rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=8aa/1/0x4000000000000002 softirq=11361/11361 fqs=40 
	(t=10501 jiffies g=6693 q=148)
rcu: rcu_preempt kthread starved for 10422 jiffies! g6693 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: 8340 Comm: udevd 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:mod_memcg_page_state+0x123/0x190 include/linux/memcontrol.h:653
Code: e8 f2 9e 69 00 48 83 3d 12 22 c2 07 00 74 70 e8 e3 27 2e 00 4c 89 ff 57 9d 0f 1f 44 00 00 e8 f4 c2 33 00 eb 43 e8 cd 27 2e 00 <eb> 3c e8 86 c0 33 00 48 c7 c0 28 96 0a 89 48 c1 e8 03 42 80 3c 20
RSP: 0018:ffffc900029d7638 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81487433 RBX: 0000000000000000 RCX: ffff888091f7a080
RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea000235e500
RBP: ffffc900029d7658 R08: 000000000003a768 R09: ffffed1012b926d7
R10: ffffed1012b926d7 R11: 0000000000000000 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff888095c936a8
 free_thread_stack+0x168/0x590 kernel/fork.c:280
 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
 preempt_schedule_irq+0xc1/0x140 kernel/sched/core.c:4338
 retint_kernel+0x1b/0x2b
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:lock_acquire+0x1b2/0x250 kernel/locking/lockdep.c:4488
Code: c1 e8 03 42 80 3c 30 00 74 0c 48 c7 c7 28 96 0a 89 e8 b2 7e 56 00 48 83 3d d2 01 af 07 00 0f 84 9c 00 00 00 48 8b 7d c0 57 9d <0f> 1f 44 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 44 89
RSP: 0018:ffffc900029d78b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02
RAX: 1ffffffff12152c5 RBX: 0000000000000000 RCX: e668264dc84383e6
RDX: dffffc0000000000 RSI: ffff888091f7a918 RDI: 0000000000000286
RBP: ffffc900029d7910 R08: dffffc0000000000 R09: fffffbfff13c851d
R10: fffffbfff13c851d R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff890d4bc0
 rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:208
 rcu_read_lock include/linux/rcupdate.h:617 [inline]
 is_bpf_text_address+0x2a/0x370 kernel/bpf/core.c:707
 kernel_text_address kernel/extable.c:149 [inline]
 __kernel_text_address+0x9a/0x110 kernel/extable.c:104
 unwind_get_return_address+0x4c/0x90 arch/x86/kernel/unwind_frame.c:19
 arch_stack_walk+0x98/0xe0 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xb6/0x150 kernel/stacktrace.c:123
 save_stack mm/kasan/common.c:71 [inline]
 set_track mm/kasan/common.c:79 [inline]
 __kasan_kmalloc+0x11c/0x1b0 mm/kasan/common.c:512
 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:520
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc mm/slab.c:3320 [inline]
 kmem_cache_alloc+0x1f5/0x2e0 mm/slab.c:3484
 getname_flags+0xba/0x640 fs/namei.c:138
 user_path_at_empty+0x2d/0x50 fs/namei.c:2602
 user_path_at include/linux/namei.h:49 [inline]
 vfs_statx fs/stat.c:187 [inline]
 vfs_stat include/linux/fs.h:3249 [inline]
 __do_sys_newstat fs/stat.c:341 [inline]
 __se_sys_newstat+0x4b/0x150 fs/stat.c:337
 __x64_sys_newstat+0x5b/0x70 fs/stat.c:337
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f9a1eb40c65
Code: 00 00 00 e8 5d 01 00 00 48 83 c4 18 c3 90 90 90 90 90 90 90 90 83 ff 01 48 89 f0 77 18 48 89 c7 48 89 d6 b8 04 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 17 f3 c3 90 48 8b 05 a1 51 2b 00 64 c7 00 16
RSP: 002b:00007fff8a0bc1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 00007fff8a0bc260 RCX: 00007f9a1eb40c65
RDX: 00007fff8a0bc1d0 RSI: 00007fff8a0bc1d0 RDI: 00007fff8a0bc260
RBP: 00000000016105f0 R08: 00007fff8a0bc270 R09: 00007f9a1eb97790
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000015fe250
R13: 0000000000000000 R14: 00007fff8a0bc6d0 R15: 0000000000000001