INFO: task syz-executor.1:28238 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.1 state:D stack:24632 pid:28238 tgid:28238 ppid:26723 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x17d3/0x4a20 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+0x42b/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+0xfd/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f135ca7cc9a RSP: 002b:00007ffd30af0950 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007f135ca7cc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000032 R08: 0000001b2e820000 R09: 0000000000000002 R10: 000000008136099b R11: 0000000000000293 R12: 00007f135c600a80 R13: ffffffffffffffff R14: 00007f135c600000 R15: 0000000000131de6 Showing all locks held in the system: 3 locks held by kworker/u8:0/10: 3 locks held by kworker/1:0/24: 1 lock held by khungtaskd/29: #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 3 locks held by kworker/1:1/44: 3 locks held by kworker/u8:6/1095: #0: ffff888029892148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888029892148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc900045f7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc900045f7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4191 2 locks held by getty/4822: #0: ffff88802a2ce0a0 (&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/1:4/5093: 5 locks held by kworker/u8:9/5262: #0: ffff8880b953e358 ( &rq->__lock ){-.-.}-{2:2} , at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #1: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq ){-.-.}-{0:0} , at: process_one_work kernel/workqueue.c:3230 [inline] , at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffff8880b953e358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #3: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: update_rq_clock_task kernel/sched/core.c:726 [inline] #3: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: update_rq_clock+0x22b/0x8a0 kernel/sched/core.c:770 #4: ffff8880b952a758 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 kernel/time/timer.c:1051 3 locks held by kworker/1:5/24561: 3 locks held by kworker/0:1/14749: 3 locks held by kworker/u9:2/18682: #0: ffff888063c86948 ((wq_completion)hci7){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888063c86948 ((wq_completion)hci7){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc9000fcb7d00 ((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: ffff8880663e1060 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309 3 locks held by kworker/1:2/26693: 1 lock held by syz-executor.2/28277: 7 locks held by kworker/0:3/28288: 4 locks held by kworker/1:6/28415: #0: ffff888014c74948 ( (wq_completion)events ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3229 [inline] , at: process_scheduled_works+0x8e0/0x1770 kernel/workqueue.c:3335 #1: ffffc900036a7d00 ( (linkwatch_work).work ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3230 [inline] , at: process_scheduled_works+0x91b/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f38da88 (rtnl_mutex ){+.+.}-{3:3} , at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 #3: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #3: ffffffff8e1373b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x463/0x820 kernel/rcu/tree_exp.h:939 3 locks held by kworker/0:7/28581: 1 lock held by syz-executor.1/28630: #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/28706: #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592 1 lock held by syz-executor.4/28724: #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f38da88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x10d0 net/core/rtnetlink.c:6592 3 locks held by kworker/1:9/28768: 1 lock held by dhcpcd/28784: #0: ffff88807e6a3810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline] #0: ffff88807e6a3810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:658 [inline] #0: ffff88807e6a3810 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1421 1 lock held by dhcpcd/28788: #0: ffff88807bcae258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline] #0: ffff88807bcae258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcb0 net/packet/af_packet.c:3204 1 lock held by dhcpcd/28808: #0: ffff88805af00258 (