INFO: task kworker/1:4:5143 blocked for more than 143 seconds. Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:21712 pid:5143 tgid:5143 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 linkwatch_event+0xe/0x60 net/core/link_watch.c:276 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz-executor:13836 blocked for more than 144 seconds. Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21024 pid:13836 tgid:13836 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 tun_detach drivers/net/tun.c:698 [inline] tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500 __fput+0x24a/0x8a0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa27/0x27e0 kernel/exit.c:874 do_group_exit+0x207/0x2c0 kernel/exit.c:1023 get_signal+0x16a1/0x1740 kernel/signal.c:2909 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x360 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f79f477796c RSP: 002b:00007f79f4a2f670 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: 000000000000004c RBX: 00007f79f5434620 RCX: 00007f79f477796c RDX: 000000000000004c RSI: 00007f79f5434670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f79f4a2f6c4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f79f5434670 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by kworker/0:0/8: 1 lock held by kworker/R-mm_pe/13: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by khungtaskd/30: #0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] , at: rcu_read_lock include/linux/rcupdate.h:781 [inline] , at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 5 locks held by kworker/u8:2/35: 3 locks held by kworker/1:1/45: #0: ffff888015080948 ( (wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] (wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc90000b57d00 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc90000b57d00 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f917fc8 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:108 [inline] #2: ffffffff8f917fc8 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x2f/0xe0 net/openvswitch/datapath.c:2527 4 locks held by kworker/0:2/1146: 7 locks held by kworker/u8:6/3078: #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc9000a6b7d00 ( net_cleanup_work ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3224 [inline] , at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffff888065bb20e8 ( &dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:1009 [inline] , at: devl_dev_lock net/devlink/devl_internal.h:108 [inline] , at: devlink_pernet_pre_exit+0x13b/0x440 net/devlink/core.c:506 #4: ffff8880610a6250 (&devlink->lock_key#68){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline] (&devlink->lock_key#68){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline] (&devlink->lock_key#68){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x14d/0x440 net/devlink/core.c:506 #5: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3} , at: nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773 #6: ffffffff8e1ce5b0 ( cpu_hotplug_lock ){++++}-{0:0} , at: flush_all_backlogs net/core/dev.c:5984 [inline] , at: unregister_netdevice_many_notify+0x607/0x16b0 net/core/dev.c:11201 4 locks held by udevd/4543: #0: ffff8880798491c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182 #1: ffff8880610b8088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154 #2: ffff88807978b008 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155 #3: ffff888025840190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] ffff888025840190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2743 2 locks held by dhcpcd/4756: #0: ffffffff8f5cc008 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x664/0x8e0 net/socket.c:1303 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0x112/0x9d0 net/8021q/vlan.c:553 2 locks held by getty/4849: #0: ffff88802a9720a0 ( &tty->ldisc_sem ){++++}-{0:0} , at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031432f0 ( &ldata->atomic_read_lock ){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:4/5143: #0: ffff888015080948 ((wq_completion)events ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3223 [inline] , at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc900044f7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] ffffc900044f7d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 1 lock held by kworker/0:5/5144: #0: ffffffff8e1deb68 ( wq_pool_attach_mutex ){+.+.}-{3:3} , at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 2 locks held by kworker/0:6/5145: 6 locks held by kworker/0:7/5146: 8 locks held by kworker/0:8/5147: 3 locks held by kworker/1:5/5167: #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc900046e7d00 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc900046e7d00 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f917fc8 ( ovs_mutex ){+.+.}-{3:3} , at: ovs_lock net/openvswitch/datapath.c:108 [inline] , at: ovs_dp_masks_rebalance+0x2f/0xe0 net/openvswitch/datapath.c:2527 3 locks held by kworker/1:6/5202: #0: ffff888015080948 ( (wq_completion)events ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3223 [inline] , at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc90004a67d00 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc90004a67d00 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f917fc8 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:108 [inline] #2: ffffffff8f917fc8 (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x2f/0xe0 net/openvswitch/datapath.c:2527 3 locks held by kworker/1:7/5205: #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc90004a87d00 ( deferred_process_work ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3224 [inline] , at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 5 locks held by kworker/u8:8/6947: 1 lock held by kworker/R-wg-cr/8576: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/8584: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/8585: #0: ffffffff8e1deb68 ( wq_pool_attach_mutex ){+.+.}-{3:3} , at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/8586: 1 lock held by kworker/R-wg-cr/8589: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/8596: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 3 locks held by kworker/1:0/12196: #0: ffff888015080948 ( (wq_completion)events ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3223 [inline] , at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc90004fa7d00 ( (work_completion)(&(&ovs_net->masks_rebalance)->work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3224 [inline] , at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f917fc8 (ovs_mutex){+.+.}-{3:3}, at: ovs_lock net/openvswitch/datapath.c:108 [inline] (ovs_mutex){+.+.}-{3:3}, at: ovs_dp_masks_rebalance+0x2f/0xe0 net/openvswitch/datapath.c:2527 3 locks held by kworker/u8:9/12383: #0: ffff888029fc8148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] ffff888029fc8148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc9000347fd00 ((work_completion)(&(&ifa->dad_work)->work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:3224 [inline] , at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3} , at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 1 lock held by kworker/R-wg-cr/13074: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13079: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13082: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3} , at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13528: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13529: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13530: #0: ffffffff8e1deb68 ( wq_pool_attach_mutex){+.+.}-{3:3} , at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13558: #0: ffffffff8e1deb68 ( wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13561: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13568: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13614: #0: ffffffff8e1deb68 ( wq_pool_attach_mutex ){+.+.}-{3:3} , at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13616: #0: ffffffff8e1deb68 ( wq_pool_attach_mutex){+.+.}-{3:3} , at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by kworker/R-wg-cr/13617: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3} , at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 1 lock held by syz-executor/13836: #0: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500 2 locks held by syz-executor/13992: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:414 2 locks held by syz-executor/13994: #0: ffffffff8f5da690 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3} , at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:414 2 locks held by syz-executor/14027: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:414 2 locks held by syz-executor/14030: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3} , at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/14034: #0: ffffffff8f5da690 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/14048: #0: ffffffff8f5da690 (pernet_ops_rwsem){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/14050: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/14052: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/14054: #0: ffffffff8f5da690 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3} , at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/14056: #0: ffffffff8f5da690 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/14059: #0: ffffffff8f5da690 (pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 2 locks held by syz-executor/14063: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 2 locks held by syz-executor/14067: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 2 locks held by syz-executor/14070: #0: ffffffff8f5da690 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 2 locks held by syz-executor/14071: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 1 lock held by kworker/1:2/14072: #0: ffffffff8e1deb68 (wq_pool_attach_mutex){+.+.}-{3:3}, at: worker_attach_to_pool+0x31/0x390 kernel/workqueue.c:2690 2 locks held by syz-executor/14077: #0: ffffffff8f5da690 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 ( rtnl_mutex ){+.+.}-{3:3} , at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 2 locks held by syz-executor/14080: #0: ffffffff8f5da690 ( pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 2 locks held by syz-executor/14085: #0: ffffffff8f5da690 ( pernet_ops_rwsem ){++++}-{3:3} , at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504 #1: ffffffff8f5e6ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871 2 locks held by syz-executor/14088: #0: ffffffff8f5da690 ( pernet_ops_rwsem