[ 15.254557][ T309] 8021q: 802.1Q VLAN Support v1.8 [ 16.073482][ T321] gre: GRE over IPv4 demultiplexor driver [ 16.087910][ T321] ip_gre: GRE over IPv4 tunneling driver [ 21.051709][ T388] GACT probability NOT on [ 86.625208][ T681] [ 86.625410][ T681] ============================================ [ 86.625644][ T681] WARNING: possible recursive locking detected [ 86.625880][ T681] 6.13.0-rc5-virtme #1 Not tainted [ 86.626061][ T681] -------------------------------------------- [ 86.626284][ T681] ip/681 is trying to acquire lock: [ 86.626458][ T681] ffffffffbbfd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.626847][ T681] [ 86.626847][ T681] but task is already holding lock: [ 86.627077][ T681] ffffffffbbfd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.627425][ T681] [ 86.627425][ T681] other info that might help us debug this: [ 86.627663][ T681] Possible unsafe locking scenario: [ 86.627663][ T681] [ 86.627903][ T681] CPU0 [ 86.628026][ T681] ---- [ 86.628135][ T681] lock((netdev_chain).rwsem); [ 86.628307][ T681] lock((netdev_chain).rwsem); [ 86.628455][ T681] [ 86.628455][ T681] *** DEADLOCK *** [ 86.628455][ T681] [ 86.628691][ T681] May be due to missing lock nesting notation [ 86.628691][ T681] [ 86.628917][ T681] 2 locks held by ip/681: [ 86.629048][ T681] #0: ffffffffbbfe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 86.629360][ T681] #1: ffffffffbbfd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 86.629717][ T681] [ 86.629717][ T681] stack backtrace: [ 86.629920][ T681] CPU: 3 UID: 0 PID: 681 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 86.630177][ T681] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 86.630384][ T681] Call Trace: [ 86.630502][ T681] [ 86.630591][ T681] dump_stack_lvl+0x82/0xd0 [ 86.630763][ T681] print_deadlock_bug+0x40a/0x650 [ 86.630917][ T681] validate_chain+0x5bf/0xae0 [ 86.631089][ T681] ? __pfx_validate_chain+0x10/0x10 [ 86.631253][ T681] ? hlock_class+0x4e/0x130 [ 86.631440][ T681] ? mark_lock+0x38/0x3e0 [ 86.631570][ T681] __lock_acquire+0xb9a/0x1680 [ 86.631748][ T681] lock_acquire.part.0+0xeb/0x330 [ 86.631917][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 86.632126][ T681] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 86.632359][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.632538][ T681] ? trace_lock_acquire+0x14c/0x1f0 [ 86.632702][ T681] ? lock_acquire+0x32/0xc0 [ 86.632871][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 86.633062][ T681] down_read+0x9f/0x340 [ 86.633185][ T681] ? blocking_notifier_call_chain+0x50/0x90 [ 86.633408][ T681] ? __pfx_down_read+0x10/0x10 [ 86.633588][ T681] ? __lock_release+0x103/0x460 [ 86.633756][ T681] ? netconsole_netdev_event+0x2c1/0x620 [ 86.633940][ T681] ? __pfx___lock_release+0x10/0x10 [ 86.634114][ T681] blocking_notifier_call_chain+0x50/0x90 [ 86.634296][ T681] __netdev_upper_dev_unlink+0xd9/0x220 [ 86.634510][ T681] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 86.634719][ T681] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 86.634931][ T681] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 86.635169][ T681] ? rtnl_is_locked+0x15/0x20 [ 86.635343][ T681] netdev_upper_dev_unlink+0x71/0xa0 [ 86.635511][ T681] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 86.635756][ T681] ? netconsole_netdev_event+0x2c1/0x620 [ 86.635923][ T681] ? mutex_is_locked+0x1c/0x60 [ 86.636089][ T681] ? rtnl_is_locked+0x15/0x20 [ 86.636245][ T681] ? netdev_master_upper_dev_get+0x13/0x120 [ 86.636455][ T681] vrf_device_event+0x78/0xe0 [vrf] [ 86.636613][ T681] notifier_call_chain+0xcd/0x150 [ 86.636791][ T681] blocking_notifier_call_chain+0x66/0x90 [ 86.636950][ T681] unregister_netdevice_many_notify+0xa7b/0x1580 [ 86.637138][ T681] ? hlock_class+0x4e/0x130 [ 86.637289][ T681] ? mark_lock+0x38/0x3e0 [ 86.637405][ T681] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 86.637597][ T681] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 86.637793][ T681] ? kfree+0xf3/0x330 [ 86.637920][ T681] ? vlan_vid_del+0x310/0x5e0 [ 86.638099][ T681] ? vlan_vid_del+0x310/0x5e0 [ 86.638265][ T681] rtnl_dellink+0x348/0xa40 [ 86.638428][ T681] ? __pfx_rtnl_dellink+0x10/0x10 [ 86.638627][ T681] ? find_held_lock+0x2c/0x110 [ 86.638784][ T681] ? __lock_release+0x103/0x460 [ 86.638939][ T681] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 86.639098][ T681] ? __pfx___lock_release+0x10/0x10 [ 86.639260][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.639419][ T681] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 86.639576][ T681] ? __pfx_rtnl_dellink+0x10/0x10 [ 86.639741][ T681] rtnetlink_rcv_msg+0x712/0xc10 [ 86.639900][ T681] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 86.640056][ T681] ? hlock_class+0x4e/0x130 [ 86.640224][ T681] ? mark_lock+0x38/0x3e0 [ 86.640360][ T681] ? __lock_acquire+0xb9a/0x1680 [ 86.640532][ T681] netlink_rcv_skb+0x130/0x360 [ 86.640697][ T681] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 86.640882][ T681] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 86.641065][ T681] ? netlink_deliver_tap+0x13e/0x340 [ 86.641237][ T681] ? netlink_deliver_tap+0xc3/0x340 [ 86.641409][ T681] netlink_unicast+0x44b/0x710 [ 86.641577][ T681] ? __pfx_netlink_unicast+0x10/0x10 [ 86.641740][ T681] ? find_held_lock+0x2c/0x110 [ 86.641916][ T681] netlink_sendmsg+0x723/0xbe0 [ 86.642085][ T681] ? __pfx_netlink_sendmsg+0x10/0x10 [ 86.642241][ T681] ____sys_sendmsg+0x7ac/0xa10 [ 86.642393][ T681] ? __pfx_____sys_sendmsg+0x10/0x10 [ 86.642588][ T681] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 86.642807][ T681] ___sys_sendmsg+0xee/0x170 [ 86.642981][ T681] ? __pfx____sys_sendmsg+0x10/0x10 [ 86.643164][ T681] ? kasan_save_stack+0x34/0x50 [ 86.643345][ T681] ? kasan_save_stack+0x24/0x50 [ 86.643518][ T681] ? __kasan_record_aux_stack+0x8e/0xa0 [ 86.643733][ T681] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 86.643963][ T681] ? __x64_sys_close+0x7c/0xd0 [ 86.644132][ T681] ? do_syscall_64+0xc1/0x1d0 [ 86.644323][ T681] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.644559][ T681] ? __lock_acquire+0xb9a/0x1680 [ 86.644749][ T681] ? find_held_lock+0x2c/0x110 [ 86.644919][ T681] ? __lock_release+0x103/0x460 [ 86.645074][ T681] ? __virt_addr_valid+0x22b/0x430 [ 86.645283][ T681] ? __pfx___lock_release+0x10/0x10 [ 86.645450][ T681] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 86.645608][ T681] __sys_sendmsg+0x109/0x1a0 [ 86.645770][ T681] ? __pfx___sys_sendmsg+0x10/0x10 [ 86.645931][ T681] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 86.646150][ T681] do_syscall_64+0xc1/0x1d0 [ 86.646311][ T681] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 86.646513][ T681] RIP: 0033:0x7f06c79049a7 [ 86.646676][ 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 [ 86.647222][ T681] RSP: 002b:00007ffe967023e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 86.647462][ T681] RAX: ffffffffffffffda RBX: 00007ffe96702b10 RCX: 00007f06c79049a7 [ 86.647695][ T681] RDX: 0000000000000000 RSI: 00007ffe96702450 RDI: 0000000000000005 [ 86.647943][ T681] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 86.648214][ T681] R10: 00007f06c77c2ef8 R11: 0000000000000246 R12: 0000000000000002 [ 86.648446][ T681] R13: 0000000067792a67 R14: 0000000000498600 R15: 0000000000000000 [ 86.648707][ T681]