INFO: task syz-executor:4811 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: 4811 ppid: 1 flags:0x00000009 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xdfc/0x1bc4 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6537 __mutex_lock_common+0xac8/0x1f14 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 jfs_umount+0x244/0x328 fs/jfs/jfs_umount.c:116 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_block_super+0x70/0xdc fs/super.c:1427 deactivate_locked_super+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1d0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz-executor:4820 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: 4820 ppid: 1 flags:0x00000009 Call trace: __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xdfc/0x1bc4 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6537 __mutex_lock_common+0xac8/0x1f14 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743 lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 jfs_umount+0x244/0x328 fs/jfs/jfs_umount.c:116 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x2f0 fs/super.c:475 kill_block_super+0x70/0xdc fs/super.c:1427 deactivate_locked_super+0xb8/0x134 fs/super.c:335 deactivate_super+0xf0/0x110 fs/super.c:366 cleanup_mnt+0x3b8/0x46c fs/namespace.c:1148 __cleanup_mnt+0x20/0x30 fs/namespace.c:1155 task_work_run+0x12c/0x1d8 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] do_notify_resume+0x2450/0x309c arch/arm64/kernel/signal.c:949 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xf0/0x1d0 arch/arm64/kernel/entry-common.c:609 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800014471360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312 1 lock held by udevd/3660: 2 locks held by getty/3801: #0: ffff0000d4a88098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001be0e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 4 locks held by kworker/1:20/4157: #0: ffff0001a0fb6958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:475 [inline] #0: ffff0001a0fb6958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1326 [inline] #0: ffff0001a0fb6958 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1621 [inline] #0: ffff0001a0fb6958 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x314/0x1bc4 kernel/sched/core.c:6309 #1: ffff0001a0fa3c88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x43c/0x67c kernel/sched/psi.c:891 #2: ffff0001a0fa44d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x11c/0x224 kernel/time/timer.c:946 #3: ffff80001b1369d0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x7c/0x4b4 lib/debugobjects.c:694 2 locks held by syz-executor/4811: #0: ffff0000edb0a0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4819: #0: ffff0000dbb3c0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4820: #0: ffff0000d55060e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5556: #0: ffff0000cf0240e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5581: #0: ffff0000ed3280e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5585: #0: ffff0000cb1b20e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5588: #0: ffff0000efa380e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5609: #0: ffff0000f057c0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5680: #0: ffff0000d60b60e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000148092a8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 1 lock held by udevd/5681: 3 locks held by syz-executor/5716: #0: ffff0001a0f95958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:475 [inline] #0: ffff0001a0f95958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1326 [inline] #0: ffff0001a0f95958 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1621 [inline] #0: ffff0001a0f95958 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x314/0x1bc4 kernel/sched/core.c:6309 #1: ffff8000142e3c18 (cpu_asid_lock){....}-{2:2}, at: check_and_switch_context+0x13c/0x6b0 arch/arm64/mm/context.c:246 #2: ffff800014471360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312 1 lock held by syz-executor/5734: #0: ffff0001062f00e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 2 locks held by syz.3.1685/9111: 2 locks held by syz.5.1686/9113: 2 locks held by syz.4.1687/9115: =============================================