mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium rcu: INFO: rcu_sched self-detected stall on CPU rcu: 1-....: (10489 ticks this GP) idle=56e/1/0x4000000000000004 softirq=156973/157558 fqs=5120 rcu: (t=10500 jiffies g=9141 q=9) NMI backtrace for cpu 1 CPU: 1 PID: 27417 Comm: syz-executor.0 Not tainted 4.19.168-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1650 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__ieee80211_beacon_get+0x8b4/0x1a30 net/mac80211/tx.c:4410 Code: 3c 02 00 0f 85 f0 0e 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 6d 38 4a 8d bc f5 f8 00 00 00 48 89 f9 48 c1 e9 03 80 3c 11 00 <0f> 85 bf 0e 00 00 4a 8b 84 f5 f8 00 00 00 4c 89 64 24 70 c6 44 24 RSP: 0018:ffff8880ba107c08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff88804c22a110 RCX: 1ffff1100984f3a3 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff88804c279d18 RBP: ffff88804c279c20 R08: 0000000000000001 R09: ffff8880ba107c60 R10: ffff8880ba107c9f R11: 0000000000000000 R12: ffff8880460d08c0 R13: ffff8880460d08e8 R14: 0000000000000000 R15: ffff8880ba107c60 ieee80211_beacon_get_tim+0x88/0x890 net/mac80211/tx.c:4443 ieee80211_beacon_get include/net/mac80211.h:4484 [inline] mac80211_hwsim_beacon_tx+0xff/0x680 drivers/net/wireless/mac80211_hwsim.c:1577 __iterate_interfaces+0x2e1/0x4a0 net/mac80211/util.c:614 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:650 mac80211_hwsim_beacon+0xc9/0x190 drivers/net/wireless/mac80211_hwsim.c:1615 __tasklet_hrtimer_trampoline+0x29/0xa0 kernel/softirq.c:601 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:545 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:check_preemption_disabled+0x1d/0x280 lib/smp_processor_id.c:15 Code: ff 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 e8 9b d1 ec fd 65 44 8b 25 73 f8 8b 7c <65> 8b 1d 4c 56 8c 7c 81 e3 ff ff ff 7f 31 ff 89 de e8 ed d2 ec fd RSP: 0018:ffff8880198ff660 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8880afda8500 RBX: ffffea0000981300 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff837588b5 RDI: ffffffff88b3be00 RBP: ffffffff88b3be00 R08: 000000004116cc1d R09: 0000000000000001 R10: ffff8880afda8db0 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff88b3bdc0 R14: ffffea0000981300 R15: 00007ffaf8794000 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock include/linux/rcupdate.h:628 [inline] lock_page_memcg+0x132/0x220 mm/memcontrol.c:1908 page_remove_file_rmap+0x36/0xa30 mm/rmap.c:1215 page_remove_rmap+0xe5/0x120 mm/rmap.c:1300 zap_pte_range mm/memory.c:1350 [inline] zap_pmd_range mm/memory.c:1452 [inline] zap_pud_range mm/memory.c:1481 [inline] zap_p4d_range mm/memory.c:1502 [inline] unmap_page_range+0x12f6/0x2a70 mm/memory.c:1523 unmap_single_vma+0x198/0x300 mm/memory.c:1568 unmap_vmas+0xa9/0x180 mm/memory.c:1598 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1015 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1036 exit_mm kernel/exit.c:549 [inline] do_exit+0xaf0/0x2be0 kernel/exit.c:877 do_group_exit+0x125/0x310 kernel/exit.c:993 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e219 Code: Bad RIP value. RSP: 002b:00007ffaf7ad7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: 0000000000000070 RBX: 0000000000000004 RCX: 000000000045e219 RDX: 0400000000000070 RSI: 0000000020007fc0 RDI: 0000000000000003 RBP: 000000000119bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fffa9c4e45f R14: 00007ffaf7ad89c0 R15: 000000000119bf8c Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout