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: 1 PID: 0 Comm: swapper/1 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:default_idle+0x28/0x2e0 arch/x86/kernel/process.c:700
Code: cc cc 41 56 41 55 65 44 8b 2d 2c 7d 86 7a 41 54 55 53 0f 1f 44 00 00 e8 86 0c c9 fb e9 07 00 00 00 0f 00 2d 7a 03 47 00 fb f4 <65> 44 8b 2d 08 7d 86 7a 0f 1f 44 00 00 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffff8881da22fdc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: ffff8881da213100 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff8881da21394c
RBP: ffffed103b442620 R08: ffff8881da213100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x3c3/0x4e0 kernel/sched/idle.c:269
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361
 start_secondary+0x27d/0x330 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:242
------------[ cut here ]------------
WARNING: CPU: 1 PID: 0 at kernel/locking/mutex.c:1419 mutex_trylock+0x26d/0x2e0 kernel/locking/mutex.c:1427