[ 17.621803][ T352] ip (352) used greatest stack depth: 23832 bytes left [ 17.896341][ T355] 8021q: 802.1Q VLAN Support v1.8 [ 18.363828][ T361] gre: GRE over IPv4 demultiplexor driver [ 18.436586][ T361] ip6_gre: GRE over IPv6 tunneling driver [ 28.574101][ T445] GACT probability NOT on [ 46.065364][ T658] [ 46.065589][ T658] ============================================ [ 46.065901][ T658] WARNING: possible recursive locking detected [ 46.066204][ T658] 6.13.0-rc5-virtme #1 Not tainted [ 46.066435][ T658] -------------------------------------------- [ 46.066724][ T658] ip/658 is trying to acquire lock: [ 46.066970][ T658] ffffffffae7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.067457][ T658] [ 46.067457][ T658] but task is already holding lock: [ 46.067792][ T658] ffffffffae7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.068258][ T658] [ 46.068258][ T658] other info that might help us debug this: [ 46.068596][ T658] Possible unsafe locking scenario: [ 46.068596][ T658] [ 46.068942][ T658] CPU0 [ 46.069124][ T658] ---- [ 46.069308][ T658] lock((netdev_chain).rwsem); [ 46.069553][ T658] lock((netdev_chain).rwsem); [ 46.069795][ T658] [ 46.069795][ T658] *** DEADLOCK *** [ 46.069795][ T658] [ 46.070154][ T658] May be due to missing lock nesting notation [ 46.070154][ T658] [ 46.070514][ T658] 2 locks held by ip/658: [ 46.070692][ T658] #0: ffffffffae7e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 46.071114][ T658] #1: ffffffffae7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.071580][ T658] [ 46.071580][ T658] stack backtrace: [ 46.071867][ T658] CPU: 2 UID: 0 PID: 658 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 46.072225][ T658] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 46.072511][ T658] Call Trace: [ 46.072689][ T658] [ 46.072800][ T658] dump_stack_lvl+0x82/0xd0 [ 46.073061][ T658] print_deadlock_bug+0x40a/0x650 [ 46.073276][ T658] validate_chain+0x5bf/0xae0 [ 46.073481][ T658] ? __pfx_validate_chain+0x10/0x10 [ 46.073643][ T658] ? hlock_class+0x4e/0x130 [ 46.073789][ T658] ? mark_lock+0x38/0x3e0 [ 46.073906][ T658] __lock_acquire+0xb9a/0x1680 [ 46.074081][ T658] lock_acquire.part.0+0xeb/0x330 [ 46.074242][ T658] ? blocking_notifier_call_chain+0x50/0x90 [ 46.074475][ T658] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 46.074692][ T658] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.074884][ T658] ? trace_lock_acquire+0x14c/0x1f0 [ 46.075068][ T658] ? lock_acquire+0x32/0xc0 [ 46.075216][ T658] ? blocking_notifier_call_chain+0x50/0x90 [ 46.075470][ T658] down_read+0x9f/0x340 [ 46.075648][ T658] ? blocking_notifier_call_chain+0x50/0x90 [ 46.075946][ T658] ? __pfx_down_read+0x10/0x10 [ 46.076186][ T658] ? __lock_release+0x103/0x460 [ 46.076348][ T658] ? netconsole_netdev_event+0x2c1/0x620 [ 46.076505][ T658] ? __pfx___lock_release+0x10/0x10 [ 46.076665][ T658] blocking_notifier_call_chain+0x50/0x90 [ 46.076855][ T658] __netdev_upper_dev_unlink+0xd9/0x220 [ 46.077015][ T658] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 46.077205][ T658] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 46.077352][ T658] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 46.077541][ T658] ? rtnl_is_locked+0x15/0x20 [ 46.077728][ T658] netdev_upper_dev_unlink+0x71/0xa0 [ 46.077905][ T658] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 46.078137][ T658] ? netconsole_netdev_event+0x2c1/0x620 [ 46.078286][ T658] ? mutex_is_locked+0x1c/0x60 [ 46.078442][ T658] ? rtnl_is_locked+0x15/0x20 [ 46.078636][ T658] ? netdev_master_upper_dev_get+0x13/0x120 [ 46.078829][ T658] vrf_device_event+0x78/0xe0 [vrf] [ 46.078991][ T658] notifier_call_chain+0xcd/0x150 [ 46.079169][ T658] blocking_notifier_call_chain+0x66/0x90 [ 46.079315][ T658] unregister_netdevice_many_notify+0xa7b/0x1580 [ 46.079503][ T658] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 46.079685][ T658] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 46.079842][ T658] ? __pfx___lock_release+0x10/0x10 [ 46.079993][ T658] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.080178][ T658] ? rtnl_is_locked+0x15/0x20 [ 46.080327][ T658] ? unregister_netdevice_queue+0x70/0x410 [ 46.080512][ T658] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 46.080692][ T658] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 46.080841][ T658] rtnl_dellink+0x348/0xa40 [ 46.081005][ T658] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.081176][ T658] ? find_held_lock+0x2c/0x110 [ 46.081326][ T658] ? __lock_release+0x103/0x460 [ 46.081471][ T658] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.081616][ T658] ? __pfx___lock_release+0x10/0x10 [ 46.081762][ T658] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.081909][ T658] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.082070][ T658] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.082218][ T658] rtnetlink_rcv_msg+0x712/0xc10 [ 46.082364][ T658] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.082509][ T658] ? hlock_class+0x4e/0x130 [ 46.082654][ T658] ? mark_lock+0x38/0x3e0 [ 46.082765][ T658] ? __lock_acquire+0xb9a/0x1680 [ 46.082917][ T658] netlink_rcv_skb+0x130/0x360 [ 46.083094][ T658] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.083250][ T658] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 46.083400][ T658] ? netlink_deliver_tap+0x13e/0x340 [ 46.083547][ T658] ? netlink_deliver_tap+0xc3/0x340 [ 46.083694][ T658] netlink_unicast+0x44b/0x710 [ 46.083840][ T658] ? __pfx_netlink_unicast+0x10/0x10 [ 46.084000][ T658] ? find_held_lock+0x2c/0x110 [ 46.084166][ T658] netlink_sendmsg+0x723/0xbe0 [ 46.084322][ T658] ? __pfx_netlink_sendmsg+0x10/0x10 [ 46.084469][ T658] ____sys_sendmsg+0x7ac/0xa10 [ 46.084618][ T658] ? __pfx_____sys_sendmsg+0x10/0x10 [ 46.084763][ T658] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 46.084956][ T658] ___sys_sendmsg+0xee/0x170 [ 46.085112][ T658] ? __pfx____sys_sendmsg+0x10/0x10 [ 46.085260][ T658] ? kasan_save_stack+0x34/0x50 [ 46.085416][ T658] ? kasan_save_stack+0x24/0x50 [ 46.085561][ T658] ? __kasan_record_aux_stack+0x8e/0xa0 [ 46.085708][ T658] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 46.085894][ T658] ? __x64_sys_close+0x7c/0xd0 [ 46.086053][ T658] ? do_syscall_64+0xc1/0x1d0 [ 46.086203][ T658] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.086387][ T658] ? __lock_acquire+0xb9a/0x1680 [ 46.086548][ T658] ? find_held_lock+0x2c/0x110 [ 46.086695][ T658] ? __lock_release+0x103/0x460 [ 46.086840][ T658] ? __virt_addr_valid+0x22b/0x430 [ 46.086990][ T658] ? __pfx___lock_release+0x10/0x10 [ 46.087145][ T658] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.087292][ T658] __sys_sendmsg+0x109/0x1a0 [ 46.087439][ T658] ? __pfx___sys_sendmsg+0x10/0x10 [ 46.087605][ T658] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 46.087862][ T658] do_syscall_64+0xc1/0x1d0 [ 46.088023][ T658] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.088293][ T658] RIP: 0033:0x7fb5b82a99a7 [ 46.088453][ T658] 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 [ 46.089134][ T658] RSP: 002b:00007fff4b3a6fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.089377][ T658] RAX: ffffffffffffffda RBX: 00007fff4b3a7700 RCX: 00007fb5b82a99a7 [ 46.089618][ T658] RDX: 0000000000000000 RSI: 00007fff4b3a7040 RDI: 0000000000000005 [ 46.089860][ T658] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 46.090112][ T658] R10: 00007fb5b8167ef8 R11: 0000000000000246 R12: 0000000000000002 [ 46.090354][ T658] R13: 0000000067792b4e R14: 0000000000498600 R15: 0000000000000000 [ 46.090599][ T658]