IPVS: ftp: loaded support on port[0] = 21
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=dfe/1/0x4000000000000002 softirq=28231/28232 fqs=18911 
rcu: 	 (t=105010 jiffies g=59205 q=761)
NMI backtrace for cpu 1
CPU: 1 PID: 7615 Comm: syz-executor5 Not tainted 4.19.0-rc1+ #211
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+0x1c9/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:162 [inline]
 rcu_dump_cpu_stacks+0x175/0x1c2 kernel/rcu/tree.c:1340
 print_cpu_stall.cold.78+0x2fb/0x59c kernel/rcu/tree.c:1478
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3276 [inline]
 rcu_pending kernel/rcu/tree.c:3319 [inline]
 rcu_check_callbacks+0xd4a/0x15a0 kernel/rcu/tree.c:2665
 update_process_times+0x2d/0x70 kernel/time/timer.c:1636
 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164
 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0x3eb/0xff0 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1029 [inline]
 smp_apic_timer_interrupt+0x16d/0x6a0 arch/x86/kernel/apic/apic.c:1054
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline]
RIP: 0010:lock_acquire+0x25f/0x4f0 kernel/locking/lockdep.c:3904
Code: 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 41 02 00 00 48 83 3d b8 13 92 06 00 0f 84 a6 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00
RSP: 0018:ffff8801cad8f9e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff100395b1f41 RCX: 0000000000000000
RDX: 1ffffffff0fe37b5 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff8801cad8fad0 R08: 00000000000026e9 R09: 0000000000000000
R10: ffff8801c9e5ee80 R11: 16fb0df9f74494d6 R12: ffff8801c9e5e640
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 __might_fault+0x155/0x1e0 mm/memory.c:4578
 mousedev_write+0x1cb/0x840 drivers/input/mousedev.c:686
 __vfs_write+0x117/0x9d0 fs/read_write.c:485
 vfs_write+0x1fc/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457089
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0d67fd3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0d67fd46d4 RCX: 0000000000457089
RDX: 000000010000001a RSI: 00000000200001c0 RDI: 0000000000000008
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d7290 R14: 00000000004ca4cc R15: 0000000000000000
rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 1-... } 106551 jiffies s: 317 root: 0x2/.
rcu: blocking rcu_node structures:
Task dump for CPU 1:
syz-executor5   R  running task    24224  7615   4453 0x8000000c
Call Trace: