rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10311 ticks this GP) idle=a32/1/0x4000000000000000 softirq=14315/14317 fqs=5072 
	(t=10502 jiffies g=16469 q=305)
NMI backtrace for cpu 0
CPU: 0 PID: 10634 Comm: syz-executor.3 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
 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__rcu_read_unlock+0x7b/0x500 kernel/rcu/tree_plugin.h:402
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 87 01 00 00 8b 85 d0 03 00 00 85 c0 75 51 <65> 48 8b 2c 25 00 f0 01 00 48 8d bd cc 03 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc90000007e20 EFLAGS: 00000202
RAX: 000000000207874a RBX: ffff8880b9c35fc0 RCX: 1ffffffff1f578a2
RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000
RBP: ffffffff8bf7c940 R08: 0000000000000001 R09: ffffffff8faaf887
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000200 R14: 0000000000000000 R15: 0000000000000001
 rcu_read_unlock include/linux/rcupdate.h:709 [inline]
 ieee80211_rx_napi+0x132/0x3d0 net/mac80211/rx.c:4843
 ieee80211_rx include/net/mac80211.h:4524 [inline]
 ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235
 tasklet_action_common.constprop.0+0x1d7/0x2d0 kernel/softirq.c:557
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
 invoke_softirq kernel/softirq.c:221 [inline]
 __irq_exit_rcu kernel/softirq.c:422 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
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 ba 90 54 f8 48 89 ef e8 32 46 55 f8 80 e7 02 74 06 e8 68 a0 74 f8 fb bf 01 00 00 00 <e8> ad 41 49 f8 65 8b 05 96 56 fd 76 85 c0 74 03 5b 5d c3 e8 f1 ab
RSP: 0018:ffffc9000257f5b0 EFLAGS: 00000206
RAX: 0000000001136081 RBX: 0000000000000246 RCX: 1ffffffff1f578a2
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff888010dad850 R08: 0000000000000001 R09: ffffffff8faaf887
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b9c308d0
R13: ffffea0001356288 R14: 0000000000000002 R15: 0000000000000000
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1470 [inline]
 pagevec_lru_move_fn+0x4e0/0x890 mm/swap.c:223
 lru_add_drain_cpu+0x5c7/0x8c0 mm/swap.c:629
 lru_add_drain+0x108/0x430 mm/swap.c:710
 free_pages_and_swap_cache+0x18/0x90 mm/swap_state.c:328
 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:1342 [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+0x1a7f/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:3218
 __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:00007f2e2f7c3188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 0000000000278000 RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006
RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fff909f4d5f R14: 00007f2e2f7c3300 R15: 0000000000022000