INFO: task kworker/0:2:113 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:0 pid:113 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 Showing all locks held in the system: 4 locks held by kworker/0:0/7: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff80001db97c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000d0ff80e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000ce810090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 2 locks held by kworker/u4:0/9: 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 4 locks held by kworker/0:1/14: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff80001dc07c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000c34120e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000ee3ef090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 1 lock held by khungtaskd/28: #0: ffff8000165b7580 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349 4 locks held by kworker/0:2/113: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff8000217d7c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000da19e0e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000c4642090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 4 locks held by kworker/1:3/3903: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800025fd7c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000e96640e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000d0416090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 2 locks held by getty/4083: #0: ffff0000d8221098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800021b9b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2e8/0xffc drivers/tty/n_tty.c:2198 4 locks held by kworker/0:4/4447: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800022287c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000cc6a20e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000d2252090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 4 locks held by kworker/0:5/4449: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff8000223a7c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000f40940e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000f4088090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 4 locks held by kworker/0:6/4450: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800022367c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000f3dc60e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000c3b45090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 4 locks held by kworker/0:8/4455: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff800022327c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000cf0a60e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000c4487090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 4 locks held by kworker/1:5/4491: #0: ffff0000c0021138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x69c/0x13bc kernel/workqueue.c:-1 #1: ffff8000225a7c40 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6e8/0x13bc kernel/workqueue.c:2267 #2: ffff0000ddac60e0 (&type->s_umount_key#50){.+.+}-{3:3}, at: flush_old_commits+0xcc/0x2c0 fs/reiserfs/super.c:97 #3: ffff0000d9cc3090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 3 locks held by syz.0.17/4520: 3 locks held by syz.1.18/4551: 3 locks held by syz.2.19/4569: 3 locks held by syz.3.20/4588: 3 locks held by syz.4.21/4614: 3 locks held by syz.5.22/4639: 3 locks held by syz.6.23/4671: 3 locks held by syz.7.24/4697: 3 locks held by syz.8.25/4722: 3 locks held by syz.9.26/4748: =============================================