linux-kernel - [PATCH] BTRFS: Fix mem leak in btrfs_submit

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Date:	Sun, 13 Mar 2011 21:49:18 +0100 (CET)
From:	Jesper Juhl <jj@...osbits.net>
To:	linux-btrfs@...r.kernel.org
cc:	linux-kernel@...r.kernel.org, Chris Mason <chris.mason@...cle.com>
Subject: [PATCH] BTRFS: Fix mem leak in btrfs_submit_direct()

When memory is low and the allocation for 'dip->csums' fail in 
fs/btrfs/inode.c:btrfs_submit_direct() we make the situation worse by 
leaking the memory allocated to 'dip'.
This patch removes the leak by kfree()'ing 'dip' before jumping to the 
'free_ordered' label.

Signed-off-by: Jesper Juhl <jj@...osbits.net>
---
 inode.c |    1 +
 1 file changed, 1 insertion(+)

 compile tested only.

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 0efdb65..53f4c8e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -6056,6 +6056,7 @@ static void btrfs_submit_direct(int rw, struct bio *bio, struct inode *inode,
 	if (!skip_sum) {
 		dip->csums = kmalloc(sizeof(u32) * bio->bi_vcnt, GFP_NOFS);
 		if (!dip->csums) {
+			kfree(dip);
 			ret = -ENOMEM;
 			goto free_ordered;
 		}


-- 
Jesper Juhl <jj@...osbits.net>            http://www.chaosbits.net/
Plain text mails only, please.
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