[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.252' (ECDSA) to the list of known hosts. syzkaller login: [ 314.790442][ T6486] cgroup: Unknown subsys name 'net' [ 314.801567][ T6486] cgroup: Unknown subsys name 'rlimit' executing program [ 314.883479][ C0] hrtimer: interrupt took 46753 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 383.893010][ T9467] ------------[ cut here ]------------ [ 383.898797][ T9467] WARNING: CPU: 1 PID: 9467 at fs/io_uring.c:1183 io_poll_task_func+0x81d/0x9f0 [ 383.908050][ T9467] Modules linked in: [ 383.912160][ T9467] CPU: 1 PID: 9467 Comm: syz-executor199 Not tainted 5.15.0-rc7-next-20211029-syzkaller #0 [ 383.922256][ T9467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 383.932391][ T9467] RIP: 0010:io_poll_task_func+0x81d/0x9f0 [ 383.938136][ T9467] Code: e8 e8 f3 da ff f0 ff 8d 80 00 00 00 0f 94 c3 31 ff 89 de e8 15 33 94 ff 84 db 0f 84 47 f8 ff ff e9 a4 fa ff ff e8 23 2f 94 ff <0f> 0b eb c5 e8 4a f0 da ff e9 0e f8 ff ff 4c 89 f7 e8 0d f0 da ff [ 383.957851][ T9467] RSP: 0018:ffffc9000daa7d98 EFLAGS: 00010293 [ 383.963980][ T9467] RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000 [ 383.972029][ T9467] RDX: ffff88806d821d40 RSI: ffffffff81e39d0d RDI: 0000000000000003 [ 383.980062][ T9467] RBP: ffff888072c1b140 R08: 000000000000007f R09: ffff888072c1b1c3 [ 383.988039][ T9467] R10: ffffffff81e39cd1 R11: 0000000000000000 R12: ffff888072c1b1c0 [ 383.996275][ T9467] R13: ffff88806b2a0000 R14: 0000000000000016 R15: ffff8880173f03c0 [ 384.004319][ T9467] FS: 00007f1c4f07e700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 384.013418][ T9467] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 384.020084][ T9467] CR2: 0000000020001348 CR3: 000000001d66d000 CR4: 00000000003506e0 [ 384.028067][ T9467] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 384.036138][ T9467] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 384.044278][ T9467] Call Trace: [ 384.047558][ T9467] [ 384.050616][ T9467] tctx_task_work+0x1b3/0x630 [ 384.055319][ T9467] ? __io_submit_flush_completions+0x2c0/0x2c0 [ 384.061544][ T9467] ? rwlock_bug.part.0+0x90/0x90 [ 384.066537][ T9467] ? _raw_spin_unlock_irq+0x1f/0x40 [ 384.071917][ T9467] task_work_run+0xdd/0x1a0 [ 384.076474][ T9467] exit_to_user_mode_prepare+0x256/0x290 [ 384.082324][ T9467] syscall_exit_to_user_mode+0x19/0x60 [ 384.087887][ T9467] do_syscall_64+0x42/0xb0 [ 384.092392][ T9467] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 384.098294][ T9467] RIP: 0033:0x7f1c4f0d57f9 [ 384.102794][ T9467] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 18 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 b8 ff ff ff f7 d8 64 89 01 48 [ 384.122511][ T9467] RSP: 002b:00007f1c4f07e2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa [ 384.131011][ T9467] RAX: 000000000000052c RBX: 00007f1c4f1574a8 RCX: 00007f1c4f0d57f9 [ 384.139080][ T9467] RDX: 0000000000000000 RSI: 000000000000450e RDI: 0000000000000006 [ 384.147069][ T9467] RBP: 00007f1c4f1574a0 R08: 0000000000000000 R09: 0000000000000000 [ 384.155184][ T9467] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1c4f124598 [ 384.163258][ T9467] R13: 0000000000000006 R14: 00007f1c4f07e400 R15: 0000000000022000 [ 384.171313][ T9467] [ 384.174345][ T9467] Kernel panic - not syncing: panic_on_warn set ... [ 384.180927][ T9467] CPU: 1 PID: 9467 Comm: syz-executor199 Not tainted 5.15.0-rc7-next-20211029-syzkaller #0 [ 384.190888][ T9467] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 384.200925][ T9467] Call Trace: [ 384.204191][ T9467] [ 384.207107][ T9467] dump_stack_lvl+0xcd/0x134 [ 384.211757][ T9467] panic+0x2b0/0x6dd [ 384.215654][ T9467] ? __warn_printk+0xf3/0xf3 [ 384.220232][ T9467] ? __warn.cold+0x1a/0x44 [ 384.224633][ T9467] ? io_poll_task_func+0x81d/0x9f0 [ 384.229734][ T9467] __warn.cold+0x35/0x44 [ 384.233962][ T9467] ? io_poll_task_func+0x81d/0x9f0 [ 384.239063][ T9467] report_bug+0x1bd/0x210 [ 384.243443][ T9467] handle_bug+0x3c/0x60 [ 384.247590][ T9467] exc_invalid_op+0x14/0x40 [ 384.252090][ T9467] asm_exc_invalid_op+0x12/0x20 [ 384.256944][ T9467] RIP: 0010:io_poll_task_func+0x81d/0x9f0 [ 384.262654][ T9467] Code: e8 e8 f3 da ff f0 ff 8d 80 00 00 00 0f 94 c3 31 ff 89 de e8 15 33 94 ff 84 db 0f 84 47 f8 ff ff e9 a4 fa ff ff e8 23 2f 94 ff <0f> 0b eb c5 e8 4a f0 da ff e9 0e f8 ff ff 4c 89 f7 e8 0d f0 da ff [ 384.282419][ T9467] RSP: 0018:ffffc9000daa7d98 EFLAGS: 00010293 [ 384.288475][ T9467] RAX: 0000000000000000 RBX: 000000000000007f RCX: 0000000000000000 [ 384.296431][ T9467] RDX: ffff88806d821d40 RSI: ffffffff81e39d0d RDI: 0000000000000003 [ 384.304391][ T9467] RBP: ffff888072c1b140 R08: 000000000000007f R09: ffff888072c1b1c3 [ 384.312351][ T9467] R10: ffffffff81e39cd1 R11: 0000000000000000 R12: ffff888072c1b1c0 [ 384.320307][ T9467] R13: ffff88806b2a0000 R14: 0000000000000016 R15: ffff8880173f03c0 [ 384.328273][ T9467] ? io_poll_task_func+0x7e1/0x9f0 [ 384.333382][ T9467] ? io_poll_task_func+0x81d/0x9f0 [ 384.338487][ T9467] ? io_poll_task_func+0x81d/0x9f0 [ 384.343592][ T9467] tctx_task_work+0x1b3/0x630 [ 384.348275][ T9467] ? __io_submit_flush_completions+0x2c0/0x2c0 [ 384.354434][ T9467] ? rwlock_bug.part.0+0x90/0x90 [ 384.359369][ T9467] ? _raw_spin_unlock_irq+0x1f/0x40 [ 384.364583][ T9467] task_work_run+0xdd/0x1a0 [ 384.369169][ T9467] exit_to_user_mode_prepare+0x256/0x290 [ 384.374792][ T9467] syscall_exit_to_user_mode+0x19/0x60 [ 384.380244][ T9467] do_syscall_64+0x42/0xb0 [ 384.384647][ T9467] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 384.390547][ T9467] RIP: 0033:0x7f1c4f0d57f9 [ 384.394952][ T9467] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 18 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 b8 ff ff ff f7 d8 64 89 01 48 [ 384.414566][ T9467] RSP: 002b:00007f1c4f07e2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa [ 384.422967][ T9467] RAX: 000000000000052c RBX: 00007f1c4f1574a8 RCX: 00007f1c4f0d57f9 [ 384.430928][ T9467] RDX: 0000000000000000 RSI: 000000000000450e RDI: 0000000000000006 [ 384.438890][ T9467] RBP: 00007f1c4f1574a0 R08: 0000000000000000 R09: 0000000000000000 [ 384.446859][ T9467] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1c4f124598 [ 384.454815][ T9467] R13: 0000000000000006 R14: 00007f1c4f07e400 R15: 0000000000022000 [ 384.462784][ T9467] [ 384.466130][ T9467] Kernel Offset: disabled [ 384.470531][ T9467] Rebooting in 86400 seconds..