[ 62.028307][ T679] 8021q: 802.1Q VLAN Support v1.8 [ 62.417144][ T684] gre: GRE over IPv4 demultiplexor driver [ 62.469950][ T684] ip6_gre: GRE over IPv6 tunneling driver [ 64.935519][ T714] ip (714) used greatest stack depth: 22944 bytes left [ 72.409333][ T760] GACT probability NOT on [ 90.928056][ T977] [ 90.928210][ T977] ============================================ [ 90.928437][ T977] WARNING: possible recursive locking detected [ 90.928657][ T977] 6.13.0-rc5-virtme #1 Not tainted [ 90.928839][ T977] -------------------------------------------- [ 90.929048][ T977] ip/977 is trying to acquire lock: [ 90.929225][ T977] ffffffff889d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 90.929593][ T977] [ 90.929593][ T977] but task is already holding lock: [ 90.929840][ T977] ffffffff889d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 90.930189][ T977] [ 90.930189][ T977] other info that might help us debug this: [ 90.930437][ T977] Possible unsafe locking scenario: [ 90.930437][ T977] [ 90.930691][ T977] CPU0 [ 90.930818][ T977] ---- [ 90.930942][ T977] lock((netdev_chain).rwsem); [ 90.931116][ T977] lock((netdev_chain).rwsem); [ 90.931292][ T977] [ 90.931292][ T977] *** DEADLOCK *** [ 90.931292][ T977] [ 90.931541][ T977] May be due to missing lock nesting notation [ 90.931541][ T977] [ 90.931785][ T977] 2 locks held by ip/977: [ 90.931919][ T977] #0: ffffffff889e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 90.932233][ T977] #1: ffffffff889d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 90.932572][ T977] [ 90.932572][ T977] stack backtrace: [ 90.932781][ T977] CPU: 1 UID: 0 PID: 977 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 90.933036][ T977] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 90.933283][ T977] Call Trace: [ 90.933412][ T977] [ 90.933501][ T977] dump_stack_lvl+0x82/0xd0 [ 90.933679][ T977] print_deadlock_bug+0x40a/0x650 [ 90.933853][ T977] validate_chain+0x5bf/0xae0 [ 90.934033][ T977] ? __pfx_validate_chain+0x10/0x10 [ 90.934227][ T977] ? hlock_class+0x4e/0x130 [ 90.934396][ T977] ? mark_lock+0x38/0x3e0 [ 90.934535][ T977] __lock_acquire+0xb9a/0x1680 [ 90.934709][ T977] lock_acquire.part.0+0xeb/0x330 [ 90.934879][ T977] ? blocking_notifier_call_chain+0x50/0x90 [ 90.935091][ T977] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 90.935318][ T977] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 90.935487][ T977] ? trace_lock_acquire+0x14c/0x1f0 [ 90.935657][ T977] ? lock_acquire+0x32/0xc0 [ 90.935838][ T977] ? blocking_notifier_call_chain+0x50/0x90 [ 90.936051][ T977] down_read+0x9f/0x340 [ 90.936190][ T977] ? blocking_notifier_call_chain+0x50/0x90 [ 90.936398][ T977] ? __pfx_down_read+0x10/0x10 [ 90.936567][ T977] ? __lock_release+0x103/0x460 [ 90.936738][ T977] ? netconsole_netdev_event+0x2c1/0x620 [ 90.936906][ T977] ? __pfx___lock_release+0x10/0x10 [ 90.937080][ T977] blocking_notifier_call_chain+0x50/0x90 [ 90.937255][ T977] __netdev_upper_dev_unlink+0xd9/0x220 [ 90.937427][ T977] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 90.937636][ T977] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 90.937806][ T977] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 90.938026][ T977] ? rtnl_is_locked+0x15/0x20 [ 90.938209][ T977] netdev_upper_dev_unlink+0x71/0xa0 [ 90.938380][ T977] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 90.938589][ T977] ? netconsole_netdev_event+0x2c1/0x620 [ 90.938762][ T977] ? mutex_is_locked+0x1c/0x60 [ 90.938934][ T977] ? rtnl_is_locked+0x15/0x20 [ 90.939104][ T977] ? netdev_master_upper_dev_get+0x13/0x120 [ 90.939318][ T977] vrf_device_event+0x78/0xe0 [vrf] [ 90.939498][ T977] notifier_call_chain+0xcd/0x150 [ 90.939670][ T977] blocking_notifier_call_chain+0x66/0x90 [ 90.939839][ T977] unregister_netdevice_many_notify+0xa7b/0x1580 [ 90.940050][ T977] ? __lock_release+0x103/0x460 [ 90.940229][ T977] ? __pfx___lock_release+0x10/0x10 [ 90.940399][ T977] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 90.940608][ T977] ? hlock_class+0x4e/0x130 [ 90.940785][ T977] ? mark_held_locks+0x9e/0xe0 [ 90.940955][ T977] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 90.941127][ T977] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 90.941344][ T977] rtnl_dellink+0x348/0xa40 [ 90.941521][ T977] ? __pfx_rtnl_dellink+0x10/0x10 [ 90.941706][ T977] ? find_held_lock+0x2c/0x110 [ 90.941878][ T977] ? __lock_release+0x103/0x460 [ 90.942053][ T977] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 90.942237][ T977] ? __pfx___lock_release+0x10/0x10 [ 90.942404][ T977] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 90.942574][ T977] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 90.942740][ T977] ? __pfx_rtnl_dellink+0x10/0x10 [ 90.942911][ T977] rtnetlink_rcv_msg+0x712/0xc10 [ 90.943084][ T977] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 90.943266][ T977] ? hlock_class+0x4e/0x130 [ 90.943435][ T977] ? mark_lock+0x38/0x3e0 [ 90.943566][ T977] ? __lock_acquire+0xb9a/0x1680 [ 90.943734][ T977] netlink_rcv_skb+0x130/0x360 [ 90.943906][ T977] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 90.944091][ T977] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 90.944275][ T977] ? netlink_deliver_tap+0x13e/0x340 [ 90.944455][ T977] ? netlink_deliver_tap+0xc3/0x340 [ 90.944627][ T977] netlink_unicast+0x44b/0x710 [ 90.944796][ T977] ? __pfx_netlink_unicast+0x10/0x10 [ 90.944966][ T977] ? find_held_lock+0x2c/0x110 [ 90.945143][ T977] netlink_sendmsg+0x723/0xbe0 [ 90.945319][ T977] ? __pfx_netlink_sendmsg+0x10/0x10 [ 90.945489][ T977] ____sys_sendmsg+0x7ac/0xa10 [ 90.945669][ T977] ? __pfx_____sys_sendmsg+0x10/0x10 [ 90.945846][ T977] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 90.946063][ T977] ___sys_sendmsg+0xee/0x170 [ 90.946246][ T977] ? __pfx____sys_sendmsg+0x10/0x10 [ 90.946418][ T977] ? kasan_save_stack+0x34/0x50 [ 90.946588][ T977] ? kasan_save_stack+0x24/0x50 [ 90.946758][ T977] ? __kasan_record_aux_stack+0x8e/0xa0 [ 90.946931][ T977] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 90.947159][ T977] ? __x64_sys_close+0x7c/0xd0 [ 90.947335][ T977] ? do_syscall_64+0xc1/0x1d0 [ 90.947502][ T977] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 90.947716][ T977] ? __lock_acquire+0xb9a/0x1680 [ 90.947888][ T977] ? find_held_lock+0x2c/0x110 [ 90.948056][ T977] ? __lock_release+0x103/0x460 [ 90.948223][ T977] ? __virt_addr_valid+0x22b/0x430 [ 90.948407][ T977] ? __pfx___lock_release+0x10/0x10 [ 90.948578][ T977] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 90.948751][ T977] __sys_sendmsg+0x109/0x1a0 [ 90.948924][ T977] ? __pfx___sys_sendmsg+0x10/0x10 [ 90.949095][ T977] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 90.949310][ T977] do_syscall_64+0xc1/0x1d0 [ 90.949476][ T977] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 90.949695][ T977] RIP: 0033:0x7fd9607d99a7 [ 90.949880][ T977] 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 [ 90.950477][ T977] RSP: 002b:00007ffd1db47aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 90.950746][ T977] RAX: ffffffffffffffda RBX: 00007ffd1db481d0 RCX: 00007fd9607d99a7 [ 90.951002][ T977] RDX: 0000000000000000 RSI: 00007ffd1db47b10 RDI: 0000000000000005 [ 90.951259][ T977] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 90.951512][ T977] R10: 00007fd960697ef8 R11: 0000000000000246 R12: 0000000000000002 [ 90.951771][ T977] R13: 0000000067792b5e R14: 0000000000498600 R15: 0000000000000000 [ 90.952038][ T977]