INFO: task syz-executor:5174 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:5174 ppid:1 flags:0x00000009 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xdd0/0x1b0c kernel/sched/core.c:6562 schedule+0xc4/0x170 kernel/sched/core.c:6638 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6697 __mutex_lock_common+0xafc/0x1f60 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1444 jfs_umount+0x244/0x328 fs/jfs/jfs_umount.c:116 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x324 fs/super.c:501 kill_block_super+0x70/0xdc fs/super.c:1470 deactivate_locked_super+0xac/0x120 fs/super.c:332 deactivate_super+0xe4/0x104 fs/super.c:363 cleanup_mnt+0x390/0x418 fs/namespace.c:1191 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198 task_work_run+0x1ec/0x278 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x1fa0/0x2aa4 arch/arm64/kernel/signal.c:1151 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 3 locks held by kworker/0:0/7: #0: ffff0000c0021938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff80001c9a7c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff8000153fd008 (rcu_state.exp_wake_mutex){+.+.}-{3:3}, at: rcu_exp_wait_wake kernel/rcu/tree_exp.h:704 [inline] #2: ffff8000153fd008 (rcu_state.exp_wake_mutex){+.+.}-{3:3}, at: rcu_exp_sel_wait_wake+0x199c/0x21dc kernel/rcu/tree_exp.h:733 1 lock held by rcu_tasks_kthre/12: #0: ffff8000153f7c30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffff8000153f8450 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517 1 lock held by khungtaskd/28: #0: ffff8000153f72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4078: #0: ffff0000d7111098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80002099e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198 2 locks held by syz-executor/4323: #0: ffff0000dab8a0e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff8000157def28 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/4327: #0: ffff0000cfa140e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff8000157def28 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1444 2 locks held by kworker/1:6/4428: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000214e7c20 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 5 locks held by kworker/u4:8/4480: #0: ffff0000c0845138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000214f7c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 #2: ffff800017882f90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x134/0xa84 net/core/net_namespace.c:594 #3: ffff0000d428d2f8 (&devlink->lock_key#11){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0xfc/0x2b0 net/devlink/leftover.c:12502 #4: ffff80001788f848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 2 locks held by syz-executor/4735: #0: ffff0000d29600e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff8000157def28 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/4827: #0: ffff0000dd3320e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff8000157def28 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/4960: #0: ffff00010c93a0e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff8000157def28 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/5174: #0: ffff000104c880e0 (&type->s_umount_key#58){+.+.}-{3:3}, at: deactivate_super+0xdc/0x104 fs/super.c:362 #1: ffff8000157def28 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1444 2 locks held by kworker/1:12/5783: #0: ffff0000c0021938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x6b8/0x13a4 kernel/workqueue.c:2265 #1: ffff8000230a7c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6fc/0x13a4 kernel/workqueue.c:2267 1 lock held by syz.1.442/6431: #0: ffff8000153fcf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #0: ffff8000153fcf78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2b8/0x77c kernel/rcu/tree_exp.h:962 3 locks held by syz.4.456/6447: #0: ffff0000de22d468 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:526 [inline] #0: ffff0000de22d468 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x20c/0x4c0 net/bluetooth/hci_core.c:2731 #1: ffff0000de22c428 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x3a8/0xee8 net/bluetooth/hci_sync.c:5233 #2: ffff8000179e47a8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1829 [inline] #2: ffff8000179e47a8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xb0/0x26c net/bluetooth/hci_conn.c:2504 1 lock held by syz.3.795/8045: #0: ffff80001788f848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.3.795/8047: #0: ffff80001788f848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.3.795/8053: #0: ffff80001788f848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz.3.795/8057: #0: ffff80001788f848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:74 1 lock held by syz-executor/8050: #0: ffff80001788f848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline] #0: ffff80001788f848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x650/0xcdc net/core/rtnetlink.c:6147 =============================================