linux-kernel - [12/68] rds: fix a leak of kernel memory

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Message-Id: <20100924163345.068328091@clark.site>
Date:	Fri, 24 Sep 2010 09:31:36 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Eric Dumazet <eric.dumazet@...il.com>,
	Andy Grover <andy.grover@...cle.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [12/68] rds: fix a leak of kernel memory

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------


From: Eric Dumazet <eric.dumazet@...il.com>

[ Upstream commit f037590fff3005ce8a1513858d7d44f50053cc8f ]

struct rds_rdma_notify contains a 32 bits hole on 64bit arches,
make sure it is zeroed before copying it to user.

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
CC: Andy Grover <andy.grover@...cle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 net/rds/recv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -296,7 +296,7 @@ static int rds_still_queued(struct rds_s
 int rds_notify_queue_get(struct rds_sock *rs, struct msghdr *msghdr)
 {
 	struct rds_notifier *notifier;
-	struct rds_rdma_notify cmsg;
+	struct rds_rdma_notify cmsg = { 0 }; /* fill holes with zero */
 	unsigned int count = 0, max_messages = ~0U;
 	unsigned long flags;
 	LIST_HEAD(copy);


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