[ 11.777290][ T249] ip (249) used greatest stack depth: 23984 bytes left [ 15.550077][ T309] 8021q: 802.1Q VLAN Support v1.8 [ 16.368920][ T320] gre: GRE over IPv4 demultiplexor driver [ 16.386361][ T320] ip_gre: GRE over IPv4 tunneling driver [ 21.608431][ T386] GACT probability NOT on [ 88.490849][ T680] [ 88.491010][ T680] ============================================ [ 88.491208][ T680] WARNING: possible recursive locking detected [ 88.491409][ T680] 6.13.0-rc5-virtme #1 Not tainted [ 88.491561][ T680] -------------------------------------------- [ 88.491748][ T680] ip/680 is trying to acquire lock: [ 88.491925][ T680] ffffffff961d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 88.492239][ T680] [ 88.492239][ T680] but task is already holding lock: [ 88.492459][ T680] ffffffff961d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 88.492752][ T680] [ 88.492752][ T680] other info that might help us debug this: [ 88.492972][ T680] Possible unsafe locking scenario: [ 88.492972][ T680] [ 88.493193][ T680] CPU0 [ 88.493313][ T680] ---- [ 88.493426][ T680] lock((netdev_chain).rwsem); [ 88.493574][ T680] lock((netdev_chain).rwsem); [ 88.493727][ T680] [ 88.493727][ T680] *** DEADLOCK *** [ 88.493727][ T680] [ 88.493953][ T680] May be due to missing lock nesting notation [ 88.493953][ T680] [ 88.494168][ T680] 2 locks held by ip/680: [ 88.494288][ T680] #0: ffffffff961e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 88.494558][ T680] #1: ffffffff961d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 88.494858][ T680] [ 88.494858][ T680] stack backtrace: [ 88.495038][ T680] CPU: 2 UID: 0 PID: 680 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 88.495258][ T680] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 88.495449][ T680] Call Trace: [ 88.495565][ T680] [ 88.495642][ T680] dump_stack_lvl+0x82/0xd0 [ 88.495794][ T680] print_deadlock_bug+0x40a/0x650 [ 88.495948][ T680] validate_chain+0x5bf/0xae0 [ 88.496097][ T680] ? __pfx_validate_chain+0x10/0x10 [ 88.496246][ T680] ? hlock_class+0x4e/0x130 [ 88.496391][ T680] ? mark_lock+0x38/0x3e0 [ 88.496511][ T680] __lock_acquire+0xb9a/0x1680 [ 88.496662][ T680] lock_acquire.part.0+0xeb/0x330 [ 88.496811][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 88.496996][ T680] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 88.497204][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 88.497349][ T680] ? trace_lock_acquire+0x14c/0x1f0 [ 88.497495][ T680] ? lock_acquire+0x32/0xc0 [ 88.497647][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 88.497830][ T680] down_read+0x9f/0x340 [ 88.497942][ T680] ? blocking_notifier_call_chain+0x50/0x90 [ 88.498127][ T680] ? __pfx_down_read+0x10/0x10 [ 88.498274][ T680] ? __lock_release+0x103/0x460 [ 88.498420][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 88.498565][ T680] ? __pfx___lock_release+0x10/0x10 [ 88.498760][ T680] blocking_notifier_call_chain+0x50/0x90 [ 88.498919][ T680] __netdev_upper_dev_unlink+0xd9/0x220 [ 88.499087][ T680] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 88.499270][ T680] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 88.499416][ T680] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 88.499600][ T680] ? rtnl_is_locked+0x15/0x20 [ 88.499757][ T680] netdev_upper_dev_unlink+0x71/0xa0 [ 88.499903][ T680] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 88.500083][ T680] ? netconsole_netdev_event+0x2c1/0x620 [ 88.500232][ T680] ? mutex_is_locked+0x1c/0x60 [ 88.500381][ T680] ? rtnl_is_locked+0x15/0x20 [ 88.500527][ T680] ? netdev_master_upper_dev_get+0x13/0x120 [ 88.500708][ T680] vrf_device_event+0x78/0xe0 [vrf] [ 88.500866][ T680] notifier_call_chain+0xcd/0x150 [ 88.501014][ T680] blocking_notifier_call_chain+0x66/0x90 [ 88.501160][ T680] unregister_netdevice_many_notify+0xa7b/0x1580 [ 88.501343][ T680] ? hlock_class+0x4e/0x130 [ 88.501489][ T680] ? mark_lock+0x38/0x3e0 [ 88.501602][ T680] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 88.501784][ T680] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 88.501977][ T680] ? kfree+0xf3/0x330 [ 88.502091][ T680] ? vlan_vid_del+0x310/0x5e0 [ 88.502240][ T680] ? vlan_vid_del+0x310/0x5e0 [ 88.502388][ T680] rtnl_dellink+0x348/0xa40 [ 88.502548][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 88.502709][ T680] ? find_held_lock+0x2c/0x110 [ 88.502859][ T680] ? __lock_release+0x103/0x460 [ 88.503007][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 88.503158][ T680] ? __pfx___lock_release+0x10/0x10 [ 88.503306][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 88.503455][ T680] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 88.503619][ T680] ? __pfx_rtnl_dellink+0x10/0x10 [ 88.503774][ T680] rtnetlink_rcv_msg+0x712/0xc10 [ 88.503920][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 88.504068][ T680] ? hlock_class+0x4e/0x130 [ 88.504221][ T680] ? mark_lock+0x38/0x3e0 [ 88.504345][ T680] ? __lock_acquire+0xb9a/0x1680 [ 88.504501][ T680] netlink_rcv_skb+0x130/0x360 [ 88.504681][ T680] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 88.504831][ T680] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 88.504981][ T680] ? netlink_deliver_tap+0x13e/0x340 [ 88.505138][ T680] ? netlink_deliver_tap+0xc3/0x340 [ 88.505299][ T680] netlink_unicast+0x44b/0x710 [ 88.505456][ T680] ? __pfx_netlink_unicast+0x10/0x10 [ 88.505611][ T680] ? find_held_lock+0x2c/0x110 [ 88.505764][ T680] netlink_sendmsg+0x723/0xbe0 [ 88.505909][ T680] ? __pfx_netlink_sendmsg+0x10/0x10 [ 88.506065][ T680] ____sys_sendmsg+0x7ac/0xa10 [ 88.506218][ T680] ? __pfx_____sys_sendmsg+0x10/0x10 [ 88.506398][ T680] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 88.506600][ T680] ___sys_sendmsg+0xee/0x170 [ 88.506744][ T680] ? __pfx____sys_sendmsg+0x10/0x10 [ 88.506893][ T680] ? kasan_save_stack+0x34/0x50 [ 88.507073][ T680] ? kasan_save_stack+0x24/0x50 [ 88.507218][ T680] ? __kasan_record_aux_stack+0x8e/0xa0 [ 88.507365][ T680] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 88.507557][ T680] ? __x64_sys_close+0x7c/0xd0 [ 88.507703][ T680] ? do_syscall_64+0xc1/0x1d0 [ 88.507849][ T680] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.508033][ T680] ? __lock_acquire+0xb9a/0x1680 [ 88.508187][ T680] ? find_held_lock+0x2c/0x110 [ 88.508334][ T680] ? __lock_release+0x103/0x460 [ 88.508481][ T680] ? __virt_addr_valid+0x22b/0x430 [ 88.508631][ T680] ? __pfx___lock_release+0x10/0x10 [ 88.508827][ T680] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 88.509041][ T680] __sys_sendmsg+0x109/0x1a0 [ 88.509269][ T680] ? __pfx___sys_sendmsg+0x10/0x10 [ 88.509467][ T680] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 88.509792][ T680] do_syscall_64+0xc1/0x1d0 [ 88.510025][ T680] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.510306][ T680] RIP: 0033:0x7fb2b3b6f9a7 [ 88.510540][ T680] 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 [ 88.511381][ T680] RSP: 002b:00007ffc8cc90e78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 88.511731][ T680] RAX: ffffffffffffffda RBX: 00007ffc8cc915a0 RCX: 00007fb2b3b6f9a7 [ 88.512086][ T680] RDX: 0000000000000000 RSI: 00007ffc8cc90ee0 RDI: 0000000000000005 [ 88.512450][ T680] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 88.512810][ T680] R10: 00007fb2b3a2def8 R11: 0000000000000246 R12: 0000000000000002 [ 88.513177][ T680] R13: 0000000067795326 R14: 0000000000498600 R15: 0000000000000000 [ 88.513556][ T680] [ 88.540344][ T680] ip (680) used greatest stack depth: 23832 bytes left