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 839F1C71153 for ; Mon, 28 Aug 2023 10:01:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230195AbjH1KAa (ORCPT ); Mon, 28 Aug 2023 06:00:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48482 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230228AbjH1J74 (ORCPT ); Mon, 28 Aug 2023 05:59:56 -0400 Received: from mail-pf1-f205.google.com (mail-pf1-f205.google.com [209.85.210.205]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FFCAB2 for ; Mon, 28 Aug 2023 02:59:53 -0700 (PDT) Received: by mail-pf1-f205.google.com with SMTP id d2e1a72fcca58-68bf123aca4so2581098b3a.1 for ; Mon, 28 Aug 2023 02:59:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693216793; x=1693821593; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=estplTWSxKrAsxyRRN46bbjvd0eh61f81Ark1D69GWA=; b=e53Nk5lkBVWrSO9DJIL9QESS98Km86j6SQjX/iafmjMgRF/UzICyftk69HswOx/lFh IHekOK3nmpY8cVuplIK/k4auXfMJtdzNyqw/7PMRJDuq0txZmWkJHDp1Nc0Lu76rLrOy kDqYYGIqXaYC+DqruyO/SB7s9Jv2oNnT/9SiKdGX6bLlZOtRVhVDImMAbG5LwX/QRsgR AHLuZfwZTOyXQYFkHRpSegwFs5BoerD/cx7DlXNOKWPhd4KpMpdXGJbzzLSt98p7WC41 rCt3ahO2Z9mdzGx2f/dIkjiwjGW9xfoue3RWynQxLx4/IewfVxBi4aKUIjZIXDhIKXzU FvSw== X-Gm-Message-State: AOJu0Yybd662bxPs87LMUrCyadBm/sf0yqy3XNK/EqfjVV0wwmGlwuzS DHhXOWG16e/+ghdx62uWqgviDZeqd2TXgFNyKxq778tV8ldn X-Google-Smtp-Source: AGHT+IHDaei6qWidJDdm6CroNx2NnLungXrApU1x38pM+tfjRV+A7R3/jLv4RjTrp/jWHptaEUjMDiPX48kuppPUbzaKJFAqKslX MIME-Version: 1.0 X-Received: by 2002:a05:6a00:2d24:b0:68b:de2e:74f9 with SMTP id fa36-20020a056a002d2400b0068bde2e74f9mr3688060pfb.1.1693216792721; Mon, 28 Aug 2023 02:59:52 -0700 (PDT) Date: Mon, 28 Aug 2023 02:59:52 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000753fbd0603f8c10b@google.com> Subject: [syzbot] [io-uring?] general protection fault in io_sqpoll_wq_cpu_affinity 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: 626932085009 Add linux-next specific files for 20230825 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12a97797a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=8a8c992a790e5073 dashboard link: https://syzkaller.appspot.com/bug?extid=c74fea926a78b8a91042 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/46ec18b3c2fb/disk-62693208.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b4ea0cb78498/vmlinux-62693208.xz kernel image: https://storage.googleapis.com/syzbot-assets/5fb3938c7272/bzImage-62693208.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c74fea926a78b8a91042@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc000000011d: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000008e8-0x00000000000008ef] CPU: 1 PID: 27342 Comm: syz-executor.5 Not tainted 6.5.0-rc7-next-20230825-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:io_sqpoll_wq_cpu_affinity+0x8c/0xe0 io_uring/sqpoll.c:433 Code: 48 c1 ea 03 80 3c 02 00 75 64 4c 8b a3 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 e8 08 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 37 49 8b bc 24 e8 08 00 00 48 89 ee e8 7e ac 02 00 RSP: 0018:ffffc900051dfe00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888056c72400 RCX: 0000000000000000 RDX: 000000000000011d RSI: ffffffff841f12be RDI: 00000000000008e8 RBP: ffffc900051dfec8 R08: 0000000000000000 R09: ffffed100ad8e482 R10: ffffc900051dfde8 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000011 R15: ffffc900051dfec8 FS: 00007f1f3e2bc6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe2c9b3010 CR3: 0000000029652000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __io_register_iowq_aff io_uring/io_uring.c:4207 [inline] __io_register_iowq_aff+0xa7/0xe0 io_uring/io_uring.c:4198 io_register_iowq_aff io_uring/io_uring.c:4240 [inline] __io_uring_register io_uring/io_uring.c:4447 [inline] __do_sys_io_uring_register+0xf58/0x2250 io_uring/io_uring.c:4539 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1f3d47cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1f3e2bc0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007f1f3d59bf80 RCX: 00007f1f3d47cae9 RDX: 0000000020000140 RSI: 0000000000000011 RDI: 0000000000000003 RBP: 00007f1f3d4c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f1f3d59bf80 R15: 00007fffb91ba9f8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:io_sqpoll_wq_cpu_affinity+0x8c/0xe0 io_uring/sqpoll.c:433 Code: 48 c1 ea 03 80 3c 02 00 75 64 4c 8b a3 a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 e8 08 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 37 49 8b bc 24 e8 08 00 00 48 89 ee e8 7e ac 02 00 RSP: 0018:ffffc900051dfe00 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888056c72400 RCX: 0000000000000000 RDX: 000000000000011d RSI: ffffffff841f12be RDI: 00000000000008e8 RBP: ffffc900051dfec8 R08: 0000000000000000 R09: ffffed100ad8e482 R10: ffffc900051dfde8 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000011 R15: ffffc900051dfec8 FS: 00007f1f3e2bc6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6671b75198 CR3: 0000000029652000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 c1 ea 03 shr $0x3,%rdx 4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 8: 75 64 jne 0x6e a: 4c 8b a3 a8 00 00 00 mov 0xa8(%rbx),%r12 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 49 8d bc 24 e8 08 00 lea 0x8e8(%r12),%rdi 22: 00 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 37 jne 0x67 30: 49 8b bc 24 e8 08 00 mov 0x8e8(%r12),%rdi 37: 00 38: 48 89 ee mov %rbp,%rsi 3b: e8 7e ac 02 00 call 0x2acbe --- 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. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup