[ 286.515846][ T1796] ip (1796) used greatest stack depth: 23584 bytes left [ 289.569007][ T1842] gre: GRE over IPv4 demultiplexor driver [ 289.635499][ T1842] ip6_gre: GRE over IPv6 tunneling driver [ 291.166771][ T1863] 8021q: 802.1Q VLAN Support v1.8 [ 294.363375][ T1901] GACT probability NOT on [ 459.613978][ T2112] [ 459.614159][ T2112] ============================================ [ 459.614372][ T2112] WARNING: possible recursive locking detected [ 459.614574][ T2112] 6.13.0-rc5-virtme #1 Not tainted [ 459.614745][ T2112] -------------------------------------------- [ 459.614947][ T2112] ip/2112 is trying to acquire lock: [ 459.615106][ T2112] ffffffffb1fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 459.615454][ T2112] [ 459.615454][ T2112] but task is already holding lock: [ 459.615706][ T2112] ffffffffb1fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 459.616038][ T2112] [ 459.616038][ T2112] other info that might help us debug this: [ 459.616272][ T2112] Possible unsafe locking scenario: [ 459.616272][ T2112] [ 459.616505][ T2112] CPU0 [ 459.616629][ T2112] ---- [ 459.616748][ T2112] lock((netdev_chain).rwsem); [ 459.616913][ T2112] lock((netdev_chain).rwsem); [ 459.617077][ T2112] [ 459.617077][ T2112] *** DEADLOCK *** [ 459.617077][ T2112] [ 459.617315][ T2112] May be due to missing lock nesting notation [ 459.617315][ T2112] [ 459.617554][ T2112] 2 locks held by ip/2112: [ 459.617714][ T2112] #0: ffffffffb1fe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 459.618093][ T2112] #1: ffffffffb1fd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 459.618586][ T2112] [ 459.618586][ T2112] stack backtrace: [ 459.618858][ T2112] CPU: 2 UID: 0 PID: 2112 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 459.619196][ T2112] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 459.619500][ T2112] Call Trace: [ 459.619693][ T2112] [ 459.619822][ T2112] dump_stack_lvl+0x82/0xd0 [ 459.620086][ T2112] print_deadlock_bug+0x40a/0x650 [ 459.620344][ T2112] validate_chain+0x5bf/0xae0 [ 459.620601][ T2112] ? __pfx_validate_chain+0x10/0x10 [ 459.620851][ T2112] ? hlock_class+0x4e/0x130 [ 459.621114][ T2112] ? mark_lock+0x38/0x3e0 [ 459.621309][ T2112] __lock_acquire+0xb9a/0x1680 [ 459.621561][ T2112] lock_acquire.part.0+0xeb/0x330 [ 459.621812][ T2112] ? blocking_notifier_call_chain+0x50/0x90 [ 459.622138][ T2112] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 459.622458][ T2112] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 459.622708][ T2112] ? trace_lock_acquire+0x14c/0x1f0 [ 459.622967][ T2112] ? lock_acquire+0x32/0xc0 [ 459.623215][ T2112] ? blocking_notifier_call_chain+0x50/0x90 [ 459.623532][ T2112] down_read+0x9f/0x340 [ 459.623723][ T2112] ? blocking_notifier_call_chain+0x50/0x90 [ 459.624052][ T2112] ? __pfx_down_read+0x10/0x10 [ 459.624301][ T2112] ? __lock_release+0x103/0x460 [ 459.624556][ T2112] ? netconsole_netdev_event+0x2c1/0x620 [ 459.624809][ T2112] ? __pfx___lock_release+0x10/0x10 [ 459.625047][ T2112] blocking_notifier_call_chain+0x50/0x90 [ 459.625291][ T2112] __netdev_upper_dev_unlink+0xd9/0x220 [ 459.625494][ T2112] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 459.625704][ T2112] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 459.625867][ T2112] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 459.626069][ T2112] ? rtnl_is_locked+0x15/0x20 [ 459.626247][ T2112] netdev_upper_dev_unlink+0x71/0xa0 [ 459.626410][ T2112] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 459.626608][ T2112] ? netconsole_netdev_event+0x2c1/0x620 [ 459.626782][ T2112] ? mutex_is_locked+0x1c/0x60 [ 459.626945][ T2112] ? rtnl_is_locked+0x15/0x20 [ 459.627112][ T2112] ? netdev_master_upper_dev_get+0x13/0x120 [ 459.627328][ T2112] vrf_device_event+0x78/0xe0 [vrf] [ 459.627494][ T2112] notifier_call_chain+0xcd/0x150 [ 459.627654][ T2112] blocking_notifier_call_chain+0x66/0x90 [ 459.627819][ T2112] unregister_netdevice_many_notify+0xa7b/0x1580 [ 459.628030][ T2112] ? hlock_class+0x4e/0x130 [ 459.628200][ T2112] ? mark_lock+0x38/0x3e0 [ 459.628341][ T2112] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 459.628541][ T2112] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 459.628741][ T2112] ? kfree+0xf3/0x330 [ 459.628866][ T2112] ? vlan_vid_del+0x310/0x5e0 [ 459.629032][ T2112] ? vlan_vid_del+0x310/0x5e0 [ 459.629212][ T2112] rtnl_dellink+0x348/0xa40 [ 459.629378][ T2112] ? __pfx_rtnl_dellink+0x10/0x10 [ 459.629555][ T2112] ? find_held_lock+0x2c/0x110 [ 459.629716][ T2112] ? __lock_release+0x103/0x460 [ 459.629875][ T2112] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 459.630035][ T2112] ? __pfx___lock_release+0x10/0x10 [ 459.630202][ T2112] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 459.630370][ T2112] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 459.630530][ T2112] ? __pfx_rtnl_dellink+0x10/0x10 [ 459.630696][ T2112] rtnetlink_rcv_msg+0x712/0xc10 [ 459.630862][ T2112] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 459.631023][ T2112] ? hlock_class+0x4e/0x130 [ 459.631191][ T2112] ? mark_lock+0x38/0x3e0 [ 459.631313][ T2112] ? __lock_acquire+0xb9a/0x1680 [ 459.631476][ T2112] netlink_rcv_skb+0x130/0x360 [ 459.631644][ T2112] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 459.631809][ T2112] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 459.631994][ T2112] ? netlink_deliver_tap+0x13e/0x340 [ 459.632177][ T2112] ? netlink_deliver_tap+0xc3/0x340 [ 459.632377][ T2112] netlink_unicast+0x44b/0x710 [ 459.632539][ T2112] ? __pfx_netlink_unicast+0x10/0x10 [ 459.632701][ T2112] ? find_held_lock+0x2c/0x110 [ 459.632871][ T2112] netlink_sendmsg+0x723/0xbe0 [ 459.633034][ T2112] ? __pfx_netlink_sendmsg+0x10/0x10 [ 459.633206][ T2112] ____sys_sendmsg+0x7ac/0xa10 [ 459.633371][ T2112] ? __pfx_____sys_sendmsg+0x10/0x10 [ 459.633529][ T2112] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 459.633733][ T2112] ___sys_sendmsg+0xee/0x170 [ 459.633892][ T2112] ? __pfx____sys_sendmsg+0x10/0x10 [ 459.634061][ T2112] ? kasan_save_stack+0x34/0x50 [ 459.634231][ T2112] ? kasan_save_stack+0x24/0x50 [ 459.634389][ T2112] ? __kasan_record_aux_stack+0x8e/0xa0 [ 459.634552][ T2112] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 459.634754][ T2112] ? __x64_sys_close+0x7c/0xd0 [ 459.634919][ T2112] ? do_syscall_64+0xc1/0x1d0 [ 459.635083][ T2112] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 459.635311][ T2112] ? __lock_acquire+0xb9a/0x1680 [ 459.635476][ T2112] ? find_held_lock+0x2c/0x110 [ 459.635638][ T2112] ? __lock_release+0x103/0x460 [ 459.635821][ T2112] ? __virt_addr_valid+0x22b/0x430 [ 459.635986][ T2112] ? __pfx___lock_release+0x10/0x10 [ 459.636152][ T2112] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 459.636314][ T2112] __sys_sendmsg+0x109/0x1a0 [ 459.636481][ T2112] ? __pfx___sys_sendmsg+0x10/0x10 [ 459.636641][ T2112] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 459.636845][ T2112] do_syscall_64+0xc1/0x1d0 [ 459.637016][ T2112] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 459.637228][ T2112] RIP: 0033:0x7f11e6f919a7 [ 459.637400][ T2112] 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 [ 459.637965][ T2112] RSP: 002b:00007fff68903238 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 459.638261][ T2112] RAX: ffffffffffffffda RBX: 00007fff68903960 RCX: 00007f11e6f919a7 [ 459.638501][ T2112] RDX: 0000000000000000 RSI: 00007fff689032a0 RDI: 0000000000000005 [ 459.638752][ T2112] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 459.639002][ T2112] R10: 00007f11e6e4fef8 R11: 0000000000000246 R12: 0000000000000002 [ 459.639259][ T2112] R13: 0000000067792934 R14: 0000000000498600 R15: 0000000000000000 [ 459.639505][ T2112]