[ 10.795337][ T249] ip (249) used greatest stack depth: 23832 bytes left [ 15.750557][ T332] 8021q: 802.1Q VLAN Support v1.8 [ 16.205140][ T338] gre: GRE over IPv4 demultiplexor driver [ 16.226302][ T338] ip_gre: GRE over IPv4 tunneling driver [ 16.551330][ T345] ip (345) used greatest stack depth: 23520 bytes left [ 29.690978][ T442] [ 29.691120][ T442] ============================================ [ 29.691323][ T442] WARNING: possible recursive locking detected [ 29.691507][ T442] 6.13.0-rc5-virtme #1 Not tainted [ 29.691667][ T442] -------------------------------------------- [ 29.691852][ T442] ip/442 is trying to acquire lock: [ 29.692005][ T442] ffffffff9fdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.692321][ T442] [ 29.692321][ T442] but task is already holding lock: [ 29.692538][ T442] ffffffff9fdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.692850][ T442] [ 29.692850][ T442] other info that might help us debug this: [ 29.693068][ T442] Possible unsafe locking scenario: [ 29.693068][ T442] [ 29.693294][ T442] CPU0 [ 29.693409][ T442] ---- [ 29.693520][ T442] lock((netdev_chain).rwsem); [ 29.693671][ T442] lock((netdev_chain).rwsem); [ 29.693823][ T442] [ 29.693823][ T442] *** DEADLOCK *** [ 29.693823][ T442] [ 29.694044][ T442] May be due to missing lock nesting notation [ 29.694044][ T442] [ 29.694260][ T442] 2 locks held by ip/442: [ 29.694373][ T442] #0: ffffffff9fde7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.694658][ T442] #1: ffffffff9fdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.694965][ T442] [ 29.694965][ T442] stack backtrace: [ 29.695149][ T442] CPU: 3 UID: 0 PID: 442 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.695379][ T442] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.695571][ T442] Call Trace: [ 29.695691][ T442] [ 29.695771][ T442] dump_stack_lvl+0x82/0xd0 [ 29.695927][ T442] print_deadlock_bug+0x40a/0x650 [ 29.696080][ T442] validate_chain+0x5bf/0xae0 [ 29.696230][ T442] ? __pfx_validate_chain+0x10/0x10 [ 29.696384][ T442] ? hlock_class+0x4e/0x130 [ 29.696537][ T442] ? mark_lock+0x38/0x3e0 [ 29.696657][ T442] __lock_acquire+0xb9a/0x1680 [ 29.696812][ T442] lock_acquire.part.0+0xeb/0x330 [ 29.696968][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.697155][ T442] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.697344][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.697494][ T442] ? trace_lock_acquire+0x14c/0x1f0 [ 29.697644][ T442] ? lock_acquire+0x32/0xc0 [ 29.697797][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.697984][ T442] down_read+0x9f/0x340 [ 29.698101][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.698286][ T442] ? __pfx_down_read+0x10/0x10 [ 29.698435][ T442] ? __lock_release+0x103/0x460 [ 29.698582][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 29.698734][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.698890][ T442] blocking_notifier_call_chain+0x50/0x90 [ 29.699040][ T442] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.699193][ T442] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.699392][ T442] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.699542][ T442] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.699731][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.699890][ T442] netdev_upper_dev_unlink+0x71/0xa0 [ 29.700042][ T442] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.700226][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 29.700381][ T442] ? mutex_is_locked+0x1c/0x60 [ 29.700537][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.700686][ T442] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.700872][ T442] vrf_device_event+0x78/0xe0 [vrf] [ 29.701032][ T442] notifier_call_chain+0xcd/0x150 [ 29.701184][ T442] blocking_notifier_call_chain+0x66/0x90 [ 29.701335][ T442] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.701525][ T442] ? find_held_lock+0x2c/0x110 [ 29.701677][ T442] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.701863][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.702014][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.702172][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.702323][ T442] ? unregister_netdevice_queue+0x70/0x410 [ 29.702516][ T442] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.702704][ T442] ? net_generic+0xbb/0x1f0 [ 29.702856][ T442] rtnl_dellink+0x348/0xa40 [ 29.703009][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.703183][ T442] ? find_held_lock+0x2c/0x110 [ 29.703341][ T442] ? __lock_release+0x103/0x460 [ 29.703493][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.703644][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.703800][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.703952][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.704102][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.704255][ T442] rtnetlink_rcv_msg+0x712/0xc10 [ 29.704414][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.704565][ T442] ? hlock_class+0x4e/0x130 [ 29.704713][ T442] ? mark_lock+0x38/0x3e0 [ 29.704831][ T442] ? __lock_acquire+0xb9a/0x1680 [ 29.704982][ T442] netlink_rcv_skb+0x130/0x360 [ 29.705137][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.705289][ T442] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.705454][ T442] ? netlink_deliver_tap+0x13e/0x340 [ 29.705606][ T442] ? netlink_deliver_tap+0xc3/0x340 [ 29.705757][ T442] netlink_unicast+0x44b/0x710 [ 29.705908][ T442] ? __pfx_netlink_unicast+0x10/0x10 [ 29.706060][ T442] ? find_held_lock+0x2c/0x110 [ 29.706216][ T442] netlink_sendmsg+0x723/0xbe0 [ 29.706367][ T442] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.706523][ T442] ____sys_sendmsg+0x7ac/0xa10 [ 29.706681][ T442] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.706835][ T442] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.707027][ T442] ___sys_sendmsg+0xee/0x170 [ 29.707178][ T442] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.707328][ T442] ? kasan_save_stack+0x34/0x50 [ 29.707481][ T442] ? kasan_save_stack+0x24/0x50 [ 29.707631][ T442] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.707791][ T442] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.707980][ T442] ? __x64_sys_close+0x7c/0xd0 [ 29.708131][ T442] ? do_syscall_64+0xc1/0x1d0 [ 29.708282][ T442] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.708472][ T442] ? __lock_acquire+0xb9a/0x1680 [ 29.708629][ T442] ? find_held_lock+0x2c/0x110 [ 29.708780][ T442] ? __lock_release+0x103/0x460 [ 29.708933][ T442] ? __virt_addr_valid+0x22b/0x430 [ 29.709090][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.709242][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.709434][ T442] __sys_sendmsg+0x109/0x1a0 [ 29.709585][ T442] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.709735][ T442] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.709925][ T442] do_syscall_64+0xc1/0x1d0 [ 29.710080][ T442] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.710266][ T442] RIP: 0033:0x7fe624dd19a7 [ 29.710428][ T442] 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 [ 29.710963][ T442] RSP: 002b:00007ffda0f29208 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.711197][ T442] RAX: ffffffffffffffda RBX: 00007ffda0f29930 RCX: 00007fe624dd19a7 [ 29.711422][ T442] RDX: 0000000000000000 RSI: 00007ffda0f29270 RDI: 0000000000000005 [ 29.711648][ T442] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.711876][ T442] R10: 00007fe624c8fef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.712109][ T442] R13: 0000000067792f84 R14: 0000000000498600 R15: 0000000000000000 [ 29.712344][ T442]