INFO: task syz.6.556:6530 blocked for more than 430 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.6.556 state:D stack:0 pid:6530 tgid:6530 ppid:5530 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 kworker/u4:3/42: 3, last CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008dbe7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008dbe7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 3ff000001fa6a258 (&devlink->lock_key){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by getty/3248: 2, on CPU#0: #0: e3f00000134760a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: 09ff80008d7db2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x314/0x11f8 drivers/tty/n_tty.c:2211 locks held by sshd-session/3372: 4, last CPU#0: #0: b6f0000017dbc0e0 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline] #0: b6f0000017dbc0e0 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg+0x30/0x64 net/ipv4/tcp.c:1450 #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: __ip_queue_xmit+0x8c/0x1940 net/ipv4/ip_output.c:476 #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: ip_output+0x80/0x480 net/ipv4/ip_output.c:432 #3: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #3: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffff800088a7e858 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0xa9c/0x178c net/ipv4/ip_output.c:229 locks held by syz-executor/3373: 2, last CPU#0: #0: 34f0000017da76f8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: 34f0000017da76f8 (&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/u4:6/4109: 2, on CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008df97ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008df97ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 locks held by kworker/u4:7/4705: 3, last CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 98f000000dc34140 ((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: a4f00000274f9a58 (&devlink->lock_key#8){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/0:2/5416: 3, last CPU#0: #0: aff000000dc17d40 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: aff000000dc17d40 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008f9f7ce8 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008f9f7ce8 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 30f0000029639a50 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x188/0x3f0 drivers/net/netdevsim/fib.c:1490 locks held by kworker/u4:1/5500: 3, last CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a0057ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a0057ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: a4f00000274f9a58 (&devlink->lock_key#8){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:8/5532: 3, last CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a0537ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a0537ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 4ef000002048ca58 (&devlink->lock_key#2){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:11/5577: 3, last CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff80008f3d7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008f3d7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 5ff0000020a2a258 (&devlink->lock_key#4){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/u4:4/6525: 3, last CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b8 kernel/workqueue.c:3479 #1: ffff8000a16c7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a16c7ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b8 kernel/workqueue.c:3479 #2: 9cf0000018f13a58 (&devlink->lock_key#6){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by syz.5.555/6526: 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: b4f0000020a89518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #1: b4f0000020a89518 (&kvm->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #1: b4f0000020a89518 (&kvm->srcu){.+.+}-{0:0}, at: kvm_mmu_notifier_release+0x50/0xc4 virt/kvm/kvm_main.c:874 locks held by syz-executor/6541: 1, on CPU#0: #0: ffff800088b1f928 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #0: ffff800088b1f928 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #0: ffff800088b1f928 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline] #0: ffff800088b1f928 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_mount_permission+0x254/0x688 security/tomoyo/mount.c:238 locks held by syz-executor/6544: 1, on CPU#0: #0: ffff800088d70bf8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff800088d70bf8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:366 [inline] #0: ffff800088d70bf8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x9e4/0x1b0c net/core/rtnetlink.c:4219 locks held by kworker/u4:14/6702: 3, last CPU#0: #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_spin_rq_lock_nested kernel/sched/core.c:677 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: raw_spin_rq_lock kernel/sched/sched.h:1678 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rq_lock kernel/sched/sched.h:2016 [inline] #0: 98f000000dc34140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: __schedule+0x364/0x38a4 kernel/sched/core.c:7151 #1: fff0000074c0c248 (psi_seq){-.-.}-{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 modprobe/6716: 2, last CPU#0: #0: 6df0000013a1e1f8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline] #0: 6df0000013a1e1f8 (&mm->mmap_lock){++++}-{4:4}, at: do_mprotect_pkey+0x204/0xb70 mm/mprotect.c:902 #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 =============================================