sysrq: HELP : loglevel(0-9) reboot(b) crash(c) show-all-locks(d) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystems(j) sak(k) show-backtrace-all-active-cpus(l) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-tasks(w) dump-ftrace-buffer(z) 
sysrq: Trigger a crash
Kernel panic - not syncing: sysrq triggered crash
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xef/0x16e lib/dump_stack.c:118
 panic+0x2aa/0x6e1 kernel/panic.c:221
 sysrq_handle_crash+0x1b/0x20 drivers/tty/sysrq.c:140
 __handle_sysrq.cold+0x143/0x449 drivers/tty/sysrq.c:556
 sysrq_handle_keypress drivers/tty/sysrq.c:822 [inline]
 sysrq_filter+0x224/0xeb0 drivers/tty/sysrq.c:884
 input_to_handler+0x152/0x4c0 drivers/input/input.c:102
 input_pass_values.part.0+0x2de/0x710 drivers/input/input.c:145
 input_pass_values drivers/input/input.c:134 [inline]
 input_handle_event+0x326/0x13a0 drivers/input/input.c:398
 input_event drivers/input/input.c:440 [inline]
 input_event+0x8e/0xb0 drivers/input/input.c:432
 input_sync include/linux/input.h:442 [inline]
 hidinput_report_event+0xae/0x100 drivers/hid/hid-input.c:1401
 hid_report_raw_event+0x755/0xed0 drivers/hid/hid-core.c:1764
 hid_input_report+0x315/0x3f0 drivers/hid/hid-core.c:1824
 hid_irq_in+0x5cb/0x770 drivers/hid/usbhid/hid-core.c:286
 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1648
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1713
 dummy_timer+0x123d/0x2fdb drivers/usb/gadget/udc/dummy_hcd.c:1967
 call_timer_fn+0x179/0x650 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x5e3/0x1490 kernel/time/timer.c:1786
 __do_softirq+0x221/0x912 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x178/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:_raw_spin_unlock_irq+0x27/0x30 kernel/locking/spinlock.c:200
Code: 44 00 00 55 48 8b 74 24 08 48 89 fd 48 8d 7f 18 e8 de e0 aa fb 48 89 ef e8 06 c2 ab fb e8 81 f8 c8 fb fb 65 ff 0d 81 c4 86 7a <5d> c3 0f 1f 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48
RSP: 0018:ffffffff86e07c80 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: ffffffff86e2c240 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffffffff86e2ca8c
RBP: ffff8881db234480 R08: ffffffff86e2c240 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881db234480
R13: ffff8881cfab3100 R14: 0000000000000000 R15: 0000000000000001
 finish_lock_switch kernel/sched/core.c:3124 [inline]
 finish_task_switch+0x11d/0x5d0 kernel/sched/core.c:3224
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x891/0x1d60 kernel/sched/core.c:4081
 schedule_idle+0x53/0x90 kernel/sched/core.c:4183
 do_idle+0x2c3/0x4e0 kernel/sched/idle.c:293
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361
 start_kernel+0x8b1/0x8eb init/main.c:784
 secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:242
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at kernel/locking/mutex.c:1419 mutex_trylock+0x26d/0x2e0 kernel/locking/mutex.c:1427