From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 2 Sep 2012 13:44:51 +0000 (-0600)
Subject: Btrfs: fix possible memory leak in scrub_setup_recheck_block()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cf93dccea67ad8f5e0d9163c6a0a584550bbd7cd;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Btrfs: fix possible memory leak in scrub_setup_recheck_block()

bbio has been malloced in btrfs_map_block() and should be
freed before leaving from the error handling cases.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
---

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index b223620cd5a6..4e9eafe01c55 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1029,6 +1029,7 @@ static int scrub_setup_recheck_block(struct scrub_dev *sdev,
 				spin_lock(&sdev->stat_lock);
 				sdev->stat.malloc_errors++;
 				spin_unlock(&sdev->stat_lock);
+				kfree(bbio);
 				return -ENOMEM;
 			}
 			sblock->page_count++;