INFO: task kworker/0:10:4971 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:10 state:D stack:0 pid:4971 ppid:2 flags:0x00000008 Workqueue: events_long flush_old_commits Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5257 [inline] __schedule+0xdb4/0x1aa4 kernel/sched/core.c:6584 schedule+0xc4/0x170 kernel/sched/core.c:6660 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6719 __mutex_lock_common+0xb38/0x1f88 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_sync_fs fs/reiserfs/super.c:76 [inline] flush_old_commits+0x1a4/0x2c0 fs/reiserfs/super.c:111 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439 kthread+0x254/0x2e0 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854 INFO: task syz.2.358:6258 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.358 state:D stack:0 pid:6258 ppid:4337 flags:0x00000001 Call trace: __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555 context_switch kernel/sched/core.c:5257 [inline] __schedule+0xdb4/0x1aa4 kernel/sched/core.c:6584 schedule+0xc4/0x170 kernel/sched/core.c:6660 rwsem_down_write_slowpath+0xbd4/0x1324 kernel/locking/rwsem.c:1189 __down_write_common kernel/locking/rwsem.c:1314 [inline] __down_write kernel/locking/rwsem.c:1323 [inline] down_write+0x84/0x88 kernel/locking/rwsem.c:1574 inode_lock include/linux/fs.h:764 [inline] do_truncate+0x174/0x20c fs/open.c:63 handle_truncate fs/namei.c:3336 [inline] do_open fs/namei.c:3681 [inline] path_openat+0x21c8/0x27a0 fs/namei.c:3838 do_filp_open+0x198/0x38c fs/namei.c:3865 do_sys_openat2+0x134/0x3fc fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __arm64_sys_openat+0x11c/0x150 fs/open.c:1347 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff8000165b7ed0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc64 kernel/rcu/tasks.h:543 1 lock held by rcu_tasks_trace/13: #0: ffff8000165b8710 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xc64 kernel/rcu/tasks.h:543 1 lock held by khungtaskd/28: #0: ffff8000165b7580 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 2 locks held by getty/4084: #0: ffff0000d6ced098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800021ade2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2e8/0xffc drivers/tty/n_tty.c:2198 1 lock held by syz-executor/4339: #0: ffff0000da2511e0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:521 [inline] #0: ffff0000da2511e0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x204/0x4d8 net/bluetooth/hci_core.c:2720 2 locks held by kworker/0:4/4411: #0: ffff0000c0021938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800022447c40 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 1 lock held by syz-executor/4699: #0: ffff8000165bd2b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #0: ffff8000165bd2b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2b4/0x780 kernel/rcu/tree_exp.h:962 4 locks held by kworker/0:10/4971: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800022a57c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000dc0b80e0 (&type->s_umount_key#84){++++}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000cdd80090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 2 locks held by kworker/0:11/4972: #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800023857c40 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 3 locks held by syz.2.358/6253: 2 locks held by syz.2.358/6258: #0: ffff0000dc0b8460 (sb_writers#28){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402 #1: ffff0000f8bf9020 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline] #1: ffff0000f8bf9020 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: do_truncate+0x174/0x20c fs/open.c:63 =============================================