rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10476 ticks this GP) idle=de6/1/0x4000000000000000 softirq=182389/182390 fqs=0 
	(t=10501 jiffies g=381085 q=70)
rcu: rcu_preempt kthread starved for 10502 jiffies! g381085 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:29168 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x911/0x21b0 kernel/sched/core.c:5073
 schedule+0xcf/0x270 kernel/sched/core.c:5152
 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2005 [inline]
 rcu_gp_kthread+0xd07/0x2250 kernel/rcu/tree.c:2178
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 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: 11033 Comm: syz-executor.4 Not tainted 5.12.0-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:79 [inline]
 dump_stack+0x141/0x1d7 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_check_gp_kthread_starvation+0x1c7/0x1e4 kernel/rcu/tree_stall.h:478
 print_cpu_stall kernel/rcu/tree_stall.h:620 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:697 [inline]
 rcu_pending kernel/rcu/tree.c:3830 [inline]
 rcu_sched_clock_irq.cold+0x4f2/0x11dd 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: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+0x146/0x540 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191
Code: 74 24 10 e8 6a bd 4d f8 48 89 ef e8 a2 73 4e f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> 83 41 42 f8 65 8b 05 4c 07 f6 76 85 c0 74 0a 5b 5d c3 e8 f0 fc
RSP: 0018:ffffc900000078e8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1f6753a
RDX: 0000000000000000 RSI: 0000000000000303 RDI: 0000000000000001
RBP: ffff8880218e5650 R08: 0000000000000001 R09: ffffffff8fae298f
R10: 0000000000000001 R11: 0000000000000080 R12: dffffc0000000000
R13: 0000000000000080 R14: ffff888083ca4c50 R15: 0000000000000000
 ieee80211_rx_h_mgmt net/mac80211/rx.c:3626 [inline]
 ieee80211_rx_handlers+0x3b5a/0xae60 net/mac80211/rx.c:3793
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3823 [inline]
 ieee80211_prepare_and_rx_handle+0x22ad/0x5070 net/mac80211/rx.c:4537
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4635 [inline]
 ieee80211_rx_list+0x930/0x2680 net/mac80211/rx.c:4819
 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4842
 ieee80211_rx include/net/mac80211.h:4528 [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:lock_is_held_type+0xfd/0x140 kernel/locking/lockdep.c:5555
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 3e 7c f8 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc900013df6c8 EFLAGS: 00000282
RAX: 0000000000000046 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8bf74460 R08: 0000000000000001 R09: ffffffff8fae28c7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880752cb880
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8880752cc270
 lock_is_held include/linux/lockdep.h:278 [inline]
 schedule_debug kernel/sched/core.c:4841 [inline]
 __schedule+0x152f/0x21b0 kernel/sched/core.c:4967
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5530
 irqentry_exit_cond_resched kernel/entry/common.c:392 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:384 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:428
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 kernel/kcov.c:197
Code: 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 40 00 65 8b 05 59 f9 8d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 <a9> 00 01 ff 00 74 0e 85 c9 74 35 8b 82 34 15 00 00 85 c0 74 2b 8b
RSP: 0018:ffffc900013df8a0 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffffffff8a67f623 RCX: 0000000000000000
RDX: ffff8880752cb880 RSI: ffffffff83e42ede RDI: 0000000000000003
RBP: ffffc900013df9c0 R08: 0000000000000001 R09: 0000000000000025
R10: ffffffff83e42e7e R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8a67f623 R14: 1ffff9200027bf18 R15: 0000000000000025
 format_decode+0x18e/0xad0 lib/vsprintf.c:2386
 vsnprintf+0x155/0x14f0 lib/vsprintf.c:2603
 kvasprintf+0xd3/0x150 lib/kasprintf.c:29
 kvasprintf_const+0x60/0x190 lib/kasprintf.c:49
 kobject_set_name_vargs+0x56/0x150 lib/kobject.c:289
 kobject_add_varg lib/kobject.c:384 [inline]
 kobject_init_and_add+0xc9/0x160 lib/kobject.c:473
 rx_queue_add_kobject net/core/net-sysfs.c:1009 [inline]
 net_rx_queue_update_kobjects+0x233/0x4e0 net/core/net-sysfs.c:1060
 register_queue_kobjects net/core/net-sysfs.c:1711 [inline]
 netdev_register_kobject+0x275/0x430 net/core/net-sysfs.c:1959
 register_netdevice+0xd33/0x1500 net/core/dev.c:10262
 __tun_chr_ioctl.isra.0+0x2c04/0x4280 drivers/net/tun.c:2746
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f93bf16a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 00000000200000c0 RSI: 00000000400454ca RDI: 0000000000000004
RBP: 00000000004bfbb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fff3675bd1f R14: 00007f93bf16a300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 11033 Comm: syz-executor.4 Not tainted 5.12.0-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:79 [inline]
 dump_stack+0x141/0x1d7 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: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+0x146/0x540 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191
Code: 74 24 10 e8 6a bd 4d f8 48 89 ef e8 a2 73 4e f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> 83 41 42 f8 65 8b 05 4c 07 f6 76 85 c0 74 0a 5b 5d c3 e8 f0 fc
RSP: 0018:ffffc900000078e8 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1f6753a
RDX: 0000000000000000 RSI: 0000000000000303 RDI: 0000000000000001
RBP: ffff8880218e5650 R08: 0000000000000001 R09: ffffffff8fae298f
R10: 0000000000000001 R11: 0000000000000080 R12: dffffc0000000000
R13: 0000000000000080 R14: ffff888083ca4c50 R15: 0000000000000000
 ieee80211_rx_h_mgmt net/mac80211/rx.c:3626 [inline]
 ieee80211_rx_handlers+0x3b5a/0xae60 net/mac80211/rx.c:3793
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3823 [inline]
 ieee80211_prepare_and_rx_handle+0x22ad/0x5070 net/mac80211/rx.c:4537
 __ieee80211_rx_handle_packet net/mac80211/rx.c:4635 [inline]
 ieee80211_rx_list+0x930/0x2680 net/mac80211/rx.c:4819
 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4842
 ieee80211_rx include/net/mac80211.h:4528 [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:lock_is_held_type+0xfd/0x140 kernel/locking/lockdep.c:5555
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 3e 7c f8 76 83 f8 01 75 29 9c 58 f6 c4 02 75 3d 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb b9 0f 0b 48
RSP: 0018:ffffc900013df6c8 EFLAGS: 00000282
RAX: 0000000000000046 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8bf74460 R08: 0000000000000001 R09: ffffffff8fae28c7
R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880752cb880
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8880752cc270
 lock_is_held include/linux/lockdep.h:278 [inline]
 schedule_debug kernel/sched/core.c:4841 [inline]
 __schedule+0x152f/0x21b0 kernel/sched/core.c:4967
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5530
 irqentry_exit_cond_resched kernel/entry/common.c:392 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:384 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:428
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 kernel/kcov.c:197
Code: 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 40 00 65 8b 05 59 f9 8d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 00 f0 01 00 <a9> 00 01 ff 00 74 0e 85 c9 74 35 8b 82 34 15 00 00 85 c0 74 2b 8b
RSP: 0018:ffffc900013df8a0 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffffffff8a67f623 RCX: 0000000000000000
RDX: ffff8880752cb880 RSI: ffffffff83e42ede RDI: 0000000000000003
RBP: ffffc900013df9c0 R08: 0000000000000001 R09: 0000000000000025
R10: ffffffff83e42e7e R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff8a67f623 R14: 1ffff9200027bf18 R15: 0000000000000025
 format_decode+0x18e/0xad0 lib/vsprintf.c:2386
 vsnprintf+0x155/0x14f0 lib/vsprintf.c:2603
 kvasprintf+0xd3/0x150 lib/kasprintf.c:29
 kvasprintf_const+0x60/0x190 lib/kasprintf.c:49
 kobject_set_name_vargs+0x56/0x150 lib/kobject.c:289
 kobject_add_varg lib/kobject.c:384 [inline]
 kobject_init_and_add+0xc9/0x160 lib/kobject.c:473
 rx_queue_add_kobject net/core/net-sysfs.c:1009 [inline]
 net_rx_queue_update_kobjects+0x233/0x4e0 net/core/net-sysfs.c:1060
 register_queue_kobjects net/core/net-sysfs.c:1711 [inline]
 netdev_register_kobject+0x275/0x430 net/core/net-sysfs.c:1959
 register_netdevice+0xd33/0x1500 net/core/dev.c:10262
 __tun_chr_ioctl.isra.0+0x2c04/0x4280 drivers/net/tun.c:2746
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f93bf16a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 00000000200000c0 RSI: 00000000400454ca RDI: 0000000000000004
RBP: 00000000004bfbb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fff3675bd1f R14: 00007f93bf16a300 R15: 0000000000022000