[ 10.638734][ T249] ip (249) used greatest stack depth: 23792 bytes left [ 14.401690][ T315] 8021q: 802.1Q VLAN Support v1.8 [ 14.770439][ T320] gre: GRE over IPv4 demultiplexor driver [ 14.784261][ T320] ip_gre: GRE over IPv4 tunneling driver [ 16.793156][ T349] ip (349) used greatest stack depth: 23536 bytes left [ 32.337843][ T419] [ 32.338010][ T419] ============================================ [ 32.338217][ T419] WARNING: possible recursive locking detected [ 32.338503][ T419] 6.13.0-rc5-virtme #1 Not tainted [ 32.338666][ T419] -------------------------------------------- [ 32.338874][ T419] ip/419 is trying to acquire lock: [ 32.339033][ T419] ffffffff99bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.339442][ T419] [ 32.339442][ T419] but task is already holding lock: [ 32.339728][ T419] ffffffff99bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.340119][ T419] [ 32.340119][ T419] other info that might help us debug this: [ 32.340414][ T419] Possible unsafe locking scenario: [ 32.340414][ T419] [ 32.340720][ T419] CPU0 [ 32.340888][ T419] ---- [ 32.341022][ T419] lock((netdev_chain).rwsem); [ 32.341235][ T419] lock((netdev_chain).rwsem); [ 32.341417][ T419] [ 32.341417][ T419] *** DEADLOCK *** [ 32.341417][ T419] [ 32.341725][ T419] May be due to missing lock nesting notation [ 32.341725][ T419] [ 32.342050][ T419] 2 locks held by ip/419: [ 32.342253][ T419] #0: ffffffff99be7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.342592][ T419] #1: ffffffff99bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.342958][ T419] [ 32.342958][ T419] stack backtrace: [ 32.343207][ T419] CPU: 3 UID: 0 PID: 419 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.343484][ T419] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.343782][ T419] Call Trace: [ 32.344004][ T419] [ 32.344122][ T419] dump_stack_lvl+0x82/0xd0 [ 32.344356][ T419] print_deadlock_bug+0x40a/0x650 [ 32.344591][ T419] validate_chain+0x5bf/0xae0 [ 32.344765][ T419] ? __pfx_validate_chain+0x10/0x10 [ 32.344942][ T419] ? hlock_class+0x4e/0x130 [ 32.345101][ T419] ? mark_lock+0x38/0x3e0 [ 32.345213][ T419] __lock_acquire+0xb9a/0x1680 [ 32.345441][ T419] lock_acquire.part.0+0xeb/0x330 [ 32.345655][ T419] ? blocking_notifier_call_chain+0x50/0x90 [ 32.345888][ T419] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.346189][ T419] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.346390][ T419] ? trace_lock_acquire+0x14c/0x1f0 [ 32.346591][ T419] ? lock_acquire+0x32/0xc0 [ 32.346803][ T419] ? blocking_notifier_call_chain+0x50/0x90 [ 32.347035][ T419] down_read+0x9f/0x340 [ 32.347164][ T419] ? blocking_notifier_call_chain+0x50/0x90 [ 32.347365][ T419] ? __pfx_down_read+0x10/0x10 [ 32.347538][ T419] ? __lock_release+0x103/0x460 [ 32.347755][ T419] ? netconsole_netdev_event+0x2c1/0x620 [ 32.347968][ T419] ? __pfx___lock_release+0x10/0x10 [ 32.348177][ T419] blocking_notifier_call_chain+0x50/0x90 [ 32.348394][ T419] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.348616][ T419] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.348818][ T419] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.348981][ T419] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.349185][ T419] ? rtnl_is_locked+0x15/0x20 [ 32.349352][ T419] netdev_upper_dev_unlink+0x71/0xa0 [ 32.349573][ T419] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.349759][ T419] ? netconsole_netdev_event+0x2c1/0x620 [ 32.349913][ T419] ? mutex_is_locked+0x1c/0x60 [ 32.350061][ T419] ? rtnl_is_locked+0x15/0x20 [ 32.350214][ T419] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.350400][ T419] vrf_device_event+0x78/0xe0 [vrf] [ 32.350562][ T419] notifier_call_chain+0xcd/0x150 [ 32.350718][ T419] blocking_notifier_call_chain+0x66/0x90 [ 32.350881][ T419] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.351129][ T419] ? __lock_release+0x103/0x460 [ 32.351287][ T419] ? __pfx___lock_release+0x10/0x10 [ 32.351458][ T419] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.351657][ T419] ? hlock_class+0x4e/0x130 [ 32.351823][ T419] ? mark_held_locks+0x9e/0xe0 [ 32.351996][ T419] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.352211][ T419] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.352478][ T419] rtnl_dellink+0x348/0xa40 [ 32.352648][ T419] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.352833][ T419] ? find_held_lock+0x2c/0x110 [ 32.353052][ T419] ? __lock_release+0x103/0x460 [ 32.353260][ T419] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.353494][ T419] ? __pfx___lock_release+0x10/0x10 [ 32.353718][ T419] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.353894][ T419] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.354083][ T419] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.354252][ T419] rtnetlink_rcv_msg+0x712/0xc10 [ 32.354424][ T419] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.354639][ T419] ? hlock_class+0x4e/0x130 [ 32.354808][ T419] ? mark_lock+0x38/0x3e0 [ 32.354931][ T419] ? __lock_acquire+0xb9a/0x1680 [ 32.355096][ T419] netlink_rcv_skb+0x130/0x360 [ 32.355260][ T419] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.355481][ T419] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.355692][ T419] ? netlink_deliver_tap+0x13e/0x340 [ 32.355860][ T419] ? netlink_deliver_tap+0xc3/0x340 [ 32.356034][ T419] netlink_unicast+0x44b/0x710 [ 32.356251][ T419] ? __pfx_netlink_unicast+0x10/0x10 [ 32.356462][ T419] ? find_held_lock+0x2c/0x110 [ 32.356643][ T419] netlink_sendmsg+0x723/0xbe0 [ 32.356849][ T419] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.357019][ T419] ____sys_sendmsg+0x7ac/0xa10 [ 32.357237][ T419] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.357417][ T419] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.357643][ T419] ___sys_sendmsg+0xee/0x170 [ 32.357808][ T419] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.357970][ T419] ? kasan_save_stack+0x34/0x50 [ 32.358193][ T419] ? kasan_save_stack+0x24/0x50 [ 32.358396][ T419] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.358607][ T419] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.358820][ T419] ? __x64_sys_close+0x7c/0xd0 [ 32.358985][ T419] ? do_syscall_64+0xc1/0x1d0 [ 32.359152][ T419] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.359414][ T419] ? __lock_acquire+0xb9a/0x1680 [ 32.359589][ T419] ? find_held_lock+0x2c/0x110 [ 32.359751][ T419] ? __lock_release+0x103/0x460 [ 32.359956][ T419] ? __virt_addr_valid+0x22b/0x430 [ 32.360194][ T419] ? __pfx___lock_release+0x10/0x10 [ 32.360364][ T419] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.360536][ T419] __sys_sendmsg+0x109/0x1a0 [ 32.360757][ T419] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.360919][ T419] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.361183][ T419] do_syscall_64+0xc1/0x1d0 [ 32.361347][ T419] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.361576][ T419] RIP: 0033:0x7fec9a7d29a7 [ 32.361798][ T419] 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 [ 32.362432][ T419] RSP: 002b:00007ffc2c63a008 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.362701][ T419] RAX: ffffffffffffffda RBX: 00007ffc2c63a730 RCX: 00007fec9a7d29a7 [ 32.362955][ T419] RDX: 0000000000000000 RSI: 00007ffc2c63a070 RDI: 0000000000000005 [ 32.363253][ T419] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.363555][ T419] R10: 00007fec9a690ef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.363847][ T419] R13: 0000000067792f52 R14: 0000000000498600 R15: 0000000000000000 [ 32.364099][ T419]