INFO: task syz-executor:4798 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: 4798 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:4802 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: 4802 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: ffff800014461360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312 2 locks held by kworker/u4:3/346: 1 lock held by udevd/3662: 2 locks held by getty/3805: #0: ffff0000d4802098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001bf1b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 2 locks held by syz-executor/4798: #0: ffff0000cfa640e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4802: #0: ffff0000d08180e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4807: #0: ffff0000d01280e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5828: #0: ffff0000d41f60e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5860: #0: ffff0000d0fba0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5863: #0: ffff0000ece0a0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5868: #0: ffff0000c1e4c0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5869: #0: ffff0000c21960e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5981: #0: ffff0000ca47c0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 #1: ffff8000147f9328 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x4c8 fs/jfs/jfs_logmgr.c:1452 1 lock held by syz-executor/6056: #0: ffff0000e8a440e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: deactivate_super+0xe8/0x110 fs/super.c:365 3 locks held by udevd/6160: 1 lock held by udevd/6228: 1 lock held by syz.1.1626/9338: 2 locks held by syz.5.1627/9340: 2 locks held by syz.7.1628/9342: 2 locks held by syz.0.1629/9344: =============================================