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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,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 85DA2C432C0 for ; Mon, 2 Dec 2019 19:54:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 62CC2217D9 for ; Mon, 2 Dec 2019 19:54:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728174AbfLBTyC (ORCPT ); Mon, 2 Dec 2019 14:54:02 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:42221 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728112AbfLBTyB (ORCPT ); Mon, 2 Dec 2019 14:54:01 -0500 Received: by mail-il1-f198.google.com with SMTP id n79so665714ilh.9 for ; Mon, 02 Dec 2019 11:54:00 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=sYedtpyaMKG5whWJkf6dyBRhk3jwnlp5j6dMs2CqDFU=; b=PpwH+NCQBwXcGG2NoeOYl1pCfldRv5zcFm2OXcXfGSCpaSCHv5uokxc2kt5A2B8lYq qMiERZ6ZyxE1SQkhOpQlhpANuQMC9wYP0y6J+bw+JcAHwqQbbipNct7lpmXTSF5mSTXg Z7hQfRQR9amjnshCkXmPbW7NiIypCPwNOnyK7t/zFwXg+LVrHKDTGRkmiFS4BeHqDOxg O5nO+OULcKghRm1ic7sDEl2SHDhD2vPvcR0chF7RficjXtSHuWmcAO9jUL8BekuthwAs I3FC3NZc7hI3V77BCOUP9xPppLPWoPyAIKiYJ8FVbvnF6la1HnSAHXwqqUpj2u7KAK0D XXUg== X-Gm-Message-State: APjAAAX5VNDnwX1OhGwAMg4oi3LlMIclmiwCt2i9PkpFKFzn+k4LJ5Q9 9AeHpRx8jCd1bxNncS0EwPHqF0mcZrwjNMT/C5lI7BC32pIn X-Google-Smtp-Source: APXvYqwCsGxdE1Q39uMe3w+N7P34H3tGUIGjHKavf2twfv9j9z6nDvvs/vMFI7BQnMa0/lyn5/xB48hDQosPeU+CdJaN0K7ha/dE MIME-Version: 1.0 X-Received: by 2002:a02:b47:: with SMTP id 68mr1505294jad.49.1575316440400; Mon, 02 Dec 2019 11:54:00 -0800 (PST) Date: Mon, 02 Dec 2019 11:54:00 -0800 In-Reply-To: <000000000000a6324b0598b2eb59@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d6c9870598bdf090@google.com> Subject: Re: KASAN: slab-out-of-bounds Write in pipe_write From: syzbot To: dhowells@redhat.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot has bisected this bug to: commit a194dfe6e6f6f7205eea850a420f2bc6a1541209 Author: David Howells Date: Fri Sep 20 15:32:19 2019 +0000 pipe: Rearrange sequence in pipe_write() to preallocate slot bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16085abce00000 start commit: b94ae8ad Merge tag 'seccomp-v5.5-rc1' of git://git.kernel... git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=15085abce00000 console output: https://syzkaller.appspot.com/x/log.txt?x=11085abce00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ff560c3de405258c dashboard link: https://syzkaller.appspot.com/bug?extid=838eb0878ffd51f27c41 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=146a9f86e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1791d82ae00000 Reported-by: syzbot+838eb0878ffd51f27c41@syzkaller.appspotmail.com Fixes: a194dfe6e6f6 ("pipe: Rearrange sequence in pipe_write() to preallocate slot") For information about bisection process see: https://goo.gl/tpsmEJ#bisection