[ 19.431868][ T806] ip (806) used greatest stack depth: 23632 bytes left [ 23.696358][ T870] gre: GRE over IPv4 demultiplexor driver [ 23.718037][ T870] ip_gre: GRE over IPv4 tunneling driver [ 25.356565][ T892] 8021q: 802.1Q VLAN Support v1.8 [ 28.313191][ T931] GACT probability NOT on [ 185.188426][ T1142] [ 185.188585][ T1142] ============================================ [ 185.188797][ T1142] WARNING: possible recursive locking detected [ 185.189010][ T1142] 6.13.0-rc5-virtme #1 Not tainted [ 185.189177][ T1142] -------------------------------------------- [ 185.189375][ T1142] ip/1142 is trying to acquire lock: [ 185.189546][ T1142] ffffffff8b9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 185.189888][ T1142] [ 185.189888][ T1142] but task is already holding lock: [ 185.190143][ T1142] ffffffff8b9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 185.190497][ T1142] [ 185.190497][ T1142] other info that might help us debug this: [ 185.190755][ T1142] Possible unsafe locking scenario: [ 185.190755][ T1142] [ 185.191013][ T1142] CPU0 [ 185.191154][ T1142] ---- [ 185.191288][ T1142] lock((netdev_chain).rwsem); [ 185.191482][ T1142] lock((netdev_chain).rwsem); [ 185.191665][ T1142] [ 185.191665][ T1142] *** DEADLOCK *** [ 185.191665][ T1142] [ 185.191932][ T1142] May be due to missing lock nesting notation [ 185.191932][ T1142] [ 185.192198][ T1142] 2 locks held by ip/1142: [ 185.192379][ T1142] #0: ffffffff8b9e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 185.192712][ T1142] #1: ffffffff8b9d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 185.193076][ T1142] [ 185.193076][ T1142] stack backtrace: [ 185.193293][ T1142] CPU: 0 UID: 0 PID: 1142 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 185.193560][ T1142] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 185.193779][ T1142] Call Trace: [ 185.193917][ T1142] [ 185.194011][ T1142] dump_stack_lvl+0x82/0xd0 [ 185.194198][ T1142] print_deadlock_bug+0x40a/0x650 [ 185.194382][ T1142] validate_chain+0x5bf/0xae0 [ 185.194559][ T1142] ? __pfx_validate_chain+0x10/0x10 [ 185.194748][ T1142] ? hlock_class+0x4e/0x130 [ 185.194926][ T1142] ? mark_lock+0x38/0x3e0 [ 185.195062][ T1142] __lock_acquire+0xb9a/0x1680 [ 185.195239][ T1142] lock_acquire.part.0+0xeb/0x330 [ 185.195403][ T1142] ? blocking_notifier_call_chain+0x50/0x90 [ 185.195601][ T1142] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 185.195811][ T1142] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 185.195972][ T1142] ? trace_lock_acquire+0x14c/0x1f0 [ 185.196139][ T1142] ? lock_acquire+0x32/0xc0 [ 185.196303][ T1142] ? blocking_notifier_call_chain+0x50/0x90 [ 185.196510][ T1142] down_read+0x9f/0x340 [ 185.196635][ T1142] ? blocking_notifier_call_chain+0x50/0x90 [ 185.196835][ T1142] ? __pfx_down_read+0x10/0x10 [ 185.197016][ T1142] ? __lock_release+0x103/0x460 [ 185.197183][ T1142] ? netconsole_netdev_event+0x2c1/0x620 [ 185.197345][ T1142] ? __pfx___lock_release+0x10/0x10 [ 185.197505][ T1142] blocking_notifier_call_chain+0x50/0x90 [ 185.197665][ T1142] __netdev_upper_dev_unlink+0xd9/0x220 [ 185.197828][ T1142] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 185.198031][ T1142] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 185.198210][ T1142] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 185.198408][ T1142] ? rtnl_is_locked+0x15/0x20 [ 185.198571][ T1142] netdev_upper_dev_unlink+0x71/0xa0 [ 185.198731][ T1142] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 185.198927][ T1142] ? netconsole_netdev_event+0x2c1/0x620 [ 185.199092][ T1142] ? mutex_is_locked+0x1c/0x60 [ 185.199273][ T1142] ? rtnl_is_locked+0x15/0x20 [ 185.199436][ T1142] ? netdev_master_upper_dev_get+0x13/0x120 [ 185.199633][ T1142] vrf_device_event+0x78/0xe0 [vrf] [ 185.199800][ T1142] notifier_call_chain+0xcd/0x150 [ 185.199965][ T1142] blocking_notifier_call_chain+0x66/0x90 [ 185.200129][ T1142] unregister_netdevice_many_notify+0xa7b/0x1580 [ 185.200331][ T1142] ? hlock_class+0x4e/0x130 [ 185.200493][ T1142] ? mark_lock+0x38/0x3e0 [ 185.200617][ T1142] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 185.200835][ T1142] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 185.201053][ T1142] ? kfree+0xf3/0x330 [ 185.201190][ T1142] ? vlan_vid_del+0x310/0x5e0 [ 185.201372][ T1142] ? vlan_vid_del+0x310/0x5e0 [ 185.201547][ T1142] rtnl_dellink+0x348/0xa40 [ 185.201729][ T1142] ? __pfx_rtnl_dellink+0x10/0x10 [ 185.201920][ T1142] ? find_held_lock+0x2c/0x110 [ 185.202107][ T1142] ? __lock_release+0x103/0x460 [ 185.202285][ T1142] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 185.202459][ T1142] ? __pfx___lock_release+0x10/0x10 [ 185.202635][ T1142] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 185.202812][ T1142] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 185.202990][ T1142] ? __pfx_rtnl_dellink+0x10/0x10 [ 185.203164][ T1142] rtnetlink_rcv_msg+0x712/0xc10 [ 185.203342][ T1142] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 185.203517][ T1142] ? hlock_class+0x4e/0x130 [ 185.203689][ T1142] ? mark_lock+0x38/0x3e0 [ 185.203825][ T1142] ? __lock_acquire+0xb9a/0x1680 [ 185.204000][ T1142] netlink_rcv_skb+0x130/0x360 [ 185.204182][ T1142] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 185.204369][ T1142] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 185.204545][ T1142] ? netlink_deliver_tap+0x13e/0x340 [ 185.204733][ T1142] ? netlink_deliver_tap+0xc3/0x340 [ 185.204915][ T1142] netlink_unicast+0x44b/0x710 [ 185.205098][ T1142] ? __pfx_netlink_unicast+0x10/0x10 [ 185.205277][ T1142] ? find_held_lock+0x2c/0x110 [ 185.205468][ T1142] netlink_sendmsg+0x723/0xbe0 [ 185.205650][ T1142] ? __pfx_netlink_sendmsg+0x10/0x10 [ 185.205829][ T1142] ____sys_sendmsg+0x7ac/0xa10 [ 185.206009][ T1142] ? __pfx_____sys_sendmsg+0x10/0x10 [ 185.206186][ T1142] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 185.206391][ T1142] ___sys_sendmsg+0xee/0x170 [ 185.206552][ T1142] ? __pfx____sys_sendmsg+0x10/0x10 [ 185.206720][ T1142] ? kasan_save_stack+0x34/0x50 [ 185.206899][ T1142] ? kasan_save_stack+0x24/0x50 [ 185.207063][ T1142] ? __kasan_record_aux_stack+0x8e/0xa0 [ 185.207227][ T1142] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 185.207450][ T1142] ? __x64_sys_close+0x7c/0xd0 [ 185.207613][ T1142] ? do_syscall_64+0xc1/0x1d0 [ 185.207779][ T1142] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 185.207983][ T1142] ? __lock_acquire+0xb9a/0x1680 [ 185.208155][ T1142] ? find_held_lock+0x2c/0x110 [ 185.208320][ T1142] ? __lock_release+0x103/0x460 [ 185.208482][ T1142] ? __virt_addr_valid+0x22b/0x430 [ 185.208646][ T1142] ? __pfx___lock_release+0x10/0x10 [ 185.208807][ T1142] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 185.208971][ T1142] __sys_sendmsg+0x109/0x1a0 [ 185.209135][ T1142] ? __pfx___sys_sendmsg+0x10/0x10 [ 185.209303][ T1142] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 185.209524][ T1142] do_syscall_64+0xc1/0x1d0 [ 185.209702][ T1142] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 185.209921][ T1142] RIP: 0033:0x7fef9adad9a7 [ 185.210106][ T1142] 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 [ 185.210734][ T1142] RSP: 002b:00007ffd1d27b3e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 185.211002][ T1142] RAX: ffffffffffffffda RBX: 00007ffd1d27bb10 RCX: 00007fef9adad9a7 [ 185.211269][ T1142] RDX: 0000000000000000 RSI: 00007ffd1d27b450 RDI: 0000000000000005 [ 185.211533][ T1142] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 185.211806][ T1142] R10: 00007fef9ac6bef8 R11: 0000000000000246 R12: 0000000000000002 [ 185.212075][ T1142] R13: 0000000067795563 R14: 0000000000498600 R15: 0000000000000000 [ 185.212342][ T1142]