[ 46.147226][ T666] 8021q: 802.1Q VLAN Support v1.8 [ 46.489644][ T671] gre: GRE over IPv4 demultiplexor driver [ 46.503312][ T671] ip_gre: GRE over IPv4 tunneling driver [ 64.279327][ T772] [ 64.279566][ T772] ============================================ [ 64.279759][ T772] WARNING: possible recursive locking detected [ 64.279967][ T772] 6.13.0-rc5-virtme #1 Not tainted [ 64.280133][ T772] -------------------------------------------- [ 64.280324][ T772] ip/772 is trying to acquire lock: [ 64.280481][ T772] ffffffff967d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 64.280795][ T772] [ 64.280795][ T772] but task is already holding lock: [ 64.281022][ T772] ffffffff967d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 64.281338][ T772] [ 64.281338][ T772] other info that might help us debug this: [ 64.281568][ T772] Possible unsafe locking scenario: [ 64.281568][ T772] [ 64.281795][ T772] CPU0 [ 64.281918][ T772] ---- [ 64.282036][ T772] lock((netdev_chain).rwsem); [ 64.282196][ T772] lock((netdev_chain).rwsem); [ 64.282351][ T772] [ 64.282351][ T772] *** DEADLOCK *** [ 64.282351][ T772] [ 64.282580][ T772] May be due to missing lock nesting notation [ 64.282580][ T772] [ 64.282831][ T772] 2 locks held by ip/772: [ 64.282958][ T772] #0: ffffffff967e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 64.283257][ T772] #1: ffffffff967d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 64.283580][ T772] [ 64.283580][ T772] stack backtrace: [ 64.283784][ T772] CPU: 2 UID: 0 PID: 772 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 64.284016][ T772] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 64.284218][ T772] Call Trace: [ 64.284348][ T772] [ 64.284427][ T772] dump_stack_lvl+0x82/0xd0 [ 64.284599][ T772] print_deadlock_bug+0x40a/0x650 [ 64.284771][ T772] validate_chain+0x5bf/0xae0 [ 64.284930][ T772] ? __pfx_validate_chain+0x10/0x10 [ 64.285093][ T772] ? hlock_class+0x4e/0x130 [ 64.285253][ T772] ? mark_lock+0x38/0x3e0 [ 64.285374][ T772] __lock_acquire+0xb9a/0x1680 [ 64.285537][ T772] lock_acquire.part.0+0xeb/0x330 [ 64.285694][ T772] ? blocking_notifier_call_chain+0x50/0x90 [ 64.285894][ T772] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 64.286088][ T772] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 64.286236][ T772] ? trace_lock_acquire+0x14c/0x1f0 [ 64.286386][ T772] ? lock_acquire+0x32/0xc0 [ 64.286533][ T772] ? blocking_notifier_call_chain+0x50/0x90 [ 64.286735][ T772] down_read+0x9f/0x340 [ 64.286852][ T772] ? blocking_notifier_call_chain+0x50/0x90 [ 64.287056][ T772] ? __pfx_down_read+0x10/0x10 [ 64.287221][ T772] ? __lock_release+0x103/0x460 [ 64.287380][ T772] ? netconsole_netdev_event+0x2c1/0x620 [ 64.287538][ T772] ? __pfx___lock_release+0x10/0x10 [ 64.287693][ T772] blocking_notifier_call_chain+0x50/0x90 [ 64.287854][ T772] __netdev_upper_dev_unlink+0xd9/0x220 [ 64.288004][ T772] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 64.288223][ T772] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 64.288374][ T772] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 64.288556][ T772] ? rtnl_is_locked+0x15/0x20 [ 64.288714][ T772] netdev_upper_dev_unlink+0x71/0xa0 [ 64.288878][ T772] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 64.289072][ T772] ? netconsole_netdev_event+0x2c1/0x620 [ 64.289231][ T772] ? mutex_is_locked+0x1c/0x60 [ 64.289425][ T772] ? rtnl_is_locked+0x15/0x20 [ 64.289585][ T772] ? netdev_master_upper_dev_get+0x13/0x120 [ 64.289775][ T772] vrf_device_event+0x78/0xe0 [vrf] [ 64.289927][ T772] notifier_call_chain+0xcd/0x150 [ 64.290090][ T772] blocking_notifier_call_chain+0x66/0x90 [ 64.290241][ T772] unregister_netdevice_many_notify+0xa7b/0x1580 [ 64.290434][ T772] ? __lock_release+0x103/0x460 [ 64.290598][ T772] ? __pfx___lock_release+0x10/0x10 [ 64.290750][ T772] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 64.290933][ T772] ? hlock_class+0x4e/0x130 [ 64.291085][ T772] ? mark_held_locks+0x9e/0xe0 [ 64.291255][ T772] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 64.291410][ T772] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 64.291611][ T772] rtnl_dellink+0x348/0xa40 [ 64.291777][ T772] ? __pfx_rtnl_dellink+0x10/0x10 [ 64.291960][ T772] ? find_held_lock+0x2c/0x110 [ 64.292116][ T772] ? __lock_release+0x103/0x460 [ 64.292275][ T772] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 64.292424][ T772] ? __pfx___lock_release+0x10/0x10 [ 64.292571][ T772] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 64.292724][ T772] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 64.292887][ T772] ? __pfx_rtnl_dellink+0x10/0x10 [ 64.293046][ T772] rtnetlink_rcv_msg+0x712/0xc10 [ 64.293198][ T772] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 64.293370][ T772] ? hlock_class+0x4e/0x130 [ 64.293528][ T772] ? mark_lock+0x38/0x3e0 [ 64.293650][ T772] ? __lock_acquire+0xb9a/0x1680 [ 64.293804][ T772] netlink_rcv_skb+0x130/0x360 [ 64.293964][ T772] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 64.294121][ T772] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 64.294273][ T772] ? netlink_deliver_tap+0x13e/0x340 [ 64.294438][ T772] ? netlink_deliver_tap+0xc3/0x340 [ 64.294601][ T772] netlink_unicast+0x44b/0x710 [ 64.294762][ T772] ? __pfx_netlink_unicast+0x10/0x10 [ 64.294923][ T772] ? find_held_lock+0x2c/0x110 [ 64.295094][ T772] netlink_sendmsg+0x723/0xbe0 [ 64.295248][ T772] ? __pfx_netlink_sendmsg+0x10/0x10 [ 64.295411][ T772] ____sys_sendmsg+0x7ac/0xa10 [ 64.295562][ T772] ? __pfx_____sys_sendmsg+0x10/0x10 [ 64.295712][ T772] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 64.295917][ T772] ___sys_sendmsg+0xee/0x170 [ 64.296077][ T772] ? __pfx____sys_sendmsg+0x10/0x10 [ 64.296243][ T772] ? kasan_save_stack+0x34/0x50 [ 64.296405][ T772] ? kasan_save_stack+0x24/0x50 [ 64.296556][ T772] ? __kasan_record_aux_stack+0x8e/0xa0 [ 64.296706][ T772] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 64.296892][ T772] ? __x64_sys_close+0x7c/0xd0 [ 64.297045][ T772] ? do_syscall_64+0xc1/0x1d0 [ 64.297194][ T772] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 64.297378][ T772] ? __lock_acquire+0xb9a/0x1680 [ 64.297545][ T772] ? find_held_lock+0x2c/0x110 [ 64.297694][ T772] ? __lock_release+0x103/0x460 [ 64.297840][ T772] ? __virt_addr_valid+0x22b/0x430 [ 64.297992][ T772] ? __pfx___lock_release+0x10/0x10 [ 64.298150][ T772] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 64.298307][ T772] __sys_sendmsg+0x109/0x1a0 [ 64.298455][ T772] ? __pfx___sys_sendmsg+0x10/0x10 [ 64.298608][ T772] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 64.298808][ T772] do_syscall_64+0xc1/0x1d0 [ 64.298969][ T772] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 64.299155][ T772] RIP: 0033:0x7f61b58e59a7 [ 64.299325][ T772] 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 [ 64.299885][ T772] RSP: 002b:00007fff7e51e7f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 64.300120][ T772] RAX: ffffffffffffffda RBX: 00007fff7e51ef20 RCX: 00007f61b58e59a7 [ 64.300342][ T772] RDX: 0000000000000000 RSI: 00007fff7e51e860 RDI: 0000000000000005 [ 64.300576][ T772] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 64.300814][ T772] R10: 00007f61b57a3ef8 R11: 0000000000000246 R12: 0000000000000002 [ 64.301045][ T772] R13: 0000000067790133 R14: 0000000000498600 R15: 0000000000000000 [ 64.301285][ T772] [ 64.323899][ T772] ip (772) used greatest stack depth: 23624 bytes left