[ 11.522889][ T259] ip (259) used greatest stack depth: 23296 bytes left [ 16.250860][ T334] 8021q: 802.1Q VLAN Support v1.8 [ 16.661604][ T340] gre: GRE over IPv4 demultiplexor driver [ 16.687759][ T340] ip_gre: GRE over IPv4 tunneling driver [ 30.053836][ T442] [ 30.054074][ T442] ============================================ [ 30.054271][ T442] WARNING: possible recursive locking detected [ 30.054459][ T442] 6.13.0-rc5-virtme #1 Not tainted [ 30.054608][ T442] -------------------------------------------- [ 30.054786][ T442] ip/442 is trying to acquire lock: [ 30.054931][ T442] ffffffffbc1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.055239][ T442] [ 30.055239][ T442] but task is already holding lock: [ 30.055450][ T442] ffffffffbc1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.055754][ T442] [ 30.055754][ T442] other info that might help us debug this: [ 30.055978][ T442] Possible unsafe locking scenario: [ 30.055978][ T442] [ 30.056196][ T442] CPU0 [ 30.056308][ T442] ---- [ 30.056418][ T442] lock((netdev_chain).rwsem); [ 30.056563][ T442] lock((netdev_chain).rwsem); [ 30.056715][ T442] [ 30.056715][ T442] *** DEADLOCK *** [ 30.056715][ T442] [ 30.056943][ T442] May be due to missing lock nesting notation [ 30.056943][ T442] [ 30.057155][ T442] 2 locks held by ip/442: [ 30.057272][ T442] #0: ffffffffbc1e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 30.057546][ T442] #1: ffffffffbc1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 30.057839][ T442] [ 30.057839][ T442] stack backtrace: [ 30.058016][ T442] CPU: 0 UID: 0 PID: 442 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 30.058232][ T442] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.058419][ T442] Call Trace: [ 30.058529][ T442] [ 30.058607][ T442] dump_stack_lvl+0x82/0xd0 [ 30.058763][ T442] print_deadlock_bug+0x40a/0x650 [ 30.058911][ T442] validate_chain+0x5bf/0xae0 [ 30.059057][ T442] ? __pfx_validate_chain+0x10/0x10 [ 30.059205][ T442] ? hlock_class+0x4e/0x130 [ 30.059352][ T442] ? mark_lock+0x38/0x3e0 [ 30.059468][ T442] __lock_acquire+0xb9a/0x1680 [ 30.059615][ T442] lock_acquire.part.0+0xeb/0x330 [ 30.059761][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 30.059943][ T442] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 30.060128][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.060272][ T442] ? trace_lock_acquire+0x14c/0x1f0 [ 30.060418][ T442] ? lock_acquire+0x32/0xc0 [ 30.060569][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 30.060748][ T442] down_read+0x9f/0x340 [ 30.060860][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 30.061041][ T442] ? __pfx_down_read+0x10/0x10 [ 30.061187][ T442] ? __lock_release+0x103/0x460 [ 30.061363][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 30.061509][ T442] ? __pfx___lock_release+0x10/0x10 [ 30.061672][ T442] blocking_notifier_call_chain+0x50/0x90 [ 30.061832][ T442] __netdev_upper_dev_unlink+0xd9/0x220 [ 30.061978][ T442] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 30.062158][ T442] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 30.062306][ T442] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 30.062485][ T442] ? rtnl_is_locked+0x15/0x20 [ 30.062636][ T442] netdev_upper_dev_unlink+0x71/0xa0 [ 30.062801][ T442] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 30.062981][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 30.063127][ T442] ? mutex_is_locked+0x1c/0x60 [ 30.063275][ T442] ? rtnl_is_locked+0x15/0x20 [ 30.063423][ T442] ? netdev_master_upper_dev_get+0x13/0x120 [ 30.063606][ T442] vrf_device_event+0x78/0xe0 [vrf] [ 30.063763][ T442] notifier_call_chain+0xcd/0x150 [ 30.063914][ T442] blocking_notifier_call_chain+0x66/0x90 [ 30.064064][ T442] unregister_netdevice_many_notify+0xa7b/0x1580 [ 30.064249][ T442] ? find_held_lock+0x2c/0x110 [ 30.064396][ T442] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 30.064577][ T442] ? __pfx___lock_release+0x10/0x10 [ 30.064733][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.064888][ T442] ? rtnl_is_locked+0x15/0x20 [ 30.065033][ T442] ? unregister_netdevice_queue+0x70/0x410 [ 30.065214][ T442] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 30.065397][ T442] ? net_generic+0xbb/0x1f0 [ 30.065547][ T442] rtnl_dellink+0x348/0xa40 [ 30.065705][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.065877][ T442] ? find_held_lock+0x2c/0x110 [ 30.066030][ T442] ? __lock_release+0x103/0x460 [ 30.066174][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.066319][ T442] ? __pfx___lock_release+0x10/0x10 [ 30.066466][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.066613][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 30.066760][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 30.066905][ T442] rtnetlink_rcv_msg+0x712/0xc10 [ 30.067060][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.067204][ T442] ? hlock_class+0x4e/0x130 [ 30.067350][ T442] ? mark_lock+0x38/0x3e0 [ 30.067463][ T442] ? __lock_acquire+0xb9a/0x1680 [ 30.067611][ T442] netlink_rcv_skb+0x130/0x360 [ 30.067761][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 30.067908][ T442] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 30.068056][ T442] ? netlink_deliver_tap+0x13e/0x340 [ 30.068212][ T442] ? netlink_deliver_tap+0xc3/0x340 [ 30.068359][ T442] netlink_unicast+0x44b/0x710 [ 30.068518][ T442] ? __pfx_netlink_unicast+0x10/0x10 [ 30.068673][ T442] ? find_held_lock+0x2c/0x110 [ 30.068827][ T442] netlink_sendmsg+0x723/0xbe0 [ 30.068987][ T442] ? __pfx_netlink_sendmsg+0x10/0x10 [ 30.069151][ T442] ____sys_sendmsg+0x7ac/0xa10 [ 30.069324][ T442] ? __pfx_____sys_sendmsg+0x10/0x10 [ 30.069489][ T442] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 30.069697][ T442] ___sys_sendmsg+0xee/0x170 [ 30.069860][ T442] ? __pfx____sys_sendmsg+0x10/0x10 [ 30.070025][ T442] ? kasan_save_stack+0x34/0x50 [ 30.070184][ T442] ? kasan_save_stack+0x24/0x50 [ 30.070331][ T442] ? __kasan_record_aux_stack+0x8e/0xa0 [ 30.070483][ T442] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 30.070673][ T442] ? __x64_sys_close+0x7c/0xd0 [ 30.070821][ T442] ? do_syscall_64+0xc1/0x1d0 [ 30.070967][ T442] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.071153][ T442] ? __lock_acquire+0xb9a/0x1680 [ 30.071301][ T442] ? find_held_lock+0x2c/0x110 [ 30.071448][ T442] ? __lock_release+0x103/0x460 [ 30.071600][ T442] ? __virt_addr_valid+0x22b/0x430 [ 30.071752][ T442] ? __pfx___lock_release+0x10/0x10 [ 30.071898][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.072043][ T442] __sys_sendmsg+0x109/0x1a0 [ 30.072189][ T442] ? __pfx___sys_sendmsg+0x10/0x10 [ 30.072337][ T442] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 30.072529][ T442] do_syscall_64+0xc1/0x1d0 [ 30.072696][ T442] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.072885][ T442] RIP: 0033:0x7fb5b60a79a7 [ 30.073047][ T442] 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 [ 30.073569][ T442] RSP: 002b:00007ffd9f1fc358 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 30.073795][ T442] RAX: ffffffffffffffda RBX: 00007ffd9f1fca80 RCX: 00007fb5b60a79a7 [ 30.074026][ T442] RDX: 0000000000000000 RSI: 00007ffd9f1fc3c0 RDI: 0000000000000005 [ 30.074259][ T442] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 30.074485][ T442] R10: 00007fb5b5f65ef8 R11: 0000000000000246 R12: 0000000000000002 [ 30.074719][ T442] R13: 00000000677904dc R14: 0000000000498600 R15: 0000000000000000 [ 30.074943][ T442]