[ 14.025042][ T306] 8021q: 802.1Q VLAN Support v1.8 [ 14.771843][ T317] gre: GRE over IPv4 demultiplexor driver [ 14.792366][ T317] ip_gre: GRE over IPv4 tunneling driver [ 18.853513][ T375] GACT probability NOT on [ 53.572837][ T546] [ 53.572982][ T546] ============================================ [ 53.573172][ T546] WARNING: possible recursive locking detected [ 53.573367][ T546] 6.13.0-rc5-virtme #1 Not tainted [ 53.573510][ T546] -------------------------------------------- [ 53.573698][ T546] ip/546 is trying to acquire lock: [ 53.573854][ T546] ffffffffa5bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 53.574154][ T546] [ 53.574154][ T546] but task is already holding lock: [ 53.574385][ T546] ffffffffa5bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 53.574681][ T546] [ 53.574681][ T546] other info that might help us debug this: [ 53.574893][ T546] Possible unsafe locking scenario: [ 53.574893][ T546] [ 53.575105][ T546] CPU0 [ 53.575211][ T546] ---- [ 53.575318][ T546] lock((netdev_chain).rwsem); [ 53.575462][ T546] lock((netdev_chain).rwsem); [ 53.575611][ T546] [ 53.575611][ T546] *** DEADLOCK *** [ 53.575611][ T546] [ 53.575822][ T546] May be due to missing lock nesting notation [ 53.575822][ T546] [ 53.576054][ T546] 2 locks held by ip/546: [ 53.576166][ T546] #0: ffffffffa5be7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 53.576435][ T546] #1: ffffffffa5bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 53.576752][ T546] [ 53.576752][ T546] stack backtrace: [ 53.576944][ T546] CPU: 0 UID: 0 PID: 546 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 53.577160][ T546] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 53.577361][ T546] Call Trace: [ 53.577477][ T546] [ 53.577561][ T546] dump_stack_lvl+0x82/0xd0 [ 53.577728][ T546] print_deadlock_bug+0x40a/0x650 [ 53.577874][ T546] validate_chain+0x5bf/0xae0 [ 53.578037][ T546] ? __pfx_validate_chain+0x10/0x10 [ 53.578183][ T546] ? hlock_class+0x4e/0x130 [ 53.578329][ T546] ? mark_lock+0x38/0x3e0 [ 53.578441][ T546] __lock_acquire+0xb9a/0x1680 [ 53.578590][ T546] lock_acquire.part.0+0xeb/0x330 [ 53.578740][ T546] ? blocking_notifier_call_chain+0x50/0x90 [ 53.578918][ T546] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 53.579102][ T546] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.579246][ T546] ? trace_lock_acquire+0x14c/0x1f0 [ 53.579391][ T546] ? lock_acquire+0x32/0xc0 [ 53.579535][ T546] ? blocking_notifier_call_chain+0x50/0x90 [ 53.579717][ T546] down_read+0x9f/0x340 [ 53.579831][ T546] ? blocking_notifier_call_chain+0x50/0x90 [ 53.580022][ T546] ? __pfx_down_read+0x10/0x10 [ 53.580167][ T546] ? __lock_release+0x103/0x460 [ 53.580314][ T546] ? netconsole_netdev_event+0x2c1/0x620 [ 53.580459][ T546] ? __pfx___lock_release+0x10/0x10 [ 53.580607][ T546] blocking_notifier_call_chain+0x50/0x90 [ 53.580754][ T546] __netdev_upper_dev_unlink+0xd9/0x220 [ 53.580907][ T546] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 53.581087][ T546] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 53.581234][ T546] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 53.581417][ T546] ? rtnl_is_locked+0x15/0x20 [ 53.581566][ T546] netdev_upper_dev_unlink+0x71/0xa0 [ 53.581711][ T546] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 53.581895][ T546] ? netconsole_netdev_event+0x2c1/0x620 [ 53.582044][ T546] ? mutex_is_locked+0x1c/0x60 [ 53.582191][ T546] ? rtnl_is_locked+0x15/0x20 [ 53.582338][ T546] ? netdev_master_upper_dev_get+0x13/0x120 [ 53.582518][ T546] vrf_device_event+0x78/0xe0 [vrf] [ 53.582670][ T546] notifier_call_chain+0xcd/0x150 [ 53.582817][ T546] blocking_notifier_call_chain+0x66/0x90 [ 53.582967][ T546] unregister_netdevice_many_notify+0xa7b/0x1580 [ 53.583158][ T546] ? hlock_class+0x4e/0x130 [ 53.583306][ T546] ? mark_lock+0x38/0x3e0 [ 53.583417][ T546] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 53.583599][ T546] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 53.583782][ T546] ? kfree+0xf3/0x330 [ 53.583895][ T546] ? vlan_vid_del+0x310/0x5e0 [ 53.584048][ T546] ? vlan_vid_del+0x310/0x5e0 [ 53.584194][ T546] rtnl_dellink+0x348/0xa40 [ 53.584340][ T546] ? __pfx_rtnl_dellink+0x10/0x10 [ 53.584500][ T546] ? find_held_lock+0x2c/0x110 [ 53.584648][ T546] ? __lock_release+0x103/0x460 [ 53.584791][ T546] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 53.584937][ T546] ? __pfx___lock_release+0x10/0x10 [ 53.585082][ T546] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.585233][ T546] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 53.585377][ T546] ? __pfx_rtnl_dellink+0x10/0x10 [ 53.585522][ T546] rtnetlink_rcv_msg+0x712/0xc10 [ 53.585668][ T546] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 53.585814][ T546] ? hlock_class+0x4e/0x130 [ 53.585971][ T546] ? mark_lock+0x38/0x3e0 [ 53.586085][ T546] ? __lock_acquire+0xb9a/0x1680 [ 53.586245][ T546] netlink_rcv_skb+0x130/0x360 [ 53.586389][ T546] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 53.586552][ T546] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 53.586702][ T546] ? netlink_deliver_tap+0x13e/0x340 [ 53.586849][ T546] ? netlink_deliver_tap+0xc3/0x340 [ 53.586994][ T546] netlink_unicast+0x44b/0x710 [ 53.587140][ T546] ? __pfx_netlink_unicast+0x10/0x10 [ 53.587289][ T546] ? find_held_lock+0x2c/0x110 [ 53.587444][ T546] netlink_sendmsg+0x723/0xbe0 [ 53.587590][ T546] ? __pfx_netlink_sendmsg+0x10/0x10 [ 53.587736][ T546] ____sys_sendmsg+0x7ac/0xa10 [ 53.587896][ T546] ? __pfx_____sys_sendmsg+0x10/0x10 [ 53.588045][ T546] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 53.588228][ T546] ___sys_sendmsg+0xee/0x170 [ 53.588383][ T546] ? __pfx____sys_sendmsg+0x10/0x10 [ 53.588529][ T546] ? kasan_save_stack+0x34/0x50 [ 53.588675][ T546] ? kasan_save_stack+0x24/0x50 [ 53.588817][ T546] ? __kasan_record_aux_stack+0x8e/0xa0 [ 53.588962][ T546] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 53.589145][ T546] ? __x64_sys_close+0x7c/0xd0 [ 53.589291][ T546] ? do_syscall_64+0xc1/0x1d0 [ 53.589436][ T546] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.589622][ T546] ? __lock_acquire+0xb9a/0x1680 [ 53.589771][ T546] ? find_held_lock+0x2c/0x110 [ 53.589916][ T546] ? __lock_release+0x103/0x460 [ 53.590068][ T546] ? __virt_addr_valid+0x22b/0x430 [ 53.590213][ T546] ? __pfx___lock_release+0x10/0x10 [ 53.590359][ T546] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 53.590505][ T546] __sys_sendmsg+0x109/0x1a0 [ 53.590653][ T546] ? __pfx___sys_sendmsg+0x10/0x10 [ 53.590800][ T546] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 53.590985][ T546] do_syscall_64+0xc1/0x1d0 [ 53.591130][ T546] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 53.591310][ T546] RIP: 0033:0x7f931e9b69a7 [ 53.591464][ T546] 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 [ 53.591982][ T546] RSP: 002b:00007ffe4461dec8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 53.592224][ T546] RAX: ffffffffffffffda RBX: 00007ffe4461e5f0 RCX: 00007f931e9b69a7 [ 53.592444][ T546] RDX: 0000000000000000 RSI: 00007ffe4461df30 RDI: 0000000000000005 [ 53.592669][ T546] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 53.592887][ T546] R10: 00007f931e874ef8 R11: 0000000000000246 R12: 0000000000000002 [ 53.593103][ T546] R13: 0000000067792e7f R14: 0000000000498600 R15: 0000000000000000 [ 53.593325][ T546] [ 53.619757][ T546] ip (546) used greatest stack depth: 23904 bytes left