INFO: task syz-executor.4:19485 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:25112 pid:19485 tgid:19485 ppid:19061 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1781/0x49d0 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2548 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 __flush_work+0xa7b/0xc90 kernel/workqueue.c:4205 __cancel_work_sync+0x330/0x6d0 kernel/workqueue.c:4304 uhid_dev_destroy drivers/hid/uhid.c:584 [inline] uhid_char_release+0xaf/0x600 drivers/hid/uhid.c:662 __fput+0x429/0x8a0 fs/file_table.c:422 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1541 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f32d207cc9a RSP: 002b:00007ffcc463aa80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f32d207cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b31720000 R09: 0000000000000003 R10: 0000000081360a66 R11: 0000000000000293 R12: 00007f32d1c00438 R13: ffffffffffffffff R14: 00007f32d1c00000 R15: 00000000000c1064 INFO: task syz-executor.0:19498 blocked for more than 148 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24632 pid:19498 tgid:19498 ppid:19352 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x1781/0x49d0 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6828 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2548 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 __flush_work+0xa7b/0xc90 kernel/workqueue.c:4205 __cancel_work_sync+0x330/0x6d0 kernel/workqueue.c:4304 uhid_dev_destroy drivers/hid/uhid.c:584 [inline] uhid_char_release+0xaf/0x600 drivers/hid/uhid.c:662 __fput+0x429/0x8a0 fs/file_table.c:422 __do_sys_close fs/open.c:1556 [inline] __se_sys_close fs/open.c:1541 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1541 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f4ac8a7cc9a RSP: 002b:00007ffec56167a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f4ac8a7cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b33a20000 R09: 0000000000000002 R10: 0000000081360a66 R11: 0000000000000293 R12: 00007f4ac8600438 R13: ffffffffffffffff R14: 00007f4ac8600000 R15: 00000000000c13ce Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 6 locks held by kworker/1:1/44: 5 locks held by kworker/u8:3/50: 3 locks held by kworker/u8:7/1271: #0: ffff888015acb148 ( (wq_completion)netns ){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] ){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc90004e7fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffffffff8e137280 ( rcu_state.barrier_mutex ){+.+.}-{3:3} , at: rcu_barrier+0x4c/0x550 kernel/rcu/tree.c:4073 2 locks held by getty/4816: #0: ffff88802ac320a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 ( &ldata->atomic_read_lock ){+.+.}-{3:3} , at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201 3 locks held by kworker/1:4/5095: 3 locks held by kworker/0:3/5119: 3 locks held by kworker/0:4/5120: 3 locks held by kworker/1:6/5122: #0: ffff888014c78948 ( (wq_completion)events ){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] ){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc90004897d00 (fqdir_free_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc90004897d00 (fqdir_free_work){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffffffff8e137280 ( rcu_state.barrier_mutex ){+.+.}-{3:3} , at: rcu_barrier+0x4c/0x550 kernel/rcu/tree.c:4073 3 locks held by kworker/0:6/5151: 5 locks held by kworker/u9:3/19360: #0: ffff88805d20a948 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff88805d20a948 ((wq_completion)hci6){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc90003267d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3230 [inline] , at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffff88804a781060 ( &hdev->req_lock ){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309 #3: ffff88804a780078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5542 #4: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #4: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939 2 locks held by syz-executor.4/20467: #0: ffffffff8f37b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f37b588 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592 #1: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #1: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x463/0x820 kernel/rcu/tree_exp.h:939 ============================================= NMI backtrace for cpu 1