INFO: task syz-executor326:6486 blocked for more than INFO: task syz-executor326:6486 blocked for more than 143 seconds. Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor326 state:D stack:0 pid:6486 tgid:6486 ppid:6485 task_flags:0x400140 flags:0x00000018 Call trace: __switch_to+0x414/0x834 arch/arm64/kernel/process.c:734 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 jfs_umount+0x26c/0x350 fs/jfs/jfs_umount.c:114 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1710 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1435 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008f4f88a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by pr/ttyAMA0/46: 2 locks held by kworker/u8:5/260: #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009bc37bc0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 2 locks held by getty/6252: #0: ffff0000d2ddd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5be2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 2 locks held by syz-executor326/6486: #0: ffff0000c756c0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000c756c0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000c756c0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 #1: ffff80008f918608 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 1 lock held by syz-executor326/6487: #0: ffff0000ce8d00e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000ce8d00e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000ce8d00e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 2 locks held by syz-executor326/6489: #0: ffff0000cd5aa0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000cd5aa0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000cd5aa0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 #1: ffff80008f918608 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor326/6490: #0: ffff0000cdc200e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000cdc200e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000cdc200e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 #1: ffff80008f918608 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor326/6491: #0: ffff0000cb31e0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline] #0: ffff0000cb31e0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff0000cb31e0e0 (&type->s_umount_key#42){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505 #1: ffff80008f918608 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1444 =============================================