INFO: task syz.0.975:7013 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.0.975 state:D stack:0 pid:7013 tgid:7013 ppid:3391 task_flags:0x40044c 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/0x38cc 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+0x1b8/0x414 kernel/sched/completion.c:153 __synchronize_srcu+0x1c8/0x208 kernel/rcu/srcutree.c:1477 synchronize_srcu+0x668/0x8dc kernel/rcu/srcutree.c:-1 mn_hlist_release mm/mmu_notifier.c:373 [inline] __mmu_notifier_release+0x688/0x87c mm/mmu_notifier.c:385 mmu_notifier_release include/linux/mmu_notifier.h:443 [inline] exit_mmap+0xcc/0xb64 mm/mmap.c:1297 __mmput+0x10c/0x51c kernel/fork.c:1193 mmput+0x70/0xa8 kernel/fork.c:1216 exit_mm+0x1e8/0x2fc kernel/exit.c:617 do_exit+0x828/0x23d8 kernel/exit.c:999 do_group_exit+0x1d4/0x2ac kernel/exit.c:1154 get_signal+0x13f8/0x1504 kernel/signal.c:3051 arch_do_signal_or_restart+0x23c/0x4b50 arch/arm64/kernel/signal.c:1665 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x88/0x188 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: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6871 locks held by syslogd/3183: 1, last CPU#0: #0: cdf000000ea415f0 (&u->iolock){+.+.}-{4:4}, at: __unix_dgram_recvmsg+0x118/0xbfc net/unix/af_unix.c:2587 locks held by getty/3252: 2, on CPU#0: #0: 28f00000123a60a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: 3cff80008cd2b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x314/0x11f8 drivers/tty/n_tty.c:2211 locks held by sshd-session/3383: 1, last CPU#0: #0: 11f0000015a9d9e0 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline] #0: 11f0000015a9d9e0 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg+0x30/0x64 net/ipv4/tcp.c:1450 locks held by syz-executor/3385: 2, last CPU#0: #0: f7f0000015a822f8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline] #0: f7f0000015a822f8 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0xf4/0xb64 mm/mmap.c:1299 #1: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x50/0x22c mm/pgtable-generic.c:290 locks held by kworker/u4:5/4572: 3, last CPU#0: #0: 03f000000d034140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 03f000000d034140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b4 kernel/workqueue.c:3479 #1: ffff8000a3d67ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff8000a3d67ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b4 kernel/workqueue.c:3479 #2: aff000001ad9fa58 (&devlink->lock_key#5){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:314 locks held by kworker/0:6/5771: 2, last CPU#0: #0: 22f000001fb6b340 ((wq_completion)wg-crypt-wg1#4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 22f000001fb6b340 ((wq_completion)wg-crypt-wg1#4){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b4 kernel/workqueue.c:3479 #1: ffff80008e607ce8 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008e607ce8 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b4 kernel/workqueue.c:3479 locks held by kworker/u4:1/5790: 3, on CPU#0: #0: 4cf0000012140140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 4cf0000012140140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b4 kernel/workqueue.c:3479 #1: ffff80008e8c7ce8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008e8c7ce8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b4 kernel/workqueue.c:3479 #2: ffff8000882c43b8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 locks held by kworker/u4:8/6110: 2, on CPU#0: #0: 03f000000d034140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 03f000000d034140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b4 kernel/workqueue.c:3479 #1: ffff80008ecb7ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008ecb7ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b4 kernel/workqueue.c:3479 locks held by kworker/u4:0/6680: 3, last CPU#0: #0: 03f000000d034140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 03f000000d034140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b4 kernel/workqueue.c:3479 #1: ffff8000a0697ce8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: psi_task_switch+0x6c/0x6e8 kernel/sched/psi.c:933 #2: fff0000074cb8cd8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base kernel/time/timer.c:1004 [inline] #2: fff0000074cb8cd8 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x5cc/0xe90 kernel/time/timer.c:1085 locks held by syz.2.974/7006: 2, last CPU#0: #0: ffff80008801bf70 (srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #0: ffff80008801bf70 (srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #0: ffff80008801bf70 (srcu){.+.+}-{0:0}, at: mn_hlist_release mm/mmu_notifier.c:337 [inline] #0: ffff80008801bf70 (srcu){.+.+}-{0:0}, at: __mmu_notifier_release+0x4e8/0x87c mm/mmu_notifier.c:385 #1: 35f0000022143530 (&kvm->srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline] #1: 35f0000022143530 (&kvm->srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:305 [inline] #1: 35f0000022143530 (&kvm->srcu){.+.+}-{0:0}, at: kvm_mmu_notifier_release+0x50/0xc4 virt/kvm/kvm_main.c:874 locks held by kworker/u4:9/7109: 2, last CPU#0: #0: 1df000000d033d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3371 [inline] #0: 1df000000d033d40 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0xadc/0x16b4 kernel/workqueue.c:3479 #1: ffff80008f8d7ce8 ((gc_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline] #1: ffff80008f8d7ce8 ((gc_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xafc/0x16b4 kernel/workqueue.c:3479 locks held by syz-executor/7190: 1, last CPU#0: #0: ffff8000882c43b8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff8000882c43b8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:366 [inline] #0: ffff8000882c43b8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x9e4/0x1b0c net/core/rtnetlink.c:4219 locks held by modprobe/7348: 2, last CPU#0: #0: 45f0000012b7b088 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x150/0x41c mm/mmap_lock.c:310 #1: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffff800087fce618 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x50/0x22c mm/pgtable-generic.c:290 =============================================