INFO: task syz-executor.1:5068 blocked for more than 430 seconds. Not tainted 6.8.0-rc4-syzkaller-00388-gced590523156 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:5068 tgid:5065 ppid:3322 flags:0x0000000d Call trace: __switch_to+0x1c8/0x2a0 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0xad8/0x2ae8 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xd0/0x24c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 rwsem_down_read_slowpath+0x3fc/0x7d8 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x14c/0x314 kernel/locking/rwsem.c:1528 __super_lock fs/super.c:58 [inline] super_lock+0x208/0x278 fs/super.c:120 super_lock_shared fs/super.c:139 [inline] iterate_supers+0xb4/0x1c4 fs/super.c:924 ksys_sync+0xa8/0x150 fs/sync.c:102 __arm64_sys_sync+0x10/0x20 fs/sync.c:113 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:51 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:136 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x140 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 4 locks held by kworker/0:0/8: #0: ffff00006a89e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:559 [inline] #0: ffff00006a89e998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1385 [inline] #0: ffff00006a89e998 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1699 [inline] #0: ffff00006a89e998 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x268/0x2ae8 kernel/sched/core.c:6643 #1: ffff00006a88bcc8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x258/0x74c kernel/sched/psi.c:988 #2: ffff00006a88cb98 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0xbc/0x198 kernel/time/timer.c:999 #3: ffff80008934f0c8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x170/0x404 lib/debugobjects.c:708 1 lock held by khungtaskd/29: #0: ffff8000867f7140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x44/0x2d4 kernel/locking/lockdep.c:6608 2 locks held by getty/3096: #0: ffff0000148030a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000895bb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x93c/0xe9c drivers/tty/n_tty.c:2201 2 locks held by syz-executor.0/3165: 2 locks held by kworker/u4:1/4656: 1 lock held by syz-executor.1/5068: #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: super_lock+0x208/0x278 fs/super.c:120 1 lock held by syz-executor.0/5164: #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: super_lock+0x208/0x278 fs/super.c:120 1 lock held by syz-executor.1/5225: #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: super_lock+0x208/0x278 fs/super.c:120 1 lock held by syz-executor.0/5302: #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: super_lock+0x208/0x278 fs/super.c:120 1 lock held by syz-executor.1/5376: #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: super_lock+0x208/0x278 fs/super.c:120 1 lock held by syz-executor.0/5449: #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: super_lock+0x208/0x278 fs/super.c:120 1 lock held by syz-executor.1/5521: #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff000017c840e0 (&type->s_umount_key#61){++++}-{3:3}, at: super_lock+0x208/0x278 fs/super.c:120 1 lock held by modprobe/5578: =============================================