13 Sep 2016 19:02:27 -0700
Subject: Btrfs: fix memory leak in do_walk_down

From: Liu Bo <bo.li.liu@oracle.com>

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 |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -8488,6 +8488,7 @@ static noinline int do_walk_down(struct
 				       &wc->flags[level - 1]);
 	if (ret < 0) {
 		btrfs_tree_unlock(next);
+		free_extent_buffer(next);
 		return ret;
 	}
 


Patches currently in stable-queue which might be from bo.li.liu@oracle.com are

queue-4.4/btrfs-fix-memory-leak-in-reading-btree-blocks.patch
queue-4.4/btrfs-bail-out-if-block-group-has-different-mixed-flag.patch
queue-4.4/btrfs-return-gracefully-from-balance-if-fs-tree-is-corrupted.patch
queue-4.4/btrfs-don-t-bug-during-drop-snapshot.patch
queue-4.4/btrfs-fix-memory-leak-in-do_walk_down.patch