[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20160127180809.344915834@linuxfoundation.org>
Date: Wed, 27 Jan 2016 10:13:58 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Sasha Levin <sasha.levin@...cle.com>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.1 074/127] net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory
4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sasha Levin <sasha.levin@...cle.com>
[ Upstream commit 320f1a4a175e7cd5d3f006f92b4d4d3e2cbb7bb5 ]
proc_dostring() needs an initialized destination string, while the one
provided in proc_sctp_do_hmac_alg() contains stack garbage.
Thus, writing to cookie_hmac_alg would strlen() that garbage and end up
accessing invalid memory.
Fixes: 3c68198e7 ("sctp: Make hmac algorithm selection for cookie generation dynamic")
Signed-off-by: Sasha Levin <sasha.levin@...cle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
net/sctp/sysctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -320,7 +320,7 @@ static int proc_sctp_do_hmac_alg(struct
struct ctl_table tbl;
bool changed = false;
char *none = "none";
- char tmp[8];
+ char tmp[8] = {0};
int ret;
memset(&tbl, 0, sizeof(struct ctl_table));
Powered by blists - more mailing lists