INFO: task systemd-shutdow:1 blocked for more than 143 seconds.
      Not tainted 5.10.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-shutdow state:D stack:23360 pid:    1 ppid:     0 flags:0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3779 [inline]
 __schedule+0x8a2/0x1f30 kernel/sched/core.c:4528
 schedule+0xcb/0x270 kernel/sched/core.c:4606
 wait_for_device_probe+0x1be/0x220 drivers/base/dd.c:702
 device_shutdown+0x18/0x5c0 drivers/base/core.c:4007
 kernel_restart_prepare kernel/reboot.c:76 [inline]
 kernel_restart kernel/reboot.c:246 [inline]
 __do_sys_reboot.cold+0x5d/0x97 kernel/reboot.c:347
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7ffbba78f8c6
RSP: 002b:00007ffce56b5648 EFLAGS: 00000206 ORIG_RAX: 00000000000000a9
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffbba78f8c6
RDX: 0000000001234567 RSI: 0000000028121969 RDI: fffffffffee1dead
RBP: 00007ffce56b56d8 R08: 0000000000002800 R09: 0000000000000005
R10: 0000000000000002 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 000056423ba74150 R15: 00007ffce56b59c8

Showing all locks held in the system:
1 lock held by systemd-shutdow/1:
 #0: ffffffff87128928 (system_transition_mutex){+.+.}-{3:3}, at: __do_sys_reboot+0x1a4/0x3e0 kernel/reboot.c:344
5 locks held by kworker/1:0/17:
1 lock held by khungtaskd/1270:
 #0: ffffffff872495a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6254

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1270 Comm: khungtaskd Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x46/0xe0 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1da/0x200 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+0xd32/0xf70 kernel/hung_task.c:294
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:asm_sysvec_call_function_single+0x0/0x20 arch/x86/include/asm/idtentry.h:638
Code: 00 66 0f 1f 84 00 00 00 00 00 0f 1f 00 6a ff e8 f6 02 00 00 48 89 e7 e8 be c8 fb ff e9 a9 03 00 00 66 0f 1f 84 00 00 00 00 00 <0f> 1f 00 6a ff e8 d6 02 00 00 48 89 e7 e8 6e ca fb ff e9 89 03 00
RSP: 0018:ffffffff87007d38 EFLAGS: 00000093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff10798a1
RDX: ffffffff87031000 RSI: ffffffff859d4d07 RDI: ffffffff859d4cf1
RBP: ffff8881023bc864 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff8881023bc800 R14: ffff8881023bc864 R15: ffff888105d0c804
FS:  0000000000000000(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffce56b55c8 CR3: 0000000108e60000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:79 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:169 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
RIP: 0010:acpi_idle_do_entry+0x1c9/0x250 drivers/acpi/processor_idle.c:517
Code: cd 70 a1 fb 84 db 75 ac e8 74 78 a1 fb e8 cf 1e a7 fb e9 0c 00 00 00 e8 65 78 a1 fb 0f 00 2d 5e 37 6a 00 e8 59 78 a1 fb fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 f4 70 a1 fb 48 85 db
RSP: 0018:ffffffff87007d60 EFLAGS: 00000293 acpi_idle_enter+0x355/0x4f0 drivers/acpi/processor_idle.c:648
 cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x3d5/0x580 kernel/sched/idle.c:299
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:395
 start_kernel+0x472/0x493 init/main.c:1061
 secondary_startup_64_no_verify+0xb0/0xbb