rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10212 ticks this GP) idle=9c2/1/0x4000000000000000 softirq=9223/9224 fqs=0 
	(t=10500 jiffies g=8733 q=37)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g8733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=59964
rcu: rcu_preempt kthread starved for 10500 jiffies! g8733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:I stack:28872 pid:   13 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8657 Comm: syz-executor607 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:queued_write_lock_slowpath+0x131/0x270 kernel/locking/qrwlock.c:76
Code: 00 00 00 00 fc ff df 49 01 c7 41 83 c6 03 41 0f b6 07 41 38 c6 7c 08 84 c0 0f 85 fe 00 00 00 8b 03 3d 00 01 00 00 74 19 f3 90 <41> 0f b6 07 41 38 c6 7c ec 84 c0 74 e8 48 89 df e8 ea c7 5c 00 eb
RSP: 0018:ffffc900023e7a60 EFLAGS: 00000006
RAX: 0000000000000300 RBX: ffffffff8bc0a080 RCX: ffffffff8159eafa
RDX: fffffbfff1781411 RSI: 0000000000000004 RDI: ffffffff8bc0a080
RBP: 00000000000000ff R08: 0000000000000001 R09: ffffffff8bc0a083
R10: fffffbfff1781410 R11: 0000000000000000 R12: 1ffff9200047cf4d
R13: ffffffff8bc0a084 R14: 0000000000000003 R15: fffffbfff1781410
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000019960000 CR4: 0000000000350ee0
Call Trace:
 queued_write_lock include/asm-generic/qrwlock.h:97 [inline]
 do_raw_write_lock+0x1ce/0x280 kernel/locking/spinlock_debug.c:207
 exit_notify kernel/exit.c:667 [inline]
 do_exit+0xcaf/0x2ae0 kernel/exit.c:845
 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: 0033:0x44edf9
Code: Unable to access opcode bytes at RIP 0x44edcf.
RSP: 002b:00007efd0e304308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000004cd4b8 RCX: 000000000044edf9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cd4b8
RBP: 00000000004cd4b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cd4bc
R13: 000000000049c4e0 R14: 6f68762f7665642f R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 8654 Comm: syz-executor607 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
 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:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__iterate_interfaces+0x23f/0x520 net/mac80211/util.c:797
Code: 24 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 c2 02 00 00 48 8b 44 24 10 48 8b 98 10 24 00 00 <e8> 0c b0 9e 00 31 ff 89 c5 89 c6 e8 91 aa 10 f9 85 ed 74 1e e8 08
RSP: 0018:ffffc90000007da8 EFLAGS: 00000246
RAX: ffff88801bbc8d00 RBX: 0000000000000000 RCX: 0000000000000100
RDX: 1ffff11003779622 RSI: ffffffff8862b0ec RDI: ffff88801bbcb110
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff85193411 R11: 0000000000000000 R12: ffff888023de9dd8
R13: 0000000000000000 R14: ffff88801bbca680 R15: 0000000000000002
 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1852
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1583
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343
 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:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:mm_update_next_owner+0x44e/0x7a0 kernel/exit.c:388
Code: fb ff ff 48 89 f8 48 c1 e8 03 0f b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 b5 02 00 00 44 8b b5 dc fb ff ff <31> ff 41 81 e6 00 00 20 00 44 89 f6 e8 61 eb 2e 00 45 85 f6 0f 85
RSP: 0018:ffffc900024a7b18 EFLAGS: 00000246
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81447020 RDI: ffff888017c7536c
RBP: ffff888017c75790 R08: 0000000000000000 R09: ffffffff8bc0a083
R10: ffffffff8144705f R11: 0000000000000001 R12: ffff88801bc9bf00
R13: ffff888017c75340 R14: 0000000000a20840 R15: ffff888140760010
 exit_mm kernel/exit.c:500 [inline]
 do_exit+0xb67/0x2ae0 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: 0033:0x44edf9
Code: Unable to access opcode bytes at RIP 0x44edcf.
RSP: 002b:00007efd0e325308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000004cd4a8 RCX: 000000000044edf9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cd4a8
RBP: 00000000004cd4a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cd4ac
R13: 000000000049c4e0 R14: 6f68762f7665642f R15: 0000000000022000
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8657 Comm: syz-executor607 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:queued_write_lock_slowpath+0x131/0x270 kernel/locking/qrwlock.c:76
Code: 00 00 00 00 fc ff df 49 01 c7 41 83 c6 03 41 0f b6 07 41 38 c6 7c 08 84 c0 0f 85 fe 00 00 00 8b 03 3d 00 01 00 00 74 19 f3 90 <41> 0f b6 07 41 38 c6 7c ec 84 c0 74 e8 48 89 df e8 ea c7 5c 00 eb
RSP: 0018:ffffc900023e7a60 EFLAGS: 00000006
RAX: 0000000000000300 RBX: ffffffff8bc0a080 RCX: ffffffff8159eafa
RDX: fffffbfff1781411 RSI: 0000000000000004 RDI: ffffffff8bc0a080
RBP: 00000000000000ff R08: 0000000000000001 R09: ffffffff8bc0a083
R10: fffffbfff1781410 R11: 0000000000000000 R12: 1ffff9200047cf4d
R13: ffffffff8bc0a084 R14: 0000000000000003 R15: fffffbfff1781410
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000019960000 CR4: 0000000000350ee0
Call Trace:
 queued_write_lock include/asm-generic/qrwlock.h:97 [inline]
 do_raw_write_lock+0x1ce/0x280 kernel/locking/spinlock_debug.c:207
 exit_notify kernel/exit.c:667 [inline]
 do_exit+0xcaf/0x2ae0 kernel/exit.c:845
 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: 0033:0x44edf9
Code: Unable to access opcode bytes at RIP 0x44edcf.
RSP: 002b:00007efd0e304308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000004cd4b8 RCX: 000000000044edf9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cd4b8
RBP: 00000000004cd4b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cd4bc
R13: 000000000049c4e0 R14: 6f68762f7665642f R15: 0000000000022000