[ 18.170313][ T355] 8021q: 802.1Q VLAN Support v1.8 [ 18.611167][ T361] gre: GRE over IPv4 demultiplexor driver [ 18.656602][ T361] ip6_gre: GRE over IPv6 tunneling driver [ 28.829309][ T444] GACT probability NOT on [ 46.320854][ T657] [ 46.321026][ T657] ============================================ [ 46.321225][ T657] WARNING: possible recursive locking detected [ 46.321425][ T657] 6.13.0-rc5-virtme #1 Not tainted [ 46.321590][ T657] -------------------------------------------- [ 46.321795][ T657] ip/657 is trying to acquire lock: [ 46.321956][ T657] ffffffff8c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.322288][ T657] [ 46.322288][ T657] but task is already holding lock: [ 46.322527][ T657] ffffffff8c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.322947][ T657] [ 46.322947][ T657] other info that might help us debug this: [ 46.323190][ T657] Possible unsafe locking scenario: [ 46.323190][ T657] [ 46.323419][ T657] CPU0 [ 46.323536][ T657] ---- [ 46.323648][ T657] lock((netdev_chain).rwsem); [ 46.323811][ T657] lock((netdev_chain).rwsem); [ 46.323965][ T657] [ 46.323965][ T657] *** DEADLOCK *** [ 46.323965][ T657] [ 46.324190][ T657] May be due to missing lock nesting notation [ 46.324190][ T657] [ 46.324411][ T657] 2 locks held by ip/657: [ 46.324529][ T657] #0: ffffffff8c5e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 46.324811][ T657] #1: ffffffff8c5d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.325110][ T657] [ 46.325110][ T657] stack backtrace: [ 46.325296][ T657] CPU: 3 UID: 0 PID: 657 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 46.325519][ T657] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 46.325707][ T657] Call Trace: [ 46.325820][ T657] [ 46.325897][ T657] dump_stack_lvl+0x82/0xd0 [ 46.326055][ T657] print_deadlock_bug+0x40a/0x650 [ 46.326203][ T657] validate_chain+0x5bf/0xae0 [ 46.326356][ T657] ? __pfx_validate_chain+0x10/0x10 [ 46.326504][ T657] ? hlock_class+0x4e/0x130 [ 46.326653][ T657] ? mark_lock+0x38/0x3e0 [ 46.326770][ T657] __lock_acquire+0xb9a/0x1680 [ 46.326921][ T657] lock_acquire.part.0+0xeb/0x330 [ 46.327071][ T657] ? blocking_notifier_call_chain+0x50/0x90 [ 46.327256][ T657] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 46.327450][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.327599][ T657] ? trace_lock_acquire+0x14c/0x1f0 [ 46.327751][ T657] ? lock_acquire+0x32/0xc0 [ 46.327901][ T657] ? blocking_notifier_call_chain+0x50/0x90 [ 46.328089][ T657] down_read+0x9f/0x340 [ 46.328202][ T657] ? blocking_notifier_call_chain+0x50/0x90 [ 46.328389][ T657] ? __pfx_down_read+0x10/0x10 [ 46.328549][ T657] ? __lock_release+0x103/0x460 [ 46.328700][ T657] ? netconsole_netdev_event+0x2c1/0x620 [ 46.328849][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.328999][ T657] blocking_notifier_call_chain+0x50/0x90 [ 46.329149][ T657] __netdev_upper_dev_unlink+0xd9/0x220 [ 46.329299][ T657] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 46.329484][ T657] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 46.329639][ T657] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 46.329822][ T657] ? rtnl_is_locked+0x15/0x20 [ 46.329974][ T657] netdev_upper_dev_unlink+0x71/0xa0 [ 46.330121][ T657] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 46.330306][ T657] ? netconsole_netdev_event+0x2c1/0x620 [ 46.330454][ T657] ? mutex_is_locked+0x1c/0x60 [ 46.330601][ T657] ? rtnl_is_locked+0x15/0x20 [ 46.330757][ T657] ? netdev_master_upper_dev_get+0x13/0x120 [ 46.330940][ T657] vrf_device_event+0x78/0xe0 [vrf] [ 46.331090][ T657] notifier_call_chain+0xcd/0x150 [ 46.331241][ T657] blocking_notifier_call_chain+0x66/0x90 [ 46.331409][ T657] unregister_netdevice_many_notify+0xa7b/0x1580 [ 46.331594][ T657] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 46.331785][ T657] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 46.331938][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.332087][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.332236][ T657] ? rtnl_is_locked+0x15/0x20 [ 46.332384][ T657] ? unregister_netdevice_queue+0x70/0x410 [ 46.332564][ T657] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 46.332747][ T657] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 46.332912][ T657] rtnl_dellink+0x348/0xa40 [ 46.333062][ T657] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.333224][ T657] ? find_held_lock+0x2c/0x110 [ 46.333372][ T657] ? __lock_release+0x103/0x460 [ 46.333519][ T657] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.333668][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.333815][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.333969][ T657] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.334115][ T657] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.334263][ T657] rtnetlink_rcv_msg+0x712/0xc10 [ 46.334412][ T657] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.334559][ T657] ? hlock_class+0x4e/0x130 [ 46.334708][ T657] ? mark_lock+0x38/0x3e0 [ 46.334820][ T657] ? __lock_acquire+0xb9a/0x1680 [ 46.334972][ T657] netlink_rcv_skb+0x130/0x360 [ 46.335118][ T657] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.335266][ T657] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 46.335415][ T657] ? netlink_deliver_tap+0x13e/0x340 [ 46.335563][ T657] ? netlink_deliver_tap+0xc3/0x340 [ 46.335711][ T657] netlink_unicast+0x44b/0x710 [ 46.335858][ T657] ? __pfx_netlink_unicast+0x10/0x10 [ 46.336009][ T657] ? find_held_lock+0x2c/0x110 [ 46.336160][ T657] netlink_sendmsg+0x723/0xbe0 [ 46.336308][ T657] ? __pfx_netlink_sendmsg+0x10/0x10 [ 46.336456][ T657] ____sys_sendmsg+0x7ac/0xa10 [ 46.336604][ T657] ? __pfx_____sys_sendmsg+0x10/0x10 [ 46.336752][ T657] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 46.336938][ T657] ___sys_sendmsg+0xee/0x170 [ 46.337101][ T657] ? __pfx____sys_sendmsg+0x10/0x10 [ 46.337249][ T657] ? kasan_save_stack+0x34/0x50 [ 46.337398][ T657] ? kasan_save_stack+0x24/0x50 [ 46.337544][ T657] ? __kasan_record_aux_stack+0x8e/0xa0 [ 46.337693][ T657] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 46.337877][ T657] ? __x64_sys_close+0x7c/0xd0 [ 46.338026][ T657] ? do_syscall_64+0xc1/0x1d0 [ 46.338173][ T657] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.338361][ T657] ? __lock_acquire+0xb9a/0x1680 [ 46.338511][ T657] ? find_held_lock+0x2c/0x110 [ 46.338663][ T657] ? __lock_release+0x103/0x460 [ 46.338809][ T657] ? __virt_addr_valid+0x22b/0x430 [ 46.338960][ T657] ? __pfx___lock_release+0x10/0x10 [ 46.339122][ T657] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.339272][ T657] __sys_sendmsg+0x109/0x1a0 [ 46.339429][ T657] ? __pfx___sys_sendmsg+0x10/0x10 [ 46.339578][ T657] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 46.339768][ T657] do_syscall_64+0xc1/0x1d0 [ 46.339916][ T657] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.340099][ T657] RIP: 0033:0x7fd5614169a7 [ 46.340253][ T657] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 46.340773][ T657] RSP: 002b:00007ffca3a13288 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.340995][ T657] RAX: ffffffffffffffda RBX: 00007ffca3a139b0 RCX: 00007fd5614169a7 [ 46.341213][ T657] RDX: 0000000000000000 RSI: 00007ffca3a132f0 RDI: 0000000000000005 [ 46.341434][ T657] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 46.341654][ T657] R10: 00007fd5612d4ef8 R11: 0000000000000246 R12: 0000000000000002 [ 46.341874][ T657] R13: 0000000067792b5d R14: 0000000000498600 R15: 0000000000000000 [ 46.342098][ T657]