rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10119 ticks this GP) idle=6e2/1/0x4000000000000000 softirq=20503/20505 fqs=5176 
	(t=10502 jiffies g=27681 q=385)
NMI backtrace for cpu 0
CPU: 0 PID: 13379 Comm: syz-executor.5 Not tainted 5.11.0-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:79 [inline]
 dump_stack+0xfa/0x151 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x222/0x2a7 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:697 [inline]
 rcu_pending kernel/rcu/tree.c:3830 [inline]
 rcu_sched_clock_irq.cold+0x4f7/0x11dd kernel/rcu/tree.c:2650
 update_process_times+0x16d/0x200 kernel/time/timer.c:1796
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x2e/0x50 kernel/locking/spinlock.c:191
Code: 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 8a 6e 55 f8 48 89 ef e8 02 24 56 f8 80 e7 02 74 06 e8 28 73 75 f8 fb bf 01 00 00 00 <e8> cd 1f 4a f8 65 8b 05 56 21 fe 76 85 c0 74 03 5b 5d c3 e8 e1 76
RSP: 0018:ffffc90000007e48 EFLAGS: 00000206
RAX: 000000000266c0b4 RBX: 0000000000000282 RCX: 1ffffffff1f556ea
RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000001
RBP: ffff8880b9c26340 R08: 0000000000000001 R09: ffffffff8faa47b7
R10: 0000000000000001 R11: 0000000000000000 R12: 00000055851e7187
R13: ffff8880b9c265c0 R14: ffff8880b9c26340 R15: ffffffff8518b770
 __run_hrtimer kernel/time/hrtimer.c:1515 [inline]
 __hrtimer_run_queues+0x51a/0xe40 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:page_memcg include/linux/memcontrol.h:368 [inline]
RIP: 0010:lock_page_memcg+0xbf/0x4f0 mm/memcontrol.c:2175
Code: ff df 4c 8d 7b 08 49 89 c6 48 89 45 a8 4c 89 f8 49 c1 ee 03 4c 89 7d a0 48 c1 e8 03 4d 01 e6 4c 01 e0 48 89 45 c8 41 80 3e 00 <0f> 85 7c 03 00 00 48 8b 45 d0 48 8b 58 38 48 8b 45 c8 80 38 00 0f
RSP: 0018:ffffc90002a2f6d8 EFLAGS: 00000246
RAX: fffff94000278c31 RBX: ffffea00013c6180 RCX: 000000003dfd55cb
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8880b9c36108
RBP: ffffc90002a2f738 R08: 0000000000000000 R09: ffffffff8faa47a7
R10: fffffbfff1f548f4 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: fffff94000278c37 R15: ffffea00013c6188
 page_remove_rmap+0x25/0x1360 mm/rmap.c:1334
 zap_pte_range mm/memory.c:1276 [inline]
 zap_pmd_range mm/memory.c:1380 [inline]
 zap_pud_range mm/memory.c:1409 [inline]
 zap_p4d_range mm/memory.c:1430 [inline]
 unmap_page_range+0xe30/0x2650 mm/memory.c:1451
 unmap_single_vma+0x198/0x300 mm/memory.c:1496
 unmap_vmas+0x16d/0x2f0 mm/memory.c:1528
 exit_mmap+0x2a8/0x590 mm/mmap.c:3220
 __mmput+0x122/0x470 kernel/fork.c:1082
 mmput+0x58/0x60 kernel/fork.c:1103
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xb6f/0x2ae0 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x42c/0x2100 kernel/signal.c:2773
 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ef9
Code: Unable to access opcode bytes at RIP 0x465ecf.
RSP: 002b:00007f50fed65188 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000000020ffc000 RBX: 000000000056c158 RCX: 0000000000465ef9
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffc000
RBP: 00000000004bcd1c R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 000000000056c158
R13: 00007ffef220a6af R14: 00007f50fed65300 R15: 0000000000022000