linux-kernel - [PATCH 4.4 157/192] rds: fix an infoleak in rds_inc_info

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Date:   Mon, 12 Sep 2016 19:01:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kangjie Lu <kjlu@...ech.edu>,
        Santosh Shilimkar <santosh.shilimkar@...cle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Juerg Haefliger <juerg.haefliger@....com>
Subject: [PATCH 4.4 157/192] rds: fix an infoleak in rds_inc_info_copy

4.4-stable 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: Juerg Haefliger <juerg.haefliger@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/rds/recv.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -545,5 +545,7 @@ 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));
 }