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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41DECC433F5 for ; Fri, 13 May 2022 01:13:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376300AbiEMBNK (ORCPT ); Thu, 12 May 2022 21:13:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241655AbiEMBNJ (ORCPT ); Thu, 12 May 2022 21:13:09 -0400 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97C4A222C28 for ; Thu, 12 May 2022 18:13:08 -0700 (PDT) Received: by mail-io1-f71.google.com with SMTP id t1-20020a056602140100b0065393cc1dc3so4039470iov.5 for ; Thu, 12 May 2022 18:13:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=eUXlZRRWqWJeVNbzS1bUZMqw+XLq1Ya2CWkXg+H4K7M=; b=FRNofzwoyGyzV7hS0grtH0kfAsAK5WQ08OJPHvgMKRn3BxbM5PtDdTmAQXEQRWDex8 pXawXItj5T7AOSHGRI0udOyp3BxcRx+201YSJL7vsf5VEu/CJ95oOBUjqBCz5SiUqciQ oB5VjMDjyssaP4FE+lY9Ckabac9qc56xPbj+6O21FRDlLskBjzB8qQbOMZXQKbmsz77f t17W8/zA/+ID23EvI67RC1+BLJXdM0YpUO8j04Yvqk96Jt+Ck0vY54b34G/bcf1GC930 Ps2sOswjZBV2FnoBpYjJrJ+Ip/46J46QTBZz2nOq+t8iMEXnqlL1WmGofifTSyKgLCbd bFNg== X-Gm-Message-State: AOAM532Ti9gMvVQAzsjmFbFoIVyexMXukgmACUpkA7jhG9P9TnE6XBQO Ds69/g+S3+vN9Z3KEuVl0Mq4g4tOVh01goAOq2fS4rAeoNwM X-Google-Smtp-Source: ABdhPJwEwZtIN8NhhD/fHwNeTBgHW63SLd1vEX6YrIqvoAOZP0GB242kidijQKRELxiUGhbx+xyHNgyEBAeFVAtSXiabk98omDxW MIME-Version: 1.0 X-Received: by 2002:a6b:3f05:0:b0:65a:431a:30cf with SMTP id m5-20020a6b3f05000000b0065a431a30cfmr1250181ioa.117.1652404387949; Thu, 12 May 2022 18:13:07 -0700 (PDT) Date: Thu, 12 May 2022 18:13:07 -0700 In-Reply-To: <0000000000005f1a8805ded719cc@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000091b7f505deda6057@google.com> Subject: Re: [syzbot] UBSAN: shift-out-of-bounds in tcf_pedit_init From: syzbot To: davem@davemloft.net, edumazet@google.com, geliang.tang@suse.com, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, mathew.j.martineau@linux.intel.com, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has bisected this issue to: commit 8b796475fd7882663a870456466a4fb315cc1bd6 Author: Paolo Abeni Date: Tue May 10 14:57:34 2022 +0000 net/sched: act_pedit: really ensure the skb is writable bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=158d3969f00000 start commit: 810c2f0a3f86 mlxsw: Avoid warning during ip6gre device rem.. git tree: net final oops: https://syzkaller.appspot.com/x/report.txt?x=178d3969f00000 console output: https://syzkaller.appspot.com/x/log.txt?x=138d3969f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=331feb185f8828e0 dashboard link: https://syzkaller.appspot.com/bug?extid=8ed8fc4c57e9dcf23ca6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=104e9749f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15f913b9f00000 Reported-by: syzbot+8ed8fc4c57e9dcf23ca6@syzkaller.appspotmail.com Fixes: 8b796475fd78 ("net/sched: act_pedit: really ensure the skb is writable") For information about bisection process see: https://goo.gl/tpsmEJ#bisection