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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 68A6EC433E0 for ; Wed, 13 Jan 2021 10:38:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 24ED3233F7 for ; Wed, 13 Jan 2021 10:38:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727364AbhAMKh4 (ORCPT ); Wed, 13 Jan 2021 05:37:56 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:47264 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id 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X-Received: by 2002:a6b:9346:: with SMTP id v67mr1054121iod.108.1610534235432; Wed, 13 Jan 2021 02:37:15 -0800 (PST) Date: Wed, 13 Jan 2021 02:37:15 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000006c2105b8c5b9b9@google.com> Subject: general protection fault in io_disable_sqo_submit From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, 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" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 7c53f6b6 Linux 5.11-rc3 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1606a757500000 kernel config: https://syzkaller.appspot.com/x/.config?x=c60c9ff9cc916cbc dashboard link: https://syzkaller.appspot.com/bug?extid=ab412638aeb652ded540 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13adb0d0d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1527be48d00000 The issue was bisected to: commit d9d05217cb6990b9a56e13b56e7a1b71e2551f6c Author: Pavel Begunkov Date: Fri Jan 8 20:57:25 2021 +0000 io_uring: stop SQPOLL submit on creator's death bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17b3b248d00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1473b248d00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1073b248d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ab412638aeb652ded540@syzkaller.appspotmail.com Fixes: d9d05217cb69 ("io_uring: stop SQPOLL submit on creator's death") RDX: 0000000000000001 RSI: 0000000020000300 RDI: 00000000000000ff RBP: 0000000000011fc2 R08: 0000000000000001 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004021d0 R13: 0000000000402260 R14: 0000000000000000 R15: 0000000000000000 general protection fault, probably for non-canonical address 0xdffffc0000000022: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000110-0x0000000000000117] CPU: 1 PID: 8473 Comm: syz-executor814 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:io_ring_set_wakeup_flag fs/io_uring.c:6929 [inline] RIP: 0010:io_disable_sqo_submit+0xdb/0x130 fs/io_uring.c:8891 Code: fa 48 c1 ea 03 80 3c 02 00 75 62 48 8b 9b c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 14 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1d 83 RSP: 0018:ffffc9000154fd78 EFLAGS: 00010007 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff815976e0 RDX: 0000000000000022 RSI: 0000000000000004 RDI: 0000000000000114 RBP: ffff8880149ee480 R08: 0000000000000001 R09: 0000000000000003 R10: fffff520002a9fa1 R11: 1ffffffff1d308df R12: fffffffffffffff4 R13: 0000000000000001 R14: ffff8880149ee054 R15: ffff8880149ee000 FS: 0000000000be4880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000304 CR3: 0000000014b50000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_uring_create fs/io_uring.c:9711 [inline] io_uring_setup+0x12b1/0x38e0 fs/io_uring.c:9739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x441309 Code: e8 5c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffea5e64578 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441309 RDX: 0000000000000001 RSI: 0000000020000300 RDI: 00000000000000ff RBP: 0000000000011fc2 R08: 0000000000000001 R09: 00000000004002c8 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004021d0 R13: 0000000000402260 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0941172fec2041bb ]--- RIP: 0010:io_ring_set_wakeup_flag fs/io_uring.c:6929 [inline] RIP: 0010:io_disable_sqo_submit+0xdb/0x130 fs/io_uring.c:8891 Code: fa 48 c1 ea 03 80 3c 02 00 75 62 48 8b 9b c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 14 01 00 00 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1d 83 RSP: 0018:ffffc9000154fd78 EFLAGS: 00010007 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff815976e0 RDX: 0000000000000022 RSI: 0000000000000004 RDI: 0000000000000114 RBP: ffff8880149ee480 R08: 0000000000000001 R09: 0000000000000003 R10: fffff520002a9fa1 R11: 1ffffffff1d308df R12: fffffffffffffff4 R13: 0000000000000001 R14: ffff8880149ee054 R15: ffff8880149ee000 FS: 0000000000be4880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000304 CR3: 0000000014b50000 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