[ 217.120932][ T1773] gre: GRE over IPv4 demultiplexor driver [ 217.158701][ T1773] ip_gre: GRE over IPv4 tunneling driver [ 218.868114][ T1795] 8021q: 802.1Q VLAN Support v1.8 [ 387.101646][ T2044] [ 387.101858][ T2044] ============================================ [ 387.102148][ T2044] WARNING: possible recursive locking detected [ 387.102452][ T2044] 6.13.0-rc5-virtme #1 Not tainted [ 387.102684][ T2044] -------------------------------------------- [ 387.102976][ T2044] ip/2044 is trying to acquire lock: [ 387.103207][ T2044] ffffffff923d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 387.103691][ T2044] [ 387.103691][ T2044] but task is already holding lock: [ 387.104030][ T2044] ffffffff923d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 387.104507][ T2044] [ 387.104507][ T2044] other info that might help us debug this: [ 387.104840][ T2044] Possible unsafe locking scenario: [ 387.104840][ T2044] [ 387.105172][ T2044] CPU0 [ 387.105346][ T2044] ---- [ 387.105525][ T2044] lock((netdev_chain).rwsem); [ 387.105759][ T2044] lock((netdev_chain).rwsem); [ 387.105990][ T2044] [ 387.105990][ T2044] *** DEADLOCK *** [ 387.105990][ T2044] [ 387.106332][ T2044] May be due to missing lock nesting notation [ 387.106332][ T2044] [ 387.106657][ T2044] 2 locks held by ip/2044: [ 387.106882][ T2044] #0: ffffffff923e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 387.107316][ T2044] #1: ffffffff923d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 387.107797][ T2044] [ 387.107797][ T2044] stack backtrace: [ 387.108081][ T2044] CPU: 2 UID: 0 PID: 2044 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 387.108423][ T2044] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 387.108704][ T2044] Call Trace: [ 387.108891][ T2044] [ 387.109011][ T2044] dump_stack_lvl+0x82/0xd0 [ 387.109256][ T2044] print_deadlock_bug+0x40a/0x650 [ 387.109496][ T2044] validate_chain+0x5bf/0xae0 [ 387.109724][ T2044] ? __pfx_validate_chain+0x10/0x10 [ 387.109960][ T2044] ? hlock_class+0x4e/0x130 [ 387.110185][ T2044] ? mark_lock+0x38/0x3e0 [ 387.110366][ T2044] __lock_acquire+0xb9a/0x1680 [ 387.110603][ T2044] lock_acquire.part.0+0xeb/0x330 [ 387.110834][ T2044] ? blocking_notifier_call_chain+0x50/0x90 [ 387.111120][ T2044] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 387.111417][ T2044] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 387.111648][ T2044] ? trace_lock_acquire+0x14c/0x1f0 [ 387.111875][ T2044] ? lock_acquire+0x32/0xc0 [ 387.112102][ T2044] ? blocking_notifier_call_chain+0x50/0x90 [ 387.112380][ T2044] down_read+0x9f/0x340 [ 387.112552][ T2044] ? blocking_notifier_call_chain+0x50/0x90 [ 387.112845][ T2044] ? __pfx_down_read+0x10/0x10 [ 387.113074][ T2044] ? __lock_release+0x103/0x460 [ 387.113304][ T2044] ? netconsole_netdev_event+0x2c1/0x620 [ 387.113542][ T2044] ? __pfx___lock_release+0x10/0x10 [ 387.113772][ T2044] blocking_notifier_call_chain+0x50/0x90 [ 387.114004][ T2044] __netdev_upper_dev_unlink+0xd9/0x220 [ 387.114236][ T2044] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 387.114566][ T2044] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 387.114801][ T2044] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 387.115100][ T2044] ? rtnl_is_locked+0x15/0x20 [ 387.115334][ T2044] netdev_upper_dev_unlink+0x71/0xa0 [ 387.115565][ T2044] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 387.115850][ T2044] ? netconsole_netdev_event+0x2c1/0x620 [ 387.116088][ T2044] ? mutex_is_locked+0x1c/0x60 [ 387.116342][ T2044] ? rtnl_is_locked+0x15/0x20 [ 387.116568][ T2044] ? netdev_master_upper_dev_get+0x13/0x120 [ 387.116859][ T2044] vrf_device_event+0x78/0xe0 [vrf] [ 387.117125][ T2044] notifier_call_chain+0xcd/0x150 [ 387.117360][ T2044] blocking_notifier_call_chain+0x66/0x90 [ 387.117592][ T2044] unregister_netdevice_many_notify+0xa7b/0x1580 [ 387.117884][ T2044] ? hlock_class+0x4e/0x130 [ 387.118122][ T2044] ? mark_lock+0x38/0x3e0 [ 387.118298][ T2044] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 387.118586][ T2044] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 387.118875][ T2044] ? kfree+0xf3/0x330 [ 387.119057][ T2044] ? vlan_vid_del+0x310/0x5e0 [ 387.119295][ T2044] ? vlan_vid_del+0x310/0x5e0 [ 387.119535][ T2044] rtnl_dellink+0x348/0xa40 [ 387.119781][ T2044] ? __pfx_rtnl_dellink+0x10/0x10 [ 387.120038][ T2044] ? find_held_lock+0x2c/0x110 [ 387.120276][ T2044] ? __lock_release+0x103/0x460 [ 387.120509][ T2044] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 387.120740][ T2044] ? __pfx___lock_release+0x10/0x10 [ 387.120971][ T2044] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 387.121205][ T2044] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 387.121438][ T2044] ? __pfx_rtnl_dellink+0x10/0x10 [ 387.121673][ T2044] rtnetlink_rcv_msg+0x712/0xc10 [ 387.121904][ T2044] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 387.122132][ T2044] ? hlock_class+0x4e/0x130 [ 387.122360][ T2044] ? mark_lock+0x38/0x3e0 [ 387.122538][ T2044] ? __lock_acquire+0xb9a/0x1680 [ 387.122764][ T2044] netlink_rcv_skb+0x130/0x360 [ 387.122995][ T2044] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 387.123234][ T2044] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 387.123466][ T2044] ? netlink_deliver_tap+0x13e/0x340 [ 387.123696][ T2044] ? netlink_deliver_tap+0xc3/0x340 [ 387.123924][ T2044] netlink_unicast+0x44b/0x710 [ 387.124156][ T2044] ? __pfx_netlink_unicast+0x10/0x10 [ 387.124382][ T2044] ? find_held_lock+0x2c/0x110 [ 387.124618][ T2044] netlink_sendmsg+0x723/0xbe0 [ 387.124865][ T2044] ? __pfx_netlink_sendmsg+0x10/0x10 [ 387.125098][ T2044] ____sys_sendmsg+0x7ac/0xa10 [ 387.125330][ T2044] ? __pfx_____sys_sendmsg+0x10/0x10 [ 387.125554][ T2044] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 387.125844][ T2044] ___sys_sendmsg+0xee/0x170 [ 387.126074][ T2044] ? __pfx____sys_sendmsg+0x10/0x10 [ 387.126302][ T2044] ? kasan_save_stack+0x34/0x50 [ 387.126539][ T2044] ? kasan_save_stack+0x24/0x50 [ 387.126769][ T2044] ? __kasan_record_aux_stack+0x8e/0xa0 [ 387.127005][ T2044] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 387.127291][ T2044] ? __x64_sys_close+0x7c/0xd0 [ 387.127519][ T2044] ? do_syscall_64+0xc1/0x1d0 [ 387.127748][ T2044] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 387.128036][ T2044] ? __lock_acquire+0xb9a/0x1680 [ 387.128278][ T2044] ? find_held_lock+0x2c/0x110 [ 387.128512][ T2044] ? __lock_release+0x103/0x460 [ 387.128739][ T2044] ? __virt_addr_valid+0x22b/0x430 [ 387.128969][ T2044] ? __pfx___lock_release+0x10/0x10 [ 387.129195][ T2044] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 387.129424][ T2044] __sys_sendmsg+0x109/0x1a0 [ 387.129657][ T2044] ? __pfx___sys_sendmsg+0x10/0x10 [ 387.129893][ T2044] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 387.130188][ T2044] do_syscall_64+0xc1/0x1d0 [ 387.130423][ T2044] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 387.130712][ T2044] RIP: 0033:0x7f75d05ea9a7 [ 387.130953][ T2044] 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 [ 387.131774][ T2044] RSP: 002b:00007fffb10d8888 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 387.132127][ T2044] RAX: ffffffffffffffda RBX: 00007fffb10d8fb0 RCX: 00007f75d05ea9a7 [ 387.132469][ T2044] RDX: 0000000000000000 RSI: 00007fffb10d88f0 RDI: 0000000000000005 [ 387.132811][ T2044] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 387.133167][ T2044] R10: 00007f75d04a8ef8 R11: 0000000000000246 R12: 0000000000000002 [ 387.133514][ T2044] R13: 000000006779293e R14: 0000000000498600 R15: 0000000000000000 [ 387.133861][ T2044]