[ 10.970313][ T261] ip (261) used greatest stack depth: 23248 bytes left [ 14.397581][ T313] 8021q: 802.1Q VLAN Support v1.8 [ 14.737173][ T318] gre: GRE over IPv4 demultiplexor driver [ 14.750032][ T318] ip_gre: GRE over IPv4 tunneling driver [ 32.421263][ T416] [ 32.421446][ T416] ============================================ [ 32.421675][ T416] WARNING: possible recursive locking detected [ 32.421905][ T416] 6.13.0-rc5-virtme #1 Not tainted [ 32.422082][ T416] -------------------------------------------- [ 32.422305][ T416] ip/416 is trying to acquire lock: [ 32.422487][ T416] ffffffffaa1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.422849][ T416] [ 32.422849][ T416] but task is already holding lock: [ 32.423112][ T416] ffffffffaa1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.423460][ T416] [ 32.423460][ T416] other info that might help us debug this: [ 32.423717][ T416] Possible unsafe locking scenario: [ 32.423717][ T416] [ 32.423972][ T416] CPU0 [ 32.424109][ T416] ---- [ 32.424231][ T416] lock((netdev_chain).rwsem); [ 32.424390][ T416] lock((netdev_chain).rwsem); [ 32.424553][ T416] [ 32.424553][ T416] *** DEADLOCK *** [ 32.424553][ T416] [ 32.424800][ T416] May be due to missing lock nesting notation [ 32.424800][ T416] [ 32.425055][ T416] 2 locks held by ip/416: [ 32.425187][ T416] #0: ffffffffaa1e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.425496][ T416] #1: ffffffffaa1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.425843][ T416] [ 32.425843][ T416] stack backtrace: [ 32.426047][ T416] CPU: 2 UID: 0 PID: 416 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.426289][ T416] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.426510][ T416] Call Trace: [ 32.426652][ T416] [ 32.426739][ T416] dump_stack_lvl+0x82/0xd0 [ 32.426920][ T416] print_deadlock_bug+0x40a/0x650 [ 32.427097][ T416] validate_chain+0x5bf/0xae0 [ 32.427281][ T416] ? __pfx_validate_chain+0x10/0x10 [ 32.427449][ T416] ? hlock_class+0x4e/0x130 [ 32.427607][ T416] ? mark_lock+0x38/0x3e0 [ 32.427742][ T416] __lock_acquire+0xb9a/0x1680 [ 32.427912][ T416] lock_acquire.part.0+0xeb/0x330 [ 32.428074][ T416] ? blocking_notifier_call_chain+0x50/0x90 [ 32.428275][ T416] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.428485][ T416] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.428651][ T416] ? trace_lock_acquire+0x14c/0x1f0 [ 32.428826][ T416] ? lock_acquire+0x32/0xc0 [ 32.428992][ T416] ? blocking_notifier_call_chain+0x50/0x90 [ 32.429205][ T416] down_read+0x9f/0x340 [ 32.429340][ T416] ? blocking_notifier_call_chain+0x50/0x90 [ 32.429545][ T416] ? __pfx_down_read+0x10/0x10 [ 32.429721][ T416] ? __lock_release+0x103/0x460 [ 32.429887][ T416] ? netconsole_netdev_event+0x2c1/0x620 [ 32.430052][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.430213][ T416] blocking_notifier_call_chain+0x50/0x90 [ 32.430375][ T416] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.430546][ T416] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.430759][ T416] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.430939][ T416] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.431158][ T416] ? rtnl_is_locked+0x15/0x20 [ 32.431336][ T416] netdev_upper_dev_unlink+0x71/0xa0 [ 32.431504][ T416] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.431703][ T416] ? netconsole_netdev_event+0x2c1/0x620 [ 32.431861][ T416] ? mutex_is_locked+0x1c/0x60 [ 32.432022][ T416] ? rtnl_is_locked+0x15/0x20 [ 32.432185][ T416] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.432394][ T416] vrf_device_event+0x78/0xe0 [vrf] [ 32.432579][ T416] notifier_call_chain+0xcd/0x150 [ 32.432755][ T416] blocking_notifier_call_chain+0x66/0x90 [ 32.432926][ T416] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.433136][ T416] ? __lock_release+0x103/0x460 [ 32.433311][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.433477][ T416] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.433672][ T416] ? hlock_class+0x4e/0x130 [ 32.433853][ T416] ? mark_held_locks+0x9e/0xe0 [ 32.434019][ T416] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.434199][ T416] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.434405][ T416] rtnl_dellink+0x348/0xa40 [ 32.434574][ T416] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.434748][ T416] ? find_held_lock+0x2c/0x110 [ 32.434908][ T416] ? __lock_release+0x103/0x460 [ 32.435066][ T416] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.435226][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.435394][ T416] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.435557][ T416] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.435730][ T416] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.435889][ T416] rtnetlink_rcv_msg+0x712/0xc10 [ 32.436048][ T416] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.436207][ T416] ? hlock_class+0x4e/0x130 [ 32.436366][ T416] ? mark_lock+0x38/0x3e0 [ 32.436488][ T416] ? __lock_acquire+0xb9a/0x1680 [ 32.436658][ T416] netlink_rcv_skb+0x130/0x360 [ 32.436824][ T416] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.436992][ T416] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.437170][ T416] ? netlink_deliver_tap+0x13e/0x340 [ 32.437346][ T416] ? netlink_deliver_tap+0xc3/0x340 [ 32.437518][ T416] netlink_unicast+0x44b/0x710 [ 32.437690][ T416] ? __pfx_netlink_unicast+0x10/0x10 [ 32.437849][ T416] ? find_held_lock+0x2c/0x110 [ 32.438011][ T416] netlink_sendmsg+0x723/0xbe0 [ 32.438176][ T416] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.438339][ T416] ____sys_sendmsg+0x7ac/0xa10 [ 32.438500][ T416] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.438660][ T416] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.438863][ T416] ___sys_sendmsg+0xee/0x170 [ 32.439023][ T416] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.439183][ T416] ? kasan_save_stack+0x34/0x50 [ 32.439351][ T416] ? kasan_save_stack+0x24/0x50 [ 32.439509][ T416] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.439672][ T416] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.439875][ T416] ? __x64_sys_close+0x7c/0xd0 [ 32.440036][ T416] ? do_syscall_64+0xc1/0x1d0 [ 32.440197][ T416] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.440399][ T416] ? __lock_acquire+0xb9a/0x1680 [ 32.440571][ T416] ? find_held_lock+0x2c/0x110 [ 32.440732][ T416] ? __lock_release+0x103/0x460 [ 32.440889][ T416] ? __virt_addr_valid+0x22b/0x430 [ 32.441049][ T416] ? __pfx___lock_release+0x10/0x10 [ 32.441210][ T416] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.441382][ T416] __sys_sendmsg+0x109/0x1a0 [ 32.441530][ T416] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.441681][ T416] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.441871][ T416] do_syscall_64+0xc1/0x1d0 [ 32.442017][ T416] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.442200][ T416] RIP: 0033:0x7fbb028489a7 [ 32.442356][ T416] 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 [ 32.442942][ T416] RSP: 002b:00007ffe430674c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.443185][ T416] RAX: ffffffffffffffda RBX: 00007ffe43067bf0 RCX: 00007fbb028489a7 [ 32.443429][ T416] RDX: 0000000000000000 RSI: 00007ffe43067530 RDI: 0000000000000005 [ 32.443670][ T416] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.443919][ T416] R10: 00007fbb02706ef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.444163][ T416] R13: 00000000677957e0 R14: 0000000000498600 R15: 0000000000000000 [ 32.444408][ T416]