INFO: task syz.2.324:4960 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.324 state:D stack:0 pid:4960 tgid:4960 ppid:4723 task_flags:0x400040 flags:0x00000011 Call trace: __switch_to+0x5e4/0xb74 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5526 [inline] __schedule+0x1e0c/0x38a4 kernel/sched/core.c:7277 __schedule_loop kernel/sched/core.c:7354 [inline] schedule+0x1b4/0x274 kernel/sched/core.c:7369 schedule_timeout+0x68/0x1e4 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common kernel/sched/completion.c:121 [inline] wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion+0x1bc/0x418 kernel/sched/completion.c:153 __synchronize_srcu+0x1cc/0x20c kernel/rcu/srcutree.c:1477 synchronize_srcu+0x668/0x8dc kernel/rcu/srcutree.c:-1 mmu_notifier_unregister+0x33c/0x444 mm/mmu_notifier.c:877 kvm_destroy_vm virt/kvm/kvm_main.c:1277 [inline] kvm_put_kvm+0x69c/0xbbc virt/kvm/kvm_main.c:1332 kvm_vm_release+0x58/0x78 virt/kvm/kvm_main.c:1355 __fput+0x4b0/0x97c fs/file_table.c:512 ____fput+0x20/0x30 fs/file_table.c:540 task_work_run+0x1b8/0x254 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:70 [inline] exit_to_user_mode_loop+0x110/0x188 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:108 [inline] el0_svc+0x18c/0x240 arch/arm64/kernel/entry-common.c:759 el0t_64_sync_handler+0x68/0xdc arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Showing all locks held in the system: locks held by khungtaskd/26: 1, last CPU#0: #0: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6871 locks held by getty/3245: 2, on CPU#0: #0: 21f000001342e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: 57ff80008d7db2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x314/0x11f8 drivers/tty/n_tty.c:2211 locks held by syz-executor/3372: 2, last CPU#0: #0: 93f0000016a261f8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: 93f0000016a261f8 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0xf4/0xb64 mm/mmap.c:1299 #1: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x50/0x22c mm/pgtable-generic.c:290 locks held by kworker/u4:1/3856: 3, last CPU#0: #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a9ed7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a9ed7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: fff0000074c0dcd8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1004 [inline] #2: fff0000074c0dcd8 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x5cc/0xe90 kernel/time/timer.c:1085 locks held by kworker/u4:2/4725: 3, last CPU#0: #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008fcd7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008fcd7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 78f000001f976a58 (&devlink->lock_key){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by syz.1.326/4728: 2, last CPU#0: #0: ffff800088acc330 (srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #0: ffff800088acc330 (srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #0: ffff800088acc330 (srcu){.+.+}-{0:0}, at: mn_hlist_release mm/mmu_notifier.c:337 [inline] #0: ffff800088acc330 (srcu){.+.+}-{0:0}, at: __mmu_notifier_release+0x4e8/0x87c mm/mmu_notifier.c:385 #1: 4df000002084b518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #1: 4df000002084b518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #1: 4df000002084b518 (&kvm->srcu){.+.+}-{0:0}, at: kvm_mmu_notifier_release+0x50/0xc4 virt/kvm/kvm_main.c:874 locks held by kworker/u4:5/4743: 2, on CPU#0: #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008f107ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008f107ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 locks held by kworker/u4:6/4821: 3, last CPU#0: #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008f5b7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008f5b7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: b9f000001f625a58 (&devlink->lock_key#6){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:9/4871: 3, last CPU#0: #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 1af000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008f787ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008f787ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 5af0000020476a58 (&devlink->lock_key#2){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by modprobe/5161: 1, last CPU#0: #0: 71f0000014156c78 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:544 [inline] #0: 71f0000014156c78 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x1b0/0xb64 mm/mmap.c:1323 =============================================