[ 24.860367][ T425] ip (425) used greatest stack depth: 23864 bytes left [ 26.411543][ T447] gre: GRE over IPv4 demultiplexor driver [ 26.464134][ T447] ip6_gre: GRE over IPv6 tunneling driver [ 27.953988][ T468] 8021q: 802.1Q VLAN Support v1.8 [ 30.958223][ T506] GACT probability NOT on [ 30.995398][ T504] tc (504) used greatest stack depth: 23488 bytes left [ 188.701330][ T717] [ 188.701476][ T717] ============================================ [ 188.701672][ T717] WARNING: possible recursive locking detected [ 188.701867][ T717] 6.13.0-rc5-virtme #1 Not tainted [ 188.702076][ T717] -------------------------------------------- [ 188.702305][ T717] ip/717 is trying to acquire lock: [ 188.702471][ T717] ffffffffba3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 188.702880][ T717] [ 188.702880][ T717] but task is already holding lock: [ 188.703109][ T717] ffffffffba3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 188.703411][ T717] [ 188.703411][ T717] other info that might help us debug this: [ 188.703622][ T717] Possible unsafe locking scenario: [ 188.703622][ T717] [ 188.703871][ T717] CPU0 [ 188.703980][ T717] ---- [ 188.704091][ T717] lock((netdev_chain).rwsem); [ 188.704241][ T717] lock((netdev_chain).rwsem); [ 188.704393][ T717] [ 188.704393][ T717] *** DEADLOCK *** [ 188.704393][ T717] [ 188.704612][ T717] May be due to missing lock nesting notation [ 188.704612][ T717] [ 188.704849][ T717] 2 locks held by ip/717: [ 188.705015][ T717] #0: ffffffffba3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 188.705295][ T717] #1: ffffffffba3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 188.705594][ T717] [ 188.705594][ T717] stack backtrace: [ 188.705786][ T717] CPU: 2 UID: 0 PID: 717 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 188.706061][ T717] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 188.706275][ T717] Call Trace: [ 188.706406][ T717] [ 188.706490][ T717] dump_stack_lvl+0x82/0xd0 [ 188.706662][ T717] print_deadlock_bug+0x40a/0x650 [ 188.706883][ T717] validate_chain+0x5bf/0xae0 [ 188.707072][ T717] ? __pfx_validate_chain+0x10/0x10 [ 188.707271][ T717] ? hlock_class+0x4e/0x130 [ 188.707469][ T717] ? mark_lock+0x38/0x3e0 [ 188.707584][ T717] __lock_acquire+0xb9a/0x1680 [ 188.707770][ T717] lock_acquire.part.0+0xeb/0x330 [ 188.708013][ T717] ? blocking_notifier_call_chain+0x50/0x90 [ 188.708260][ T717] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 188.708444][ T717] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 188.708603][ T717] ? trace_lock_acquire+0x14c/0x1f0 [ 188.708761][ T717] ? lock_acquire+0x32/0xc0 [ 188.708907][ T717] ? blocking_notifier_call_chain+0x50/0x90 [ 188.709096][ T717] down_read+0x9f/0x340 [ 188.709222][ T717] ? blocking_notifier_call_chain+0x50/0x90 [ 188.709403][ T717] ? __pfx_down_read+0x10/0x10 [ 188.709550][ T717] ? __lock_release+0x103/0x460 [ 188.709701][ T717] ? netconsole_netdev_event+0x2c1/0x620 [ 188.709848][ T717] ? __pfx___lock_release+0x10/0x10 [ 188.709997][ T717] blocking_notifier_call_chain+0x50/0x90 [ 188.710143][ T717] __netdev_upper_dev_unlink+0xd9/0x220 [ 188.710307][ T717] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 188.710487][ T717] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 188.710633][ T717] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 188.710831][ T717] ? rtnl_is_locked+0x15/0x20 [ 188.710983][ T717] netdev_upper_dev_unlink+0x71/0xa0 [ 188.711127][ T717] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 188.711318][ T717] ? netconsole_netdev_event+0x2c1/0x620 [ 188.711463][ T717] ? mutex_is_locked+0x1c/0x60 [ 188.711609][ T717] ? rtnl_is_locked+0x15/0x20 [ 188.711766][ T717] ? netdev_master_upper_dev_get+0x13/0x120 [ 188.711953][ T717] vrf_device_event+0x78/0xe0 [vrf] [ 188.712103][ T717] notifier_call_chain+0xcd/0x150 [ 188.712250][ T717] blocking_notifier_call_chain+0x66/0x90 [ 188.712405][ T717] unregister_netdevice_many_notify+0xa7b/0x1580 [ 188.712586][ T717] ? hlock_class+0x4e/0x130 [ 188.712744][ T717] ? mark_lock+0x38/0x3e0 [ 188.712857][ T717] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 188.713037][ T717] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 188.713217][ T717] ? kfree+0xf3/0x330 [ 188.713330][ T717] ? vlan_vid_del+0x310/0x5e0 [ 188.713484][ T717] ? vlan_vid_del+0x310/0x5e0 [ 188.713635][ T717] rtnl_dellink+0x348/0xa40 [ 188.713795][ T717] ? __pfx_rtnl_dellink+0x10/0x10 [ 188.713952][ T717] ? find_held_lock+0x2c/0x110 [ 188.714100][ T717] ? __lock_release+0x103/0x460 [ 188.714245][ T717] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 188.714388][ T717] ? __pfx___lock_release+0x10/0x10 [ 188.714534][ T717] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 188.714698][ T717] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 188.714850][ T717] ? __pfx_rtnl_dellink+0x10/0x10 [ 188.714995][ T717] rtnetlink_rcv_msg+0x712/0xc10 [ 188.715139][ T717] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 188.715282][ T717] ? hlock_class+0x4e/0x130 [ 188.715427][ T717] ? mark_lock+0x38/0x3e0 [ 188.715537][ T717] ? __lock_acquire+0xb9a/0x1680 [ 188.715700][ T717] netlink_rcv_skb+0x130/0x360 [ 188.715938][ T717] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 188.716169][ T717] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 188.716364][ T717] ? netlink_deliver_tap+0x13e/0x340 [ 188.716514][ T717] ? netlink_deliver_tap+0xc3/0x340 [ 188.716675][ T717] netlink_unicast+0x44b/0x710 [ 188.716837][ T717] ? __pfx_netlink_unicast+0x10/0x10 [ 188.716991][ T717] ? find_held_lock+0x2c/0x110 [ 188.717163][ T717] netlink_sendmsg+0x723/0xbe0 [ 188.717353][ T717] ? __pfx_netlink_sendmsg+0x10/0x10 [ 188.717571][ T717] ____sys_sendmsg+0x7ac/0xa10 [ 188.717734][ T717] ? __pfx_____sys_sendmsg+0x10/0x10 [ 188.717895][ T717] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 188.718158][ T717] ___sys_sendmsg+0xee/0x170 [ 188.718340][ T717] ? __pfx____sys_sendmsg+0x10/0x10 [ 188.718541][ T717] ? kasan_save_stack+0x34/0x50 [ 188.718707][ T717] ? kasan_save_stack+0x24/0x50 [ 188.718915][ T717] ? __kasan_record_aux_stack+0x8e/0xa0 [ 188.719068][ T717] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 188.719264][ T717] ? __x64_sys_close+0x7c/0xd0 [ 188.719412][ T717] ? do_syscall_64+0xc1/0x1d0 [ 188.719569][ T717] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 188.719824][ T717] ? __lock_acquire+0xb9a/0x1680 [ 188.720019][ T717] ? find_held_lock+0x2c/0x110 [ 188.720180][ T717] ? __lock_release+0x103/0x460 [ 188.720399][ T717] ? __virt_addr_valid+0x22b/0x430 [ 188.720595][ T717] ? __pfx___lock_release+0x10/0x10 [ 188.720787][ T717] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 188.720992][ T717] __sys_sendmsg+0x109/0x1a0 [ 188.721193][ T717] ? __pfx___sys_sendmsg+0x10/0x10 [ 188.721369][ T717] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 188.721558][ T717] do_syscall_64+0xc1/0x1d0 [ 188.721788][ T717] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 188.721973][ T717] RIP: 0033:0x7fd0785ff9a7 [ 188.722128][ T717] 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 [ 188.722686][ T717] RSP: 002b:00007ffccb4e93e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 188.722980][ T717] RAX: ffffffffffffffda RBX: 00007ffccb4e9b10 RCX: 00007fd0785ff9a7 [ 188.723242][ T717] RDX: 0000000000000000 RSI: 00007ffccb4e9450 RDI: 0000000000000005 [ 188.723569][ T717] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 188.723916][ T717] R10: 00007fd0784bdef8 R11: 0000000000000246 R12: 0000000000000002 [ 188.724266][ T717] R13: 0000000067795563 R14: 0000000000498600 R15: 0000000000000000 [ 188.724542][ T717]