INFO: task kdevtmpfs:25 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kdevtmpfs state:D stack:0 pid:25 tgid:25 ppid:2 task_flags:0x208140 flags:0x00000008 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 __flush_workqueue+0x2d0/0xef8 kernel/workqueue.c:4000 md_alloc+0x40/0xca0 drivers/md/md.c:5862 md_alloc_and_put drivers/md/md.c:5951 [inline] md_probe drivers/md/md.c:5964 [inline] md_probe+0x30/0x54 drivers/md/md.c:5959 blk_probe_dev+0xec/0x168 block/genhd.c:823 blk_request_module+0x18/0xa4 block/genhd.c:836 blkdev_get_no_open+0x74/0xbc block/bdev.c:787 bdev_statx+0x8c/0x498 block/bdev.c:1288 vfs_getattr_nosec+0x290/0x374 fs/stat.c:224 vfs_getattr+0x40/0x54 fs/stat.c:259 handle_remove+0xec/0x4f8 drivers/base/devtmpfs.c:335 handle drivers/base/devtmpfs.c:395 [inline] devtmpfs_work_loop+0x264/0x634 drivers/base/devtmpfs.c:408 get_nid_for_pfn+0x0/0xd0 drivers/base/devtmpfs.c:450 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task kworker/u8:3:83 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:3 state:D stack:0 pid:83 tgid:83 ppid:2 task_flags:0x4288060 flags:0x00000008 Workqueue: netns cleanup_net Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 devtmpfs_submit_req+0xac/0x114 drivers/base/devtmpfs.c:122 devtmpfs_delete_node+0xd8/0x128 drivers/base/devtmpfs.c:171 device_del+0x59c/0x7b4 drivers/base/core.c:3834 device_unregister+0x20/0xbc drivers/base/core.c:3896 device_destroy+0x94/0xcc drivers/base/core.c:4450 macvtap_device_event+0x21c/0x330 drivers/net/macvtap.c:193 notifier_call_chain+0x11c/0x49c kernel/notifier.c:85 raw_notifier_call_chain+0x18/0x24 kernel/notifier.c:453 call_netdevice_notifiers_info+0x88/0xe8 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xac0/0x1be8 net/core/dev.c:11982 unregister_netdevice_many net/core/dev.c:12046 [inline] default_device_exit_batch+0x614/0x88c net/core/dev.c:12538 ops_exit_list+0xf0/0x140 net/core/net_namespace.c:177 cleanup_net+0x438/0x93c net/core/net_namespace.c:654 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task dhcpcd:3150 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:0 pid:3150 tgid:3150 ppid:1 task_flags:0x400140 flags:0x00000804 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:746 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:798 rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 vlan_ioctl_handler+0x190/0x974 net/8021q/vlan.c:554 sock_ioctl+0x430/0x5d4 net/socket.c:1275 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __arm64_sys_ioctl+0x12c/0x188 fs/ioctl.c:892 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0x164/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x10c/0x138 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task dhcpcd:3150 is blocked on a mutex likely owned by task kworker/u8:3:83. task:kworker/u8:3 state:D stack:0 pid:83 tgid:83 ppid:2 task_flags:0x4288060 flags:0x00000008 Workqueue: netns cleanup_net Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 devtmpfs_submit_req+0xac/0x114 drivers/base/devtmpfs.c:122 devtmpfs_delete_node+0xd8/0x128 drivers/base/devtmpfs.c:171 device_del+0x59c/0x7b4 drivers/base/core.c:3834 device_unregister+0x20/0xbc drivers/base/core.c:3896 device_destroy+0x94/0xcc drivers/base/core.c:4450 macvtap_device_event+0x21c/0x330 drivers/net/macvtap.c:193 notifier_call_chain+0x11c/0x49c kernel/notifier.c:85 raw_notifier_call_chain+0x18/0x24 kernel/notifier.c:453 call_netdevice_notifiers_info+0x88/0xe8 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xac0/0x1be8 net/core/dev.c:11982 unregister_netdevice_many net/core/dev.c:12046 [inline] default_device_exit_batch+0x614/0x88c net/core/dev.c:12538 ops_exit_list+0xf0/0x140 net/core/net_namespace.c:177 cleanup_net+0x438/0x93c net/core/net_namespace.c:654 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task kworker/0:3:3377 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:0 pid:3377 tgid:3377 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: infiniband ib_cache_event_task Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:746 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:798 rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 ib_get_eth_speed+0xdc/0x908 drivers/infiniband/core/verbs.c:1995 siw_query_port+0x44/0x378 drivers/infiniband/sw/siw/siw_verbs.c:179 iw_query_port drivers/infiniband/core/device.c:2098 [inline] ib_query_port drivers/infiniband/core/device.c:2139 [inline] ib_query_port+0x290/0x5f4 drivers/infiniband/core/device.c:2131 ib_cache_update.part.0+0xd4/0x998 drivers/infiniband/core/cache.c:1459 ib_cache_update drivers/infiniband/core/cache.c:1539 [inline] ib_cache_event_task+0x138/0x1f4 drivers/infiniband/core/cache.c:1539 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task kworker/0:3:3377 is blocked on a mutex likely owned by task kworker/u8:3:83. task:kworker/u8:3 state:D stack:0 pid:83 tgid:83 ppid:2 task_flags:0x4288060 flags:0x00000008 Workqueue: netns cleanup_net Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 devtmpfs_submit_req+0xac/0x114 drivers/base/devtmpfs.c:122 devtmpfs_delete_node+0xd8/0x128 drivers/base/devtmpfs.c:171 device_del+0x59c/0x7b4 drivers/base/core.c:3834 device_unregister+0x20/0xbc drivers/base/core.c:3896 device_destroy+0x94/0xcc drivers/base/core.c:4450 macvtap_device_event+0x21c/0x330 drivers/net/macvtap.c:193 notifier_call_chain+0x11c/0x49c kernel/notifier.c:85 raw_notifier_call_chain+0x18/0x24 kernel/notifier.c:453 call_netdevice_notifiers_info+0x88/0xe8 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xac0/0x1be8 net/core/dev.c:11982 unregister_netdevice_many net/core/dev.c:12046 [inline] default_device_exit_batch+0x614/0x88c net/core/dev.c:12538 ops_exit_list+0xf0/0x140 net/core/net_namespace.c:177 cleanup_net+0x438/0x93c net/core/net_namespace.c:654 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task kworker/0:0:5459 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:0 pid:5459 tgid:5459 ppid:2 task_flags:0x4288060 flags:0x00000008 Workqueue: md_misc mddev_delayed_delete Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 devtmpfs_submit_req+0xac/0x114 drivers/base/devtmpfs.c:122 devtmpfs_delete_node+0xd8/0x128 drivers/base/devtmpfs.c:171 device_del+0x59c/0x7b4 drivers/base/core.c:3834 del_gendisk+0x3fc/0x87c block/genhd.c:734 md_kobj_release+0x84/0xd8 drivers/md/md.c:5749 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x17c/0x430 lib/kobject.c:737 mddev_delayed_delete+0x14/0x20 drivers/md/md.c:5828 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task syz-executor:7017 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:7017 tgid:7017 ppid:1 task_flags:0x400140 flags:0x00000001 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 rwsem_down_read_slowpath+0x404/0x808 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x14c/0x314 kernel/locking/rwsem.c:1526 inode_lock_shared include/linux/fs.h:877 [inline] open_last_lookups fs/namei.c:3799 [inline] path_openat+0xfa8/0x25e4 fs/namei.c:4036 do_filp_open+0x184/0x360 fs/namei.c:4066 do_sys_openat2+0xe0/0x160 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __arm64_sys_openat+0x12c/0x1bc fs/open.c:1455 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x10c/0x138 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task kworker/u8:8:7257 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:8 state:D stack:0 pid:7257 tgid:7257 ppid:2 task_flags:0x4208060 flags:0x00000008 Workqueue: events_unbound linkwatch_event Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:746 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:798 rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 linkwatch_event+0x64/0xbc net/core/link_watch.c:303 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task kworker/u8:8:7257 is blocked on a mutex likely owned by task kworker/u8:3:83. task:kworker/u8:3 state:D stack:0 pid:83 tgid:83 ppid:2 task_flags:0x4288060 flags:0x00000008 Workqueue: netns cleanup_net Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 devtmpfs_submit_req+0xac/0x114 drivers/base/devtmpfs.c:122 devtmpfs_delete_node+0xd8/0x128 drivers/base/devtmpfs.c:171 device_del+0x59c/0x7b4 drivers/base/core.c:3834 device_unregister+0x20/0xbc drivers/base/core.c:3896 device_destroy+0x94/0xcc drivers/base/core.c:4450 macvtap_device_event+0x21c/0x330 drivers/net/macvtap.c:193 notifier_call_chain+0x11c/0x49c kernel/notifier.c:85 raw_notifier_call_chain+0x18/0x24 kernel/notifier.c:453 call_netdevice_notifiers_info+0x88/0xe8 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xac0/0x1be8 net/core/dev.c:11982 unregister_netdevice_many net/core/dev.c:12046 [inline] default_device_exit_batch+0x614/0x88c net/core/dev.c:12538 ops_exit_list+0xf0/0x140 net/core/net_namespace.c:177 cleanup_net+0x438/0x93c net/core/net_namespace.c:654 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 INFO: task syz-executor:8119 blocked for more than 430 seconds. Not tainted 6.15.0-rc2-syzkaller-00471-g119009db2674 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:0 pid:8119 tgid:8119 ppid:8118 task_flags:0x400140 flags:0x00000000 Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x5d8/0x9d8 kernel/locking/mutex.c:746 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:798 rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 rtnl_net_lock include/linux/rtnetlink.h:130 [inline] inet6_rtm_newaddr+0x36c/0x14c4 net/ipv6/addrconf.c:5028 rtnetlink_rcv_msg+0x65c/0x8d4 net/core/rtnetlink.c:6955 netlink_rcv_skb+0x1ac/0x34c net/netlink/af_netlink.c:2534 rtnetlink_rcv+0x18/0x24 net/core/rtnetlink.c:6982 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x3c0/0x670 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x658/0xa50 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0xc8/0x168 net/socket.c:727 __sys_sendto+0x1d8/0x26c net/socket.c:2180 __do_sys_sendto net/socket.c:2187 [inline] __se_sys_sendto net/socket.c:2183 [inline] __arm64_sys_sendto+0xc0/0x134 net/socket.c:2183 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x10c/0x138 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz-executor:8119 is blocked on a mutex likely owned by task kworker/u8:3:83. task:kworker/u8:3 state:D stack:0 pid:83 tgid:83 ppid:2 task_flags:0x4288060 flags:0x00000008 Workqueue: netns cleanup_net Call trace: __switch_to+0x204/0x4bc arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0xd34/0x3188 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xd0/0x344 kernel/sched/core.c:6860 schedule_timeout+0x1ec/0x224 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x1d0/0x3f8 kernel/sched/completion.c:116 wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x20/0x2c kernel/sched/completion.c:148 devtmpfs_submit_req+0xac/0x114 drivers/base/devtmpfs.c:122 devtmpfs_delete_node+0xd8/0x128 drivers/base/devtmpfs.c:171 device_del+0x59c/0x7b4 drivers/base/core.c:3834 device_unregister+0x20/0xbc drivers/base/core.c:3896 device_destroy+0x94/0xcc drivers/base/core.c:4450 macvtap_device_event+0x21c/0x330 drivers/net/macvtap.c:193 notifier_call_chain+0x11c/0x49c kernel/notifier.c:85 raw_notifier_call_chain+0x18/0x24 kernel/notifier.c:453 call_netdevice_notifiers_info+0x88/0xe8 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xac0/0x1be8 net/core/dev.c:11982 unregister_netdevice_many net/core/dev.c:12046 [inline] default_device_exit_batch+0x614/0x88c net/core/dev.c:12538 ops_exit_list+0xf0/0x140 net/core/net_namespace.c:177 cleanup_net+0x438/0x93c net/core/net_namespace.c:654 process_one_work+0x7cc/0x18d4 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x734/0xb84 kernel/workqueue.c:3400 kthread+0x348/0x5fc kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Showing all locks held in the system: 2 locks held by kdevtmpfs/25: #0: ffff00000de30950 (&type->i_mutex_dir_key/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:902 [inline] #0: ffff00000de30950 (&type->i_mutex_dir_key/1){+.+.}-{4:4}, at: __kern_path_locked+0xd4/0x1f8 fs/namei.c:2765 #1: ffff80008771a4e8 (major_names_lock){+.+.}-{4:4}, at: blk_probe_dev+0x30/0x168 block/genhd.c:820 2 locks held by pr/ttyAMA0/32: 1 lock held by khungtaskd/33: #0: ffff80008728da60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6758 3 locks held by kworker/u8:2/36: #0: ffff000017c64948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff80008d957c80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 4 locks held by kworker/u8:3/83: #0: ffff00000dd62948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff80008db27c80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff8000887cf0f0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xd4/0x93c net/core/net_namespace.c:608 #3: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 2 locks held by kworker/u8:7/1465: 2 locks held by syslogd/3106: 1 lock held by klogd/3110: 2 locks held by dhcpcd/3150: #0: ffff8000887baa88 (vlan_ioctl_mutex){+.+.}-{4:4}, at: sock_ioctl+0x418/0x5d4 net/socket.c:1273 #1: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 2 locks held by getty/3241: #0: ffff0000169df0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80008d50b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e4/0xdb4 drivers/tty/n_tty.c:2222 1 lock held by syz-executor/3295: 3 locks held by kworker/0:3/3377: #0: ffff00000f41e948 ((wq_completion)infiniband){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff8000a19c7c80 ((work_completion)(&work->work)#2){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 2 locks held by kworker/0:0/5459: #0: ffff00000ef87148 ((wq_completion)md_misc){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff80008dee7c80 ((work_completion)(&mddev->del_work)){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 2 locks held by syz-executor/7017: #0: ffff00000de52420 (sb_writers){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1783 [inline] #0: ffff00000de52420 (sb_writers){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1919 [inline] #0: ffff00000de52420 (sb_writers){.+.+}-{0:0}, at: mnt_want_write+0x3c/0xb0 fs/namespace.c:556 #1: ffff00000de30950 (&type->i_mutex_dir_key#2){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline] #1: ffff00000de30950 (&type->i_mutex_dir_key#2){++++}-{4:4}, at: open_last_lookups fs/namei.c:3799 [inline] #1: ffff00000de30950 (&type->i_mutex_dir_key#2){++++}-{4:4}, at: path_openat+0xfa8/0x25e4 fs/namei.c:4036 3 locks held by kworker/u8:8/7257: #0: ffff00000d831148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x6f8/0x18d4 kernel/workqueue.c:3213 #1: ffff8000a2067c80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x71c/0x18d4 kernel/workqueue.c:3213 #2: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 1 lock held by syz-executor/8119: #0: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 1 lock held by syz-executor/8157: #0: ffff8000887e3b68 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x1c/0x28 net/core/rtnetlink.c:80 1 lock held by kworker/1:0/8162: #0: ffff00006a0dcfd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:605 [inline] #0: ffff00006a0dcfd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1513 [inline] #0: ffff00006a0dcfd8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1837 [inline] #0: ffff00006a0dcfd8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x318/0x3188 kernel/sched/core.c:6691 =============================================