[ 119.605853][ T990] 8021q: 802.1Q VLAN Support v1.8 [ 120.037133][ T996] gre: GRE over IPv4 demultiplexor driver [ 120.086094][ T996] ip6_gre: GRE over IPv6 tunneling driver [ 147.016645][ T1287] [ 147.016824][ T1287] ============================================ [ 147.017060][ T1287] WARNING: possible recursive locking detected [ 147.017288][ T1287] 6.13.0-rc5-virtme #1 Not tainted [ 147.017487][ T1287] -------------------------------------------- [ 147.017720][ T1287] ip/1287 is trying to acquire lock: [ 147.017894][ T1287] ffffffffb2dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 147.018267][ T1287] [ 147.018267][ T1287] but task is already holding lock: [ 147.018530][ T1287] ffffffffb2dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 147.018882][ T1287] [ 147.018882][ T1287] other info that might help us debug this: [ 147.019112][ T1287] Possible unsafe locking scenario: [ 147.019112][ T1287] [ 147.019363][ T1287] CPU0 [ 147.019482][ T1287] ---- [ 147.019603][ T1287] lock((netdev_chain).rwsem); [ 147.019783][ T1287] lock((netdev_chain).rwsem); [ 147.019960][ T1287] [ 147.019960][ T1287] *** DEADLOCK *** [ 147.019960][ T1287] [ 147.020212][ T1287] May be due to missing lock nesting notation [ 147.020212][ T1287] [ 147.020453][ T1287] 2 locks held by ip/1287: [ 147.020616][ T1287] #0: ffffffffb2de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 147.020938][ T1287] #1: ffffffffb2dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 147.021310][ T1287] [ 147.021310][ T1287] stack backtrace: [ 147.021527][ T1287] CPU: 2 UID: 0 PID: 1287 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 147.021793][ T1287] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 147.022027][ T1287] Call Trace: [ 147.022163][ T1287] [ 147.022261][ T1287] dump_stack_lvl+0x82/0xd0 [ 147.022445][ T1287] print_deadlock_bug+0x40a/0x650 [ 147.022626][ T1287] validate_chain+0x5bf/0xae0 [ 147.022806][ T1287] ? __pfx_validate_chain+0x10/0x10 [ 147.022985][ T1287] ? hlock_class+0x4e/0x130 [ 147.023162][ T1287] ? mark_lock+0x38/0x3e0 [ 147.023311][ T1287] __lock_acquire+0xb9a/0x1680 [ 147.023501][ T1287] lock_acquire.part.0+0xeb/0x330 [ 147.023694][ T1287] ? blocking_notifier_call_chain+0x50/0x90 [ 147.023969][ T1287] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 147.024209][ T1287] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 147.024389][ T1287] ? trace_lock_acquire+0x14c/0x1f0 [ 147.024580][ T1287] ? lock_acquire+0x32/0xc0 [ 147.024766][ T1287] ? blocking_notifier_call_chain+0x50/0x90 [ 147.025006][ T1287] down_read+0x9f/0x340 [ 147.025148][ T1287] ? blocking_notifier_call_chain+0x50/0x90 [ 147.025377][ T1287] ? __pfx_down_read+0x10/0x10 [ 147.025559][ T1287] ? __lock_release+0x103/0x460 [ 147.025744][ T1287] ? netconsole_netdev_event+0x2c1/0x620 [ 147.025926][ T1287] ? __pfx___lock_release+0x10/0x10 [ 147.026121][ T1287] blocking_notifier_call_chain+0x50/0x90 [ 147.026315][ T1287] __netdev_upper_dev_unlink+0xd9/0x220 [ 147.026501][ T1287] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 147.026726][ T1287] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 147.026902][ T1287] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 147.027124][ T1287] ? rtnl_is_locked+0x15/0x20 [ 147.027322][ T1287] netdev_upper_dev_unlink+0x71/0xa0 [ 147.027500][ T1287] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 147.027730][ T1287] ? netconsole_netdev_event+0x2c1/0x620 [ 147.027921][ T1287] ? mutex_is_locked+0x1c/0x60 [ 147.028108][ T1287] ? rtnl_is_locked+0x15/0x20 [ 147.028290][ T1287] ? netdev_master_upper_dev_get+0x13/0x120 [ 147.028510][ T1287] vrf_device_event+0x78/0xe0 [vrf] [ 147.028695][ T1287] notifier_call_chain+0xcd/0x150 [ 147.028873][ T1287] blocking_notifier_call_chain+0x66/0x90 [ 147.029061][ T1287] unregister_netdevice_many_notify+0xa7b/0x1580 [ 147.029284][ T1287] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 147.029504][ T1287] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 147.029689][ T1287] ? __pfx___lock_release+0x10/0x10 [ 147.029873][ T1287] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 147.030052][ T1287] ? rtnl_is_locked+0x15/0x20 [ 147.030243][ T1287] ? unregister_netdevice_queue+0x70/0x410 [ 147.030443][ T1287] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 147.030644][ T1287] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 147.030816][ T1287] rtnl_dellink+0x348/0xa40 [ 147.030977][ T1287] ? __pfx_rtnl_dellink+0x10/0x10 [ 147.031162][ T1287] ? find_held_lock+0x2c/0x110 [ 147.031341][ T1287] ? __lock_release+0x103/0x460 [ 147.031513][ T1287] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 147.031698][ T1287] ? __pfx___lock_release+0x10/0x10 [ 147.031871][ T1287] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 147.032054][ T1287] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 147.032232][ T1287] ? __pfx_rtnl_dellink+0x10/0x10 [ 147.032409][ T1287] rtnetlink_rcv_msg+0x712/0xc10 [ 147.032585][ T1287] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 147.032769][ T1287] ? hlock_class+0x4e/0x130 [ 147.032947][ T1287] ? mark_lock+0x38/0x3e0 [ 147.033083][ T1287] ? __lock_acquire+0xb9a/0x1680 [ 147.033264][ T1287] netlink_rcv_skb+0x130/0x360 [ 147.033438][ T1287] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 147.033616][ T1287] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 147.033809][ T1287] ? netlink_deliver_tap+0x13e/0x340 [ 147.033988][ T1287] ? netlink_deliver_tap+0xc3/0x340 [ 147.034172][ T1287] netlink_unicast+0x44b/0x710 [ 147.034350][ T1287] ? __pfx_netlink_unicast+0x10/0x10 [ 147.034524][ T1287] ? find_held_lock+0x2c/0x110 [ 147.034702][ T1287] netlink_sendmsg+0x723/0xbe0 [ 147.034879][ T1287] ? __pfx_netlink_sendmsg+0x10/0x10 [ 147.035057][ T1287] ____sys_sendmsg+0x7ac/0xa10 [ 147.035233][ T1287] ? __pfx_____sys_sendmsg+0x10/0x10 [ 147.035413][ T1287] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 147.035636][ T1287] ___sys_sendmsg+0xee/0x170 [ 147.035814][ T1287] ? __pfx____sys_sendmsg+0x10/0x10 [ 147.035993][ T1287] ? kasan_save_stack+0x34/0x50 [ 147.036175][ T1287] ? kasan_save_stack+0x24/0x50 [ 147.036354][ T1287] ? __kasan_record_aux_stack+0x8e/0xa0 [ 147.036532][ T1287] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 147.036758][ T1287] ? __x64_sys_close+0x7c/0xd0 [ 147.036935][ T1287] ? do_syscall_64+0xc1/0x1d0 [ 147.037114][ T1287] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 147.037331][ T1287] ? __lock_acquire+0xb9a/0x1680 [ 147.037511][ T1287] ? find_held_lock+0x2c/0x110 [ 147.037698][ T1287] ? __lock_release+0x103/0x460 [ 147.037883][ T1287] ? __virt_addr_valid+0x22b/0x430 [ 147.038066][ T1287] ? __pfx___lock_release+0x10/0x10 [ 147.038247][ T1287] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 147.038427][ T1287] __sys_sendmsg+0x109/0x1a0 [ 147.038605][ T1287] ? __pfx___sys_sendmsg+0x10/0x10 [ 147.038794][ T1287] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 147.039016][ T1287] do_syscall_64+0xc1/0x1d0 [ 147.039205][ T1287] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 147.039428][ T1287] RIP: 0033:0x7f89d03719a7 [ 147.039615][ T1287] 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 [ 147.040220][ T1287] RSP: 002b:00007ffed55c5e58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 147.040463][ T1287] RAX: ffffffffffffffda RBX: 00007ffed55c6580 RCX: 00007f89d03719a7 [ 147.040723][ T1287] RDX: 0000000000000000 RSI: 00007ffed55c5ec0 RDI: 0000000000000005 [ 147.040962][ T1287] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 147.041199][ T1287] R10: 00007f89d022fef8 R11: 0000000000000246 R12: 0000000000000002 [ 147.041438][ T1287] R13: 000000006779009e R14: 0000000000498600 R15: 0000000000000000 [ 147.041689][ T1287]