[ 18.446772][ T354] 8021q: 802.1Q VLAN Support v1.8 [ 18.920734][ T360] gre: GRE over IPv4 demultiplexor driver [ 18.976328][ T360] ip6_gre: GRE over IPv6 tunneling driver [ 29.180378][ T442] GACT probability NOT on [ 46.730035][ T655] [ 46.730268][ T655] ============================================ [ 46.730462][ T655] WARNING: possible recursive locking detected [ 46.730666][ T655] 6.13.0-rc5-virtme #1 Not tainted [ 46.730824][ T655] -------------------------------------------- [ 46.731002][ T655] ip/655 is trying to acquire lock: [ 46.731148][ T655] ffffffffadbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.731453][ T655] [ 46.731453][ T655] but task is already holding lock: [ 46.731663][ T655] ffffffffadbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.731959][ T655] [ 46.731959][ T655] other info that might help us debug this: [ 46.732171][ T655] Possible unsafe locking scenario: [ 46.732171][ T655] [ 46.732384][ T655] CPU0 [ 46.732495][ T655] ---- [ 46.732605][ T655] lock((netdev_chain).rwsem); [ 46.732755][ T655] lock((netdev_chain).rwsem); [ 46.732905][ T655] [ 46.732905][ T655] *** DEADLOCK *** [ 46.732905][ T655] [ 46.733117][ T655] May be due to missing lock nesting notation [ 46.733117][ T655] [ 46.733330][ T655] 2 locks held by ip/655: [ 46.733454][ T655] #0: ffffffffadbe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 46.733720][ T655] #1: ffffffffadbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.734019][ T655] [ 46.734019][ T655] stack backtrace: [ 46.734200][ T655] CPU: 2 UID: 0 PID: 655 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 46.734421][ T655] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 46.734601][ T655] Call Trace: [ 46.734712][ T655] [ 46.734791][ T655] dump_stack_lvl+0x82/0xd0 [ 46.734952][ T655] print_deadlock_bug+0x40a/0x650 [ 46.735099][ T655] validate_chain+0x5bf/0xae0 [ 46.735245][ T655] ? __pfx_validate_chain+0x10/0x10 [ 46.735394][ T655] ? hlock_class+0x4e/0x130 [ 46.735539][ T655] ? mark_lock+0x38/0x3e0 [ 46.735650][ T655] __lock_acquire+0xb9a/0x1680 [ 46.735798][ T655] lock_acquire.part.0+0xeb/0x330 [ 46.735942][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 46.736133][ T655] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 46.736332][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.736478][ T655] ? trace_lock_acquire+0x14c/0x1f0 [ 46.736623][ T655] ? lock_acquire+0x32/0xc0 [ 46.736767][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 46.736946][ T655] down_read+0x9f/0x340 [ 46.737061][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 46.737241][ T655] ? __pfx_down_read+0x10/0x10 [ 46.737386][ T655] ? __lock_release+0x103/0x460 [ 46.737532][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 46.737683][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.737828][ T655] blocking_notifier_call_chain+0x50/0x90 [ 46.737974][ T655] __netdev_upper_dev_unlink+0xd9/0x220 [ 46.738126][ T655] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 46.738306][ T655] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 46.738452][ T655] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 46.738632][ T655] ? rtnl_is_locked+0x15/0x20 [ 46.738778][ T655] netdev_upper_dev_unlink+0x71/0xa0 [ 46.738921][ T655] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 46.739100][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 46.739246][ T655] ? mutex_is_locked+0x1c/0x60 [ 46.739393][ T655] ? rtnl_is_locked+0x15/0x20 [ 46.739536][ T655] ? netdev_master_upper_dev_get+0x13/0x120 [ 46.739716][ T655] vrf_device_event+0x78/0xe0 [vrf] [ 46.739863][ T655] notifier_call_chain+0xcd/0x150 [ 46.740007][ T655] blocking_notifier_call_chain+0x66/0x90 [ 46.740153][ T655] unregister_netdevice_many_notify+0xa7b/0x1580 [ 46.740341][ T655] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 46.740520][ T655] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 46.740682][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.740829][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.740974][ T655] ? rtnl_is_locked+0x15/0x20 [ 46.741122][ T655] ? unregister_netdevice_queue+0x70/0x410 [ 46.741309][ T655] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 46.741490][ T655] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 46.741639][ T655] rtnl_dellink+0x348/0xa40 [ 46.741786][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.741951][ T655] ? find_held_lock+0x2c/0x110 [ 46.742100][ T655] ? __lock_release+0x103/0x460 [ 46.742252][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.742399][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.742545][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.742691][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.742838][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.742983][ T655] rtnetlink_rcv_msg+0x712/0xc10 [ 46.743130][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.743273][ T655] ? hlock_class+0x4e/0x130 [ 46.743424][ T655] ? mark_lock+0x38/0x3e0 [ 46.743536][ T655] ? __lock_acquire+0xb9a/0x1680 [ 46.743685][ T655] netlink_rcv_skb+0x130/0x360 [ 46.743828][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.743972][ T655] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 46.744119][ T655] ? netlink_deliver_tap+0x13e/0x340 [ 46.744266][ T655] ? netlink_deliver_tap+0xc3/0x340 [ 46.744422][ T655] netlink_unicast+0x44b/0x710 [ 46.744568][ T655] ? __pfx_netlink_unicast+0x10/0x10 [ 46.744712][ T655] ? find_held_lock+0x2c/0x110 [ 46.744861][ T655] netlink_sendmsg+0x723/0xbe0 [ 46.745007][ T655] ? __pfx_netlink_sendmsg+0x10/0x10 [ 46.745154][ T655] ____sys_sendmsg+0x7ac/0xa10 [ 46.745300][ T655] ? __pfx_____sys_sendmsg+0x10/0x10 [ 46.745451][ T655] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 46.745635][ T655] ___sys_sendmsg+0xee/0x170 [ 46.745779][ T655] ? __pfx____sys_sendmsg+0x10/0x10 [ 46.745923][ T655] ? kasan_save_stack+0x34/0x50 [ 46.746073][ T655] ? kasan_save_stack+0x24/0x50 [ 46.746218][ T655] ? __kasan_record_aux_stack+0x8e/0xa0 [ 46.746669][ T655] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 46.746861][ T655] ? __x64_sys_close+0x7c/0xd0 [ 46.747008][ T655] ? do_syscall_64+0xc1/0x1d0 [ 46.747152][ T655] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.747335][ T655] ? __lock_acquire+0xb9a/0x1680 [ 46.747483][ T655] ? find_held_lock+0x2c/0x110 [ 46.747631][ T655] ? __lock_release+0x103/0x460 [ 46.747776][ T655] ? __virt_addr_valid+0x22b/0x430 [ 46.747923][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.748074][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.748222][ T655] __sys_sendmsg+0x109/0x1a0 [ 46.748368][ T655] ? __pfx___sys_sendmsg+0x10/0x10 [ 46.748514][ T655] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 46.748702][ T655] do_syscall_64+0xc1/0x1d0 [ 46.748848][ T655] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.749027][ T655] RIP: 0033:0x7f3a1796f9a7 [ 46.749187][ T655] 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 [ 46.749696][ T655] RSP: 002b:00007ffcee074188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.749928][ T655] RAX: ffffffffffffffda RBX: 00007ffcee0748b0 RCX: 00007f3a1796f9a7 [ 46.750149][ T655] RDX: 0000000000000000 RSI: 00007ffcee0741f0 RDI: 0000000000000005 [ 46.750369][ T655] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 46.750610][ T655] R10: 00007f3a1782def8 R11: 0000000000000246 R12: 0000000000000002 [ 46.750837][ T655] R13: 00000000677953f0 R14: 0000000000498600 R15: 0000000000000000 [ 46.751074][ T655] [ 46.782293][ T655] ip (655) used greatest stack depth: 23504 bytes left