Bluetooth: hci11 command 0x041b tx timeout Bluetooth: hci10 command 0x040f tx timeout Bluetooth: hci11 command 0x040f tx timeout Bluetooth: hci10 command 0x0419 tx timeout Bluetooth: hci11 command 0x0419 tx timeout BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 252s! INFO: task kworker/u4:2:35 blocked for more than 140 seconds. Showing busy workqueues and worker pools: Not tainted 4.14.295-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:2 D workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=17/256 refcnt=18 in-flight: 8995:rtc_timer_do_work 28776 35 2 0x80000000 pending: cache_reap Workqueue: events_unbound fsnotify_connector_destroy_workfn , macvlan_process_broadcast, macvlan_process_broadcast, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, macvlan_process_broadcast, wait_rcu_exp_gp, free_obj_work, switchdev_deferred_process_work Call Trace: workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=4/512 refcnt=7 in-flight: 3505:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn, 35:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn workqueue events_freezable: flags=0x4 context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 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 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 pending: process_srcu, process_srcu workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 pending: vmstat_update pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=253s workers=5 idle: 4622 19 9200 24 pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=8 idle: 8723 9264 171 23 9469 5 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:404 INFO: task kworker/u4:4:3505 blocked for more than 140 seconds. Not tainted 4.14.295-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:4 D27584 3505 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:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 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:404 INFO: task syz-executor.1:7997 blocked for more than 140 seconds. Not tainted 4.14.295-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D25840 7997 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 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 debugfs_remove fs/debugfs/inode.c:669 [inline] debugfs_remove+0xc7/0x110 fs/debugfs/inode.c:654 bdi_debug_unregister mm/backing-dev.c:126 [inline] bdi_unregister+0x3da/0x610 mm/backing-dev.c:953 release_bdi mm/backing-dev.c:970 [inline] kref_put include/linux/kref.h:70 [inline] bdi_put+0x127/0x160 mm/backing-dev.c:979 generic_shutdown_super+0x2aa/0x370 fs/super.c:460 kill_anon_super+0x36/0x90 fs/super.c:1006 deactivate_locked_super+0x6c/0xd0 fs/super.c:319 deactivate_super+0x7f/0xa0 fs/super.c:350 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f579df78a17 RSP: 002b:00007ffd524d9c38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f579df78a17 RDX: 00007ffd524d9d09 RSI: 000000000000000a RDI: 00007ffd524d9d00 RBP: 00007ffd524d9d00 R08: 00000000ffffffff R09: 00007ffd524d9ad0 R10: 0000555556a21903 R11: 0000000000000246 R12: 00007f579dfd15f6 R13: 00007ffd524dadc0 R14: 0000555556a21810 R15: 00007ffd524dae00 INFO: task syz-executor.2:9855 blocked for more than 140 seconds. Not tainted 4.14.295-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28912 9855 7998 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 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 debugfs_remove_recursive fs/debugfs/inode.c:744 [inline] debugfs_remove_recursive+0x2e0/0x3b0 fs/debugfs/inode.c:686 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:585 [inline] kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:776 [inline] kvm_put_kvm+0xec/0xab0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:819 kvm_device_release+0x52/0x70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2948 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f46bf97a37b RSP: 002b:00007ffc0c3f0210 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000006 RCX: 00007f46bf97a37b RDX: 00007f46bfaee280 RSI: ffffffffffffffff RDI: 0000000000000005 RBP: 00007f46bfaeb980 R08: 0000000000000000 R09: 00007f46bfaee288 R10: 00007ffc0c3f0310 R11: 0000000000000293 R12: 000000000002b79b R13: 00007ffc0c3f0310 R14: 00007f46bfae9f80 R15: 0000000000000032 INFO: task syz-executor.0:9874 blocked for more than 140 seconds. Not tainted 4.14.295-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28912 9874 7993 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 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 debugfs_remove_recursive fs/debugfs/inode.c:744 [inline] debugfs_remove_recursive+0x2e0/0x3b0 fs/debugfs/inode.c:686 kvm_destroy_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:585 [inline] kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:776 [inline] kvm_put_kvm+0xec/0xab0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:819 kvm_vm_release+0x3f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:830 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f135119337b RSP: 002b:00007ffd7b2d6010 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f135119337b RDX: 00007f1351307198 RSI: ffffffffffffffff RDI: 0000000000000004 RBP: 00007f1351304980 R08: 0000000000000000 R09: 00007f13513071a0 R10: 00007ffd7b2d6110 R11: 0000000000000293 R12: 000000000002b815 R13: 00007ffd7b2d6110 R14: 00007f1351302f80 R15: 0000000000000032 INFO: task syz-executor.2:9924 blocked for more than 140 seconds. Not tainted 4.14.295-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27528 9924 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2811 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3387 schedule+0x8d/0x1b0 kernel/sched/core.c:3431 _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 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+0x46/0xbb RIP: 0033:0x7f5cff0ceb67 RSP: 002b:00007fff62039aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fff6203a0e8 RCX: 00007f5cff0ceb67 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000006 R13: 00007fff62039b80 R14: 00007f5cff1ef4f8 R15: 0000000000000006 Showing all locks held in the system: 2 locks held by kworker/u4:2/35: #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/1534: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 2 locks held by kworker/u4:4/3505: #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 agetty/7916: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e3/0x1680 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.2/9924: #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:272 [inline] #1: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x2c2/0x770 kernel/rcu/tree_exp.h:596 1 lock held by syz-executor.0/9926: #0: (rcu_preempt_state.exp_mutex){+.+.}, at: [] exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline] #0: (rcu_preempt_state.exp_mutex){+.+.}, at: [] _synchronize_rcu_expedited+0x32d/0x770 kernel/rcu/tree_exp.h:596 1 lock held by syz-executor.0/9970: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:413 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1534 Comm: khungtaskd Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 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:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4613 Comm: systemd-journal Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 task: ffff8880a1fae580 task.stack: ffff8880a1fb0000 RIP: 0010:___bpf_prog_run+0x2d88/0x5630 kernel/bpf/core.c:1045 RSP: 0018:ffff8880a1fb7a48 EFLAGS: 00000202 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 1ffff110143f6f72 RDX: 0000000000000001 RSI: ffffc90001a80030 RDI: ffffc90001a80041 RBP: ffff8880a1fb7b58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff878f1020 R13: 1ffff110143f6f50 R14: ffffc90001a80040 R15: ffff8880a1fb7b88 FS: 00007f021b9468c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0218d71010 CR3: 00000000a1e25000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Code: 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 18 38 d0 7f 08 84 c0 0f 85 eb 22 00 00 41 0f b6 46 01 89 c2 83 e0 0f 4c 8d 7c c5 00 c0 ea 04 <0f> b6 d2 48 8d 54 d5 00 48 89 d0 48 c1 e8 03 80 3c 18 00 0f 85 ---------------- Code disassembly (best guess): 0: 89 fa mov %edi,%edx 2: 48 c1 e8 03 shr $0x3,%rax 6: 83 e2 07 and $0x7,%edx 9: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax d: 38 d0 cmp %dl,%al f: 7f 08 jg 0x19 11: 84 c0 test %al,%al 13: 0f 85 eb 22 00 00 jne 0x2304 19: 41 0f b6 46 01 movzbl 0x1(%r14),%eax 1e: 89 c2 mov %eax,%edx 20: 83 e0 0f and $0xf,%eax 23: 4c 8d 7c c5 00 lea 0x0(%rbp,%rax,8),%r15 28: c0 ea 04 shr $0x4,%dl * 2b: 0f b6 d2 movzbl %dl,%edx <-- trapping instruction 2e: 48 8d 54 d5 00 lea 0x0(%rbp,%rdx,8),%rdx 33: 48 89 d0 mov %rdx,%rax 36: 48 c1 e8 03 shr $0x3,%rax 3a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 3e: 0f .byte 0xf 3f: 85 .byte 0x85