Bluetooth: hci2: command 0x0406 tx timeout rcu: INFO: rcu_sched self-detected stall on CPU rcu: 0-....: (10501 ticks this GP) idle=e0e/1/0x4000000000000004 softirq=104558/105086 fqs=5174 rcu: (t=10502 jiffies g=20893 q=24) NMI backtrace for cpu 0 CPU: 0 PID: 7030 Comm: syz-executor.3 Not tainted 4.19.158-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/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb 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:deref_stack_regs arch/x86/kernel/unwind_orc.c:349 [inline] RIP: 0010:unwind_next_frame+0xd55/0x1c60 arch/x86/kernel/unwind_orc.c:515 Code: 00 4c 89 ff 48 89 4c 24 20 48 89 74 24 18 e8 f2 ed ff ff 84 c0 0f 84 85 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 74 24 18 <48> 8b 4c 24 20 48 8d be 80 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 RSP: 0018:ffff8880ba007790 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017400efa RCX: 1ffff11017400f11 RDX: ffff8880351e0001 RSI: ffff8880351dff58 RDI: ffff8880ba007888 RBP: 0000000000000001 R08: ffffffff8c1126d8 R09: ffffffff8c1126d9 R10: 0000000000074071 R11: 0000000000000001 R12: ffff8880ba0078c0 R13: ffff8880ba0078ad R14: ffff8880ba0078b0 R15: ffff8880ba007878 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 __build_skb+0x39/0x300 net/core/skbuff.c:281 __netdev_alloc_skb+0x2a7/0x460 net/core/skbuff.c:426 netdev_alloc_skb include/linux/skbuff.h:2675 [inline] dev_alloc_skb include/linux/skbuff.h:2688 [inline] __ieee80211_beacon_get+0xc7d/0x1a30 net/mac80211/tx.c:4332 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:544 [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:write_comp_data+0x23/0x70 kernel/kcov.c:122 Code: 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 80 df 01 00 65 8b 05 aa 0e 9d 7e a9 00 01 1f 00 75 4f 8b 86 d8 12 00 00 <83> f8 03 75 44 48 8b 86 e0 12 00 00 8b b6 dc 12 00 00 48 8b 38 48 RSP: 0018:ffff8880351df6f0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffea0000f00080 RCX: ffffffff81923921 RDX: 0000000000000000 RSI: ffff88803872e540 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: dead000000000100 R13: ffffffffffffffff R14: ffffea0000f00080 R15: 00007f9ebbb6c000 compound_head include/linux/page-flags.h:144 [inline] PageMlocked include/linux/page-flags.h:354 [inline] page_remove_file_rmap+0x421/0xa30 mm/rmap.c:1246 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: 0033:0x45deb9 Code: Bad RIP value. RSP: 002b:00007f9eb9b80c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: 0000000000000070 RBX: 0000000000027f80 RCX: 000000000045deb9 RDX: 0400000000000070 RSI: 0000000020007fc0 RDI: 0000000000000003 RBP: 000000000118bf68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000060 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffc3baa76ef R14: 00007f9eb9b819c0 R15: 000000000118bf2c Bluetooth: hci3: command 0x0406 tx timeout