[ 47.856916][ T687] 8021q: 802.1Q VLAN Support v1.8 [ 48.317056][ T693] gre: GRE over IPv4 demultiplexor driver [ 48.329129][ T693] ip_gre: GRE over IPv4 tunneling driver [ 61.738231][ T798] [ 61.738368][ T798] ============================================ [ 61.738565][ T798] WARNING: possible recursive locking detected [ 61.738744][ T798] 6.13.0-rc5-virtme #1 Not tainted [ 61.738887][ T798] -------------------------------------------- [ 61.739088][ T798] ip/798 is trying to acquire lock: [ 61.739254][ T798] ffffffff8dbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 61.739580][ T798] [ 61.739580][ T798] but task is already holding lock: [ 61.739792][ T798] ffffffff8dbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 61.740093][ T798] [ 61.740093][ T798] other info that might help us debug this: [ 61.740320][ T798] Possible unsafe locking scenario: [ 61.740320][ T798] [ 61.740533][ T798] CPU0 [ 61.740642][ T798] ---- [ 61.740751][ T798] lock((netdev_chain).rwsem); [ 61.740900][ T798] lock((netdev_chain).rwsem); [ 61.741055][ T798] [ 61.741055][ T798] *** DEADLOCK *** [ 61.741055][ T798] [ 61.741281][ T798] May be due to missing lock nesting notation [ 61.741281][ T798] [ 61.741499][ T798] 2 locks held by ip/798: [ 61.741617][ T798] #0: ffffffff8dbe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 61.741914][ T798] #1: ffffffff8dbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 61.742223][ T798] [ 61.742223][ T798] stack backtrace: [ 61.742404][ T798] CPU: 0 UID: 0 PID: 798 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 61.742634][ T798] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 61.742825][ T798] Call Trace: [ 61.742936][ T798] [ 61.743013][ T798] dump_stack_lvl+0x82/0xd0 [ 61.743166][ T798] print_deadlock_bug+0x40a/0x650 [ 61.743314][ T798] validate_chain+0x5bf/0xae0 [ 61.743477][ T798] ? __pfx_validate_chain+0x10/0x10 [ 61.743626][ T798] ? hlock_class+0x4e/0x130 [ 61.743776][ T798] ? mark_lock+0x38/0x3e0 [ 61.743889][ T798] __lock_acquire+0xb9a/0x1680 [ 61.744051][ T798] lock_acquire.part.0+0xeb/0x330 [ 61.744195][ T798] ? blocking_notifier_call_chain+0x50/0x90 [ 61.744381][ T798] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 61.744589][ T798] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.744736][ T798] ? trace_lock_acquire+0x14c/0x1f0 [ 61.744892][ T798] ? lock_acquire+0x32/0xc0 [ 61.745038][ T798] ? blocking_notifier_call_chain+0x50/0x90 [ 61.745225][ T798] down_read+0x9f/0x340 [ 61.745358][ T798] ? blocking_notifier_call_chain+0x50/0x90 [ 61.745536][ T798] ? __pfx_down_read+0x10/0x10 [ 61.745698][ T798] ? __lock_release+0x103/0x460 [ 61.745849][ T798] ? netconsole_netdev_event+0x2c1/0x620 [ 61.745998][ T798] ? __pfx___lock_release+0x10/0x10 [ 61.746145][ T798] blocking_notifier_call_chain+0x50/0x90 [ 61.746318][ T798] __netdev_upper_dev_unlink+0xd9/0x220 [ 61.746467][ T798] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 61.746648][ T798] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 61.746794][ T798] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 61.746998][ T798] ? rtnl_is_locked+0x15/0x20 [ 61.747147][ T798] netdev_upper_dev_unlink+0x71/0xa0 [ 61.747301][ T798] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 61.747482][ T798] ? netconsole_netdev_event+0x2c1/0x620 [ 61.747628][ T798] ? mutex_is_locked+0x1c/0x60 [ 61.747794][ T798] ? rtnl_is_locked+0x15/0x20 [ 61.747938][ T798] ? netdev_master_upper_dev_get+0x13/0x120 [ 61.748170][ T798] vrf_device_event+0x78/0xe0 [vrf] [ 61.748334][ T798] notifier_call_chain+0xcd/0x150 [ 61.748499][ T798] blocking_notifier_call_chain+0x66/0x90 [ 61.748661][ T798] unregister_netdevice_many_notify+0xa7b/0x1580 [ 61.748877][ T798] ? find_held_lock+0x2c/0x110 [ 61.749042][ T798] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 61.749259][ T798] ? __pfx___lock_release+0x10/0x10 [ 61.749434][ T798] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.749595][ T798] ? rtnl_is_locked+0x15/0x20 [ 61.749762][ T798] ? unregister_netdevice_queue+0x70/0x410 [ 61.749983][ T798] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 61.750183][ T798] ? net_generic+0xbb/0x1f0 [ 61.750358][ T798] rtnl_dellink+0x348/0xa40 [ 61.750530][ T798] ? __pfx_rtnl_dellink+0x10/0x10 [ 61.750707][ T798] ? find_held_lock+0x2c/0x110 [ 61.750870][ T798] ? __lock_release+0x103/0x460 [ 61.751064][ T798] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 61.751227][ T798] ? __pfx___lock_release+0x10/0x10 [ 61.751388][ T798] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.751551][ T798] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 61.751731][ T798] ? __pfx_rtnl_dellink+0x10/0x10 [ 61.751894][ T798] rtnetlink_rcv_msg+0x712/0xc10 [ 61.752059][ T798] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 61.752234][ T798] ? hlock_class+0x4e/0x130 [ 61.752407][ T798] ? mark_lock+0x38/0x3e0 [ 61.752528][ T798] ? __lock_acquire+0xb9a/0x1680 [ 61.752698][ T798] netlink_rcv_skb+0x130/0x360 [ 61.752864][ T798] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 61.753026][ T798] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 61.753190][ T798] ? netlink_deliver_tap+0x13e/0x340 [ 61.753360][ T798] ? netlink_deliver_tap+0xc3/0x340 [ 61.753522][ T798] netlink_unicast+0x44b/0x710 [ 61.753681][ T798] ? __pfx_netlink_unicast+0x10/0x10 [ 61.753840][ T798] ? find_held_lock+0x2c/0x110 [ 61.754004][ T798] netlink_sendmsg+0x723/0xbe0 [ 61.754169][ T798] ? __pfx_netlink_sendmsg+0x10/0x10 [ 61.754332][ T798] ____sys_sendmsg+0x7ac/0xa10 [ 61.754497][ T798] ? __pfx_____sys_sendmsg+0x10/0x10 [ 61.754663][ T798] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 61.754869][ T798] ___sys_sendmsg+0xee/0x170 [ 61.755029][ T798] ? __pfx____sys_sendmsg+0x10/0x10 [ 61.755192][ T798] ? kasan_save_stack+0x34/0x50 [ 61.755360][ T798] ? kasan_save_stack+0x24/0x50 [ 61.755521][ T798] ? __kasan_record_aux_stack+0x8e/0xa0 [ 61.755705][ T798] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 61.755915][ T798] ? __x64_sys_close+0x7c/0xd0 [ 61.756077][ T798] ? do_syscall_64+0xc1/0x1d0 [ 61.756258][ T798] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.756461][ T798] ? __lock_acquire+0xb9a/0x1680 [ 61.756625][ T798] ? find_held_lock+0x2c/0x110 [ 61.756808][ T798] ? __lock_release+0x103/0x460 [ 61.756967][ T798] ? __virt_addr_valid+0x22b/0x430 [ 61.757138][ T798] ? __pfx___lock_release+0x10/0x10 [ 61.757298][ T798] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.757459][ T798] __sys_sendmsg+0x109/0x1a0 [ 61.757623][ T798] ? __pfx___sys_sendmsg+0x10/0x10 [ 61.757785][ T798] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 61.757989][ T798] do_syscall_64+0xc1/0x1d0 [ 61.758152][ T798] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.758355][ T798] RIP: 0033:0x7fa3a605e9a7 [ 61.758524][ T798] 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 [ 61.759081][ T798] RSP: 002b:00007ffde14e1ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 61.759352][ T798] RAX: ffffffffffffffda RBX: 00007ffde14e2410 RCX: 00007fa3a605e9a7 [ 61.759590][ T798] RDX: 0000000000000000 RSI: 00007ffde14e1d50 RDI: 0000000000000005 [ 61.759827][ T798] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 61.760064][ T798] R10: 00007fa3a5f1cef8 R11: 0000000000000246 R12: 0000000000000002 [ 61.760300][ T798] R13: 0000000067792bdc R14: 0000000000498600 R15: 0000000000000000 [ 61.760550][ T798]