[ 11.266356][ T249] ip (249) used greatest stack depth: 23976 bytes left [ 15.803694][ T324] gre: GRE over IPv4 demultiplexor driver [ 15.851739][ T324] ip6_gre: GRE over IPv6 tunneling driver [ 17.329121][ T346] 8021q: 802.1Q VLAN Support v1.8 [ 20.264643][ T384] GACT probability NOT on [ 171.081850][ T595] [ 171.081987][ T595] ============================================ [ 171.082173][ T595] WARNING: possible recursive locking detected [ 171.082452][ T595] 6.13.0-rc5-virtme #1 Not tainted [ 171.082605][ T595] -------------------------------------------- [ 171.082786][ T595] ip/595 is trying to acquire lock: [ 171.082929][ T595] ffffffff899d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 171.083248][ T595] [ 171.083248][ T595] but task is already holding lock: [ 171.083462][ T595] ffffffff899d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 171.083755][ T595] [ 171.083755][ T595] other info that might help us debug this: [ 171.083974][ T595] Possible unsafe locking scenario: [ 171.083974][ T595] [ 171.084194][ T595] CPU0 [ 171.084306][ T595] ---- [ 171.084418][ T595] lock((netdev_chain).rwsem); [ 171.084562][ T595] lock((netdev_chain).rwsem); [ 171.084707][ T595] [ 171.084707][ T595] *** DEADLOCK *** [ 171.084707][ T595] [ 171.084930][ T595] May be due to missing lock nesting notation [ 171.084930][ T595] [ 171.085145][ T595] 2 locks held by ip/595: [ 171.085270][ T595] #0: ffffffff899e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 171.085548][ T595] #1: ffffffff899d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 171.085861][ T595] [ 171.085861][ T595] stack backtrace: [ 171.086047][ T595] CPU: 0 UID: 0 PID: 595 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 171.086267][ T595] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 171.086448][ T595] Call Trace: [ 171.086560][ T595] [ 171.086636][ T595] dump_stack_lvl+0x82/0xd0 [ 171.086797][ T595] print_deadlock_bug+0x40a/0x650 [ 171.086955][ T595] validate_chain+0x5bf/0xae0 [ 171.087104][ T595] ? __pfx_validate_chain+0x10/0x10 [ 171.087262][ T595] ? hlock_class+0x4e/0x130 [ 171.087411][ T595] ? mark_lock+0x38/0x3e0 [ 171.087523][ T595] __lock_acquire+0xb9a/0x1680 [ 171.087673][ T595] lock_acquire.part.0+0xeb/0x330 [ 171.087820][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 171.088009][ T595] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 171.088198][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 171.088343][ T595] ? trace_lock_acquire+0x14c/0x1f0 [ 171.088487][ T595] ? lock_acquire+0x32/0xc0 [ 171.088634][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 171.088824][ T595] down_read+0x9f/0x340 [ 171.088934][ T595] ? blocking_notifier_call_chain+0x50/0x90 [ 171.089120][ T595] ? __pfx_down_read+0x10/0x10 [ 171.089278][ T595] ? __lock_release+0x103/0x460 [ 171.089447][ T595] ? netconsole_netdev_event+0x2c1/0x620 [ 171.089626][ T595] ? __pfx___lock_release+0x10/0x10 [ 171.089776][ T595] blocking_notifier_call_chain+0x50/0x90 [ 171.089924][ T595] __netdev_upper_dev_unlink+0xd9/0x220 [ 171.090072][ T595] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 171.090260][ T595] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 171.090408][ T595] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 171.090590][ T595] ? rtnl_is_locked+0x15/0x20 [ 171.090744][ T595] netdev_upper_dev_unlink+0x71/0xa0 [ 171.090890][ T595] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 171.091082][ T595] ? netconsole_netdev_event+0x2c1/0x620 [ 171.091237][ T595] ? mutex_is_locked+0x1c/0x60 [ 171.091391][ T595] ? rtnl_is_locked+0x15/0x20 [ 171.091549][ T595] ? netdev_master_upper_dev_get+0x13/0x120 [ 171.091739][ T595] vrf_device_event+0x78/0xe0 [vrf] [ 171.091890][ T595] notifier_call_chain+0xcd/0x150 [ 171.092039][ T595] blocking_notifier_call_chain+0x66/0x90 [ 171.092185][ T595] unregister_netdevice_many_notify+0xa7b/0x1580 [ 171.092369][ T595] ? hlock_class+0x4e/0x130 [ 171.092527][ T595] ? mark_lock+0x38/0x3e0 [ 171.092645][ T595] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 171.092831][ T595] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 171.093020][ T595] ? kfree+0xf3/0x330 [ 171.093137][ T595] ? vlan_vid_del+0x310/0x5e0 [ 171.093288][ T595] ? vlan_vid_del+0x310/0x5e0 [ 171.093435][ T595] rtnl_dellink+0x348/0xa40 [ 171.093594][ T595] ? __pfx_rtnl_dellink+0x10/0x10 [ 171.093764][ T595] ? find_held_lock+0x2c/0x110 [ 171.093918][ T595] ? __lock_release+0x103/0x460 [ 171.094071][ T595] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 171.094223][ T595] ? __pfx___lock_release+0x10/0x10 [ 171.094369][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 171.094515][ T595] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 171.094665][ T595] ? __pfx_rtnl_dellink+0x10/0x10 [ 171.094821][ T595] rtnetlink_rcv_msg+0x712/0xc10 [ 171.094965][ T595] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 171.095113][ T595] ? hlock_class+0x4e/0x130 [ 171.095264][ T595] ? mark_lock+0x38/0x3e0 [ 171.095379][ T595] ? __lock_acquire+0xb9a/0x1680 [ 171.095524][ T595] netlink_rcv_skb+0x130/0x360 [ 171.095670][ T595] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 171.095819][ T595] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 171.095968][ T595] ? netlink_deliver_tap+0x13e/0x340 [ 171.096114][ T595] ? netlink_deliver_tap+0xc3/0x340 [ 171.096261][ T595] netlink_unicast+0x44b/0x710 [ 171.096405][ T595] ? __pfx_netlink_unicast+0x10/0x10 [ 171.096552][ T595] ? find_held_lock+0x2c/0x110 [ 171.096698][ T595] netlink_sendmsg+0x723/0xbe0 [ 171.096845][ T595] ? __pfx_netlink_sendmsg+0x10/0x10 [ 171.096992][ T595] ____sys_sendmsg+0x7ac/0xa10 [ 171.097138][ T595] ? __pfx_____sys_sendmsg+0x10/0x10 [ 171.097283][ T595] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 171.097465][ T595] ___sys_sendmsg+0xee/0x170 [ 171.097611][ T595] ? __pfx____sys_sendmsg+0x10/0x10 [ 171.097758][ T595] ? kasan_save_stack+0x34/0x50 [ 171.097905][ T595] ? kasan_save_stack+0x24/0x50 [ 171.098050][ T595] ? __kasan_record_aux_stack+0x8e/0xa0 [ 171.098195][ T595] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 171.098380][ T595] ? __x64_sys_close+0x7c/0xd0 [ 171.098527][ T595] ? do_syscall_64+0xc1/0x1d0 [ 171.098671][ T595] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 171.098853][ T595] ? __lock_acquire+0xb9a/0x1680 [ 171.099005][ T595] ? find_held_lock+0x2c/0x110 [ 171.099152][ T595] ? __lock_release+0x103/0x460 [ 171.099299][ T595] ? __virt_addr_valid+0x22b/0x430 [ 171.099462][ T595] ? __pfx___lock_release+0x10/0x10 [ 171.099615][ T595] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 171.099761][ T595] __sys_sendmsg+0x109/0x1a0 [ 171.099906][ T595] ? __pfx___sys_sendmsg+0x10/0x10 [ 171.100060][ T595] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 171.100244][ T595] do_syscall_64+0xc1/0x1d0 [ 171.100390][ T595] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 171.100571][ T595] RIP: 0033:0x7f0c11a5b9a7 [ 171.100738][ T595] 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 [ 171.101261][ T595] RSP: 002b:00007ffefb1a1968 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 171.101481][ T595] RAX: ffffffffffffffda RBX: 00007ffefb1a2090 RCX: 00007f0c11a5b9a7 [ 171.101706][ T595] RDX: 0000000000000000 RSI: 00007ffefb1a19d0 RDI: 0000000000000005 [ 171.101932][ T595] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 171.102159][ T595] R10: 00007f0c11919ef8 R11: 0000000000000246 R12: 0000000000000002 [ 171.102380][ T595] R13: 0000000067795568 R14: 0000000000498600 R15: 0000000000000000 [ 171.102611][ T595]