From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57322 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938559AbdD3OOu (ORCPT ); Sun, 30 Apr 2017 10:14:50 -0400 Subject: Patch "net/packet: fix overflow in check for tp_reserve" has been added to the 3.18-stable tree To: andreyknvl@google.com, davem@davemloft.net, edumazet@google.com, gregkh@linuxfoundation.org Cc: , From: Date: Sun, 30 Apr 2017 16:11:13 +0200 Message-ID: <1493561473266@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 net/packet: fix overflow in check for tp_reserve 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: net-packet-fix-overflow-in-check-for-tp_reserve.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 foo@baz Sun Apr 30 15:50:51 CEST 2017 From: Andrey Konovalov Date: Wed, 29 Mar 2017 16:11:22 +0200 Subject: net/packet: fix overflow in check for tp_reserve From: Andrey Konovalov [ Upstream commit bcc5364bdcfe131e6379363f089e7b4108d35b70 ] When calculating po->tp_hdrlen + po->tp_reserve the result can overflow. Fix by checking that tp_reserve <= INT_MAX on assign. Signed-off-by: Andrey Konovalov Acked-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/packet/af_packet.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -3314,6 +3314,8 @@ packet_setsockopt(struct socket *sock, i return -EBUSY; if (copy_from_user(&val, optval, sizeof(val))) return -EFAULT; + if (val > INT_MAX) + return -EINVAL; po->tp_reserve = val; return 0; } Patches currently in stable-queue which might be from andreyknvl@google.com are queue-3.18/sctp-listen-on-the-sock-only-when-it-s-state-is-listening-or-closed.patch queue-3.18/net-packet-fix-overflow-in-check-for-tp_frame_nr.patch queue-3.18/net-packet-fix-overflow-in-check-for-tp_reserve.patch queue-3.18/ip6mr-fix-notification-device-destruction.patch