Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci2 command 0x0419 tx timeout BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 262s! INFO: task kworker/u4:1:29299 blocked for more than 140 seconds. Showing busy workqueues and worker pools: workqueue events: flags=0x0 Not tainted 4.14.293-syzkaller #0 pwq 0: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:1 D26992 29299 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 cpus=0 node=0 flags=0x0 nice=0 active=14/256 refcnt=15 in-flight: 14598:rtc_timer_do_work pending: defense_work_handler, defense_work_handler, vmstat_shepherd, cache_reap, defense_work_handler, nfc_urelease_event_work, rtc_timer_do_work, smc_close_sock_put_work, free_obj_work , macvlan_process_broadcast , vhci_open_timeout schedule+0x8d/0x1b0 kernel/sched/core.c:3431 , macvlan_process_broadcast, proc_cleanup_work workqueue events_long: flags=0x0 schedule_timeout+0x80a/0xe90 kernel/time/timer.c:1724 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 refcnt=5 pending: gc_worker, br_fdb_cleanup, br_fdb_cleanup, br_fdb_cleanup workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=4/512 refcnt=7 in-flight: 29299:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn, 26741:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 in-flight: 17493:sync_cmos_clock pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 refcnt=4 pending: process_srcu, do_cache_clean, neigh_periodic_work 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 workqueue netns: flags=0xe000a pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=4 in-flight: 16509:cleanup_net workqueue ipv6_addrconf: flags=0x40008 pwq 0: cpus=0 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=13 in-flight: 27031:batadv_nc_worker delayed: batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_nc_worker, batadv_purge_orig, batadv_iv_send_outstanding_bat_ogm_packet, batadv_iv_send_outstanding_bat_ogm_packet, batadv_iv_send_outstanding_bat_ogm_packet pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=262s workers=3 idle: 573 __synchronize_srcu+0x10a/0x1d0 kernel/rcu/srcutree.c:898 14587 pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=4 idle: 27077 23400 14814 pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 27031 5 26996 13543 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 kworker/u4:3:26741 blocked for more than 140 seconds. Not tainted 4.14.293-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:3 D26992 26741 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: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_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/u4:2:16509 blocked for more than 140 seconds. Not tainted 4.14.293-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:2 D28888 16509 2 0x80000000 Workqueue: netns cleanup_net 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 flush_workqueue+0x3ce/0x1310 kernel/workqueue.c:2677 flush_scheduled_work include/linux/workqueue.h:578 [inline] tipc_exit_net+0x38/0x60 net/tipc/core.c:96 ops_exit_list+0xad/0x160 net/core/net_namespace.c:142 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:487 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 Showing all locks held in the system: 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 3 locks held by kworker/1:1/17493: #0: ("events_power_efficient"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((sync_cmos_work).work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (&rtc->ops_lock){+.+.}, at: [] rtc_set_time drivers/rtc/interface.c:68 [inline] #2: (&rtc->ops_lock){+.+.}, at: [] rtc_set_time+0x55/0x380 drivers/rtc/interface.c:60 2 locks held by kworker/u4:1/29299: #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/u4:3/26741: #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 3 locks held by kworker/u4:2/16509: #0: ("%s""netns"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: (net_cleanup_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (net_mutex){+.+.}, at: [] cleanup_net+0x110/0x840 net/core/net_namespace.c:453 1 lock held by syz-executor.4/26934: #0: (&rtc->ops_lock){+.+.}, at: [] rtc_dev_ioctl+0xce/0x760 drivers/rtc/rtc-dev.c:219 1 lock held by syz-executor.4/27067: #0: (net_mutex){+.+.}, at: [] copy_net_ns+0x156/0x440 net/core/net_namespace.c:413 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.293-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14598 Comm: kworker/0:2 Not tainted 4.14.293-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Workqueue: events rtc_timer_do_work task: ffff88807fa9c4c0 task.stack: ffff88808f298000 RIP: 0010:rtc_handle_legacy_irq+0x35/0x180 drivers/rtc/interface.c:514 RSP: 0018:ffff88808f29fba8 EFLAGS: 00000096 RAX: 0000000000000286 RBX: ffff888237965740 RCX: 00000000000078fd RDX: ffff888237965cc0 RSI: 0000000000000286 RDI: ffff888237965cc0 RBP: 0000000000000001 R08: ffffffff8b9de2e8 R09: 00000000000c0686 R10: ffff88807fa9cdc0 R11: ffff88807fa9c4c0 R12: 0000000000000010 R13: ffff888237965cc8 R14: ffff888237965e20 R15: ffffffff84b0db70 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd2caa57000 CR3: 00000000a1bc9000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rtc_timer_do_work+0x1f7/0x5a0 drivers/rtc/interface.c:881 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 Code: 89 f5 53 48 89 fb 4c 8d ab 88 05 00 00 48 83 ec 08 e8 d0 6d a4 fc 4c 89 ef e8 68 84 73 02 48 8d bb 80 05 00 00 48 89 fa 48 89 c6 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 f6 ---------------- Code disassembly (best guess): 0: 89 f5 mov %esi,%ebp 2: 53 push %rbx 3: 48 89 fb mov %rdi,%rbx 6: 4c 8d ab 88 05 00 00 lea 0x588(%rbx),%r13 d: 48 83 ec 08 sub $0x8,%rsp 11: e8 d0 6d a4 fc callq 0xfca46de6 16: 4c 89 ef mov %r13,%rdi 19: e8 68 84 73 02 callq 0x2738486 1e: 48 8d bb 80 05 00 00 lea 0x580(%rbx),%rdi 25: 48 89 fa mov %rdi,%rdx 28: 48 89 c6 mov %rax,%rsi * 2b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 32: fc ff df 35: 48 c1 ea 03 shr $0x3,%rdx 39: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 3d: 0f .byte 0xf 3e: 85 f6 test %esi,%esi