INFO: task syz-executor:6711 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:6711 tgid:6711 ppid:1 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 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:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz-executor:6861 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:6861 tgid:6861 ppid:1 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 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:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz-executor:6862 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:6862 tgid:6862 ppid:1 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 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:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz-executor:6923 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:6923 tgid:6923 ppid:1 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 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:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz-executor:6930 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:6930 tgid:6930 ppid:1 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 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:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 INFO: task syz-executor:6933 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:6933 tgid:6933 ppid:1 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1250/0x2a7c kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6960 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692 __mutex_lock kernel/locking/mutex.c:776 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828 lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 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:643 kill_block_super+0x44/0x90 fs/super.c:1722 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Showing all locks held in the system: 1 lock held by khungtaskd/32: #0: ffff80008fa5b520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 1 lock held by klogd/6203: 2 locks held by getty/6357: #0: ffff0000ceb830a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099f1e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfc8 drivers/tty/n_tty.c:2211 2 locks held by syz-executor/6711: #0: ffff0000d83580e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d83580e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d83580e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/6722: #0: ffff0000d7fe60e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d7fe60e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d7fe60e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/6861: #0: ffff0000d121e0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d121e0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d121e0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/6862: #0: ffff0000dffda0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000dffda0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000dffda0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/6923: #0: ffff0000f03960e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000f03960e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000f03960e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/6930: #0: ffff0000daf780e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000daf780e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000daf780e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/6933: #0: ffff0000c25a80e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000c25a80e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000c25a80e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/7019: #0: ffff0000c6ebe0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000c6ebe0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000c6ebe0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 2 locks held by syz-executor/7021: #0: ffff0000e0dda0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000e0dda0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000e0dda0e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff80008fe9dd68 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb0/0x4c4 fs/jfs/jfs_logmgr.c:1443 1 lock held by syz-executor/10384: #0: ffff0000d40840e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000d40840e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000d40840e0 (&type->s_umount_key#54){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 2 locks held by syz.1.3332/10751: 3 locks held by syz.6.3333/10752: 3 locks held by syz.4.3335/10754: =============================================