rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=e22/1/0x4000000000000002 softirq=11388/11393 fqs=31 
	(t=10501 jiffies g=7069 q=375)
rcu: rcu_preempt kthread starved for 10440 jiffies! g7069 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29032    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3385 [inline]
 __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081
 schedule+0x181/0x210 kernel/sched/core.c:4155
 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
 rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 0
CPU: 0 PID: 8484 Comm: syz-executor.5 Not tainted 5.4.0-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+0x1fb/0x318 lib/dump_stack.c:118
 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1514 [inline]
 __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__memcg_kmem_uncharge+0x21a/0x2e0 mm/memcontrol.c:2925
Code: 0d 89 e8 59 97 00 00 bf 01 00 00 00 e8 2f e3 9b ff 65 8b 05 d4 fd 4a 7e 85 c0 74 53 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> 49 8d 5f 10 48 89 df be 08 00 00 00 e8 04 c1 fa ff 48 8b 45 d0
RSP: 0018:ffffc900027a73e0 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000001 RBX: ffffea0002605480 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0002605480
RBP: ffffc900027a7420 R08: 000000000003a768 R09: ffffed10119442cf
R10: ffffed10119442cf R11: 0000000000000000 R12: ffff88808f226820
R13: dffffc0000000000 R14: 1ffff11011e44d04 R15: ffff88808ca21668
 release_task_stack kernel/fork.c:440 [inline]
 put_task_stack+0xa3/0x130 kernel/fork.c:451
 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081
 schedule+0x181/0x210 kernel/sched/core.c:4155
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4214
 __mutex_lock_common+0x1411/0x2e10 kernel/locking/mutex.c:1036
 __mutex_lock kernel/locking/mutex.c:1106 [inline]
 mutex_lock_nested+0x1b/0x30 kernel/locking/mutex.c:1121
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
 nsim_create+0x198/0x230 drivers/net/netdevsim/netdev.c:302
 __nsim_dev_port_add+0x289/0x4d0 drivers/net/netdevsim/dev.c:648
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:697 [inline]
 nsim_dev_probe+0xb55/0xef0 drivers/net/netdevsim/dev.c:818
 nsim_bus_probe+0x15/0x20 drivers/net/netdevsim/bus.c:242
 really_probe+0x71c/0xf40 drivers/base/dd.c:548
 driver_probe_device+0xfc/0x260 drivers/base/dd.c:721
 __device_attach_driver+0x336/0x3f0 drivers/base/dd.c:828
 bus_for_each_drv+0x12b/0x180 drivers/base/bus.c:430
 __device_attach+0x1ea/0x390 drivers/base/dd.c:894
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:941
 bus_probe_device+0xb9/0x1f0 drivers/base/bus.c:490
 device_add+0x1710/0x1ad0 drivers/base/core.c:2487
 device_register+0x1d/0x20 drivers/base/core.c:2560
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:288 [inline]
 new_device_store+0x286/0x510 drivers/net/netdevsim/bus.c:182
 bus_attr_store+0x78/0x90 drivers/base/bus.c:121
 sysfs_kf_write+0x281/0x2f0 fs/sysfs/file.c:138
 kernfs_fop_write+0x3e4/0x4e0 fs/kernfs/file.c:315
 __vfs_write+0xb8/0x740 fs/read_write.c:494
 vfs_write+0x275/0x590 fs/read_write.c:558
 ksys_write+0x117/0x220 fs/read_write.c:611
 __do_sys_write fs/read_write.c:623 [inline]
 __se_sys_write fs/read_write.c:620 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:620
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x414130
Code: b0 89 c8 f7 d8 eb ed b8 6e 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 3d 3d 43 66 00 00 75 14 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 c4 1b 00 00 c3 48 83 ec 08 e8 ca fc ff ff
RSP: 002b:00007ffef18e1ac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000414130
RDX: 0000000000000003 RSI: 00007ffef18e1af0 RDI: 0000000000000004
RBP: 00007ffef18e1af0 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000075 R11: 0000000000000246 R12: 00000000004bfc97
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000