From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E68BC43381 for ; Sat, 16 Mar 2019 16:23:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 007EF218E0 for ; Sat, 16 Mar 2019 16:23:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727054AbfCPQXB (ORCPT ); Sat, 16 Mar 2019 12:23:01 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34644 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726435AbfCPQXB (ORCPT ); Sat, 16 Mar 2019 12:23:01 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B6FED3083394; Sat, 16 Mar 2019 16:23:00 +0000 (UTC) Received: from elisabeth (ovpn-200-27.brq.redhat.com [10.40.200.27]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7AE3B5C207; Sat, 16 Mar 2019 16:22:54 +0000 (UTC) Date: Sat, 16 Mar 2019 17:22:43 +0100 From: Stefano Brivio To: Dmitry Vyukov Cc: syzbot , David Miller , =?UTF-8?B?RnLDqWTDqXJpYw==?= Weisbecker , Alexey Kuznetsov , LKML , Ingo Molnar , netdev , Sabrina Dubroca , syzkaller-bugs , Thomas Gleixner , Hideaki YOSHIFUJI , Eric Dumazet Subject: Re: KASAN: slab-out-of-bounds Read in tick_sched_handle Message-ID: <20190316172243.0bfab727@elisabeth> In-Reply-To: References: <000000000000551b80057d31a5f7@google.com> <00000000000093e58e0584374110@google.com> <20190316165241.2855f966@elisabeth> Organization: Red Hat MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Sat, 16 Mar 2019 16:23:00 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 16 Mar 2019 17:07:13 +0100 Dmitry Vyukov wrote: > On Sat, Mar 16, 2019 at 4:53 PM Stefano Brivio wrote: > > > > On Sat, 16 Mar 2019 07:49:01 -0700 > > syzbot wrote: > > > > > syzbot has bisected this bug to: > > > > > > commit b8a51b38e4d4dec3e379d52c0fe1a66827f7cf1e > > > Author: Stefano Brivio > > > Date: Thu Nov 8 11:19:23 2018 +0000 > > > > > > fou, fou6: ICMP error handlers for FoU and GUE > > > > > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16f943e7200000 > > > start commit: b8a51b38 fou, fou6: ICMP error handlers for FoU and GUE > > > git tree: upstream > > > final crash: https://syzkaller.appspot.com/x/report.txt?x=15f943e7200000 > > > console output: https://syzkaller.appspot.com/x/log.txt?x=11f943e7200000 > > > kernel config: https://syzkaller.appspot.com/x/.config?x=b05cfdb4ee8ab9b2 > > > dashboard link: https://syzkaller.appspot.com/bug?extid=09d51a30df9fe76edb2a > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17359fab400000 > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=154a2a37400000 > > > > > > Reported-by: syzbot+09d51a30df9fe76edb2a@syzkaller.appspotmail.com > > > Fixes: b8a51b38 ("fou, fou6: ICMP error handlers for FoU and GUE") > > > > Might be fixed by bc6e019b6ee6 ("fou: Prevent unbounded recursion in GUE > > error handler also with UDP-Lite"), testing/checking now. > > Yes, most likely it is. The bug was just never closed as fixed. But > the last crash happened 2 months ago. > So I would say we just mark this as fixed: > > #syz fix: > fou: Prevent unbounded recursion in GUE error handler also with UDP-Lite Confirmed by testing, too. > Next after root cause bisection is fix bisection, so this part will be > automated to some degree as well. Nice, thanks for doing that. -- Stefano