[ 16.363786][ T354] 8021q: 802.1Q VLAN Support v1.8 [ 16.798264][ T360] gre: GRE over IPv4 demultiplexor driver [ 16.856196][ T360] ip6_gre: GRE over IPv6 tunneling driver [ 17.143695][ T365] ip (365) used greatest stack depth: 23376 bytes left [ 26.556640][ T442] GACT probability NOT on [ 42.547814][ T655] [ 42.548010][ T655] ============================================ [ 42.548200][ T655] WARNING: possible recursive locking detected [ 42.548379][ T655] 6.13.0-rc5-virtme #1 Not tainted [ 42.548523][ T655] -------------------------------------------- [ 42.548703][ T655] ip/655 is trying to acquire lock: [ 42.548847][ T655] ffffffff9b1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.549148][ T655] [ 42.549148][ T655] but task is already holding lock: [ 42.549357][ T655] ffffffff9b1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.549646][ T655] [ 42.549646][ T655] other info that might help us debug this: [ 42.549854][ T655] Possible unsafe locking scenario: [ 42.549854][ T655] [ 42.550065][ T655] CPU0 [ 42.550172][ T655] ---- [ 42.550279][ T655] lock((netdev_chain).rwsem); [ 42.550422][ T655] lock((netdev_chain).rwsem); [ 42.550564][ T655] [ 42.550564][ T655] *** DEADLOCK *** [ 42.550564][ T655] [ 42.550787][ T655] May be due to missing lock nesting notation [ 42.550787][ T655] [ 42.551000][ T655] 2 locks held by ip/655: [ 42.551109][ T655] #0: ffffffff9b1e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 42.551373][ T655] #1: ffffffff9b1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.551662][ T655] [ 42.551662][ T655] stack backtrace: [ 42.551837][ T655] CPU: 0 UID: 0 PID: 655 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 42.552061][ T655] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.552241][ T655] Call Trace: [ 42.552351][ T655] [ 42.552426][ T655] dump_stack_lvl+0x82/0xd0 [ 42.552587][ T655] print_deadlock_bug+0x40a/0x650 [ 42.552734][ T655] validate_chain+0x5bf/0xae0 [ 42.552880][ T655] ? __pfx_validate_chain+0x10/0x10 [ 42.553027][ T655] ? hlock_class+0x4e/0x130 [ 42.553177][ T655] ? mark_lock+0x38/0x3e0 [ 42.553288][ T655] __lock_acquire+0xb9a/0x1680 [ 42.553434][ T655] lock_acquire.part.0+0xeb/0x330 [ 42.553578][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 42.553761][ T655] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 42.553945][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.554102][ T655] ? trace_lock_acquire+0x14c/0x1f0 [ 42.554266][ T655] ? lock_acquire+0x32/0xc0 [ 42.554411][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 42.554591][ T655] down_read+0x9f/0x340 [ 42.554702][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 42.554881][ T655] ? __pfx_down_read+0x10/0x10 [ 42.555026][ T655] ? __lock_release+0x103/0x460 [ 42.555169][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 42.555328][ T655] ? __pfx___lock_release+0x10/0x10 [ 42.555476][ T655] blocking_notifier_call_chain+0x50/0x90 [ 42.555621][ T655] __netdev_upper_dev_unlink+0xd9/0x220 [ 42.555766][ T655] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 42.555953][ T655] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 42.556099][ T655] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 42.556283][ T655] ? rtnl_is_locked+0x15/0x20 [ 42.556429][ T655] netdev_upper_dev_unlink+0x71/0xa0 [ 42.556574][ T655] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 42.556753][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 42.556906][ T655] ? mutex_is_locked+0x1c/0x60 [ 42.557052][ T655] ? rtnl_is_locked+0x15/0x20 [ 42.557197][ T655] ? netdev_master_upper_dev_get+0x13/0x120 [ 42.557380][ T655] vrf_device_event+0x78/0xe0 [vrf] [ 42.557541][ T655] notifier_call_chain+0xcd/0x150 [ 42.557689][ T655] blocking_notifier_call_chain+0x66/0x90 [ 42.557836][ T655] unregister_netdevice_many_notify+0xa7b/0x1580 [ 42.558025][ T655] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 42.558204][ T655] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 42.558354][ T655] ? __pfx___lock_release+0x10/0x10 [ 42.558517][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.558663][ T655] ? rtnl_is_locked+0x15/0x20 [ 42.558807][ T655] ? unregister_netdevice_queue+0x70/0x410 [ 42.558999][ T655] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 42.559192][ T655] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 42.559341][ T655] rtnl_dellink+0x348/0xa40 [ 42.559498][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.559669][ T655] ? find_held_lock+0x2c/0x110 [ 42.559817][ T655] ? __lock_release+0x103/0x460 [ 42.559970][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.560114][ T655] ? __pfx___lock_release+0x10/0x10 [ 42.560274][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.560422][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.560581][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.560733][ T655] rtnetlink_rcv_msg+0x712/0xc10 [ 42.560880][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.561033][ T655] ? hlock_class+0x4e/0x130 [ 42.561178][ T655] ? mark_lock+0x38/0x3e0 [ 42.561289][ T655] ? __lock_acquire+0xb9a/0x1680 [ 42.561436][ T655] netlink_rcv_skb+0x130/0x360 [ 42.561582][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.561732][ T655] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 42.561881][ T655] ? netlink_deliver_tap+0x13e/0x340 [ 42.562031][ T655] ? netlink_deliver_tap+0xc3/0x340 [ 42.562179][ T655] netlink_unicast+0x44b/0x710 [ 42.562324][ T655] ? __pfx_netlink_unicast+0x10/0x10 [ 42.562471][ T655] ? find_held_lock+0x2c/0x110 [ 42.562618][ T655] netlink_sendmsg+0x723/0xbe0 [ 42.562767][ T655] ? __pfx_netlink_sendmsg+0x10/0x10 [ 42.562914][ T655] ____sys_sendmsg+0x7ac/0xa10 [ 42.563061][ T655] ? __pfx_____sys_sendmsg+0x10/0x10 [ 42.563208][ T655] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 42.563403][ T655] ___sys_sendmsg+0xee/0x170 [ 42.563558][ T655] ? __pfx____sys_sendmsg+0x10/0x10 [ 42.563705][ T655] ? kasan_save_stack+0x34/0x50 [ 42.563864][ T655] ? kasan_save_stack+0x24/0x50 [ 42.564025][ T655] ? __kasan_record_aux_stack+0x8e/0xa0 [ 42.564175][ T655] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 42.564366][ T655] ? __x64_sys_close+0x7c/0xd0 [ 42.564513][ T655] ? do_syscall_64+0xc1/0x1d0 [ 42.564671][ T655] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.564860][ T655] ? __lock_acquire+0xb9a/0x1680 [ 42.565013][ T655] ? find_held_lock+0x2c/0x110 [ 42.565172][ T655] ? __lock_release+0x103/0x460 [ 42.565325][ T655] ? __virt_addr_valid+0x22b/0x430 [ 42.565472][ T655] ? __pfx___lock_release+0x10/0x10 [ 42.565626][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.565773][ T655] __sys_sendmsg+0x109/0x1a0 [ 42.565929][ T655] ? __pfx___sys_sendmsg+0x10/0x10 [ 42.566089][ T655] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 42.566276][ T655] do_syscall_64+0xc1/0x1d0 [ 42.566440][ T655] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.566630][ T655] RIP: 0033:0x7fccfad459a7 [ 42.566782][ T655] 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 [ 42.567334][ T655] RSP: 002b:00007ffe43b7e9b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.567579][ T655] RAX: ffffffffffffffda RBX: 00007ffe43b7f0e0 RCX: 00007fccfad459a7 [ 42.567805][ T655] RDX: 0000000000000000 RSI: 00007ffe43b7ea20 RDI: 0000000000000005 [ 42.568036][ T655] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.568302][ T655] R10: 00007fccfac03ef8 R11: 0000000000000246 R12: 0000000000000002 [ 42.568529][ T655] R13: 00000000677903f6 R14: 0000000000498600 R15: 0000000000000000 [ 42.568762][ T655]