[ 17.233546][ T354] 8021q: 802.1Q VLAN Support v1.8 [ 17.681599][ T360] gre: GRE over IPv4 demultiplexor driver [ 17.724159][ T360] ip6_gre: GRE over IPv6 tunneling driver [ 17.892704][ T365] ip (365) used greatest stack depth: 23288 bytes left [ 27.618080][ T443] GACT probability NOT on [ 44.526963][ T656] [ 44.527131][ T656] ============================================ [ 44.527326][ T656] WARNING: possible recursive locking detected [ 44.527513][ T656] 6.13.0-rc5-virtme #1 Not tainted [ 44.527668][ T656] -------------------------------------------- [ 44.527850][ T656] ip/656 is trying to acquire lock: [ 44.527993][ T656] ffffffff9f3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.528288][ T656] [ 44.528288][ T656] but task is already holding lock: [ 44.528498][ T656] ffffffff9f3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.528793][ T656] [ 44.528793][ T656] other info that might help us debug this: [ 44.529001][ T656] Possible unsafe locking scenario: [ 44.529001][ T656] [ 44.529212][ T656] CPU0 [ 44.529319][ T656] ---- [ 44.529426][ T656] lock((netdev_chain).rwsem); [ 44.529571][ T656] lock((netdev_chain).rwsem); [ 44.529731][ T656] [ 44.529731][ T656] *** DEADLOCK *** [ 44.529731][ T656] [ 44.529946][ T656] May be due to missing lock nesting notation [ 44.529946][ T656] [ 44.530155][ T656] 2 locks held by ip/656: [ 44.530266][ T656] #0: ffffffff9f3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 44.530529][ T656] #1: ffffffff9f3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.530825][ T656] [ 44.530825][ T656] stack backtrace: [ 44.531007][ T656] CPU: 2 UID: 0 PID: 656 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 44.531228][ T656] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.531410][ T656] Call Trace: [ 44.531522][ T656] [ 44.531603][ T656] dump_stack_lvl+0x82/0xd0 [ 44.531753][ T656] print_deadlock_bug+0x40a/0x650 [ 44.531906][ T656] validate_chain+0x5bf/0xae0 [ 44.532059][ T656] ? __pfx_validate_chain+0x10/0x10 [ 44.532211][ T656] ? hlock_class+0x4e/0x130 [ 44.532354][ T656] ? mark_lock+0x38/0x3e0 [ 44.532467][ T656] __lock_acquire+0xb9a/0x1680 [ 44.532615][ T656] lock_acquire.part.0+0xeb/0x330 [ 44.532760][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.532941][ T656] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 44.533126][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.533273][ T656] ? trace_lock_acquire+0x14c/0x1f0 [ 44.533418][ T656] ? lock_acquire+0x32/0xc0 [ 44.533562][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.533746][ T656] down_read+0x9f/0x340 [ 44.533857][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.534045][ T656] ? __pfx_down_read+0x10/0x10 [ 44.534194][ T656] ? __lock_release+0x103/0x460 [ 44.534343][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 44.534493][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.534640][ T656] blocking_notifier_call_chain+0x50/0x90 [ 44.534787][ T656] __netdev_upper_dev_unlink+0xd9/0x220 [ 44.534934][ T656] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 44.535120][ T656] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 44.535264][ T656] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 44.535443][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.535591][ T656] netdev_upper_dev_unlink+0x71/0xa0 [ 44.535735][ T656] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 44.535912][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 44.536058][ T656] ? mutex_is_locked+0x1c/0x60 [ 44.536210][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.536353][ T656] ? netdev_master_upper_dev_get+0x13/0x120 [ 44.536533][ T656] vrf_device_event+0x78/0xe0 [vrf] [ 44.536682][ T656] notifier_call_chain+0xcd/0x150 [ 44.536829][ T656] blocking_notifier_call_chain+0x66/0x90 [ 44.536973][ T656] unregister_netdevice_many_notify+0xa7b/0x1580 [ 44.537155][ T656] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 44.537340][ T656] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 44.537487][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.537634][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.537780][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.537925][ T656] ? unregister_netdevice_queue+0x70/0x410 [ 44.538108][ T656] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 44.538295][ T656] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 44.538445][ T656] rtnl_dellink+0x348/0xa40 [ 44.538590][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.538748][ T656] ? find_held_lock+0x2c/0x110 [ 44.538895][ T656] ? __lock_release+0x103/0x460 [ 44.539040][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.539186][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.539335][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.539483][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.539641][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.539787][ T656] rtnetlink_rcv_msg+0x712/0xc10 [ 44.539930][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.540075][ T656] ? hlock_class+0x4e/0x130 [ 44.540219][ T656] ? mark_lock+0x38/0x3e0 [ 44.540335][ T656] ? __lock_acquire+0xb9a/0x1680 [ 44.540480][ T656] netlink_rcv_skb+0x130/0x360 [ 44.540627][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.540773][ T656] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 44.540923][ T656] ? netlink_deliver_tap+0x13e/0x340 [ 44.541071][ T656] ? netlink_deliver_tap+0xc3/0x340 [ 44.541216][ T656] netlink_unicast+0x44b/0x710 [ 44.541367][ T656] ? __pfx_netlink_unicast+0x10/0x10 [ 44.541514][ T656] ? find_held_lock+0x2c/0x110 [ 44.541662][ T656] netlink_sendmsg+0x723/0xbe0 [ 44.541806][ T656] ? __pfx_netlink_sendmsg+0x10/0x10 [ 44.541953][ T656] ____sys_sendmsg+0x7ac/0xa10 [ 44.542098][ T656] ? __pfx_____sys_sendmsg+0x10/0x10 [ 44.542242][ T656] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 44.542429][ T656] ___sys_sendmsg+0xee/0x170 [ 44.542578][ T656] ? __pfx____sys_sendmsg+0x10/0x10 [ 44.542724][ T656] ? kasan_save_stack+0x34/0x50 [ 44.542869][ T656] ? kasan_save_stack+0x24/0x50 [ 44.543013][ T656] ? __kasan_record_aux_stack+0x8e/0xa0 [ 44.543161][ T656] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 44.543342][ T656] ? __x64_sys_close+0x7c/0xd0 [ 44.543486][ T656] ? do_syscall_64+0xc1/0x1d0 [ 44.543636][ T656] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.543819][ T656] ? __lock_acquire+0xb9a/0x1680 [ 44.543966][ T656] ? find_held_lock+0x2c/0x110 [ 44.544113][ T656] ? __lock_release+0x103/0x460 [ 44.544257][ T656] ? __virt_addr_valid+0x22b/0x430 [ 44.544405][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.544550][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.544699][ T656] __sys_sendmsg+0x109/0x1a0 [ 44.544843][ T656] ? __pfx___sys_sendmsg+0x10/0x10 [ 44.544987][ T656] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 44.545171][ T656] do_syscall_64+0xc1/0x1d0 [ 44.545314][ T656] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.545493][ T656] RIP: 0033:0x7f4d8452c9a7 [ 44.545645][ T656] 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 [ 44.546159][ T656] RSP: 002b:00007ffdf9d15d78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.546377][ T656] RAX: ffffffffffffffda RBX: 00007ffdf9d164a0 RCX: 00007f4d8452c9a7 [ 44.546595][ T656] RDX: 0000000000000000 RSI: 00007ffdf9d15de0 RDI: 0000000000000005 [ 44.546821][ T656] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.547039][ T656] R10: 00007f4d843eaef8 R11: 0000000000000246 R12: 0000000000000002 [ 44.547258][ T656] R13: 0000000067795774 R14: 0000000000498600 R15: 0000000000000000 [ 44.547490][ T656]