[ 221.146018][ T1776] gre: GRE over IPv4 demultiplexor driver [ 221.171971][ T1776] ip_gre: GRE over IPv4 tunneling driver [ 222.812524][ T1798] 8021q: 802.1Q VLAN Support v1.8 [ 385.748708][ T2044] [ 385.748880][ T2044] ============================================ [ 385.749091][ T2044] WARNING: possible recursive locking detected [ 385.749294][ T2044] 6.13.0-rc5-virtme #1 Not tainted [ 385.749469][ T2044] -------------------------------------------- [ 385.749650][ T2044] ip/2044 is trying to acquire lock: [ 385.749795][ T2044] ffffffff959d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 385.750106][ T2044] [ 385.750106][ T2044] but task is already holding lock: [ 385.750322][ T2044] ffffffff959d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 385.750685][ T2044] [ 385.750685][ T2044] other info that might help us debug this: [ 385.750980][ T2044] Possible unsafe locking scenario: [ 385.750980][ T2044] [ 385.751296][ T2044] CPU0 [ 385.751446][ T2044] ---- [ 385.751592][ T2044] lock((netdev_chain).rwsem); [ 385.751813][ T2044] lock((netdev_chain).rwsem); [ 385.752034][ T2044] [ 385.752034][ T2044] *** DEADLOCK *** [ 385.752034][ T2044] [ 385.752361][ T2044] May be due to missing lock nesting notation [ 385.752361][ T2044] [ 385.752681][ T2044] 2 locks held by ip/2044: [ 385.752905][ T2044] #0: ffffffff959e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 385.753324][ T2044] #1: ffffffff959d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 385.753763][ T2044] [ 385.753763][ T2044] stack backtrace: [ 385.754049][ T2044] CPU: 3 UID: 0 PID: 2044 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 385.754385][ T2044] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 385.754659][ T2044] Call Trace: [ 385.754829][ T2044] [ 385.754947][ T2044] dump_stack_lvl+0x82/0xd0 [ 385.755179][ T2044] print_deadlock_bug+0x40a/0x650 [ 385.755408][ T2044] validate_chain+0x5bf/0xae0 [ 385.755646][ T2044] ? __pfx_validate_chain+0x10/0x10 [ 385.755865][ T2044] ? hlock_class+0x4e/0x130 [ 385.756089][ T2044] ? mark_lock+0x38/0x3e0 [ 385.756202][ T2044] __lock_acquire+0xb9a/0x1680 [ 385.756353][ T2044] lock_acquire.part.0+0xeb/0x330 [ 385.756506][ T2044] ? blocking_notifier_call_chain+0x50/0x90 [ 385.756710][ T2044] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 385.756953][ T2044] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 385.757154][ T2044] ? trace_lock_acquire+0x14c/0x1f0 [ 385.757302][ T2044] ? lock_acquire+0x32/0xc0 [ 385.757457][ T2044] ? blocking_notifier_call_chain+0x50/0x90 [ 385.757642][ T2044] down_read+0x9f/0x340 [ 385.757758][ T2044] ? blocking_notifier_call_chain+0x50/0x90 [ 385.757944][ T2044] ? __pfx_down_read+0x10/0x10 [ 385.758091][ T2044] ? __lock_release+0x103/0x460 [ 385.758244][ T2044] ? netconsole_netdev_event+0x2c1/0x620 [ 385.758400][ T2044] ? __pfx___lock_release+0x10/0x10 [ 385.758550][ T2044] blocking_notifier_call_chain+0x50/0x90 [ 385.758699][ T2044] __netdev_upper_dev_unlink+0xd9/0x220 [ 385.758849][ T2044] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 385.759037][ T2044] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 385.759191][ T2044] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 385.759431][ T2044] ? rtnl_is_locked+0x15/0x20 [ 385.759580][ T2044] netdev_upper_dev_unlink+0x71/0xa0 [ 385.759727][ T2044] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 385.759910][ T2044] ? netconsole_netdev_event+0x2c1/0x620 [ 385.760058][ T2044] ? mutex_is_locked+0x1c/0x60 [ 385.760207][ T2044] ? rtnl_is_locked+0x15/0x20 [ 385.760357][ T2044] ? netdev_master_upper_dev_get+0x13/0x120 [ 385.760562][ T2044] vrf_device_event+0x78/0xe0 [vrf] [ 385.760714][ T2044] notifier_call_chain+0xcd/0x150 [ 385.760862][ T2044] blocking_notifier_call_chain+0x66/0x90 [ 385.761008][ T2044] unregister_netdevice_many_notify+0xa7b/0x1580 [ 385.761194][ T2044] ? hlock_class+0x4e/0x130 [ 385.761341][ T2044] ? mark_lock+0x38/0x3e0 [ 385.761465][ T2044] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 385.761646][ T2044] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 385.761829][ T2044] ? kfree+0xf3/0x330 [ 385.761942][ T2044] ? vlan_vid_del+0x310/0x5e0 [ 385.762096][ T2044] ? vlan_vid_del+0x310/0x5e0 [ 385.762244][ T2044] rtnl_dellink+0x348/0xa40 [ 385.762394][ T2044] ? __pfx_rtnl_dellink+0x10/0x10 [ 385.762561][ T2044] ? find_held_lock+0x2c/0x110 [ 385.762709][ T2044] ? __lock_release+0x103/0x460 [ 385.762855][ T2044] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 385.763000][ T2044] ? __pfx___lock_release+0x10/0x10 [ 385.763177][ T2044] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 385.763340][ T2044] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 385.763507][ T2044] ? __pfx_rtnl_dellink+0x10/0x10 [ 385.763673][ T2044] rtnetlink_rcv_msg+0x712/0xc10 [ 385.763835][ T2044] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 385.763995][ T2044] ? hlock_class+0x4e/0x130 [ 385.764155][ T2044] ? mark_lock+0x38/0x3e0 [ 385.764277][ T2044] ? __lock_acquire+0xb9a/0x1680 [ 385.764443][ T2044] netlink_rcv_skb+0x130/0x360 [ 385.764604][ T2044] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 385.764765][ T2044] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 385.764934][ T2044] ? netlink_deliver_tap+0x13e/0x340 [ 385.765098][ T2044] ? netlink_deliver_tap+0xc3/0x340 [ 385.765258][ T2044] netlink_unicast+0x44b/0x710 [ 385.765427][ T2044] ? __pfx_netlink_unicast+0x10/0x10 [ 385.765583][ T2044] ? find_held_lock+0x2c/0x110 [ 385.765746][ T2044] netlink_sendmsg+0x723/0xbe0 [ 385.765909][ T2044] ? __pfx_netlink_sendmsg+0x10/0x10 [ 385.766077][ T2044] ____sys_sendmsg+0x7ac/0xa10 [ 385.766242][ T2044] ? __pfx_____sys_sendmsg+0x10/0x10 [ 385.766409][ T2044] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 385.766612][ T2044] ___sys_sendmsg+0xee/0x170 [ 385.766773][ T2044] ? __pfx____sys_sendmsg+0x10/0x10 [ 385.766934][ T2044] ? kasan_save_stack+0x34/0x50 [ 385.767098][ T2044] ? kasan_save_stack+0x24/0x50 [ 385.767263][ T2044] ? __kasan_record_aux_stack+0x8e/0xa0 [ 385.767435][ T2044] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 385.767638][ T2044] ? __x64_sys_close+0x7c/0xd0 [ 385.767800][ T2044] ? do_syscall_64+0xc1/0x1d0 [ 385.767960][ T2044] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 385.768160][ T2044] ? __lock_acquire+0xb9a/0x1680 [ 385.768323][ T2044] ? find_held_lock+0x2c/0x110 [ 385.768501][ T2044] ? __lock_release+0x103/0x460 [ 385.768661][ T2044] ? __virt_addr_valid+0x22b/0x430 [ 385.768822][ T2044] ? __pfx___lock_release+0x10/0x10 [ 385.768980][ T2044] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 385.769143][ T2044] __sys_sendmsg+0x109/0x1a0 [ 385.769305][ T2044] ? __pfx___sys_sendmsg+0x10/0x10 [ 385.769473][ T2044] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 385.769689][ T2044] do_syscall_64+0xc1/0x1d0 [ 385.769850][ T2044] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 385.770091][ T2044] RIP: 0033:0x7f224cf669a7 [ 385.770267][ T2044] 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 [ 385.770801][ T2044] RSP: 002b:00007ffee3ffcfa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 385.771024][ T2044] RAX: ffffffffffffffda RBX: 00007ffee3ffd6d0 RCX: 00007f224cf669a7 [ 385.771256][ T2044] RDX: 0000000000000000 RSI: 00007ffee3ffd010 RDI: 0000000000000005 [ 385.771483][ T2044] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 385.771705][ T2044] R10: 00007f224ce24ef8 R11: 0000000000000246 R12: 0000000000000002 [ 385.771930][ T2044] R13: 000000006778fea0 R14: 0000000000498600 R15: 0000000000000000 [ 385.772153][ T2044]