linux-kernel - [PATCH 3.12 76/88] rds: fix an infoleak in rds_inc_info

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Date:	Thu, 14 Jul 2016 10:16:08 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Kangjie Lu <kangjielu@...il.com>,
	Kangjie Lu <kjlu@...ech.edu>,
	"David S . Miller" <davem@...emloft.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 76/88] rds: fix an infoleak in rds_inc_info_copy

From: Kangjie Lu <kangjielu@...il.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 4116def2337991b39919f3b448326e21c40e0dbb upstream.

The last field "flags" of object "minfo" is not initialized.
Copying this object out may leak kernel stack data.
Assign 0 to it to avoid leak.

Signed-off-by: Kangjie Lu <kjlu@...ech.edu>
Acked-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/rds/recv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/rds/recv.c b/net/rds/recv.c
index de339b24ca14..917f36af8d37 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -544,5 +544,7 @@ void rds_inc_info_copy(struct rds_incoming *inc,
 		minfo.fport = inc->i_hdr.h_dport;
 	}
 
+	minfo.flags = 0;
+
 	rds_info_copy(iter, &minfo, sizeof(minfo));
 }
-- 
2.9.1