Bluetooth: hci8 command 0x040f tx timeout Bluetooth: hci8 command 0x0419 tx timeout Bluetooth: hci7 command 0x0406 tx timeout Bluetooth: hci9 command 0x0409 tx timeout Bluetooth: hci9 command 0x041b tx timeout BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 266s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=21/256 refcnt=22 in-flight: 4623:rtc_timer_do_work pending: nfc_urelease_event_work, macvlan_process_broadcast, defense_work_handler, macvlan_process_broadcast, defense_work_handler, cache_reap, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, rtc_timer_do_work, release_one_tty, wait_rcu_exp_gp, nfc_urelease_event_work, macvlan_process_broadcast, hci_cmd_timeout, nfc_urelease_event_work, nfc_urelease_event_work, key_garbage_collector, free_ioctx, free_ioctx workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=4/512 refcnt=7 in-flight: 5:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn, 1488:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn workqueue events_freezable: flags=0x4 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: update_balloon_stats_func workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 pending: process_srcu, fb_flashcursor workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: vmstat_update workqueue usb_hub_wq: flags=0x4 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: hub_event workqueue dm_bufio_cache: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: work_fn workqueue ipv6_addrconf: flags=0x40008 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2 pending: addrconf_verify_work workqueue bat_events: flags=0xe000a pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=12 pending: batadv_iv_send_outstanding_bat_ogm_packet delayed: batadv_iv_send_outstanding_bat_ogm_packet, batadv_iv_send_outstanding_bat_ogm_packet, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=266s workers=5 idle: 8027 18 9128 23 pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 9416 9259 34 22 150 INFO: task kworker/u4:0:5 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 Bluetooth: hci9 command 0x040f tx timeout "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:0 D26088 5 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 fsnotify_mark_destroy_workfn+0xed/0x2e0 fs/notify/mark.c:757 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 INFO: task kworker/u4:4:1488 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:4 D28336 1488 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common+0x272/0x430 kernel/sched/completion.c:123 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:156 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 INFO: task syz-executor.5:10351 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D30232 10351 8005 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 _synchronize_rcu_expedited+0x522/0x770 kernel/rcu/tree_exp.h:615 synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762 synchronize_net+0x3a/0x40 net/core/dev.c:8250 packet_release+0x740/0xa80 net/packet/af_packet.c:3116 __sock_release+0x1fc/0x2b0 net/socket.c:602 sock_release net/socket.c:623 [inline] SYSC_socketpair net/socket.c:1460 [inline] SyS_socketpair+0x360/0x480 net/socket.c:1366 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fd369c0f0f9 RSP: 002b:00007fd368181168 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007fd369d2ef80 RCX: 00007fd369c0f0f9 RDX: 0000000000007d81 RSI: 0000000000000003 RDI: 0000000000000011 RBP: 00007fd369c6aae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd53e246af R14: 00007fd368181300 R15: 0000000000022000 INFO: task syz-executor.5:10427 blocked for more than 140 seconds. Not tainted 4.14.305-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27528 10427 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3386 schedule+0x8d/0x1b0 kernel/sched/core.c:3430 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3488 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x669/0x1310 kernel/locking/mutex.c:893 exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline] _synchronize_rcu_expedited+0x32d/0x770 kernel/rcu/tree_exp.h:596 synchronize_rcu+0x98/0x130 kernel/rcu/tree_plugin.h:762 synchronize_net+0x3a/0x40 net/core/dev.c:8250 nf_register_net_hook+0x6a5/0xa40 net/netfilter/core.c:295 nf_register_net_hooks+0x47/0xa0 net/netfilter/core.c:383 ebt_register_table+0x912/0xbb0 net/bridge/netfilter/ebtables.c:1227 ops_init+0xaa/0x3e0 net/core/net_namespace.c:118 setup_net+0x22f/0x530 net/core/net_namespace.c:298 copy_net_ns+0x19b/0x440 net/core/net_namespace.c:422 create_new_namespaces+0x375/0x720 kernel/nsproxy.c:107 unshare_nsproxy_namespaces+0xa1/0x1d0 kernel/nsproxy.c:206 SYSC_unshare kernel/fork.c:2413 [inline] SyS_unshare+0x308/0x7f0 kernel/fork.c:2363 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f7fcf23b6b7 RSP: 002b:00007ffc4e71dbd8 EFLAGS: 00000202 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007ffc4e71e218 RCX: 00007f7fcf23b6b7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000006 R13: 00007ffc4e71dcb0 R14: 00007f7fcf35a4f8 R15: 0000000000000006 Showing all locks held in the system: 2 locks held by kworker/u4:0/5: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((reaper_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 2 locks held by kworker/u4:4/1488: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: (connector_reaper_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 1 lock held by khungtaskd/1524: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 1 lock held by syz-executor.5/10351: #0: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline] #0: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x2c2/0x770 kernel/rcu/tree_exp.h:596 2 locks held by syz-executor.5/10427: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:413 #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline] #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x32d/0x770 kernel/rcu/tree_exp.h:596 1 lock held by syz-executor.5/10463: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:413 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1524 Comm: khungtaskd Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4618 Comm: systemd-journal Not tainted 4.14.305-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 task: ffff8880a1b126c0 task.stack: ffff8880a1b18000 RIP: 0010:preempt_count_add+0x85/0x170 kernel/sched/core.c:3110 RSP: 0018:ffff8880a1b1fa20 EFLAGS: 00000246 RAX: 0000000080000001 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880a1b1f9e8 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880a1b1ff00 R11: 0000000000000001 R12: ffff8880a1b1fb80 R13: ffff8880a1b1fb30 R14: ffff88823f8c1200 R15: ffff8880a1b1faf8 FS: 00007f2c1bcf78c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2c1911b000 CR3: 00000000a1405000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xc2/0x17d0 arch/x86/kernel/unwind_orc.c:333 __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc+0x124/0x3c0 mm/slab.c:3552 getname_flags+0xc8/0x550 fs/namei.c:138 do_sys_open+0x1ce/0x410 fs/open.c:1075 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f2c1b286840 RSP: 002b:00007ffd91241f98 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffd912422a0 RCX: 00007f2c1b286840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000559c45170d80 RBP: 000000000000000d R08: 000000000000c0ff R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000559c45165040 R14: 00007ffd91242260 R15: 0000559c451721f0 Code: 83 c3 03 65 01 2d 9c 48 c9 7e 0f b6 04 02 38 c3 7c 08 84 c0 0f 85 c1 00 00 00 8b 15 76 e7 b3 0a 85 d2 75 11 65 8b 05 7b 48 c9 7e <0f> b6 c0 3d f4 00 00 00 7f 60 65 8b 05 6a 48 c9 7e 25 ff ff ff ---------------- Code disassembly (best guess): 0: 83 c3 03 add $0x3,%ebx 3: 65 01 2d 9c 48 c9 7e add %ebp,%gs:0x7ec9489c(%rip) # 0x7ec948a6 a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax e: 38 c3 cmp %al,%bl 10: 7c 08 jl 0x1a 12: 84 c0 test %al,%al 14: 0f 85 c1 00 00 00 jne 0xdb 1a: 8b 15 76 e7 b3 0a mov 0xab3e776(%rip),%edx # 0xab3e796 20: 85 d2 test %edx,%edx 22: 75 11 jne 0x35 24: 65 8b 05 7b 48 c9 7e mov %gs:0x7ec9487b(%rip),%eax # 0x7ec948a6 * 2b: 0f b6 c0 movzbl %al,%eax <-- trapping instruction 2e: 3d f4 00 00 00 cmp $0xf4,%eax 33: 7f 60 jg 0x95 35: 65 8b 05 6a 48 c9 7e mov %gs:0x7ec9486a(%rip),%eax # 0x7ec948a6 3c: 25 .byte 0x25 3d: ff (bad) 3e: ff (bad) 3f: ff .byte 0xff