[ 10.827772][ T248] ip (248) used greatest stack depth: 24440 bytes left [ 11.195703][ T257] ip (257) used greatest stack depth: 23376 bytes left [ 14.459414][ T308] 8021q: 802.1Q VLAN Support v1.8 [ 15.242336][ T319] gre: GRE over IPv4 demultiplexor driver [ 15.255453][ T319] ip_gre: GRE over IPv4 tunneling driver [ 20.156770][ T388] GACT probability NOT on [ 82.818231][ T681] [ 82.818358][ T681] ============================================ [ 82.818561][ T681] WARNING: possible recursive locking detected [ 82.818745][ T681] 6.13.0-rc5-virtme #1 Not tainted [ 82.818893][ T681] -------------------------------------------- [ 82.819075][ T681] ip/681 is trying to acquire lock: [ 82.819216][ T681] ffffffffaa7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 82.819531][ T681] [ 82.819531][ T681] but task is already holding lock: [ 82.819754][ T681] ffffffffaa7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 82.820052][ T681] [ 82.820052][ T681] other info that might help us debug this: [ 82.820279][ T681] Possible unsafe locking scenario: [ 82.820279][ T681] [ 82.820506][ T681] CPU0 [ 82.820617][ T681] ---- [ 82.820723][ T681] lock((netdev_chain).rwsem); [ 82.820877][ T681] lock((netdev_chain).rwsem); [ 82.821028][ T681] [ 82.821028][ T681] *** DEADLOCK *** [ 82.821028][ T681] [ 82.821247][ T681] May be due to missing lock nesting notation [ 82.821247][ T681] [ 82.821460][ T681] 2 locks held by ip/681: [ 82.821583][ T681] #0: ffffffffaa7e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 82.821848][ T681] #1: ffffffffaa7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 82.822152][ T681] [ 82.822152][ T681] stack backtrace: [ 82.822331][ T681] CPU: 3 UID: 0 PID: 681 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 82.822562][ T681] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 82.822748][ T681] Call Trace: [ 82.822858][ T681] [ 82.822934][ T681] dump_stack_lvl+0x82/0xd0 [ 82.823087][ T681] print_deadlock_bug+0x40a/0x650 [ 82.823234][ T681] validate_chain+0x5bf/0xae0 [ 82.823392][ T681] ? __pfx_validate_chain+0x10/0x10 [ 82.823545][ T681] ? hlock_class+0x4e/0x130 [ 82.823688][ T681] ? mark_lock+0x38/0x3e0 [ 82.823805][ T681] __lock_acquire+0xb9a/0x1680 [ 82.823953][ T681] lock_acquire.part.0+0xeb/0x330 [ 82.824100][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 82.824296][ T681] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 82.824486][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 82.824631][ T681] ? trace_lock_acquire+0x14c/0x1f0 [ 82.824786][ T681] ? lock_acquire+0x32/0xc0 [ 82.824952][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 82.825135][ T681] down_read+0x9f/0x340 [ 82.825247][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 82.825428][ T681] ? __pfx_down_read+0x10/0x10 [ 82.825596][ T681] ? __lock_release+0x103/0x460 [ 82.825749][ T681] ? netconsole_netdev_event+0x2c1/0x620 [ 82.825907][ T681] ? __pfx___lock_release+0x10/0x10 [ 82.826058][ T681] blocking_notifier_call_chain+0x50/0x90 [ 82.826202][ T681] __netdev_upper_dev_unlink+0xd9/0x220 [ 82.826359][ T681] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 82.826547][ T681] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 82.826703][ T681] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 82.826884][ T681] ? rtnl_is_locked+0x15/0x20 [ 82.827052][ T681] netdev_upper_dev_unlink+0x71/0xa0 [ 82.827198][ T681] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 82.827387][ T681] ? netconsole_netdev_event+0x2c1/0x620 [ 82.827535][ T681] ? mutex_is_locked+0x1c/0x60 [ 82.827681][ T681] ? rtnl_is_locked+0x15/0x20 [ 82.827832][ T681] ? netdev_master_upper_dev_get+0x13/0x120 [ 82.828019][ T681] vrf_device_event+0x78/0xe0 [vrf] [ 82.828178][ T681] notifier_call_chain+0xcd/0x150 [ 82.828342][ T681] blocking_notifier_call_chain+0x66/0x90 [ 82.828495][ T681] unregister_netdevice_many_notify+0xa7b/0x1580 [ 82.828674][ T681] ? hlock_class+0x4e/0x130 [ 82.828836][ T681] ? mark_lock+0x38/0x3e0 [ 82.828949][ T681] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 82.829146][ T681] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 82.829334][ T681] ? kfree+0xf3/0x330 [ 82.829461][ T681] ? vlan_vid_del+0x310/0x5e0 [ 82.829612][ T681] ? vlan_vid_del+0x310/0x5e0 [ 82.829759][ T681] rtnl_dellink+0x348/0xa40 [ 82.829906][ T681] ? __pfx_rtnl_dellink+0x10/0x10 [ 82.830081][ T681] ? find_held_lock+0x2c/0x110 [ 82.830228][ T681] ? __lock_release+0x103/0x460 [ 82.830375][ T681] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 82.830530][ T681] ? __pfx___lock_release+0x10/0x10 [ 82.830674][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 82.830822][ T681] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 82.830982][ T681] ? __pfx_rtnl_dellink+0x10/0x10 [ 82.831128][ T681] rtnetlink_rcv_msg+0x712/0xc10 [ 82.831273][ T681] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 82.831419][ T681] ? hlock_class+0x4e/0x130 [ 82.831566][ T681] ? mark_lock+0x38/0x3e0 [ 82.831684][ T681] ? __lock_acquire+0xb9a/0x1680 [ 82.831838][ T681] netlink_rcv_skb+0x130/0x360 [ 82.831995][ T681] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 82.832142][ T681] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 82.832300][ T681] ? netlink_deliver_tap+0x13e/0x340 [ 82.832446][ T681] ? netlink_deliver_tap+0xc3/0x340 [ 82.832612][ T681] netlink_unicast+0x44b/0x710 [ 82.832757][ T681] ? __pfx_netlink_unicast+0x10/0x10 [ 82.832906][ T681] ? find_held_lock+0x2c/0x110 [ 82.833064][ T681] netlink_sendmsg+0x723/0xbe0 [ 82.833210][ T681] ? __pfx_netlink_sendmsg+0x10/0x10 [ 82.833359][ T681] ____sys_sendmsg+0x7ac/0xa10 [ 82.833522][ T681] ? __pfx_____sys_sendmsg+0x10/0x10 [ 82.833672][ T681] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 82.833876][ T681] ___sys_sendmsg+0xee/0x170 [ 82.834021][ T681] ? __pfx____sys_sendmsg+0x10/0x10 [ 82.834167][ T681] ? kasan_save_stack+0x34/0x50 [ 82.834337][ T681] ? kasan_save_stack+0x24/0x50 [ 82.834497][ T681] ? __kasan_record_aux_stack+0x8e/0xa0 [ 82.834641][ T681] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 82.834827][ T681] ? __x64_sys_close+0x7c/0xd0 [ 82.834971][ T681] ? do_syscall_64+0xc1/0x1d0 [ 82.835118][ T681] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.835309][ T681] ? __lock_acquire+0xb9a/0x1680 [ 82.835457][ T681] ? find_held_lock+0x2c/0x110 [ 82.835614][ T681] ? __lock_release+0x103/0x460 [ 82.835766][ T681] ? __virt_addr_valid+0x22b/0x430 [ 82.835911][ T681] ? __pfx___lock_release+0x10/0x10 [ 82.836064][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 82.836210][ T681] __sys_sendmsg+0x109/0x1a0 [ 82.836356][ T681] ? __pfx___sys_sendmsg+0x10/0x10 [ 82.836506][ T681] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 82.836700][ T681] do_syscall_64+0xc1/0x1d0 [ 82.836845][ T681] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.837028][ T681] RIP: 0033:0x7f505c9ca9a7 [ 82.837195][ T681] 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 [ 82.837720][ T681] RSP: 002b:00007ffe32cedc28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 82.837941][ T681] RAX: ffffffffffffffda RBX: 00007ffe32cee350 RCX: 00007f505c9ca9a7 [ 82.838163][ T681] RDX: 0000000000000000 RSI: 00007ffe32cedc90 RDI: 0000000000000005 [ 82.838394][ T681] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 82.838623][ T681] R10: 00007f505c888ef8 R11: 0000000000000246 R12: 0000000000000002 [ 82.838840][ T681] R13: 0000000067792de1 R14: 0000000000498600 R15: 0000000000000000 [ 82.839065][ T681]