[ 10.700842][ T249] ip (249) used greatest stack depth: 24304 bytes left [ 17.187532][ T353] 8021q: 802.1Q VLAN Support v1.8 [ 17.626618][ T359] gre: GRE over IPv4 demultiplexor driver [ 17.674364][ T359] ip6_gre: GRE over IPv6 tunneling driver [ 27.546444][ T441] GACT probability NOT on [ 43.843132][ T654] [ 43.843336][ T654] ============================================ [ 43.843523][ T654] WARNING: possible recursive locking detected [ 43.843708][ T654] 6.13.0-rc5-virtme #1 Not tainted [ 43.843853][ T654] -------------------------------------------- [ 43.844029][ T654] ip/654 is trying to acquire lock: [ 43.844175][ T654] ffffffffa07d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.844474][ T654] [ 43.844474][ T654] but task is already holding lock: [ 43.844704][ T654] ffffffffa07d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.844997][ T654] [ 43.844997][ T654] other info that might help us debug this: [ 43.845213][ T654] Possible unsafe locking scenario: [ 43.845213][ T654] [ 43.845420][ T654] CPU0 [ 43.845527][ T654] ---- [ 43.845636][ T654] lock((netdev_chain).rwsem); [ 43.845789][ T654] lock((netdev_chain).rwsem); [ 43.845932][ T654] [ 43.845932][ T654] *** DEADLOCK *** [ 43.845932][ T654] [ 43.846159][ T654] May be due to missing lock nesting notation [ 43.846159][ T654] [ 43.846370][ T654] 2 locks held by ip/654: [ 43.846488][ T654] #0: ffffffffa07e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 43.846782][ T654] #1: ffffffffa07d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.847088][ T654] [ 43.847088][ T654] stack backtrace: [ 43.847371][ T654] CPU: 2 UID: 0 PID: 654 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 43.847603][ T654] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.847786][ T654] Call Trace: [ 43.847897][ T654] [ 43.847973][ T654] dump_stack_lvl+0x82/0xd0 [ 43.848133][ T654] print_deadlock_bug+0x40a/0x650 [ 43.848282][ T654] validate_chain+0x5bf/0xae0 [ 43.848436][ T654] ? __pfx_validate_chain+0x10/0x10 [ 43.848584][ T654] ? hlock_class+0x4e/0x130 [ 43.848732][ T654] ? mark_lock+0x38/0x3e0 [ 43.848845][ T654] __lock_acquire+0xb9a/0x1680 [ 43.848993][ T654] lock_acquire.part.0+0xeb/0x330 [ 43.849138][ T654] ? blocking_notifier_call_chain+0x50/0x90 [ 43.849319][ T654] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 43.849508][ T654] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.849652][ T654] ? trace_lock_acquire+0x14c/0x1f0 [ 43.849798][ T654] ? lock_acquire+0x32/0xc0 [ 43.849942][ T654] ? blocking_notifier_call_chain+0x50/0x90 [ 43.850122][ T654] down_read+0x9f/0x340 [ 43.850233][ T654] ? blocking_notifier_call_chain+0x50/0x90 [ 43.850417][ T654] ? __pfx_down_read+0x10/0x10 [ 43.850568][ T654] ? __lock_release+0x103/0x460 [ 43.850712][ T654] ? netconsole_netdev_event+0x2c1/0x620 [ 43.850857][ T654] ? __pfx___lock_release+0x10/0x10 [ 43.851016][ T654] blocking_notifier_call_chain+0x50/0x90 [ 43.851162][ T654] __netdev_upper_dev_unlink+0xd9/0x220 [ 43.851309][ T654] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 43.851501][ T654] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 43.851660][ T654] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 43.851850][ T654] ? rtnl_is_locked+0x15/0x20 [ 43.851999][ T654] netdev_upper_dev_unlink+0x71/0xa0 [ 43.852152][ T654] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 43.852333][ T654] ? netconsole_netdev_event+0x2c1/0x620 [ 43.852488][ T654] ? mutex_is_locked+0x1c/0x60 [ 43.852638][ T654] ? rtnl_is_locked+0x15/0x20 [ 43.852795][ T654] ? netdev_master_upper_dev_get+0x13/0x120 [ 43.852984][ T654] vrf_device_event+0x78/0xe0 [vrf] [ 43.853138][ T654] notifier_call_chain+0xcd/0x150 [ 43.853284][ T654] blocking_notifier_call_chain+0x66/0x90 [ 43.853431][ T654] unregister_netdevice_many_notify+0xa7b/0x1580 [ 43.853625][ T654] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 43.853811][ T654] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 43.853961][ T654] ? __pfx___lock_release+0x10/0x10 [ 43.854107][ T654] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.854254][ T654] ? rtnl_is_locked+0x15/0x20 [ 43.854399][ T654] ? unregister_netdevice_queue+0x70/0x410 [ 43.854578][ T654] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 43.854762][ T654] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 43.854910][ T654] rtnl_dellink+0x348/0xa40 [ 43.855057][ T654] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.855220][ T654] ? find_held_lock+0x2c/0x110 [ 43.855367][ T654] ? __lock_release+0x103/0x460 [ 43.855511][ T654] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.855657][ T654] ? __pfx___lock_release+0x10/0x10 [ 43.855804][ T654] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.855957][ T654] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.856102][ T654] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.856247][ T654] rtnetlink_rcv_msg+0x712/0xc10 [ 43.856392][ T654] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.856537][ T654] ? hlock_class+0x4e/0x130 [ 43.856680][ T654] ? mark_lock+0x38/0x3e0 [ 43.856791][ T654] ? __lock_acquire+0xb9a/0x1680 [ 43.856946][ T654] netlink_rcv_skb+0x130/0x360 [ 43.857091][ T654] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.857236][ T654] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 43.857385][ T654] ? netlink_deliver_tap+0x13e/0x340 [ 43.857532][ T654] ? netlink_deliver_tap+0xc3/0x340 [ 43.857690][ T654] netlink_unicast+0x44b/0x710 [ 43.857834][ T654] ? __pfx_netlink_unicast+0x10/0x10 [ 43.857980][ T654] ? find_held_lock+0x2c/0x110 [ 43.858127][ T654] netlink_sendmsg+0x723/0xbe0 [ 43.858270][ T654] ? __pfx_netlink_sendmsg+0x10/0x10 [ 43.858419][ T654] ____sys_sendmsg+0x7ac/0xa10 [ 43.858563][ T654] ? __pfx_____sys_sendmsg+0x10/0x10 [ 43.858707][ T654] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 43.858889][ T654] ___sys_sendmsg+0xee/0x170 [ 43.859042][ T654] ? __pfx____sys_sendmsg+0x10/0x10 [ 43.859187][ T654] ? kasan_save_stack+0x34/0x50 [ 43.859333][ T654] ? kasan_save_stack+0x24/0x50 [ 43.859476][ T654] ? __kasan_record_aux_stack+0x8e/0xa0 [ 43.859621][ T654] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 43.859802][ T654] ? __x64_sys_close+0x7c/0xd0 [ 43.859949][ T654] ? do_syscall_64+0xc1/0x1d0 [ 43.860097][ T654] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.860280][ T654] ? __lock_acquire+0xb9a/0x1680 [ 43.860428][ T654] ? find_held_lock+0x2c/0x110 [ 43.860575][ T654] ? __lock_release+0x103/0x460 [ 43.860720][ T654] ? __virt_addr_valid+0x22b/0x430 [ 43.860866][ T654] ? __pfx___lock_release+0x10/0x10 [ 43.861012][ T654] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.861163][ T654] __sys_sendmsg+0x109/0x1a0 [ 43.861307][ T654] ? __pfx___sys_sendmsg+0x10/0x10 [ 43.861451][ T654] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 43.861637][ T654] do_syscall_64+0xc1/0x1d0 [ 43.861782][ T654] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.861961][ T654] RIP: 0033:0x7f5cabcbb9a7 [ 43.862116][ T654] 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 [ 43.862627][ T654] RSP: 002b:00007ffe4d8180d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 43.862850][ T654] RAX: ffffffffffffffda RBX: 00007ffe4d818800 RCX: 00007f5cabcbb9a7 [ 43.863066][ T654] RDX: 0000000000000000 RSI: 00007ffe4d818140 RDI: 0000000000000005 [ 43.863296][ T654] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 43.863525][ T654] R10: 00007f5cabb79ef8 R11: 0000000000000246 R12: 0000000000000002 [ 43.863741][ T654] R13: 0000000067790422 R14: 0000000000498600 R15: 0000000000000000 [ 43.863961][ T654] [ 43.882005][ T654] ip (654) used greatest stack depth: 23128 bytes left