linux-kernel - [PATCH 3.2 92/94] rds: fix an infoleak in rds_inc_info

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Message-ID: <lsq.1471110178.204469760@decadent.org.uk>
Date:	Sat, 13 Aug 2016 18:42:58 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Kangjie Lu" <kangjielu@...il.com>,
	"Santosh Shilimkar" <santosh.shilimkar@...cle.com>,
	"Kangjie Lu" <kjlu@...ech.edu>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.2 92/94] rds: fix an infoleak in rds_inc_info_copy

3.2.82-rc1 review patch.  If anyone has any objections, please let me know.

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

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

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: Ben Hutchings <ben@...adent.org.uk>
---
 net/rds/recv.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -544,5 +544,7 @@ void rds_inc_info_copy(struct rds_incomi
 		minfo.fport = inc->i_hdr.h_dport;
 	}
 
+	minfo.flags = 0;
+
 	rds_info_copy(iter, &minfo, sizeof(minfo));
 }