[ 11.120611][ T271] ip (271) used greatest stack depth: 23136 bytes left [ 15.363800][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 15.680682][ T341] gre: GRE over IPv4 demultiplexor driver [ 15.720568][ T341] ip6_gre: GRE over IPv6 tunneling driver [ 24.897287][ T416] GACT probability NOT on [ 41.422011][ T633] [ 41.422204][ T633] ============================================ [ 41.422392][ T633] WARNING: possible recursive locking detected [ 41.422571][ T633] 6.13.0-rc5-virtme #1 Not tainted [ 41.422716][ T633] -------------------------------------------- [ 41.422893][ T633] ip/633 is trying to acquire lock: [ 41.423035][ T633] ffffffff91fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 41.423339][ T633] [ 41.423339][ T633] but task is already holding lock: [ 41.423553][ T633] ffffffff91fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 41.423850][ T633] [ 41.423850][ T633] other info that might help us debug this: [ 41.424063][ T633] Possible unsafe locking scenario: [ 41.424063][ T633] [ 41.424280][ T633] CPU0 [ 41.424388][ T633] ---- [ 41.424496][ T633] lock((netdev_chain).rwsem); [ 41.424640][ T633] lock((netdev_chain).rwsem); [ 41.424783][ T633] [ 41.424783][ T633] *** DEADLOCK *** [ 41.424783][ T633] [ 41.424995][ T633] May be due to missing lock nesting notation [ 41.424995][ T633] [ 41.425205][ T633] 2 locks held by ip/633: [ 41.425320][ T633] #0: ffffffff91fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 41.425586][ T633] #1: ffffffff91fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 41.425877][ T633] [ 41.425877][ T633] stack backtrace: [ 41.426055][ T633] CPU: 2 UID: 0 PID: 633 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 41.426276][ T633] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 41.426464][ T633] Call Trace: [ 41.426576][ T633] [ 41.426660][ T633] dump_stack_lvl+0x82/0xd0 [ 41.426809][ T633] print_deadlock_bug+0x40a/0x650 [ 41.426955][ T633] validate_chain+0x5bf/0xae0 [ 41.427100][ T633] ? __pfx_validate_chain+0x10/0x10 [ 41.427249][ T633] ? hlock_class+0x4e/0x130 [ 41.427399][ T633] ? mark_lock+0x38/0x3e0 [ 41.427514][ T633] __lock_acquire+0xb9a/0x1680 [ 41.427661][ T633] lock_acquire.part.0+0xeb/0x330 [ 41.427808][ T633] ? blocking_notifier_call_chain+0x50/0x90 [ 41.427988][ T633] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 41.428172][ T633] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 41.428317][ T633] ? trace_lock_acquire+0x14c/0x1f0 [ 41.428468][ T633] ? lock_acquire+0x32/0xc0 [ 41.428615][ T633] ? blocking_notifier_call_chain+0x50/0x90 [ 41.428799][ T633] down_read+0x9f/0x340 [ 41.428912][ T633] ? blocking_notifier_call_chain+0x50/0x90 [ 41.429096][ T633] ? __pfx_down_read+0x10/0x10 [ 41.429250][ T633] ? __lock_release+0x103/0x460 [ 41.429394][ T633] ? netconsole_netdev_event+0x2c1/0x620 [ 41.429542][ T633] ? __pfx___lock_release+0x10/0x10 [ 41.429696][ T633] blocking_notifier_call_chain+0x50/0x90 [ 41.429856][ T633] __netdev_upper_dev_unlink+0xd9/0x220 [ 41.430004][ T633] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 41.430186][ T633] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 41.430331][ T633] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 41.430510][ T633] ? rtnl_is_locked+0x15/0x20 [ 41.430663][ T633] netdev_upper_dev_unlink+0x71/0xa0 [ 41.430811][ T633] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 41.430991][ T633] ? netconsole_netdev_event+0x2c1/0x620 [ 41.431137][ T633] ? mutex_is_locked+0x1c/0x60 [ 41.431284][ T633] ? rtnl_is_locked+0x15/0x20 [ 41.431431][ T633] ? netdev_master_upper_dev_get+0x13/0x120 [ 41.431612][ T633] vrf_device_event+0x78/0xe0 [vrf] [ 41.431768][ T633] notifier_call_chain+0xcd/0x150 [ 41.431915][ T633] blocking_notifier_call_chain+0x66/0x90 [ 41.432062][ T633] unregister_netdevice_many_notify+0xa7b/0x1580 [ 41.432251][ T633] ? __lock_release+0x103/0x460 [ 41.432397][ T633] ? __pfx___lock_release+0x10/0x10 [ 41.432546][ T633] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 41.432733][ T633] ? hlock_class+0x4e/0x130 [ 41.432879][ T633] ? mark_held_locks+0x9e/0xe0 [ 41.433025][ T633] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 41.433182][ T633] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 41.433362][ T633] rtnl_dellink+0x348/0xa40 [ 41.433508][ T633] ? __pfx_rtnl_dellink+0x10/0x10 [ 41.433668][ T633] ? find_held_lock+0x2c/0x110 [ 41.433816][ T633] ? __lock_release+0x103/0x460 [ 41.433965][ T633] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 41.434110][ T633] ? __pfx___lock_release+0x10/0x10 [ 41.434256][ T633] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 41.434404][ T633] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 41.434547][ T633] ? __pfx_rtnl_dellink+0x10/0x10 [ 41.434691][ T633] rtnetlink_rcv_msg+0x712/0xc10 [ 41.434837][ T633] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 41.434990][ T633] ? hlock_class+0x4e/0x130 [ 41.435135][ T633] ? mark_lock+0x38/0x3e0 [ 41.435246][ T633] ? __lock_acquire+0xb9a/0x1680 [ 41.435393][ T633] netlink_rcv_skb+0x130/0x360 [ 41.435540][ T633] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 41.435684][ T633] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 41.435834][ T633] ? netlink_deliver_tap+0x13e/0x340 [ 41.435986][ T633] ? netlink_deliver_tap+0xc3/0x340 [ 41.436133][ T633] netlink_unicast+0x44b/0x710 [ 41.436278][ T633] ? __pfx_netlink_unicast+0x10/0x10 [ 41.436424][ T633] ? find_held_lock+0x2c/0x110 [ 41.436571][ T633] netlink_sendmsg+0x723/0xbe0 [ 41.436717][ T633] ? __pfx_netlink_sendmsg+0x10/0x10 [ 41.436865][ T633] ____sys_sendmsg+0x7ac/0xa10 [ 41.437016][ T633] ? __pfx_____sys_sendmsg+0x10/0x10 [ 41.437167][ T633] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 41.437353][ T633] ___sys_sendmsg+0xee/0x170 [ 41.437500][ T633] ? __pfx____sys_sendmsg+0x10/0x10 [ 41.437646][ T633] ? kasan_save_stack+0x34/0x50 [ 41.437792][ T633] ? kasan_save_stack+0x24/0x50 [ 41.437936][ T633] ? __kasan_record_aux_stack+0x8e/0xa0 [ 41.438088][ T633] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 41.438270][ T633] ? __x64_sys_close+0x7c/0xd0 [ 41.438423][ T633] ? do_syscall_64+0xc1/0x1d0 [ 41.438579][ T633] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 41.438771][ T633] ? __lock_acquire+0xb9a/0x1680 [ 41.438918][ T633] ? find_held_lock+0x2c/0x110 [ 41.439064][ T633] ? __lock_release+0x103/0x460 [ 41.439207][ T633] ? __virt_addr_valid+0x22b/0x430 [ 41.439365][ T633] ? __pfx___lock_release+0x10/0x10 [ 41.439509][ T633] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 41.439659][ T633] __sys_sendmsg+0x109/0x1a0 [ 41.439818][ T633] ? __pfx___sys_sendmsg+0x10/0x10 [ 41.439964][ T633] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 41.440152][ T633] do_syscall_64+0xc1/0x1d0 [ 41.440299][ T633] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 41.440486][ T633] RIP: 0033:0x7f1213c5b9a7 [ 41.440638][ T633] 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 [ 41.441175][ T633] RSP: 002b:00007fff4d643528 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 41.441404][ T633] RAX: ffffffffffffffda RBX: 00007fff4d643c50 RCX: 00007f1213c5b9a7 [ 41.441624][ T633] RDX: 0000000000000000 RSI: 00007fff4d643590 RDI: 0000000000000005 [ 41.441843][ T633] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 41.442062][ T633] R10: 00007f1213b19ef8 R11: 0000000000000246 R12: 0000000000000002 [ 41.442285][ T633] R13: 000000006779044f R14: 0000000000498600 R15: 0000000000000000 [ 41.442508][ T633]