rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10396 ticks this GP) idle=c06/1/0x4000000000000000 softirq=35876/35879 fqs=5183 (t=10502 jiffies g=53341 q=420) NMI backtrace for cpu 0 CPU: 0 PID: 18218 Comm: syz-executor.0 Not tainted 5.10.0-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+0x1e3/0x21e 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+0x472/0xec3 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:1376 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1ce/0xea0 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:ieee80211_scan_rx+0x2/0x7c0 net/mac80211/scan.c:248 Code: 7f 6a f9 e9 3a fc ff ff e8 2b 7f 6a f9 e9 fe fb ff ff e8 01 7f 6a f9 e9 60 fc ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 <41> 56 41 55 41 54 55 48 89 fd 53 48 89 f3 48 83 ec 18 e8 37 fb 28 RSP: 0018:ffffc90000007ca8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff884fcd59 RDX: ffff888070401ac0 RSI: ffff888078ad9000 RDI: ffff88806eae0c80 RBP: ffff888078ad9000 R08: 0000000000000001 R09: ffffc90000007d48 R10: 0000000000000080 R11: 0000000000000001 R12: 0000000000000080 R13: ffff888078ad9000 R14: ffff88806eae0c80 R15: ffffc90000007d48 __ieee80211_rx_handle_packet net/mac80211/rx.c:4571 [inline] ieee80211_rx_list+0x1bd5/0x23d0 net/mac80211/rx.c:4759 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4780 ieee80211_rx include/net/mac80211.h:4502 [inline] ieee80211_tasklet_handler+0xd3/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x22f/0x2d0 kernel/softirq.c:560 __do_softirq+0x2a0/0x9f6 kernel/softirq.c:298 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:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x132/0x200 kernel/softirq.c:435 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:__tlb_remove_page_size+0xab/0x420 mm/mmu_gather.c:81 Code: 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e ed 02 00 00 48 b8 00 00 00 00 00 fc ff df 44 8b 65 08 4a 8d 7c e5 10 <45> 8d 6c 24 01 48 89 fa 48 c1 ea 03 44 89 6d 08 80 3c 02 00 0f 85 RSP: 0018:ffffc9000245f768 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc9000245fa68 RCX: ffffffff81a52292 RDX: 1ffff11005c4ec01 RSI: ffffffff81a522a0 RDI: ffff88802e276478 RBP: ffff88802e276000 R08: 0000000000000000 R09: ffffea0000909a33 R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000008d R13: ffff88801a02c898 R14: ffffea0000909a00 R15: ffffc9000245fa90 __tlb_remove_page include/asm-generic/tlb.h:438 [inline] zap_pte_range mm/memory.c:1256 [inline] zap_pmd_range mm/memory.c:1357 [inline] zap_pud_range mm/memory.c:1386 [inline] zap_p4d_range mm/memory.c:1407 [inline] unmap_page_range+0xea7/0x2640 mm/memory.c:1428 unmap_single_vma+0x198/0x300 mm/memory.c:1473 unmap_vmas+0x168/0x2e0 mm/memory.c:1505 exit_mmap+0x2b1/0x530 mm/mmap.c:3220 __mmput+0x122/0x470 kernel/fork.c:1081 mmput+0x53/0x60 kernel/fork.c:1102 exit_mm kernel/exit.c:500 [inline] do_exit+0xaa9/0x29f0 kernel/exit.c:810 do_group_exit+0x125/0x310 kernel/exit.c:920 get_signal+0x42a/0x1fb0 kernel/signal.c:2792 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+0x124/0x200 kernel/entry/common.c:201 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:315 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0033:0x406525 Code: Unable to access opcode bytes at RIP 0x4064fb. RSP: 002b:00007faa6663bc70 EFLAGS: 00000217 RAX: 0000000020ffc000 RBX: 0000000000000006 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffc000 RBP: 000000000119bfd8 R08: 0000000000000006 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fff3481009f R14: 00007faa6663c9c0 R15: 000000000119bf8c