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=unavailable 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 52B68C433E0 for ; Wed, 10 Feb 2021 00:57:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E92A64E54 for ; Wed, 10 Feb 2021 00:57:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234674AbhBJA4y (ORCPT ); Tue, 9 Feb 2021 19:56:54 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:57245 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234462AbhBJAyz (ORCPT ); Tue, 9 Feb 2021 19:54:55 -0500 Received: by mail-io1-f69.google.com with SMTP id m2so538915iow.23 for ; Tue, 09 Feb 2021 16:54:38 -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:message-id:subject:from:to; bh=ELLsDRhc1OwIhGjv11zMuyJ1ltE0yFcmeFvVf50z9n0=; b=M/0KsINwprewqsaFHaEAKUyS7U2w1tVap0f5QhR1GBrNFhotEUp4AXjjy91VqUAjSL uj1SAf+CrQVW1nKWl6xUUFoC+3Gnq12pt9r936zmPJYLzxbSyl4LT/s16JOjbAyr3KrJ ki9azmowl3DrqkNCawQpn68tPpdXe1j+6nXCuxhphDOd4ARchRzujhaJh0dGud49VFeV 3HSt4joi09aehp02KZiYQGv+nMNEljdIYFNBmKd8GKnO10yS8QwwjNKOWHKPHRlTmhcf eEU52uoGJC7lO65+Lpu7RQad6txHZ864Inixqikg5c+yfl1ONQUAmDIFpr7aikO6PRoy mqQg== X-Gm-Message-State: AOAM533upVfXrQ7TOQqanA7E1+Qw88iQYGFJwB3aKVCAES82INSKznZ3 Bq3NNLuK/npBtj31u4iBnerEkg8rbLDrpTJN1lKyKv3Cd7ZM X-Google-Smtp-Source: ABdhPJziRd9BjJP8MQjGFT377RUnzOl96G/WQ1eNeNV5J7VTF9V5o/+nzhKQGJUK5u71+1ADkZ6A2TnL1f5e9PUo2lchyT+P0eox MIME-Version: 1.0 X-Received: by 2002:a92:8711:: with SMTP id m17mr601345ild.48.1612918453301; Tue, 09 Feb 2021 16:54:13 -0800 (PST) Date: Tue, 09 Feb 2021 16:54:13 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000075f90305baf0d732@google.com> Subject: INFO: task hung in io_uring_cancel_task_requests From: syzbot To: 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: dd86e7fa Merge tag 'pci-v5.11-fixes-2' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13e43f90d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e83e68d0a6aba5f6 dashboard link: https://syzkaller.appspot.com/bug?extid=695b03d82fa8e4901b06 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1490f0d4d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17aedf1cd00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+695b03d82fa8e4901b06@syzkaller.appspotmail.com INFO: task syz-executor893:8493 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor893 state:D stack:28144 pid: 8493 ppid: 8480 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 io_uring_cancel_files fs/io_uring.c:8912 [inline] io_uring_cancel_task_requests+0xe70/0x11a0 fs/io_uring.c:8979 __io_uring_files_cancel+0x110/0x1b0 fs/io_uring.c:9067 io_uring_files_cancel include/linux/io_uring.h:51 [inline] do_exit+0x2fe/0x2ae0 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43eb19 RSP: 002b:00007ffda99d64d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eb19 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 INFO: task syz-executor893:8571 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor893 state:D stack:28144 pid: 8571 ppid: 8479 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 io_uring_cancel_files fs/io_uring.c:8912 [inline] io_uring_cancel_task_requests+0xe70/0x11a0 fs/io_uring.c:8979 __io_uring_files_cancel+0x110/0x1b0 fs/io_uring.c:9067 io_uring_files_cancel include/linux/io_uring.h:51 [inline] do_exit+0x2fe/0x2ae0 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43eb19 RSP: 002b:00007ffda99d64d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eb19 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 INFO: task syz-executor893:8579 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor893 state:D stack:28144 pid: 8579 ppid: 8482 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 io_uring_cancel_files fs/io_uring.c:8912 [inline] io_uring_cancel_task_requests+0xe70/0x11a0 fs/io_uring.c:8979 __io_uring_files_cancel+0x110/0x1b0 fs/io_uring.c:9067 io_uring_files_cancel include/linux/io_uring.h:51 [inline] do_exit+0x2fe/0x2ae0 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43eb19 RSP: 002b:00007ffda99d64d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eb19 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 INFO: task syz-executor893:8591 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor893 state:D stack:28144 pid: 8591 ppid: 8481 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 io_uring_cancel_files fs/io_uring.c:8912 [inline] io_uring_cancel_task_requests+0xe70/0x11a0 fs/io_uring.c:8979 __io_uring_files_cancel+0x110/0x1b0 fs/io_uring.c:9067 io_uring_files_cancel include/linux/io_uring.h:51 [inline] do_exit+0x2fe/0x2ae0 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43eb19 RSP: 002b:00007ffda99d64d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eb19 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 INFO: task syz-executor893:8624 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor893 state:D stack:28144 pid: 8624 ppid: 8477 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 io_uring_cancel_files fs/io_uring.c:8912 [inline] io_uring_cancel_task_requests+0xe70/0x11a0 fs/io_uring.c:8979 __io_uring_files_cancel+0x110/0x1b0 fs/io_uring.c:9067 io_uring_files_cancel include/linux/io_uring.h:51 [inline] do_exit+0x2fe/0x2ae0 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43eb19 RSP: 002b:00007ffda99d64d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eb19 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 INFO: task syz-executor893:8633 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor893 state:D stack:27648 pid: 8633 ppid: 8478 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 io_uring_cancel_files fs/io_uring.c:8912 [inline] io_uring_cancel_task_requests+0xe70/0x11a0 fs/io_uring.c:8979 __io_uring_files_cancel+0x110/0x1b0 fs/io_uring.c:9067 io_uring_files_cancel include/linux/io_uring.h:51 [inline] do_exit+0x2fe/0x2ae0 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43eb19 RSP: 002b:00007ffda99d64d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eb19 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000010000000 R10: 0000000000008011 R11: 0000000000000246 R12: 00000000004b02f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Showing all locks held in the system: 1 lock held by khungtaskd/1638: #0: ffffffff8bd73da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 2 locks held by in:imklog/8193: #0: ffff888019c15bb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 #1: ffffffff8bd73da0 (rcu_read_lock){....}-{1:2}, at: is_bpf_text_address+0x0/0x160 kernel/bpf/core.c:687 1 lock held by syz-executor893/8493: #0: ffff88801362dc70 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7468 [inline] #0: ffff88801362dc70 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7463 [inline] #0: ffff88801362dc70 (&sqd->lock){+.+.}-{3:3}, at: io_uring_cancel_task_requests+0x311/0x11a0 fs/io_uring.c:8973 1 lock held by syz-executor893/8571: #0: ffff8880232b3470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7468 [inline] #0: ffff8880232b3470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7463 [inline] #0: ffff8880232b3470 (&sqd->lock){+.+.}-{3:3}, at: io_uring_cancel_task_requests+0x311/0x11a0 fs/io_uring.c:8973 1 lock held by syz-executor893/8579: #0: ffff888014271070 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7468 [inline] #0: ffff888014271070 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7463 [inline] #0: ffff888014271070 (&sqd->lock){+.+.}-{3:3}, at: io_uring_cancel_task_requests+0x311/0x11a0 fs/io_uring.c:8973 1 lock held by syz-executor893/8591: #0: ffff8880195b2470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7468 [inline] #0: ffff8880195b2470 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7463 [inline] #0: ffff8880195b2470 (&sqd->lock){+.+.}-{3:3}, at: io_uring_cancel_task_requests+0x311/0x11a0 fs/io_uring.c:8973 1 lock held by syz-executor893/8624: #0: ffff8880161a4870 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7468 [inline] #0: ffff8880161a4870 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7463 [inline] #0: ffff8880161a4870 (&sqd->lock){+.+.}-{3:3}, at: io_uring_cancel_task_requests+0x311/0x11a0 fs/io_uring.c:8973 1 lock held by syz-executor893/8633: #0: ffff888025448c70 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7468 [inline] #0: ffff888025448c70 (&sqd->lock){+.+.}-{3:3}, at: io_sq_thread_park fs/io_uring.c:7463 [inline] #0: ffff888025448c70 (&sqd->lock){+.+.}-{3:3}, at: io_uring_cancel_task_requests+0x311/0x11a0 fs/io_uring.c:8973 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1638 Comm: khungtaskd Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd43/0xfa0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4885 Comm: systemd-journal Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:latch_tree_find include/linux/rbtree_latch.h:209 [inline] RIP: 0010:bpf_ksym_find+0x6a/0x1c0 kernel/bpf/core.c:667 Code: 68 ff ff ff 48 89 ef 4c 89 fe e8 41 66 f4 ff 4c 39 fd 0f 83 e9 00 00 00 e8 c3 5e f4 ff 8b 1d ad 7e 22 0a 44 8b 74 24 04 89 de <44> 89 f7 e8 ae 65 f4 ff 41 39 de 0f 84 e3 00 00 00 e8 a0 5e f4 ff RSP: 0018:ffffc90001207aa0 EFLAGS: 00000093 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888015d6a200 RSI: 0000000000000000 RDI: ffffffff8ba0f3b0 RBP: 00007fb450c54840 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff817ec8c7 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000200 FS: 00007fb4516c58c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb44eab7000 CR3: 0000000015593000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: is_bpf_text_address+0x75/0x160 kernel/bpf/core.c:701 kernel_text_address kernel/extable.c:151 [inline] kernel_text_address+0xbd/0xf0 kernel/extable.c:120 __kernel_text_address+0x9/0x30 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:313 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_record_aux_stack+0x87/0xb0 mm/kasan/generic.c:344 __call_rcu kernel/rcu/tree.c:2965 [inline] call_rcu+0xbb/0x700 kernel/rcu/tree.c:3038 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x249/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb450c54840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffd66c13138 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: fffffffffffffffe RBX: 00007ffd66c13440 RCX: 00007fb450c54840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055b07430c150 RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055b0742fe060 R14: 00007ffd66c13400 R15: 000055b07430c1a0 --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches