From: <gregkh@linuxfoundation.org>
To: sasha.levin@oracle.com, davem@davemloft.net, gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory" has been added to the 4.4-stable tree
Date: Tue, 26 Jan 2016 22:30:18 -0800 [thread overview]
Message-ID: <1453876218238251@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-sctp-prevent-writes-to-cookie_hmac_alg-from-accessing-invalid-memory.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Tue Jan 26 21:31:27 PST 2016
From: Sasha Levin <sasha.levin@oracle.com>
Date: Thu, 7 Jan 2016 14:52:43 -0500
Subject: net: sctp: prevent writes to cookie_hmac_alg from accessing invalid memory
From: Sasha Levin <sasha.levin@oracle.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@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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));
Patches currently in stable-queue which might be from sasha.levin@oracle.com are
queue-4.4/net-sctp-prevent-writes-to-cookie_hmac_alg-from-accessing-invalid-memory.patch
reply other threads:[~2016-01-27 6:37 UTC|newest]
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