From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Brivio Subject: [PATCH net v2 0/2] Fix slab out-of-bounds on insufficient headroom for IPv6 packets Date: Thu, 6 Dec 2018 19:30:35 +0100 Message-ID: Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: Jianlin Shi , Hangbin Liu , Eric Dumazet , Stephen Hemminger , netdev@vger.kernel.org To: "David S. Miller" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:56704 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725922AbeLFSax (ORCPT ); Thu, 6 Dec 2018 13:30:53 -0500 Sender: netdev-owner@vger.kernel.org List-ID: Patch 1/2 fixes a slab out-of-bounds occurring with short SCTP packets over IPv4 over L2TP over IPv6 on a configuration with relatively low HEADER_MAX. Patch 2/2 makes sure we avoid writing before the allocated buffer in neigh_hh_output() in case the headroom is enough for the unaligned hardware header size, but not enough for the aligned one, and that we warn if we hit this condition. Stefano Brivio (2): ipv6: Check available headroom in ip6_xmit() even without options neighbour: Avoid writing before skb->head in neigh_hh_output() include/net/neighbour.h | 28 ++++++++++++++++++++++----- net/ipv6/ip6_output.c | 42 ++++++++++++++++++++--------------------- 2 files changed, 44 insertions(+), 26 deletions(-) -- 2.19.2