From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vk0-f70.google.com (mail-vk0-f70.google.com [209.85.213.70]) by kanga.kvack.org (Postfix) with ESMTP id C22B66B029E for ; Tue, 6 Feb 2018 14:16:54 -0500 (EST) Received: by mail-vk0-f70.google.com with SMTP id n135so1656346vke.9 for ; Tue, 06 Feb 2018 11:16:54 -0800 (PST) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id m18sor2773995uab.288.2018.02.06.11.16.53 for (Google Transport Security); Tue, 06 Feb 2018 11:16:53 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: <94eb2c0efc1ede1c4205648e8a49@google.com> From: Kees Cook Date: Wed, 7 Feb 2018 06:16:51 +1100 Message-ID: Subject: Re: WARNING: bad usercopy in put_cmsg Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: Dmitry Vyukov Cc: syzbot , keun-o.park@darkmatter.ae, Laura Abbott , LKML , Linux-MM , Mark Rutland , Ingo Molnar , syzkaller-bugs@googlegroups.com On Wed, Feb 7, 2018 at 4:33 AM, Dmitry Vyukov wrote: > On Tue, Feb 6, 2018 at 6:31 PM, syzbot > wrote: >> Hello, >> >> syzbot hit the following crash on upstream commit >> e237f98a9c134c3d600353f21e07db915516875b (Mon Feb 5 21:35:56 2018 +0000) >> Merge tag 'xfs-4.16-merge-5' of >> git://git.kernel.org/pub/scm/fs/xfs/xfs-linux >> >> So far this crash happened 8 times on net-next, upstream. >> C reproducer is attached. >> syzkaller reproducer is attached. >> Raw console output is attached. >> compiler: gcc (GCC) 7.1.1 20170620 >> .config is attached. > > #syz dup: WARNING in usercopy_warn > > Let's make that one the main copy, since Kees is already looking at it. This one has a more descriptive subject, can we dup towards this one? Whatever the case, yup, still working on it. -Kees -- Kees Cook Pixel Security -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org