linux-kernel - [PATCH 2/5] fs: charge pipe buffers to memcg

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Message-ID: <94f055dc719129a26149b0f8b22af7c61a3fb4e6.1443262808.git.vdavydov@parallels.com>
Date:	Sat, 26 Sep 2015 13:45:54 +0300
From:	Vladimir Davydov <vdavydov@...allels.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...nel.org>, Tejun Heo <tj@...nel.org>,
	<linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/5] fs: charge pipe buffers to memcg

Pipe buffers can be generated unrestrictedly by an unprivileged
userspace process, so they shouldn't go unaccounted.

Signed-off-by: Vladimir Davydov <vdavydov@...allels.com>
---
 fs/pipe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/pipe.c b/fs/pipe.c
index 8865f7963700..6880884b70b0 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -400,7 +400,7 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
 			int copied;
 
 			if (!page) {
-				page = alloc_page(GFP_HIGHUSER);
+				page = alloc_kmem_pages(GFP_HIGHUSER, 0);
 				if (unlikely(!page)) {
 					ret = ret ? : -ENOMEM;
 					break;
-- 
2.1.4

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