[ 10.999577][ T249] ip (249) used greatest stack depth: 23424 bytes left [ 14.343821][ T307] 8021q: 802.1Q VLAN Support v1.8 [ 15.079017][ T318] gre: GRE over IPv4 demultiplexor driver [ 15.098459][ T318] ip_gre: GRE over IPv4 tunneling driver [ 19.244947][ T376] GACT probability NOT on [ 55.467721][ T547] [ 55.467910][ T547] ============================================ [ 55.468123][ T547] WARNING: possible recursive locking detected [ 55.468316][ T547] 6.13.0-rc5-virtme #1 Not tainted [ 55.468477][ T547] -------------------------------------------- [ 55.468658][ T547] ip/547 is trying to acquire lock: [ 55.468808][ T547] ffffffffb1bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 55.469140][ T547] [ 55.469140][ T547] but task is already holding lock: [ 55.469369][ T547] ffffffffb1bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 55.469672][ T547] [ 55.469672][ T547] other info that might help us debug this: [ 55.469903][ T547] Possible unsafe locking scenario: [ 55.469903][ T547] [ 55.470117][ T547] CPU0 [ 55.470226][ T547] ---- [ 55.470335][ T547] lock((netdev_chain).rwsem); [ 55.470491][ T547] lock((netdev_chain).rwsem); [ 55.470661][ T547] [ 55.470661][ T547] *** DEADLOCK *** [ 55.470661][ T547] [ 55.470885][ T547] May be due to missing lock nesting notation [ 55.470885][ T547] [ 55.471108][ T547] 2 locks held by ip/547: [ 55.471229][ T547] #0: ffffffffb1be7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 55.471536][ T547] #1: ffffffffb1bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 55.471855][ T547] [ 55.471855][ T547] stack backtrace: [ 55.472036][ T547] CPU: 3 UID: 0 PID: 547 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 55.472259][ T547] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 55.472443][ T547] Call Trace: [ 55.472555][ T547] [ 55.472642][ T547] dump_stack_lvl+0x82/0xd0 [ 55.472798][ T547] print_deadlock_bug+0x40a/0x650 [ 55.472972][ T547] validate_chain+0x5bf/0xae0 [ 55.473123][ T547] ? __pfx_validate_chain+0x10/0x10 [ 55.473283][ T547] ? hlock_class+0x4e/0x130 [ 55.473428][ T547] ? mark_lock+0x38/0x3e0 [ 55.473547][ T547] __lock_acquire+0xb9a/0x1680 [ 55.473699][ T547] lock_acquire.part.0+0xeb/0x330 [ 55.473853][ T547] ? blocking_notifier_call_chain+0x50/0x90 [ 55.474050][ T547] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 55.474239][ T547] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 55.474386][ T547] ? trace_lock_acquire+0x14c/0x1f0 [ 55.474531][ T547] ? lock_acquire+0x32/0xc0 [ 55.474697][ T547] ? blocking_notifier_call_chain+0x50/0x90 [ 55.474887][ T547] down_read+0x9f/0x340 [ 55.475008][ T547] ? blocking_notifier_call_chain+0x50/0x90 [ 55.475198][ T547] ? __pfx_down_read+0x10/0x10 [ 55.475352][ T547] ? __lock_release+0x103/0x460 [ 55.475507][ T547] ? netconsole_netdev_event+0x2c1/0x620 [ 55.475656][ T547] ? __pfx___lock_release+0x10/0x10 [ 55.475811][ T547] blocking_notifier_call_chain+0x50/0x90 [ 55.475962][ T547] __netdev_upper_dev_unlink+0xd9/0x220 [ 55.476120][ T547] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 55.476303][ T547] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 55.476453][ T547] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 55.476636][ T547] ? rtnl_is_locked+0x15/0x20 [ 55.476787][ T547] netdev_upper_dev_unlink+0x71/0xa0 [ 55.476943][ T547] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 55.477142][ T547] ? netconsole_netdev_event+0x2c1/0x620 [ 55.477319][ T547] ? mutex_is_locked+0x1c/0x60 [ 55.477471][ T547] ? rtnl_is_locked+0x15/0x20 [ 55.477626][ T547] ? netdev_master_upper_dev_get+0x13/0x120 [ 55.477814][ T547] vrf_device_event+0x78/0xe0 [vrf] [ 55.477975][ T547] notifier_call_chain+0xcd/0x150 [ 55.478124][ T547] blocking_notifier_call_chain+0x66/0x90 [ 55.478279][ T547] unregister_netdevice_many_notify+0xa7b/0x1580 [ 55.478465][ T547] ? hlock_class+0x4e/0x130 [ 55.478612][ T547] ? mark_lock+0x38/0x3e0 [ 55.478745][ T547] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 55.478927][ T547] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 55.479115][ T547] ? kfree+0xf3/0x330 [ 55.479229][ T547] ? vlan_vid_del+0x310/0x5e0 [ 55.479394][ T547] ? vlan_vid_del+0x310/0x5e0 [ 55.479541][ T547] rtnl_dellink+0x348/0xa40 [ 55.479693][ T547] ? __pfx_rtnl_dellink+0x10/0x10 [ 55.479854][ T547] ? find_held_lock+0x2c/0x110 [ 55.480006][ T547] ? __lock_release+0x103/0x460 [ 55.480151][ T547] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 55.480298][ T547] ? __pfx___lock_release+0x10/0x10 [ 55.480444][ T547] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 55.480601][ T547] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 55.480748][ T547] ? __pfx_rtnl_dellink+0x10/0x10 [ 55.480896][ T547] rtnetlink_rcv_msg+0x712/0xc10 [ 55.481043][ T547] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 55.481191][ T547] ? hlock_class+0x4e/0x130 [ 55.481344][ T547] ? mark_lock+0x38/0x3e0 [ 55.481459][ T547] ? __lock_acquire+0xb9a/0x1680 [ 55.481631][ T547] netlink_rcv_skb+0x130/0x360 [ 55.481778][ T547] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 55.481924][ T547] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 55.482078][ T547] ? netlink_deliver_tap+0x13e/0x340 [ 55.482228][ T547] ? netlink_deliver_tap+0xc3/0x340 [ 55.482376][ T547] netlink_unicast+0x44b/0x710 [ 55.482522][ T547] ? __pfx_netlink_unicast+0x10/0x10 [ 55.482677][ T547] ? find_held_lock+0x2c/0x110 [ 55.482827][ T547] netlink_sendmsg+0x723/0xbe0 [ 55.482975][ T547] ? __pfx_netlink_sendmsg+0x10/0x10 [ 55.483124][ T547] ____sys_sendmsg+0x7ac/0xa10 [ 55.483274][ T547] ? __pfx_____sys_sendmsg+0x10/0x10 [ 55.483420][ T547] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 55.483605][ T547] ___sys_sendmsg+0xee/0x170 [ 55.483765][ T547] ? __pfx____sys_sendmsg+0x10/0x10 [ 55.483912][ T547] ? kasan_save_stack+0x34/0x50 [ 55.484061][ T547] ? kasan_save_stack+0x24/0x50 [ 55.484208][ T547] ? __kasan_record_aux_stack+0x8e/0xa0 [ 55.484359][ T547] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 55.484546][ T547] ? __x64_sys_close+0x7c/0xd0 [ 55.484697][ T547] ? do_syscall_64+0xc1/0x1d0 [ 55.484847][ T547] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 55.485040][ T547] ? __lock_acquire+0xb9a/0x1680 [ 55.485195][ T547] ? find_held_lock+0x2c/0x110 [ 55.485344][ T547] ? __lock_release+0x103/0x460 [ 55.485492][ T547] ? __virt_addr_valid+0x22b/0x430 [ 55.485641][ T547] ? __pfx___lock_release+0x10/0x10 [ 55.485789][ T547] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 55.485937][ T547] __sys_sendmsg+0x109/0x1a0 [ 55.486092][ T547] ? __pfx___sys_sendmsg+0x10/0x10 [ 55.486241][ T547] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 55.486435][ T547] do_syscall_64+0xc1/0x1d0 [ 55.486587][ T547] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 55.486779][ T547] RIP: 0033:0x7f27c73e59a7 [ 55.486950][ T547] 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 [ 55.487510][ T547] RSP: 002b:00007ffc0a5bc838 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.487743][ T547] RAX: ffffffffffffffda RBX: 00007ffc0a5bcf60 RCX: 00007f27c73e59a7 [ 55.487969][ T547] RDX: 0000000000000000 RSI: 00007ffc0a5bc8a0 RDI: 0000000000000005 [ 55.488202][ T547] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 55.488427][ T547] R10: 00007f27c72a3ef8 R11: 0000000000000246 R12: 0000000000000002 [ 55.488650][ T547] R13: 0000000067790081 R14: 0000000000498600 R15: 0000000000000000 [ 55.488876][ T547]