rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=324477, q=42)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4295134994-4295124493), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g324477 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:28816 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x934/0x2710 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0xd1a/0x2300 kernel/rcu/tree.c:2177
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 13780 Comm: syz-executor.0 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x3ba/0xb40 kernel/locking/qspinlock.c:508
Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 72 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f
RSP: 0018:ffffc90000dc0a30 EFLAGS: 00000206
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffffffff18ee230
RDX: 0000000000000001 RSI: ffffffff817b97b1 RDI: ffffffff81331571
RBP: ffffffff8c771180 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817b9779 R11: 0000000000000080 R12: 0000000000006dad
R13: fffffbfff18ee230 R14: 0000000000000001 R15: ffff8880b9d52840
FS:  00007f16f81c8700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000525ef0 CR3: 0000000020490000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113
 spin_lock include/linux/spinlock.h:354 [inline]
 mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1516
 mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784
 mac80211_hwsim_beacon_tx+0x4b7/0x920 drivers/net/wireless/mac80211_hwsim.c:1838
 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618
 __do_softirq+0x29b/0x9bd kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 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:638
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:6328
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 0e 2e f8 e8 bd 36 5a f8 fb bf 01 00 00 00 <e8> b2 cd ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 60 fd 2d
RSP: 0018:ffffc900021ef8e8 EFLAGS: 00000202
RAX: 0000000000002343 RBX: ffff8880280e1c40 RCX: 1ffffffff1ad5639
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed100501c388 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817b9798 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit+0x31/0x80 kernel/entry/common.c:427
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:string+0x0/0x3d0 lib/vsprintf.c:715
Code: ef e8 24 fe cc fd e9 68 fb ff ff e8 9a aa 31 05 48 89 ef e8 12 fe cc fd e9 e8 fa ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <41> 57 41 56 49 89 d6 41 55 49 89 f5 41 54 55 48 89 fd 53 48 bb 00
RSP: 0018:ffffc900021ef9b8 EFLAGS: 00000246
RAX: 1ffff9200043df74 RBX: dffffc0000000000 RCX: ffff0a00ffffff04
RDX: ffff8880a3e15968 RSI: ffffc900021efb40 RDI: ffffc900021efb0b
RBP: 0000000000000028 R08: 000000000000002f R09: ffffffff83eea88f
R10: ffffffff83eeadd2 R11: 0000000000000004 R12: ffffc900021efb0b
R13: ffffffff899a318d R14: ffffc900021efba0 R15: ffffc900021efac0
 vsnprintf+0x71d/0x14f0 lib/vsprintf.c:2790
 dynamic_dname+0xc6/0x170 fs/d_path.c:305
 tomoyo_realpath_from_path+0x155/0x620 security/tomoyo/realpath.c:261
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x1d5/0x590 security/tomoyo/file.c:723
 security_file_ioctl+0x50/0xb0 security/security.c:1539
 __do_sys_ioctl fs/ioctl.c:1063 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0xb3/0x200 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f16f81c8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000e43 RSI: 0000000000002402 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe1f0b14cf R14: 00007f16f81c8300 R15: 0000000000022000

================================
WARNING: inconsistent lock state
5.13.0-syzkaller #0 Not tainted
--------------------------------
inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
syz-executor.3/13757 [HC0[0]:SC1[1]:HE0:SE0] takes:
ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: print_other_cpu_stall kernel/rcu/tree_stall.h:542 [inline]
ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: check_cpu_stall kernel/rcu/tree_stall.h:708 [inline]
ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: rcu_pending kernel/rcu/tree.c:3911 [inline]
ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: rcu_sched_clock_irq+0xc9a/0x20c0 kernel/rcu/tree.c:2649
{IN-HARDIRQ-W} state was registered at:
  lock_acquire kernel/locking/lockdep.c:5625 [inline]
  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
  __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
  _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
  rcu_report_exp_cpu_mult+0x1c/0x280 kernel/rcu/tree_exp.h:237
  flush_smp_call_function_queue+0x34b/0x640 kernel/smp.c:663
  __sysvec_call_function_single+0x95/0x3d0 arch/x86/kernel/smp.c:248
  sysvec_call_function_single+0x8e/0xc0 arch/x86/kernel/smp.c:243
  asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:646
  arch_atomic64_add_return arch/x86/include/asm/atomic64_64.h:160 [inline]
  arch_atomic64_inc_return include/linux/atomic-arch-fallback.h:1463 [inline]
  atomic64_inc_return include/asm-generic/atomic-instrumented.h:767 [inline]
  init_new_context arch/x86/include/asm/mmu_context.h:107 [inline]
  mm_init+0x66a/0xaa0 kernel/fork.c:1065
  mm_alloc+0xa2/0xc0 kernel/fork.c:1090
  bprm_mm_init fs/exec.c:369 [inline]
  alloc_bprm+0x1c6/0x8f0 fs/exec.c:1524
  kernel_execve+0x55/0x460 fs/exec.c:1944
  call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
irq event stamp: 9873043
hardirqs last  enabled at (9873042): [<ffffffff89400c02>] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
hardirqs last disabled at (9873043): [<ffffffff891fc4eb>] sysvec_apic_timer_interrupt+0xb/0xc0 arch/x86/kernel/apic/apic.c:1100
softirqs last  enabled at (8531000): [<ffffffff8146347e>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last  enabled at (8531000): [<ffffffff8146347e>] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
softirqs last disabled at (8531003): [<ffffffff8146347e>] invoke_softirq kernel/softirq.c:432 [inline]
softirqs last disabled at (8531003): [<ffffffff8146347e>] __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(rcu_node_0);
  <Interrupt>
    lock(rcu_node_0);

 *** DEADLOCK ***

3 locks held by syz-executor.3/13757:
 #0: ffffffff8b97bac0 (rcu_read_lock){....}-{1:2}, at: ieee80211_iterate_active_interfaces_atomic+0x0/0x170 net/mac80211/util.c:1237
 #1: ffffffff8c771198 (hwsim_radio_lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline]
 #1: ffffffff8c771198 (hwsim_radio_lock){+.-.}-{2:2}, at: mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1516
 #2: ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: print_other_cpu_stall kernel/rcu/tree_stall.h:542 [inline]
 #2: ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: check_cpu_stall kernel/rcu/tree_stall.h:708 [inline]
 #2: ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: rcu_pending kernel/rcu/tree.c:3911 [inline]
 #2: ffffffff8b9846d8 (rcu_node_0){?.-.}-{2:2}, at: rcu_sched_clock_irq+0xc9a/0x20c0 kernel/rcu/tree.c:2649

stack backtrace:
CPU: 0 PID: 13757 Comm: syz-executor.3 Not tainted 5.13.0-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_lvl+0xcd/0x134 lib/dump_stack.c:96
 print_usage_bug kernel/locking/lockdep.c:203 [inline]
 valid_state kernel/locking/lockdep.c:3933 [inline]
 mark_lock_irq kernel/locking/lockdep.c:4136 [inline]
 mark_lock.cold+0x61/0x8e kernel/locking/lockdep.c:4593
 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4194
 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4212 [inline]
 lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4280 [inline]
 lockdep_hardirqs_on_prepare+0x135/0x400 kernel/locking/lockdep.c:4232
 trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x78f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1527
Code: bb ac 3c 00 00 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 36 09 00 00 44 0f b6 bb ac 3c 00 00 <31> ff 44 89 fe e8 97 a1 48 fc 45 84 ff 0f 84 77 ff ff ff e8 49 9b
RSP: 0018:ffffc90000007ba0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88806ae23260 RCX: 0000000000000100
RDX: 0000000000000004 RSI: ffffffff852ce683 RDI: ffff88806ae26f0c
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000000
R10: ffffffff852ce6b9 R11: 0000000000000000 R12: ffff888089486140
R13: ffff888021433490 R14: ffff888021433260 R15: 0000000000000000
 mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784
 mac80211_hwsim_beacon_tx+0x4b7/0x920 drivers/net/wireless/mac80211_hwsim.c:1838
 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793
 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829
 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618
 __do_softirq+0x29b/0x9bd kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x16e/0x1c0 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 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:638
RIP: 0010:finish_task_switch.isra.0+0x23c/0xa50 kernel/sched/core.c:4557
Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 b3 ad d2 07 e8 0e c4 2b 00 fb 65 48 8b 1c 25 00 f0 01 00 <48> 8d bb 10 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90001adf6c0 EFLAGS: 00000206
RAX: 00000000001ebc59 RBX: ffff888095811c40 RCX: 1ffffffff1ad5639
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90001adf700 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817b9798 R11: 0000000000000000 R12: ffff8880b9c51a40
R13: ffff88801dc9d4c0 R14: ffff8880131ab800 R15: ffff8880b9c51a58
 context_switch kernel/sched/core.c:4686 [inline]
 __schedule+0x93c/0x2710 kernel/sched/core.c:5940
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6328
 irqentry_exit+0x31/0x80 kernel/entry/common.c:427
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 83 f8
RSP: 0018:ffffc90001adf8b8 EFLAGS: 00010206
RAX: 0000000000000001 RBX: 0000000000033fe0 RCX: 0000000000029a80
RDX: 0000000000033fe0 RSI: 000000002000a5a0 RDI: ffffc9000226b560
RBP: ffffc90002261000 R08: 0000000000000001 R09: ffffc90002294fdf
R10: fffff520004529fb R11: 0000000000000000 R12: 0000000020000040
R13: 0000000020034020 R14: 0000000000000000 R15: ffffc90001adfe80
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
 copyin.part.0+0xe4/0x110 lib/iov_iter.c:201
 copyin lib/iov_iter.c:834 [inline]
 _copy_from_iter_full+0x299/0x11c0 lib/iov_iter.c:834
 copy_from_iter_full include/linux/uio.h:163 [inline]
 memcpy_from_msg include/linux/skbuff.h:3674 [inline]
 netlink_sendmsg+0x7c7/0xda0 net/netlink/af_netlink.c:1914
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:723
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2392
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2446
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2475
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f1ade81f188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038
R13: 00007fff07998e9f R14: 00007f1ade81f300 R15: 0000000000022000