[ 16.406607][ T337] 8021q: 802.1Q VLAN Support v1.8 [ 16.822451][ T342] gre: GRE over IPv4 demultiplexor driver [ 16.879331][ T342] ip6_gre: GRE over IPv6 tunneling driver [ 26.576016][ T418] GACT probability NOT on [ 44.785276][ T636] [ 44.785471][ T636] ============================================ [ 44.785683][ T636] WARNING: possible recursive locking detected [ 44.785890][ T636] 6.13.0-rc5-virtme #1 Not tainted [ 44.786081][ T636] -------------------------------------------- [ 44.786295][ T636] ip/636 is trying to acquire lock: [ 44.786467][ T636] ffffffffa7dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.786812][ T636] [ 44.786812][ T636] but task is already holding lock: [ 44.787056][ T636] ffffffffa7dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.787386][ T636] [ 44.787386][ T636] other info that might help us debug this: [ 44.787630][ T636] Possible unsafe locking scenario: [ 44.787630][ T636] [ 44.787870][ T636] CPU0 [ 44.787990][ T636] ---- [ 44.788111][ T636] lock((netdev_chain).rwsem); [ 44.788273][ T636] lock((netdev_chain).rwsem); [ 44.788451][ T636] [ 44.788451][ T636] *** DEADLOCK *** [ 44.788451][ T636] [ 44.788685][ T636] May be due to missing lock nesting notation [ 44.788685][ T636] [ 44.788919][ T636] 2 locks held by ip/636: [ 44.789048][ T636] #0: ffffffffa7de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 44.789337][ T636] #1: ffffffffa7dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.789671][ T636] [ 44.789671][ T636] stack backtrace: [ 44.789880][ T636] CPU: 3 UID: 0 PID: 636 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 44.790131][ T636] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.790339][ T636] Call Trace: [ 44.790472][ T636] [ 44.790573][ T636] dump_stack_lvl+0x82/0xd0 [ 44.790762][ T636] print_deadlock_bug+0x40a/0x650 [ 44.790933][ T636] validate_chain+0x5bf/0xae0 [ 44.791099][ T636] ? __pfx_validate_chain+0x10/0x10 [ 44.791273][ T636] ? hlock_class+0x4e/0x130 [ 44.791436][ T636] ? mark_lock+0x38/0x3e0 [ 44.791562][ T636] __lock_acquire+0xb9a/0x1680 [ 44.791729][ T636] lock_acquire.part.0+0xeb/0x330 [ 44.791898][ T636] ? blocking_notifier_call_chain+0x50/0x90 [ 44.792114][ T636] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 44.792324][ T636] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.792494][ T636] ? trace_lock_acquire+0x14c/0x1f0 [ 44.792665][ T636] ? lock_acquire+0x32/0xc0 [ 44.792828][ T636] ? blocking_notifier_call_chain+0x50/0x90 [ 44.793034][ T636] down_read+0x9f/0x340 [ 44.793162][ T636] ? blocking_notifier_call_chain+0x50/0x90 [ 44.793366][ T636] ? __pfx_down_read+0x10/0x10 [ 44.793534][ T636] ? __lock_release+0x103/0x460 [ 44.793703][ T636] ? netconsole_netdev_event+0x2c1/0x620 [ 44.793868][ T636] ? __pfx___lock_release+0x10/0x10 [ 44.794034][ T636] blocking_notifier_call_chain+0x50/0x90 [ 44.794196][ T636] __netdev_upper_dev_unlink+0xd9/0x220 [ 44.794369][ T636] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 44.794573][ T636] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 44.794747][ T636] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 44.794950][ T636] ? rtnl_is_locked+0x15/0x20 [ 44.795121][ T636] netdev_upper_dev_unlink+0x71/0xa0 [ 44.795291][ T636] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 44.795497][ T636] ? netconsole_netdev_event+0x2c1/0x620 [ 44.795671][ T636] ? mutex_is_locked+0x1c/0x60 [ 44.795837][ T636] ? rtnl_is_locked+0x15/0x20 [ 44.796008][ T636] ? netdev_master_upper_dev_get+0x13/0x120 [ 44.796210][ T636] vrf_device_event+0x78/0xe0 [vrf] [ 44.796377][ T636] notifier_call_chain+0xcd/0x150 [ 44.796538][ T636] blocking_notifier_call_chain+0x66/0x90 [ 44.796704][ T636] unregister_netdevice_many_notify+0xa7b/0x1580 [ 44.796911][ T636] ? __lock_release+0x103/0x460 [ 44.797072][ T636] ? __pfx___lock_release+0x10/0x10 [ 44.797236][ T636] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 44.797435][ T636] ? hlock_class+0x4e/0x130 [ 44.797599][ T636] ? mark_held_locks+0x9e/0xe0 [ 44.797763][ T636] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 44.797939][ T636] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 44.798142][ T636] rtnl_dellink+0x348/0xa40 [ 44.798305][ T636] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.798479][ T636] ? find_held_lock+0x2c/0x110 [ 44.798641][ T636] ? __lock_release+0x103/0x460 [ 44.798799][ T636] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.798957][ T636] ? __pfx___lock_release+0x10/0x10 [ 44.799114][ T636] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.799286][ T636] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.799443][ T636] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.799599][ T636] rtnetlink_rcv_msg+0x712/0xc10 [ 44.799756][ T636] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.799915][ T636] ? hlock_class+0x4e/0x130 [ 44.800072][ T636] ? mark_lock+0x38/0x3e0 [ 44.800192][ T636] ? __lock_acquire+0xb9a/0x1680 [ 44.800355][ T636] netlink_rcv_skb+0x130/0x360 [ 44.800526][ T636] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.800686][ T636] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 44.800850][ T636] ? netlink_deliver_tap+0x13e/0x340 [ 44.801018][ T636] ? netlink_deliver_tap+0xc3/0x340 [ 44.801203][ T636] netlink_unicast+0x44b/0x710 [ 44.801364][ T636] ? __pfx_netlink_unicast+0x10/0x10 [ 44.801536][ T636] ? find_held_lock+0x2c/0x110 [ 44.801699][ T636] netlink_sendmsg+0x723/0xbe0 [ 44.801861][ T636] ? __pfx_netlink_sendmsg+0x10/0x10 [ 44.802024][ T636] ____sys_sendmsg+0x7ac/0xa10 [ 44.802202][ T636] ? __pfx_____sys_sendmsg+0x10/0x10 [ 44.802373][ T636] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 44.802578][ T636] ___sys_sendmsg+0xee/0x170 [ 44.802744][ T636] ? __pfx____sys_sendmsg+0x10/0x10 [ 44.802905][ T636] ? kasan_save_stack+0x34/0x50 [ 44.803073][ T636] ? kasan_save_stack+0x24/0x50 [ 44.803254][ T636] ? __kasan_record_aux_stack+0x8e/0xa0 [ 44.803417][ T636] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 44.803629][ T636] ? __x64_sys_close+0x7c/0xd0 [ 44.803795][ T636] ? do_syscall_64+0xc1/0x1d0 [ 44.803961][ T636] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.804165][ T636] ? __lock_acquire+0xb9a/0x1680 [ 44.804353][ T636] ? find_held_lock+0x2c/0x110 [ 44.804516][ T636] ? __lock_release+0x103/0x460 [ 44.804677][ T636] ? __virt_addr_valid+0x22b/0x430 [ 44.804835][ T636] ? __pfx___lock_release+0x10/0x10 [ 44.804992][ T636] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.805176][ T636] __sys_sendmsg+0x109/0x1a0 [ 44.805334][ T636] ? __pfx___sys_sendmsg+0x10/0x10 [ 44.805493][ T636] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 44.805699][ T636] do_syscall_64+0xc1/0x1d0 [ 44.805862][ T636] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.806059][ T636] RIP: 0033:0x7f467d0b09a7 [ 44.806232][ T636] 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 [ 44.806831][ T636] RSP: 002b:00007fffbcf9fb48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.807090][ T636] RAX: ffffffffffffffda RBX: 00007fffbcfa0270 RCX: 00007f467d0b09a7 [ 44.807333][ T636] RDX: 0000000000000000 RSI: 00007fffbcf9fbb0 RDI: 0000000000000005 [ 44.807581][ T636] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.807844][ T636] R10: 00007f467cf6eef8 R11: 0000000000000246 R12: 0000000000000002 [ 44.808084][ T636] R13: 00000000677900ca R14: 0000000000498600 R15: 0000000000000000 [ 44.808349][ T636]