rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=f82/1/0x4000000000000000 softirq=150040/150042 fqs=4 
	(t=10500 jiffies g=288181 q=30046)
rcu: rcu_preempt kthread timer wakeup didn't happen for 1076 jiffies! g288181 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=121477
rcu: rcu_preempt kthread starved for 1077 jiffies! g288181 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:28816 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x934/0x2710 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0xd1a/0x2300 kernel/rcu/tree.c:2177
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2525 Comm: syz-executor.3 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:timerqueue_del+0x24/0x140 lib/timerqueue.c:55
Code: c3 0f 1f 44 00 00 41 54 55 48 89 fd 53 48 89 f3 48 83 ec 08 e8 7d 6d 87 fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 e2 00 00 00 4c 8b 23 48 89 de 4c 89 e7 e8 24 73
RSP: 0018:ffffc90000dc0dc8 EFLAGS: 00000802
RAX: dffffc0000000000 RBX: ffff888147196fd8 RCX: 0000000000000000
RDX: 1ffff11028e32dfb RSI: ffffffff83ee1cb3 RDI: ffff8880b9d26450
RBP: ffff8880b9d26450 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff81652c18 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff8880b9d26380 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005ed5e0 CR3: 0000000027bc8000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __remove_hrtimer+0xa1/0x2a0 kernel/time/hrtimer.c:1014
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x4ea/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__tlb_remove_page_size+0xa6/0x420 mm/mmu_gather.c:81
Code: 28 48 8d 7d 08 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e ed 02 00 00 48 b8 00 00 00 00 00 fc ff df 44 8b 65 08 <4a> 8d 7c e5 10 45 8d 6c 24 01 48 89 fa 48 c1 ea 03 44 89 6d 08 80
RSP: 0018:ffffc9001d247768 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc9001d247a80 RCX: 0000000000000000
RDX: 1ffff1100751ce01 RSI: ffffffff81ad7b40 RDI: ffff88803a8e7008
RBP: ffff88803a8e7000 R08: 0000000000000000 R09: ffffea0001ab61f3
R10: ffffffff81ad7b32 R11: 0000000000000000 R12: 0000000000000065
R13: ffff888094f11038 R14: ffffea0001ab61c0 R15: ffffc9001d247aa8
 __tlb_remove_page include/asm-generic/tlb.h:440 [inline]
 zap_pte_range mm/memory.c:1272 [inline]
 zap_pmd_range mm/memory.c:1384 [inline]
 zap_pud_range mm/memory.c:1413 [inline]
 zap_p4d_range mm/memory.c:1434 [inline]
 unmap_page_range+0xf22/0x2890 mm/memory.c:1455
 unmap_single_vma+0x198/0x300 mm/memory.c:1500
 unmap_vmas+0x16d/0x2f0 mm/memory.c:1532
 exit_mmap+0x1d0/0x620 mm/mmap.c:3202
 __mmput+0x122/0x470 kernel/fork.c:1101
 mmput+0x58/0x60 kernel/fork.c:1122
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xae2/0x2a50 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2150 kernel/signal.c:2796
 arch_do_signal_or_restart+0x2a9/0x1eb0 arch/x86/kernel/signal.c:789
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: Unable to access opcode bytes at RIP 0x4665af.
RSP: 002b:00007f4980592218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 0000000000a9fb1f R14: 00007f4980592300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 4545 Comm: syz-executor.3 Not tainted 5.13.0-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_lvl+0xcd/0x134 lib/dump_stack.c:96
 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+0x25e/0x3f0 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq.cold+0x9f/0x747 kernel/rcu/tree.c:2649
 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:1421
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
RIP: 0010:atomic_dec_and_test include/asm-generic/atomic-instrumented.h:542 [inline]
RIP: 0010:page_ref_dec_and_test include/linux/page_ref.h:148 [inline]
RIP: 0010:put_page_testzero include/linux/mm.h:741 [inline]
RIP: 0010:release_pages+0x415/0x20a0 mm/swap.c:940
Code: 17 00 00 41 8b 47 34 31 ff 89 c6 89 44 24 18 e8 81 e9 d7 ff 8b 44 24 18 85 c0 0f 84 c7 04 00 00 e8 30 e2 d7 ff be 04 00 00 00 <4c> 89 e7 e8 43 a3 1d 00 f0 41 ff 0c 24 41 0f 94 c4 31 ff 44 89 e6
RSP: 0018:ffffc90019bf7648 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888090633018 RCX: 0000000000000000
RDX: ffff888072323880 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffea0001ace3f7
R10: ffffffff819da7ef R11: 0000000000000000 R12: ffffea0001ace3f4
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffea0001ace3c0
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:249
 zap_pte_range mm/memory.c:1335 [inline]
 zap_pmd_range mm/memory.c:1384 [inline]
 zap_pud_range mm/memory.c:1413 [inline]
 zap_p4d_range mm/memory.c:1434 [inline]
 unmap_page_range+0x1b86/0x2890 mm/memory.c:1455
 unmap_single_vma+0x198/0x300 mm/memory.c:1500
 unmap_vmas+0x16d/0x2f0 mm/memory.c:1532
 exit_mmap+0x1d0/0x620 mm/mmap.c:3202
 __mmput+0x122/0x470 kernel/fork.c:1101
 mmput+0x58/0x60 kernel/fork.c:1122
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xae2/0x2a50 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2150 kernel/signal.c:2796
 arch_do_signal_or_restart+0x2a9/0x1eb0 arch/x86/kernel/signal.c:789
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: Unable to access opcode bytes at RIP 0x4665af.
RSP: 002b:00007f4980592218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 0000000000a9fb1f R14: 00007f4980592300 R15: 0000000000022000