rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10484 ticks this GP) idle=a96/1/0x4000000000000000 softirq=26673/26682 fqs=46 
	(t=10501 jiffies g=36593 q=1549)
rcu: rcu_preempt kthread starved for 9939 jiffies! g36593 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:R  running task     stack:26352 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4339 [inline]
 __schedule+0xb98/0x1120 kernel/sched/core.c:5147
 schedule+0x14b/0x200 kernel/sched/core.c:5226
 schedule_timeout+0x1aa/0x2c0 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0x112d/0x2190 kernel/rcu/tree.c:2177
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 17164 Comm: syz-executor.4 Not tainted 5.13.0-rc3-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+0x202/0x31e lib/dump_stack.c:120
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_check_gp_kthread_starvation+0x20d/0x250 kernel/rcu/tree_stall.h:478
 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq+0x1d08/0x2a30 kernel/rcu/tree.c:2649
 update_process_times+0x197/0x200 kernel/time/timer.c:1796
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1373
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:191
Code: f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 ea 07 04 f8 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 1f d3 93 f7 65 8b 05 50 e4 3e 76 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90000007420 EFLAGS: 00000206
RAX: 1ffff92000000e88 RBX: ffff88802bc9d678 RCX: ffffffff8161cee9
RDX: dffffc0000000000 RSI: 0000000000000304 RDI: 0000000000000001
RBP: ffffc900000074b0 R08: dffffc0000000000 R09: fffffbfff204dbce
R10: fffffbfff204dbce R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92000000e84 R14: ffffc90000007440 R15: 0000000000000a02
 ieee80211_rx_h_mgmt net/mac80211/rx.c:3711 [inline]
 ieee80211_rx_handlers+0xa329/0xee90 net/mac80211/rx.c:3878
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3908 [inline]
 ieee80211_prepare_and_rx_handle+0x2522/0x51f0 net/mac80211/rx.c:4622
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4782 [inline]
 ieee80211_rx_list+0x1420/0x2a70 net/mac80211/rx.c:4904
 ieee80211_rx_napi+0x14b/0x360 net/mac80211/rx.c:4927
 ieee80211_rx include/net/mac80211.h:4528 [inline]
 ieee80211_tasklet_handler+0x120/0x1d0 net/mac80211/main.c:235
 tasklet_action_common+0x389/0x520 kernel/softirq.c:784
 __do_softirq+0x372/0x7a6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x245/0x280 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:lock_is_held_type+0x5b/0x180 kernel/locking/lockdep.c:5551
Code: eb b1 41 76 85 c0 0f 85 e3 00 00 00 65 4c 8b 2c 25 80 ef 01 00 41 83 bd f4 09 00 00 00 0f 85 cc 00 00 00 41 89 f6 49 89 ff 9c <8f> 04 24 4c 8b 24 24 fa 48 c7 c7 40 a5 2e 8a e8 11 12 00 00 65 ff
RSP: 0018:ffffc9000367f3f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000080000002
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8cf15ba0
RBP: ffffc9000367f4c8 R08: dffffc0000000000 R09: fffffbfff1c7047e
R10: fffffbfff1c7047e R11: 0000000000000000 R12: 0000000000000000
R13: ffff88805661d4c0 R14: 00000000ffffffff R15: ffffffff8cf15ba0
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x87/0x110 kernel/rcu/update.c:125
 trace_lock_acquire+0x6b/0x180 include/trace/events/lock.h:13
 lock_acquire+0xa9/0x720 kernel/locking/lockdep.c:5483
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 inode_sb_list_del fs/inode.c:471 [inline]
 evict+0x161/0x620 fs/inode.c:573
 __dentry_kill+0x43e/0x660 fs/dcache.c:582
 dentry_kill fs/dcache.c:695 [inline]
 dput+0x45e/0x6f0 fs/dcache.c:888
 find_next_child fs/libfs.c:264 [inline]
 simple_recursive_removal+0x2b5/0x6d0 fs/libfs.c:279
 debugfs_remove+0x45/0x60 fs/debugfs/inode.c:729
 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:836 [inline]
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1013 [inline]
 kvm_put_kvm+0xce/0xd10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1055
 kvm_vm_release+0x42/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1078
 __fput+0x352/0x7b0 fs/file_table.c:280
 task_work_run+0x146/0x1c0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0x736/0x23d0 kernel/exit.c:826
 do_group_exit+0x168/0x2d0 kernel/exit.c:923
 get_signal+0x1770/0x2180 kernel/signal.c:2835
 arch_do_signal_or_restart+0x8e/0x6c0 arch/x86/kernel/signal.c:789
 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+0xac/0x200 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x26/0x70 kernel/entry/common.c:301
 do_syscall_64+0x4b/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466397
Code: Unable to access opcode bytes at RIP 0x46636d.
RSP: 002b:00007fdc7ea1f5f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000020fe8000 RCX: 0000000000466397
RDX: 00007fdc7ea1fd30 RSI: 000000004020ae46 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000
R13: 00007fdc7ea1fd30 R14: 000000000000000c R15: 0000000020ff3000
NMI backtrace for cpu 0
CPU: 0 PID: 17164 Comm: syz-executor.4 Not tainted 5.13.0-rc3-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+0x202/0x31e lib/dump_stack.c:120
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x22d/0x390 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+0x1d0d/0x2a30 kernel/rcu/tree.c:2649
 update_process_times+0x197/0x200 kernel/time/timer.c:1796
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1373
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:191
Code: f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 ea 07 04 f8 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 1f d3 93 f7 65 8b 05 50 e4 3e 76 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90000007420 EFLAGS: 00000206
RAX: 1ffff92000000e88 RBX: ffff88802bc9d678 RCX: ffffffff8161cee9
RDX: dffffc0000000000 RSI: 0000000000000304 RDI: 0000000000000001
RBP: ffffc900000074b0 R08: dffffc0000000000 R09: fffffbfff204dbce
R10: fffffbfff204dbce R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92000000e84 R14: ffffc90000007440 R15: 0000000000000a02
 ieee80211_rx_h_mgmt net/mac80211/rx.c:3711 [inline]
 ieee80211_rx_handlers+0xa329/0xee90 net/mac80211/rx.c:3878
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3908 [inline]
 ieee80211_prepare_and_rx_handle+0x2522/0x51f0 net/mac80211/rx.c:4622
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4782 [inline]
 ieee80211_rx_list+0x1420/0x2a70 net/mac80211/rx.c:4904
 ieee80211_rx_napi+0x14b/0x360 net/mac80211/rx.c:4927
 ieee80211_rx include/net/mac80211.h:4528 [inline]
 ieee80211_tasklet_handler+0x120/0x1d0 net/mac80211/main.c:235
 tasklet_action_common+0x389/0x520 kernel/softirq.c:784
 __do_softirq+0x372/0x7a6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x245/0x280 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:lock_is_held_type+0x5b/0x180 kernel/locking/lockdep.c:5551
Code: eb b1 41 76 85 c0 0f 85 e3 00 00 00 65 4c 8b 2c 25 80 ef 01 00 41 83 bd f4 09 00 00 00 0f 85 cc 00 00 00 41 89 f6 49 89 ff 9c <8f> 04 24 4c 8b 24 24 fa 48 c7 c7 40 a5 2e 8a e8 11 12 00 00 65 ff
RSP: 0018:ffffc9000367f3f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000080000002
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8cf15ba0
RBP: ffffc9000367f4c8 R08: dffffc0000000000 R09: fffffbfff1c7047e
R10: fffffbfff1c7047e R11: 0000000000000000 R12: 0000000000000000
R13: ffff88805661d4c0 R14: 00000000ffffffff R15: ffffffff8cf15ba0
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x87/0x110 kernel/rcu/update.c:125
 trace_lock_acquire+0x6b/0x180 include/trace/events/lock.h:13
 lock_acquire+0xa9/0x720 kernel/locking/lockdep.c:5483
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 inode_sb_list_del fs/inode.c:471 [inline]
 evict+0x161/0x620 fs/inode.c:573
 __dentry_kill+0x43e/0x660 fs/dcache.c:582
 dentry_kill fs/dcache.c:695 [inline]
 dput+0x45e/0x6f0 fs/dcache.c:888
 find_next_child fs/libfs.c:264 [inline]
 simple_recursive_removal+0x2b5/0x6d0 fs/libfs.c:279
 debugfs_remove+0x45/0x60 fs/debugfs/inode.c:729
 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:836 [inline]
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1013 [inline]
 kvm_put_kvm+0xce/0xd10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1055
 kvm_vm_release+0x42/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1078
 __fput+0x352/0x7b0 fs/file_table.c:280
 task_work_run+0x146/0x1c0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0x736/0x23d0 kernel/exit.c:826
 do_group_exit+0x168/0x2d0 kernel/exit.c:923
 get_signal+0x1770/0x2180 kernel/signal.c:2835
 arch_do_signal_or_restart+0x8e/0x6c0 arch/x86/kernel/signal.c:789
 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+0xac/0x200 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x26/0x70 kernel/entry/common.c:301
 do_syscall_64+0x4b/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466397
Code: Unable to access opcode bytes at RIP 0x46636d.
RSP: 002b:00007fdc7ea1f5f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000020fe8000 RCX: 0000000000466397
RDX: 00007fdc7ea1fd30 RSI: 000000004020ae46 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000
R13: 00007fdc7ea1fd30 R14: 000000000000000c R15: 0000000020ff3000