From: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Date: Wed, 8 May 2013 08:10:25 +0000 (+0000)
Subject: Btrfs: fix possible memory leak in the find_parent_nodes()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c16c2e2e51c2f0951fffa73c343b8fcb641108ba;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Btrfs: fix possible memory leak in the find_parent_nodes()

In the find_parent_nodes(), if read_tree_block() fails, we can
not return directly, we should free some allocated memory otherwise
memory leak happens.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index b4fb41558111..290e347b6db3 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -918,7 +918,8 @@ again:
 							   ref->parent, bsz, 0);
 				if (!eb || !extent_buffer_uptodate(eb)) {
 					free_extent_buffer(eb);
-					return -EIO;
+					ret = -EIO;
+					goto out;
 				}
 				ret = find_extent_in_eb(eb, bytenr,
 							*extent_item_pos, &eie);