rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (10421 ticks this GP) idle=e0a/1/0x4000000000000000 softirq=20663/20664 fqs=5235 (t=10502 jiffies g=20529 q=376) NMI backtrace for cpu 1 CPU: 1 PID: 13030 Comm: syz-executor.5 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 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+0x1e3/0x21e kernel/rcu/tree_stall.h:337 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline] check_cpu_stall kernel/rcu/tree_stall.h:643 [inline] rcu_pending kernel/rcu/tree.c:3751 [inline] rcu_sched_clock_irq.cold+0x472/0xec3 kernel/rcu/tree.c:2580 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1376 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1ce/0xea0 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102 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:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191 Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 ea 9e 6d f8 48 89 ef e8 72 53 6e f8 f6 c7 02 75 1a 53 9d 01 00 00 00 e8 b1 6d 62 f8 65 8b 05 3a 06 19 77 85 c0 74 0a 5b RSP: 0018:ffffc90000d90eb0 EFLAGS: 00000246 RAX: 0000000002a6d6da RBX: 0000000000000246 RCX: ffffffff81560c87 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: ffff88806f6e1408 R08: 0000000000000001 R09: ffffffff8ebb0777 R10: fffffbfff1d760ee R11: 0000000000000001 R12: ffff888075846a00 R13: ffff88806f6e1408 R14: ffff888075847c80 R15: 0000000000000001 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] skb_dequeue+0x125/0x180 net/core/skbuff.c:3036 ieee80211_tasklet_handler+0x37/0x130 net/mac80211/main.c:228 tasklet_action_common.constprop.0+0x22f/0x2d0 kernel/softirq.c:560 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298 asm_call_irq_on_stack+0xf/0x20 __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:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x132/0x200 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__mod_node_page_state+0x2e/0x130 mm/vmstat.c:339 Code: 00 00 00 fc ff df 41 56 41 55 41 54 55 48 89 fd 48 81 c7 00 4e 00 00 53 48 89 d3 48 89 fa 48 c1 ea 03 48 83 ec 08 80 3c 02 00 <0f> 85 cf 00 00 00 4c 8b b5 00 4e 00 00 41 89 f5 83 ee 05 83 fe 01 RSP: 0018:ffffc900016bf710 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffffffffffffff RCX: ffffffff81a6afc3 RDX: 1ffff11027ffffc0 RSI: 0000000000000012 RDI: ffff88813ffffe00 RBP: ffff88813fffb000 R08: 0000000000000001 R09: ffffea0000aacab3 R10: ffffffffffffffff R11: 0000000000000000 R12: ffffea0000aaca88 R13: ffffea0000aaca80 R14: 00000000ffffffff R15: ffff88813fffb000 __mod_lruvec_page_state include/linux/memcontrol.h:842 [inline] page_remove_file_rmap mm/rmap.c:1269 [inline] page_remove_rmap+0x1451/0x1c00 mm/rmap.c:1331 zap_pte_range mm/memory.c:1253 [inline] zap_pmd_range mm/memory.c:1357 [inline] zap_pud_range mm/memory.c:1386 [inline] zap_p4d_range mm/memory.c:1407 [inline] unmap_page_range+0xe30/0x2640 mm/memory.c:1428 unmap_single_vma+0x198/0x300 mm/memory.c:1473 unmap_vmas+0x168/0x2e0 mm/memory.c:1505 exit_mmap+0x2b1/0x530 mm/mmap.c:3220 __mmput+0x122/0x470 kernel/fork.c:1081 mmput+0x53/0x60 kernel/fork.c:1102 exit_mm kernel/exit.c:500 [inline] do_exit+0xaa9/0x29f0 kernel/exit.c:810 do_group_exit+0x125/0x310 kernel/exit.c:920 get_signal+0x42a/0x1fb0 kernel/signal.c:2792 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+0x124/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e159 Code: Unable to access opcode bytes at RIP 0x45e12f. RSP: 002b:00007f8aa4a69c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: 0000000000000003 RBX: 0000000000000003 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 000000000000002c RBP: 000000000119c110 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffcf4ce9f0f R14: 00007f8aa4a6a9c0 R15: 000000000119c0dc