INFO: task syz-executor.0:6021 blocked for more than 143 seconds. Not tainted 6.3.0-rc5-syzkaller-g9a03cbd79d3a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:6021 ppid:1 flags:0x00000009 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5307 [inline] __schedule+0x1048/0x1e38 kernel/sched/core.c:6625 schedule+0xc4/0x170 kernel/sched/core.c:6701 schedule_timeout+0x1d8/0x348 kernel/time/timer.c:2167 gfs2_gl_hash_clear+0x178/0x2e0 fs/gfs2/glock.c:2198 gfs2_put_super+0x640/0x6d4 fs/gfs2/super.c:633 generic_shutdown_super+0x130/0x328 fs/super.c:500 kill_block_super+0x70/0xdc fs/super.c:1407 gfs2_kill_sb+0x2cc/0x330 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1302 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015e5f250 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffff800015e5fa50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510 1 lock held by khungtaskd/28: #0: ffff800015e5f080 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 1 lock held by klogd/5509: 2 locks held by getty/5670: #0: ffff0000d83ec098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001aad02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.0/6021: #0: ffff0000dbb860e0 (&type->s_umount_key#105){+.+.}-{3:3}, at: deactivate_super+0xd8/0x100 fs/super.c:361 =============================================