[ 10.879685][ T250] ip (250) used greatest stack depth: 24000 bytes left [ 16.259276][ T337] 8021q: 802.1Q VLAN Support v1.8 [ 16.631780][ T342] gre: GRE over IPv4 demultiplexor driver [ 16.679261][ T342] ip6_gre: GRE over IPv6 tunneling driver [ 18.703106][ T371] ip (371) used greatest stack depth: 22896 bytes left [ 26.074907][ T417] GACT probability NOT on [ 43.521814][ T634] [ 43.522044][ T634] ============================================ [ 43.522347][ T634] WARNING: possible recursive locking detected [ 43.522666][ T634] 6.13.0-rc5-virtme #1 Not tainted [ 43.522929][ T634] -------------------------------------------- [ 43.523232][ T634] ip/634 is trying to acquire lock: [ 43.523482][ T634] ffffffff9dbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.524013][ T634] [ 43.524013][ T634] but task is already holding lock: [ 43.524384][ T634] ffffffff9dbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.524888][ T634] [ 43.524888][ T634] other info that might help us debug this: [ 43.525258][ T634] Possible unsafe locking scenario: [ 43.525258][ T634] [ 43.525627][ T634] CPU0 [ 43.525820][ T634] ---- [ 43.526012][ T634] lock((netdev_chain).rwsem); [ 43.526282][ T634] lock((netdev_chain).rwsem); [ 43.526539][ T634] [ 43.526539][ T634] *** DEADLOCK *** [ 43.526539][ T634] [ 43.526895][ T634] May be due to missing lock nesting notation [ 43.526895][ T634] [ 43.527258][ T634] 2 locks held by ip/634: [ 43.527450][ T634] #0: ffffffff9dbe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 43.527924][ T634] #1: ffffffff9dbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.528435][ T634] [ 43.528435][ T634] stack backtrace: [ 43.528740][ T634] CPU: 0 UID: 0 PID: 634 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 43.529089][ T634] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.529391][ T634] Call Trace: [ 43.529577][ T634] [ 43.529712][ T634] dump_stack_lvl+0x82/0xd0 [ 43.529975][ T634] print_deadlock_bug+0x40a/0x650 [ 43.530224][ T634] validate_chain+0x5bf/0xae0 [ 43.530473][ T634] ? __pfx_validate_chain+0x10/0x10 [ 43.530723][ T634] ? hlock_class+0x4e/0x130 [ 43.530972][ T634] ? mark_lock+0x38/0x3e0 [ 43.531170][ T634] __lock_acquire+0xb9a/0x1680 [ 43.531421][ T634] lock_acquire.part.0+0xeb/0x330 [ 43.531667][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 43.531980][ T634] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 43.532291][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.532539][ T634] ? trace_lock_acquire+0x14c/0x1f0 [ 43.532793][ T634] ? lock_acquire+0x32/0xc0 [ 43.533049][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 43.533369][ T634] down_read+0x9f/0x340 [ 43.533562][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 43.533866][ T634] ? __pfx_down_read+0x10/0x10 [ 43.534102][ T634] ? __lock_release+0x103/0x460 [ 43.534352][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 43.534605][ T634] ? __pfx___lock_release+0x10/0x10 [ 43.534850][ T634] blocking_notifier_call_chain+0x50/0x90 [ 43.535099][ T634] __netdev_upper_dev_unlink+0xd9/0x220 [ 43.535356][ T634] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 43.535666][ T634] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 43.535916][ T634] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 43.536221][ T634] ? rtnl_is_locked+0x15/0x20 [ 43.536470][ T634] netdev_upper_dev_unlink+0x71/0xa0 [ 43.536721][ T634] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 43.537038][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 43.537291][ T634] ? mutex_is_locked+0x1c/0x60 [ 43.537537][ T634] ? rtnl_is_locked+0x15/0x20 [ 43.537783][ T634] ? netdev_master_upper_dev_get+0x13/0x120 [ 43.538088][ T634] vrf_device_event+0x78/0xe0 [vrf] [ 43.538343][ T634] notifier_call_chain+0xcd/0x150 [ 43.538598][ T634] blocking_notifier_call_chain+0x66/0x90 [ 43.538854][ T634] unregister_netdevice_many_notify+0xa7b/0x1580 [ 43.539159][ T634] ? __lock_release+0x103/0x460 [ 43.539405][ T634] ? __pfx___lock_release+0x10/0x10 [ 43.539655][ T634] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 43.539962][ T634] ? hlock_class+0x4e/0x130 [ 43.540213][ T634] ? mark_held_locks+0x9e/0xe0 [ 43.540459][ T634] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 43.540720][ T634] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 43.541029][ T634] rtnl_dellink+0x348/0xa40 [ 43.541293][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.541569][ T634] ? find_held_lock+0x2c/0x110 [ 43.541822][ T634] ? __lock_release+0x103/0x460 [ 43.542076][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.542319][ T634] ? __pfx___lock_release+0x10/0x10 [ 43.542563][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.542801][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.543042][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.543277][ T634] rtnetlink_rcv_msg+0x712/0xc10 [ 43.543517][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.543760][ T634] ? hlock_class+0x4e/0x130 [ 43.543993][ T634] ? mark_lock+0x38/0x3e0 [ 43.544179][ T634] ? __lock_acquire+0xb9a/0x1680 [ 43.544431][ T634] netlink_rcv_skb+0x130/0x360 [ 43.544674][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.544910][ T634] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 43.545145][ T634] ? netlink_deliver_tap+0x13e/0x340 [ 43.545370][ T634] ? netlink_deliver_tap+0xc3/0x340 [ 43.545609][ T634] netlink_unicast+0x44b/0x710 [ 43.545849][ T634] ? __pfx_netlink_unicast+0x10/0x10 [ 43.546086][ T634] ? find_held_lock+0x2c/0x110 [ 43.546325][ T634] netlink_sendmsg+0x723/0xbe0 [ 43.546564][ T634] ? __pfx_netlink_sendmsg+0x10/0x10 [ 43.546806][ T634] ____sys_sendmsg+0x7ac/0xa10 [ 43.547036][ T634] ? __pfx_____sys_sendmsg+0x10/0x10 [ 43.547269][ T634] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 43.547586][ T634] ___sys_sendmsg+0xee/0x170 [ 43.547826][ T634] ? __pfx____sys_sendmsg+0x10/0x10 [ 43.548066][ T634] ? kasan_save_stack+0x34/0x50 [ 43.548310][ T634] ? kasan_save_stack+0x24/0x50 [ 43.548545][ T634] ? __kasan_record_aux_stack+0x8e/0xa0 [ 43.548783][ T634] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 43.549067][ T634] ? __x64_sys_close+0x7c/0xd0 [ 43.549302][ T634] ? do_syscall_64+0xc1/0x1d0 [ 43.549530][ T634] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.549814][ T634] ? __lock_acquire+0xb9a/0x1680 [ 43.550062][ T634] ? find_held_lock+0x2c/0x110 [ 43.550292][ T634] ? __lock_release+0x103/0x460 [ 43.550525][ T634] ? __virt_addr_valid+0x22b/0x430 [ 43.550761][ T634] ? __pfx___lock_release+0x10/0x10 [ 43.550980][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.551237][ T634] __sys_sendmsg+0x109/0x1a0 [ 43.551467][ T634] ? __pfx___sys_sendmsg+0x10/0x10 [ 43.551703][ T634] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 43.552005][ T634] do_syscall_64+0xc1/0x1d0 [ 43.552261][ T634] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.552547][ T634] RIP: 0033:0x7fc34dd979a7 [ 43.552790][ T634] 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 [ 43.553630][ T634] RSP: 002b:00007ffc0fca78b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 43.553986][ T634] RAX: ffffffffffffffda RBX: 00007ffc0fca7fe0 RCX: 00007fc34dd979a7 [ 43.554329][ T634] RDX: 0000000000000000 RSI: 00007ffc0fca7920 RDI: 0000000000000005 [ 43.554671][ T634] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 43.555015][ T634] R10: 00007fc34dc55ef8 R11: 0000000000000246 R12: 0000000000000002 [ 43.555365][ T634] R13: 0000000067795799 R14: 0000000000498600 R15: 0000000000000000 [ 43.555726][ T634]