INFO: task syz.7.902:7904 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.7.902 state:D stack:0 pid:7904 tgid:7904 ppid:7532 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 INFO: task syz.7.902:7909 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.7.902 state:D stack:0 pid:7909 tgid:7904 ppid:7532 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_close_sync+0xd0/0x240 fs/file_table.c:617 __do_sys_close fs/open.c:1560 [inline] __se_sys_close fs/open.c:1545 [inline] __arm64_sys_close+0x90/0x140 fs/open.c:1545 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x94/0x1ec arch/arm64/kernel/syscall.c:49 el0_svc_common+0x120/0x2f4 arch/arm64/kernel/syscall.c:121 do_el0_svc+0x58/0x74 arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x240 arch/arm64/kernel/entry-common.c:758 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 kworker/u4:4/49: 2, on CPU#0: #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008dca7ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008dca7ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 locks held by getty/3248: 2, on CPU#0: #0: cef000001342e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: d6ff80008d7db2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x314/0x11f8 drivers/tty/n_tty.c:2211 locks held by syz-executor/3376: 2, last CPU#0: #0: 04f00000178e1878 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: 04f00000178e1878 (&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/u4:7/3503: 3, last CPU#0: #0: 0cf000000dc33d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 0cf000000dc33d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008ff97ce8 ((work_completion)(&(&gc_work->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008ff97ce8 ((work_completion)(&(&gc_work->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #2: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: gc_worker+0x234/0x14c4 net/netfilter/nf_conntrack_core.c:1532 locks held by kworker/u4:3/6163: 2, on CPU#0: #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a0327ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a0327ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 locks held by kworker/u4:6/6168: 3, last CPU#0: #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a0307ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a0307ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: baf000002a0afa58 (&devlink->lock_key#10){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:2/7196: 3, last CPU#0: #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a0337ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a0337ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 45f000001ffc8258 (&devlink->lock_key#8){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by syz.8.901/7900: 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: 78f000001b5db518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #1: 78f000001b5db518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #1: 78f000001b5db518 (&kvm->srcu){.+.+}-{0:0}, at: kvm_mmu_notifier_release+0x50/0xc4 virt/kvm/kvm_main.c:874 locks held by kworker/u4:0/7940: 3, last CPU#0: #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a3d27ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a3d27ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 14f000001927aa58 (&devlink->lock_key#3){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:1/7944: 3, last CPU#0: #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a3d97ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a3d97ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 3ff000001f86ca58 (&devlink->lock_key#5){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:13/8045: 3, last CPU#0: #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: cef000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008f9c7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008f9c7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 9cf0000020c3fa58 (&devlink->lock_key#6){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by modprobe/8048: 1, last CPU#0: #0: 62f00000136ab460 (sb_writers#4){.+.+}-{0:0}, at: pick_link+0x9a0/0x1014 fs/namei.c:2049 locks held by modprobe/8049: 2, last CPU#0: #0: 56f000001b6bccf8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline] #0: 56f000001b6bccf8 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x12c/0x3cc mm/util.c:579 #1: fff0000074c21ea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:677 [inline] #1: fff0000074c21ea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1678 [inline] #1: fff0000074c21ea0 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:2016 [inline] #1: fff0000074c21ea0 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x364/0x38a4 kernel/sched/core.c:7151 =============================================