Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:4313] Modules linked in: irq event stamp: 38312697 hardirqs last enabled at (38312696): [] asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:661 hardirqs last disabled at (38312697): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (38162134): [] spin_unlock_bh include/linux/spinlock.h:399 [inline] softirqs last enabled at (38162134): [] rt6_uncached_list_flush_dev net/ipv6/route.c:188 [inline] softirqs last enabled at (38162134): [] rt6_disable_ip+0x3b7/0x5d0 net/ipv6/route.c:4810 softirqs last disabled at (38162136): [] __neigh_ifdown.isra.0+0x40/0x380 net/core/neighbour.c:391 CPU: 1 PID: 4313 Comm: syz-executor.0 Not tainted 5.10.237 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:lock_acquire+0x1b9/0x470 kernel/locking/lockdep.c:5534 Code: 35 db 7e e8 39 91 ff ff b8 ff ff ff ff 48 83 c4 20 65 0f c1 05 28 35 db 7e 83 f8 01 4c 8b 54 24 08 0f 85 48 02 00 00 41 52 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffff888046236ce0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff11008c46d9e RCX: 00000000f5bb7cf1 RDX: 1ffff1100918e470 RSI: 9a357e580ad7ccd9 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8686c6a7 R10: 0000000000000246 R11: 0000000000000001 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff84ff9220 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005648b11e8080 CR3: 000000000d098000 CR4: 0000000000350ee0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:303 [inline] rcu_read_lock include/linux/rcupdate.h:717 [inline] __is_insn_slot_addr+0x3f/0x290 kernel/kprobes.c:299 is_kprobe_optinsn_slot include/linux/kprobes.h:336 [inline] kernel_text_address kernel/extable.c:149 [inline] kernel_text_address+0xdf/0x120 kernel/extable.c:120 __kernel_text_address+0x9/0x40 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:323 [inline] unwind_get_return_address+0x55/0xa0 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0x99/0xf0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] __kmalloc_node_track_caller+0x1a6/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:144 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:212 alloc_skb include/linux/skbuff.h:1099 [inline] nlmsg_new include/net/netlink.h:953 [inline] __neigh_notify+0xef/0x3a0 net/core/neighbour.c:3379 neigh_cleanup_and_release+0x78/0x220 net/core/neighbour.c:102 neigh_flush_dev+0x4ad/0x8b0 net/core/neighbour.c:375 __neigh_ifdown.isra.0+0x54/0x380 net/core/neighbour.c:392 neigh_ifdown+0x1b/0x30 net/core/neighbour.c:409 rt6_disable_ip+0x48c/0x5d0 net/ipv6/route.c:4811 addrconf_ifdown.isra.0+0x11f/0x15f0 net/ipv6/addrconf.c:3755 addrconf_notify+0x161/0x2390 net/ipv6/addrconf.c:3678 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xb3/0x110 kernel/notifier.c:410 call_netdevice_notifiers_info+0xba/0x130 net/core/dev.c:2047 call_netdevice_notifiers_extack net/core/dev.c:2059 [inline] call_netdevice_notifiers net/core/dev.c:2073 [inline] dev_close_many+0x25b/0x460 net/core/dev.c:1648 unregister_netdevice_many+0x349/0x1490 net/core/dev.c:10729 unregister_netdevice_queue+0x201/0x2c0 net/core/dev.c:10686 unregister_netdevice include/linux/netdevice.h:2897 [inline] __tun_detach+0xfc1/0x12b0 drivers/net/tun.c:697 tun_detach drivers/net/tun.c:713 [inline] tun_chr_close+0xc4/0x250 drivers/net/tun.c:3486 __fput+0x285/0x9f0 fs/file_table.c:281 task_work_run+0xe2/0x1a0 kernel/task_work.c:185 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xb6f/0x2600 kernel/exit.c:860 do_group_exit+0x125/0x310 kernel/exit.c:982 get_signal+0x4bc/0x2350 kernel/signal.c:2762 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1d0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7fb538555b19 Code: Unable to access opcode bytes at RIP 0x7fb538555aef. RSP: 002b:00007fb535acb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007fb538668f60 RCX: 00007fb538555b19 RDX: 0000000020000140 RSI: 0000000000005452 RDI: 0000000000000005 RBP: 00007fb5385aff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff22bf27ef R14: 00007fb535acb300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:711 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: e8 39 91 ff ff callq 0xffff913e 5: b8 ff ff ff ff mov $0xffffffff,%eax a: 48 83 c4 20 add $0x20,%rsp e: 65 0f c1 05 28 35 db xadd %eax,%gs:0x7edb3528(%rip) # 0x7edb353e 15: 7e 16: 83 f8 01 cmp $0x1,%eax 19: 4c 8b 54 24 08 mov 0x8(%rsp),%r10 1e: 0f 85 48 02 00 00 jne 0x26c 24: 41 52 push %r10 26: 9d popfq * 27: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 2e: fc ff df 31: 48 01 c3 add %rax,%rbx 34: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 3b: 48 rex.W 3c: c7 .byte 0xc7