rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10425 ticks this GP) idle=bfe/1/0x4000000000000000 softirq=41279/41280 fqs=5164 (t=10502 jiffies g=55225 q=289) NMI backtrace for cpu 0 CPU: 0 PID: 19375 Comm: syz-executor.5 Not tainted 5.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 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+0x1f4/0x230 kernel/rcu/tree_stall.h:337 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline] check_cpu_stall kernel/rcu/tree_stall.h:643 [inline] rcu_pending kernel/rcu/tree.c:3751 [inline] rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 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:1085 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102 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:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:ether_addr_equal include/linux/etherdevice.h:329 [inline] RIP: 0010:ieee80211_accept_frame net/mac80211/rx.c:3974 [inline] RIP: 0010:ieee80211_prepare_and_rx_handle+0x1c49/0x6210 net/mac80211/rx.c:4489 Code: fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 fd 04 5e f9 8b 85 c0 14 00 00 <48> 8d 4b 0a 48 89 ca 48 89 8c 24 80 00 00 00 48 c1 ea 03 89 44 24 RSP: 0018:ffffc90000007ae8 EFLAGS: 00000246 RAX: 0000000000110208 RBX: ffff8880a82db850 RCX: 0000000000000100 RDX: 0000000000000000 RSI: ffffffff88578531 RDI: ffff88802b17e080 RBP: ffff88802b17cbc0 R08: ffffffff8a634ae0 R09: ffffffff88576f1f R10: 0000000000000008 R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000001 R14: ffffc90000007d40 R15: 0000000000000001 __ieee80211_rx_handle_packet net/mac80211/rx.c:4566 [inline] ieee80211_rx_list+0x1077/0x2430 net/mac80211/rx.c:4746 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4769 ieee80211_rx include/net/mac80211.h:4508 [inline] ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x1d7/0x2d0 kernel/softirq.c:555 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __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:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:lock_release+0x3d5/0x710 kernel/locking/lockdep.c:5445 Code: 15 02 00 00 48 c7 c7 80 ab 4b 89 e8 95 e3 a0 07 b8 ff ff ff ff 65 0f c1 05 08 38 a9 7e 83 f8 01 0f 85 67 01 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c5 48 c7 45 00 00 00 00 00 c7 RSP: 0018:ffffc9000280f6d0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 73dc137520c94686 RCX: ffffc9000280f720 RDX: 1ffff11004c0b12f RSI: 0000000000000001 RDI: 0000000000000000 RBP: 1ffff92000501edc R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000002 R14: ffff888026058980 R15: ffff888026058000 zap_pte_range mm/memory.c:1264 [inline] zap_pmd_range mm/memory.c:1368 [inline] zap_pud_range mm/memory.c:1397 [inline] zap_p4d_range mm/memory.c:1418 [inline] unmap_page_range+0xe30/0x2640 mm/memory.c:1439 unmap_single_vma+0x198/0x300 mm/memory.c:1484 unmap_vmas+0x168/0x2e0 mm/memory.c:1516 exit_mmap+0x2b1/0x5a0 mm/mmap.c:3220 __mmput+0x122/0x470 kernel/fork.c:1083 mmput+0x53/0x60 kernel/fork.c:1104 exit_mm kernel/exit.c:501 [inline] do_exit+0xb6a/0x2ae0 kernel/exit.c:812 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x427/0x20f0 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:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: Unable to access opcode bytes at RIP 0x45e1ef. RSP: 002b:00007fb385cb2c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000003 RBX: 0000000000000004 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 00000000ffffff9c RBP: 000000000119c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffc666f67cf R14: 00007fb385cb39c0 R15: 000000000119c0dc