rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10127 ticks this GP) idle=dc6/1/0x4000000000000000 softirq=11800/11802 fqs=5238 
	(t=10502 jiffies g=10717 q=404)
NMI backtrace for cpu 0
CPU: 0 PID: 10135 Comm: syz-executor.0 Not tainted 5.10.0-rc7-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+0x107/0x163 lib/dump_stack.c:118
 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:331
 print_cpu_stall kernel/rcu/tree_stall.h:563 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:637 [inline]
 rcu_pending kernel/rcu/tree.c:3694 [inline]
 rcu_sched_clock_irq.cold+0x472/0xee8 kernel/rcu/tree.c:2567
 update_process_times+0x77/0xd0 kernel/time/timer.c:1709
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
 __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:1080 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097
 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:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
RIP: 0010:do_raw_spin_lock+0x85/0x2b0 kernel/locking/spinlock_debug.c:112
Code: 00 00 00 48 89 4c 24 60 31 c9 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 db 01 00 00 8b 45 04 <3d> ad 4e ad de 0f 85 77 01 00 00 4c 8d 6d 10 48 b8 00 00 00 00 00
RSP: 0018:ffffc90000007878 EFLAGS: 00000246
RAX: 00000000dead4ead RBX: 1ffff92000000f10 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000302 RDI: ffff8880785514a4
RBP: ffff8880785514a0 R08: 0000000000000000 R09: ffffffff8ebaf747
R10: fffffbfff1d75ee8 R11: 0000000000000001 R12: ffff888025e0e850
R13: 0000000000000001 R14: ffffc90000007d48 R15: ffffc90000007d68
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 ieee80211_rx_handlers+0xd7/0xae50 net/mac80211/rx.c:3769
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3834 [inline]
 ieee80211_prepare_and_rx_handle+0x2482/0x6360 net/mac80211/rx.c:4518
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4579 [inline]
 ieee80211_rx_list+0xdf3/0x23d0 net/mac80211/rx.c:4759
 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4780
 ieee80211_rx include/net/mac80211.h:4502 [inline]
 ieee80211_tasklet_handler+0xd3/0x130 net/mac80211/main.c:235
 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
 </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: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:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:4789
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 52 4c 64 f8 e8 7d b2 8e f8 fb bf 01 00 00 00 <e8> 82 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 c0 34 64
RSP: 0018:ffffc90001f7f498 EFLAGS: 00000206
RAX: 0000000000cbc86f RBX: ffff88807812b480 RCX: 1ffffffff19d8e91
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed100f025690 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit_cond_resched kernel/entry/common.c:357 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:349 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:387
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:999 [inline]
RIP: 0010:debug_check_no_obj_freed+0x213/0x420 lib/debugobjects.c:1018
Code: f6 fd 4c 8b 44 24 38 e9 17 ff ff ff 44 01 64 24 0c 45 89 e5 48 8b 74 24 28 48 8b 7c 24 10 e8 84 61 2d 05 44 39 2d c5 57 32 09 <7d> 07 44 89 2d bc 57 32 09 48 81 44 24 18 00 10 00 00 48 8b 44 24
RSP: 0018:ffffc90001f7f568 EFLAGS: 00000202
RAX: 0000000080000000 RBX: ffff88805ba00000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000003
R13: 0000000000000003 R14: dead000000000100 R15: dffffc0000000000
 free_pages_prepare mm/page_alloc.c:1261 [inline]
 __free_pages_ok+0x241/0xc90 mm/page_alloc.c:1519
 release_pages+0x53e/0x1690 mm/swap.c:922
 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:1319 [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+0x1a75/0x2640 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:1079
 mmput+0x53/0x60 kernel/fork.c:1100
 exit_mm kernel/exit.c:486 [inline]
 do_exit+0xa72/0x29b0 kernel/exit.c:796
 do_group_exit+0x125/0x310 kernel/exit.c:906
 get_signal+0x42a/0x1f10 kernel/signal.c:2758
 arch_do_signal+0x82/0x2390 arch/x86/kernel/signal.c:811
 exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
 exit_to_user_mode_prepare+0x100/0x1a0 kernel/entry/common.c:191
 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e159
Code: Unable to access opcode bytes at RIP 0x45e12f.
RSP: 002b:00007fd4ebe18c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000000020ffc000 RBX: 0000000000000006 RCX: 000000000045e159
RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffc000
RBP: 000000000119bfd8 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffc61811a0f R14: 00007fd4ebe199c0 R15: 000000000119bf8c