[ 11.026675][ T250] ip (250) used greatest stack depth: 23136 bytes left [ 19.104532][ T306] GACT probability NOT on [ 36.765459][ T704] 8021q: 802.1Q VLAN Support v1.8 [ 38.332062][ T727] [ 38.332231][ T727] ============================================ [ 38.332432][ T727] WARNING: possible recursive locking detected [ 38.332616][ T727] 6.13.0-rc5-virtme #1 Not tainted [ 38.332763][ T727] -------------------------------------------- [ 38.332958][ T727] ip/727 is trying to acquire lock: [ 38.333108][ T727] ffffffffae7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 38.333415][ T727] [ 38.333415][ T727] but task is already holding lock: [ 38.333631][ T727] ffffffffae7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 38.333925][ T727] [ 38.333925][ T727] other info that might help us debug this: [ 38.334152][ T727] Possible unsafe locking scenario: [ 38.334152][ T727] [ 38.334370][ T727] CPU0 [ 38.334482][ T727] ---- [ 38.334595][ T727] lock((netdev_chain).rwsem); [ 38.334745][ T727] lock((netdev_chain).rwsem); [ 38.334895][ T727] [ 38.334895][ T727] *** DEADLOCK *** [ 38.334895][ T727] [ 38.335112][ T727] May be due to missing lock nesting notation [ 38.335112][ T727] [ 38.335330][ T727] 2 locks held by ip/727: [ 38.335445][ T727] #0: ffffffffae7e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 38.335717][ T727] #1: ffffffffae7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 38.336020][ T727] [ 38.336020][ T727] stack backtrace: [ 38.336202][ T727] CPU: 3 UID: 0 PID: 727 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 38.336429][ T727] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 38.336614][ T727] Call Trace: [ 38.336726][ T727] [ 38.336803][ T727] dump_stack_lvl+0x82/0xd0 [ 38.336963][ T727] print_deadlock_bug+0x40a/0x650 [ 38.337113][ T727] validate_chain+0x5bf/0xae0 [ 38.337264][ T727] ? __pfx_validate_chain+0x10/0x10 [ 38.337418][ T727] ? hlock_class+0x4e/0x130 [ 38.337565][ T727] ? mark_lock+0x38/0x3e0 [ 38.337677][ T727] __lock_acquire+0xb9a/0x1680 [ 38.337831][ T727] lock_acquire.part.0+0xeb/0x330 [ 38.337976][ T727] ? blocking_notifier_call_chain+0x50/0x90 [ 38.338158][ T727] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 38.338381][ T727] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 38.338529][ T727] ? trace_lock_acquire+0x14c/0x1f0 [ 38.338695][ T727] ? lock_acquire+0x32/0xc0 [ 38.338850][ T727] ? blocking_notifier_call_chain+0x50/0x90 [ 38.339035][ T727] down_read+0x9f/0x340 [ 38.339160][ T727] ? blocking_notifier_call_chain+0x50/0x90 [ 38.339344][ T727] ? __pfx_down_read+0x10/0x10 [ 38.339489][ T727] ? __lock_release+0x103/0x460 [ 38.339641][ T727] ? netconsole_netdev_event+0x2c1/0x620 [ 38.339803][ T727] ? __pfx___lock_release+0x10/0x10 [ 38.339960][ T727] blocking_notifier_call_chain+0x50/0x90 [ 38.340119][ T727] __netdev_upper_dev_unlink+0xd9/0x220 [ 38.340267][ T727] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 38.340450][ T727] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 38.340606][ T727] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 38.340810][ T727] ? rtnl_is_locked+0x15/0x20 [ 38.340959][ T727] netdev_upper_dev_unlink+0x71/0xa0 [ 38.341103][ T727] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 38.341281][ T727] ? netconsole_netdev_event+0x2c1/0x620 [ 38.341433][ T727] ? mutex_is_locked+0x1c/0x60 [ 38.341602][ T727] ? rtnl_is_locked+0x15/0x20 [ 38.341753][ T727] ? netdev_master_upper_dev_get+0x13/0x120 [ 38.341936][ T727] vrf_device_event+0x78/0xe0 [vrf] [ 38.342104][ T727] notifier_call_chain+0xcd/0x150 [ 38.342251][ T727] blocking_notifier_call_chain+0x66/0x90 [ 38.342397][ T727] unregister_netdevice_many_notify+0xa7b/0x1580 [ 38.342578][ T727] ? __lock_release+0x103/0x460 [ 38.342740][ T727] ? __pfx___lock_release+0x10/0x10 [ 38.342887][ T727] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 38.343068][ T727] ? hlock_class+0x4e/0x130 [ 38.343218][ T727] ? mark_held_locks+0x9e/0xe0 [ 38.343362][ T727] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 38.343511][ T727] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 38.343695][ T727] rtnl_dellink+0x348/0xa40 [ 38.343844][ T727] ? __pfx_rtnl_dellink+0x10/0x10 [ 38.344004][ T727] ? find_held_lock+0x2c/0x110 [ 38.344153][ T727] ? __lock_release+0x103/0x460 [ 38.344296][ T727] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 38.344444][ T727] ? __pfx___lock_release+0x10/0x10 [ 38.344590][ T727] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 38.344742][ T727] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 38.344885][ T727] ? __pfx_rtnl_dellink+0x10/0x10 [ 38.345031][ T727] rtnetlink_rcv_msg+0x712/0xc10 [ 38.345179][ T727] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 38.345326][ T727] ? hlock_class+0x4e/0x130 [ 38.345469][ T727] ? mark_lock+0x38/0x3e0 [ 38.345582][ T727] ? __lock_acquire+0xb9a/0x1680 [ 38.345727][ T727] netlink_rcv_skb+0x130/0x360 [ 38.345872][ T727] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 38.346020][ T727] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 38.346180][ T727] ? netlink_deliver_tap+0x13e/0x340 [ 38.346327][ T727] ? netlink_deliver_tap+0xc3/0x340 [ 38.346473][ T727] netlink_unicast+0x44b/0x710 [ 38.346617][ T727] ? __pfx_netlink_unicast+0x10/0x10 [ 38.346765][ T727] ? find_held_lock+0x2c/0x110 [ 38.346915][ T727] netlink_sendmsg+0x723/0xbe0 [ 38.347062][ T727] ? __pfx_netlink_sendmsg+0x10/0x10 [ 38.347213][ T727] ____sys_sendmsg+0x7ac/0xa10 [ 38.347361][ T727] ? __pfx_____sys_sendmsg+0x10/0x10 [ 38.347507][ T727] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 38.347695][ T727] ___sys_sendmsg+0xee/0x170 [ 38.347840][ T727] ? __pfx____sys_sendmsg+0x10/0x10 [ 38.347987][ T727] ? kasan_save_stack+0x34/0x50 [ 38.348134][ T727] ? kasan_save_stack+0x24/0x50 [ 38.348277][ T727] ? __kasan_record_aux_stack+0x8e/0xa0 [ 38.348427][ T727] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 38.348611][ T727] ? __x64_sys_close+0x7c/0xd0 [ 38.348760][ T727] ? do_syscall_64+0xc1/0x1d0 [ 38.348912][ T727] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 38.349097][ T727] ? __lock_acquire+0xb9a/0x1680 [ 38.349245][ T727] ? find_held_lock+0x2c/0x110 [ 38.349390][ T727] ? __lock_release+0x103/0x460 [ 38.349539][ T727] ? __virt_addr_valid+0x22b/0x430 [ 38.349695][ T727] ? __pfx___lock_release+0x10/0x10 [ 38.349854][ T727] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 38.349999][ T727] __sys_sendmsg+0x109/0x1a0 [ 38.350144][ T727] ? __pfx___sys_sendmsg+0x10/0x10 [ 38.350291][ T727] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 38.350474][ T727] do_syscall_64+0xc1/0x1d0 [ 38.350622][ T727] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 38.350804][ T727] RIP: 0033:0x7f3e37caa9a7 [ 38.350961][ T727] 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 [ 38.351502][ T727] RSP: 002b:00007ffe92942ff8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 38.351732][ T727] RAX: ffffffffffffffda RBX: 00007ffe92943720 RCX: 00007f3e37caa9a7 [ 38.351948][ T727] RDX: 0000000000000000 RSI: 00007ffe92943060 RDI: 0000000000000005 [ 38.352175][ T727] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 38.352411][ T727] R10: 00007f3e37b68ef8 R11: 0000000000000246 R12: 0000000000000002 [ 38.352637][ T727] R13: 0000000067790362 R14: 0000000000498600 R15: 0000000000000000 [ 38.352879][ T727]