[ 10.720535][ T249] ip (249) used greatest stack depth: 23816 bytes left [ 15.888326][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 16.254083][ T341] gre: GRE over IPv4 demultiplexor driver [ 16.296636][ T341] ip6_gre: GRE over IPv6 tunneling driver [ 25.599125][ T417] GACT probability NOT on [ 42.479610][ T634] [ 42.479781][ T634] ============================================ [ 42.479976][ T634] WARNING: possible recursive locking detected [ 42.480180][ T634] 6.13.0-rc5-virtme #1 Not tainted [ 42.480328][ T634] -------------------------------------------- [ 42.480508][ T634] ip/634 is trying to acquire lock: [ 42.480665][ T634] ffffffffa57d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.480974][ T634] [ 42.480974][ T634] but task is already holding lock: [ 42.481202][ T634] ffffffffa57d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.481506][ T634] [ 42.481506][ T634] other info that might help us debug this: [ 42.481715][ T634] Possible unsafe locking scenario: [ 42.481715][ T634] [ 42.481926][ T634] CPU0 [ 42.482036][ T634] ---- [ 42.482144][ T634] lock((netdev_chain).rwsem); [ 42.482288][ T634] lock((netdev_chain).rwsem); [ 42.482430][ T634] [ 42.482430][ T634] *** DEADLOCK *** [ 42.482430][ T634] [ 42.482648][ T634] May be due to missing lock nesting notation [ 42.482648][ T634] [ 42.482871][ T634] 2 locks held by ip/634: [ 42.482981][ T634] #0: ffffffffa57e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 42.483260][ T634] #1: ffffffffa57d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.483559][ T634] [ 42.483559][ T634] stack backtrace: [ 42.483738][ T634] CPU: 3 UID: 0 PID: 634 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 42.483963][ T634] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.484146][ T634] Call Trace: [ 42.484266][ T634] [ 42.484343][ T634] dump_stack_lvl+0x82/0xd0 [ 42.484496][ T634] print_deadlock_bug+0x40a/0x650 [ 42.484650][ T634] validate_chain+0x5bf/0xae0 [ 42.484801][ T634] ? __pfx_validate_chain+0x10/0x10 [ 42.484953][ T634] ? hlock_class+0x4e/0x130 [ 42.485099][ T634] ? mark_lock+0x38/0x3e0 [ 42.485210][ T634] __lock_acquire+0xb9a/0x1680 [ 42.485371][ T634] lock_acquire.part.0+0xeb/0x330 [ 42.485520][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 42.485700][ T634] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 42.485906][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.486054][ T634] ? trace_lock_acquire+0x14c/0x1f0 [ 42.486201][ T634] ? lock_acquire+0x32/0xc0 [ 42.486349][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 42.486532][ T634] down_read+0x9f/0x340 [ 42.486644][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 42.486833][ T634] ? __pfx_down_read+0x10/0x10 [ 42.486979][ T634] ? __lock_release+0x103/0x460 [ 42.487125][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 42.487273][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.487422][ T634] blocking_notifier_call_chain+0x50/0x90 [ 42.487569][ T634] __netdev_upper_dev_unlink+0xd9/0x220 [ 42.487717][ T634] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 42.487904][ T634] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 42.488052][ T634] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 42.488247][ T634] ? rtnl_is_locked+0x15/0x20 [ 42.488405][ T634] netdev_upper_dev_unlink+0x71/0xa0 [ 42.488574][ T634] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 42.488785][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 42.488963][ T634] ? mutex_is_locked+0x1c/0x60 [ 42.489125][ T634] ? rtnl_is_locked+0x15/0x20 [ 42.489271][ T634] ? netdev_master_upper_dev_get+0x13/0x120 [ 42.489454][ T634] vrf_device_event+0x78/0xe0 [vrf] [ 42.489604][ T634] notifier_call_chain+0xcd/0x150 [ 42.489753][ T634] blocking_notifier_call_chain+0x66/0x90 [ 42.489910][ T634] unregister_netdevice_many_notify+0xa7b/0x1580 [ 42.490094][ T634] ? __lock_release+0x103/0x460 [ 42.490249][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.490397][ T634] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 42.490578][ T634] ? hlock_class+0x4e/0x130 [ 42.490738][ T634] ? mark_held_locks+0x9e/0xe0 [ 42.490887][ T634] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 42.491050][ T634] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 42.491246][ T634] rtnl_dellink+0x348/0xa40 [ 42.491405][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.491574][ T634] ? find_held_lock+0x2c/0x110 [ 42.491722][ T634] ? __lock_release+0x103/0x460 [ 42.491869][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.492015][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.492159][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.492345][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.492498][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.492645][ T634] rtnetlink_rcv_msg+0x712/0xc10 [ 42.492790][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.492937][ T634] ? hlock_class+0x4e/0x130 [ 42.493080][ T634] ? mark_lock+0x38/0x3e0 [ 42.493191][ T634] ? __lock_acquire+0xb9a/0x1680 [ 42.493338][ T634] netlink_rcv_skb+0x130/0x360 [ 42.493491][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.493639][ T634] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 42.493788][ T634] ? netlink_deliver_tap+0x13e/0x340 [ 42.493937][ T634] ? netlink_deliver_tap+0xc3/0x340 [ 42.494085][ T634] netlink_unicast+0x44b/0x710 [ 42.494269][ T634] ? __pfx_netlink_unicast+0x10/0x10 [ 42.494415][ T634] ? find_held_lock+0x2c/0x110 [ 42.494565][ T634] netlink_sendmsg+0x723/0xbe0 [ 42.494713][ T634] ? __pfx_netlink_sendmsg+0x10/0x10 [ 42.494861][ T634] ____sys_sendmsg+0x7ac/0xa10 [ 42.495014][ T634] ? __pfx_____sys_sendmsg+0x10/0x10 [ 42.495158][ T634] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 42.495345][ T634] ___sys_sendmsg+0xee/0x170 [ 42.495492][ T634] ? __pfx____sys_sendmsg+0x10/0x10 [ 42.495644][ T634] ? kasan_save_stack+0x34/0x50 [ 42.495801][ T634] ? kasan_save_stack+0x24/0x50 [ 42.495946][ T634] ? __kasan_record_aux_stack+0x8e/0xa0 [ 42.496102][ T634] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 42.496285][ T634] ? __x64_sys_close+0x7c/0xd0 [ 42.496433][ T634] ? do_syscall_64+0xc1/0x1d0 [ 42.496580][ T634] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.496774][ T634] ? __lock_acquire+0xb9a/0x1680 [ 42.496930][ T634] ? find_held_lock+0x2c/0x110 [ 42.497077][ T634] ? __lock_release+0x103/0x460 [ 42.497234][ T634] ? __virt_addr_valid+0x22b/0x430 [ 42.497390][ T634] ? __pfx___lock_release+0x10/0x10 [ 42.497541][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.497718][ T634] __sys_sendmsg+0x109/0x1a0 [ 42.497864][ T634] ? __pfx___sys_sendmsg+0x10/0x10 [ 42.498027][ T634] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 42.498215][ T634] do_syscall_64+0xc1/0x1d0 [ 42.498360][ T634] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.498540][ T634] RIP: 0033:0x7f283db039a7 [ 42.498692][ T634] 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 [ 42.499224][ T634] RSP: 002b:00007ffd858e07e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.499445][ T634] RAX: ffffffffffffffda RBX: 00007ffd858e0f10 RCX: 00007f283db039a7 [ 42.499664][ T634] RDX: 0000000000000000 RSI: 00007ffd858e0850 RDI: 0000000000000005 [ 42.499885][ T634] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.500114][ T634] R10: 00007f283d9c1ef8 R11: 0000000000000246 R12: 0000000000000002 [ 42.500335][ T634] R13: 0000000067792f0b R14: 0000000000498600 R15: 0000000000000000 [ 42.500556][ T634]