INFO: task syz-executor.4:10707 blocked for more than 143 seconds.
      Not tainted 5.11.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:26672 pid:10707 ppid:  8496 flags:0x00024000
Call Trace:
 context_switch kernel/sched/core.c:4313 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5064
 schedule+0xcf/0x270 kernel/sched/core.c:5143
 io_uring_cancel_files fs/io_uring.c:8786 [inline]
 io_uring_cancel_task_requests fs/io_uring.c:8844 [inline]
 __io_uring_files_cancel+0xc9d/0x14f0 fs/io_uring.c:8941
 io_uring_files_cancel include/linux/io_uring.h:51 [inline]
 exit_files+0xe4/0x170 fs/file.c:431
 do_exit+0xb4f/0x29e0 kernel/exit.c:818
 do_group_exit+0x125/0x310 kernel/exit.c:920
 get_signal+0x3ec/0x2010 kernel/signal.c:2770
 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x148/0x250 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: 0033:0x45e299
RSP: 002b:00007f2beede8c68 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 000000000000307f RBX: 0000000000000006 RCX: 000000000045e299
RDX: 0000000000000000 RSI: 000000000000450c RDI: 0000000000000004
RBP: 000000000119bfd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffea0b063df R14: 00007f2beede99c0 R15: 000000000119bf8c

Showing all locks held in the system:
2 locks held by kworker/u4:0/8:
 #0: ffff8880b9e34c58 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x789/0xe50 kernel/sched/fair.c:10642
 #1: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: cpu_of kernel/sched/sched.h:1084 [inline]
 #1: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x39/0x430 kernel/sched/fair.c:6042
1 lock held by ksoftirqd/0/10:
 #0: ffff8880b9e34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1319 [inline]
 #0: ffff8880b9e34c58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4981
1 lock held by khungtaskd/1654:
 #0: ffffffff8b363860 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254

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

NMI backtrace for cpu 1
CPU: 1 PID: 1654 Comm: khungtaskd Not tainted 5.11.0-rc1-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 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c9/0x250 drivers/acpi/processor_idle.c:516