INFO: task syz.3.112:4241 blocked for more than 430 seconds. Not tainted syzkaller #0 Blocked by coredump. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.112 state:D stack:0 pid:4241 tgid:4241 ppid:3841 task_flags:0x40004c flags:0x00000018 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_vcpu_release+0x70/0x9c virt/kvm/kvm_main.c:4099 __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 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x890/0x23d8 kernel/exit.c:1011 do_group_exit+0x288/0x2ac kernel/exit.c:1154 __do_sys_exit_group kernel/exit.c:1165 [inline] __se_sys_exit_group kernel/exit.c:1163 [inline] __arm64_sys_exit_group+0x44/0x4c kernel/exit.c:1163 __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 kworker/u4:1/21: 2, last CPU#0: #0: 93f000000dc33d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 93f000000dc33d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008d877ce8 ((gc_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008d877ce8 ((gc_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 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/3246: 2, on CPU#0: #0: 81f00000134760a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: 9bff80008d7db2e8 (&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: 7bf00000165dd778 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: 7bf00000165dd778 (&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/u4:5/3459: 3, last CPU#0: #0: 3df000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 3df000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008ff17ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008ff17ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 7bf000001ff04258 (&devlink->lock_key#2){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:7/3504: 3, last CPU#0: #0: 3df000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 3df000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008ff87ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008ff87ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 05f00000206bea58 (&devlink->lock_key#5){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by syz.2.111/4240: 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: cdf00000223dd518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #1: cdf00000223dd518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #1: cdf00000223dd518 (&kvm->srcu){.+.+}-{0:0}, at: kvm_mmu_notifier_release+0x50/0xc4 virt/kvm/kvm_main.c:874 locks held by kworker/u4:3/4363: 2, last CPU#0: #0: 93f000000dc33d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 93f000000dc33d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008ef97ce8 ((work_completion)(&(&gc_work->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008ef97ce8 ((work_completion)(&(&gc_work->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 locks held by kworker/u4:11/4393: 3, last CPU#0: #0: 3df000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 3df000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008f817ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: psi_task_switch+0x6c/0x6e8 kernel/sched/psi.c:933 #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 syz-executor/4501: 5, last CPU#0: #0: ffff800088d6ee58 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x614/0x754 net/core/net_namespace.c:578 #1: ffff800088cc40a8 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x194/0x268 drivers/infiniband/core/device.c:1221 #2: ffff800088cc41d8 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x1d0/0x268 drivers/infiniband/core/device.c:1226 #3: e9f000001a06f030 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0xf4/0x5bc drivers/infiniband/core/device.c:976 #4: adf000000e2c9980 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_add_one+0x48/0x70c fs/kernfs/dir.c:825 locks held by syz-executor/4508: 1, last CPU#0: #0: ffff800088d6ee58 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x614/0x754 net/core/net_namespace.c:578 =============================================