From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40492 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751567AbeDCQn5 (ORCPT ); Tue, 3 Apr 2018 12:43:57 -0400 Subject: Patch "xfrm: Refuse to insert 32 bit userspace socket policies on 64 bit systems" has been added to the 3.18-stable tree To: steffen.klassert@secunet.com, gregkh@linuxfoundation.org Cc: , From: Date: Tue, 03 Apr 2018 18:43:47 +0200 Message-ID: <152277382713772@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled xfrm: Refuse to insert 32 bit userspace socket policies on 64 bit systems to the 3.18-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: xfrm-refuse-to-insert-32-bit-userspace-socket-policies-on-64-bit-systems.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 19d7df69fdb2636856dc8919de72fc1bf8f79598 Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Thu, 1 Feb 2018 08:49:23 +0100 Subject: xfrm: Refuse to insert 32 bit userspace socket policies on 64 bit systems From: Steffen Klassert commit 19d7df69fdb2636856dc8919de72fc1bf8f79598 upstream. We don't have a compat layer for xfrm, so userspace and kernel structures have different sizes in this case. This results in a broken configuration, so refuse to configure socket policies when trying to insert from 32 bit userspace as we do it already with policies inserted via netlink. Reported-and-tested-by: syzbot+e1a1577ca8bcb47b769a@syzkaller.appspotmail.com Signed-off-by: Steffen Klassert [use is_compat_task() - gregkh] Signed-off-by: Greg Kroah-Hartman --- net/xfrm/xfrm_state.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1845,6 +1845,11 @@ int xfrm_user_policy(struct sock *sk, in struct xfrm_mgr *km; struct xfrm_policy *pol = NULL; +#ifdef CONFIG_COMPAT + if (is_compat_task()) + return -EOPNOTSUPP; +#endif + if (!optval && !optlen) { xfrm_sk_policy_insert(sk, XFRM_POLICY_IN, NULL); xfrm_sk_policy_insert(sk, XFRM_POLICY_OUT, NULL); Patches currently in stable-queue which might be from steffen.klassert@secunet.com are queue-3.18/xfrm_user-uncoditionally-validate-esn-replay-attribute-struct.patch queue-3.18/xfrm-refuse-to-insert-32-bit-userspace-socket-policies-on-64-bit-systems.patch queue-3.18/net-xfrm-use-preempt-safe-this_cpu_read-in-ipcomp_alloc_tfms.patch