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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EBDEEC433ED for ; Mon, 17 May 2021 09:22:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C444A611BF for ; Mon, 17 May 2021 09:22:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235899AbhEQJX5 (ORCPT ); Mon, 17 May 2021 05:23:57 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:33603 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235848AbhEQJXh (ORCPT ); Mon, 17 May 2021 05:23:37 -0400 Received: by mail-il1-f198.google.com with SMTP id l6-20020a056e021c06b02901b9680ed93eso5884993ilh.0 for ; Mon, 17 May 2021 02:22:21 -0700 (PDT) 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:message-id:subject:from:to; bh=yAxZuY0U2cxZ6bvTIN15+rDW7/ewWTfpsgQL4WqX9ms=; b=EyQb5SRPvuJPqpIpDseUtk0YAFduoMN5v/vmD8BmXsydOHnUL9wR7BE5J/PK0J0lck zRM0byRz8ofiwdfOgnQNY3K0IHM4/rXhURx4vmtIzMLIw/t7npDjbeOH6mpEkF3FzLcy 2+3isYVoM7nRI3xFJz/LK+40VcPAW2EaFonp+3IotDPF5TPRgNyBkI4uwz271VcOK/xU aXIUmoHpVPy1FbWBN43Y7DoQArmeTQlsrAp6BcOSAvcHeqt+t9ohcjx93kjW5Fyke8Uu 9JbGtWUMzLayU5MRvsRLHS+l0Ga7nfiQIrOB73ny5xwEv8u3JqOpQxzvw0dK/yoGWOlj Z8Cg== X-Gm-Message-State: AOAM533I33I+KYExpeGYycIKL+FNgTNVQL3IqgzJhg0gNXaZ8yoaaDVB GD+aVOnOEs+hn7olw4szYJcQUKUhXfuobmjmPKrLb1lpptLG X-Google-Smtp-Source: ABdhPJz9CSKyRhbSWSGpLb9XVQ1yIkEjwHD/sYkpDiMuvDyxrAiq7P40TolPjqHSvE1+eWqnUJU+pDiyQsagwDZy1gw3qyMrL/5c MIME-Version: 1.0 X-Received: by 2002:a5d:9d47:: with SMTP id k7mr4108138iok.79.1621243340702; Mon, 17 May 2021 02:22:20 -0700 (PDT) Date: Mon, 17 May 2021 02:22:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006acb3105c28321f7@google.com> Subject: [syzbot] BUG: unable to handle kernel paging request in corrupted (3) From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 88b06399 Merge tag 'for-5.13-rc1-part2-tag' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11aa7a65d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=807beec6b4d66bf1 dashboard link: https://syzkaller.appspot.com/bug?extid=a84b8783366ecb1c65d0 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16a031b3d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12fc54fdd00000 The issue was bisected to: commit ea6a693d862d4f0edd748a1fa3fc6faf2c39afb2 Author: Jens Axboe Date: Thu Apr 15 15:47:13 2021 +0000 io_uring: disable multishot poll for double poll add cases bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=104b5795d00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=124b5795d00000 console output: https://syzkaller.appspot.com/x/log.txt?x=144b5795d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a84b8783366ecb1c65d0@syzkaller.appspotmail.com Fixes: ea6a693d862d ("io_uring: disable multishot poll for double poll add cases") BUG: unable to handle page fault for address: ffffffffc1defce0 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD bc8f067 P4D bc8f067 PUD bc91067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8479 Comm: iou-wrk-8440 Not tainted 5.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0xffffffffc1defce0 Code: Unable to access opcode bytes at RIP 0xffffffffc1defcb6. RSP: 0018:ffffc9000161f8f8 EFLAGS: 00010246 RAX: ffffffffc1defce0 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880187eb8c0 RBP: ffff8880187eb8c0 R08: 0000000000000000 R09: 0000000000002000 R10: ffffffff81df1723 R11: 0000000000004000 R12: 0000000000000000 R13: ffff8880187eb918 R14: ffff8880187eb900 R15: ffffffffc1defce0 FS: 0000000001212300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffc1defcb6 CR3: 00000000139d9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: CR2: ffffffffc1defce0 ---[ end trace a41da77ef833bc79 ]--- RIP: 0010:0xffffffffc1defce0 Code: Unable to access opcode bytes at RIP 0xffffffffc1defcb6. RSP: 0018:ffffc9000161f8f8 EFLAGS: 00010246 RAX: ffffffffc1defce0 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880187eb8c0 RBP: ffff8880187eb8c0 R08: 0000000000000000 R09: 0000000000002000 R10: ffffffff81df1723 R11: 0000000000004000 R12: 0000000000000000 R13: ffff8880187eb918 R14: ffff8880187eb900 R15: ffffffffc1defce0 FS: 0000000001212300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffc1defcb6 CR3: 00000000139d9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches