[ 10.939375][ T249] ip (249) used greatest stack depth: 24544 bytes left [ 14.207810][ T309] ip (309) used greatest stack depth: 24256 bytes left [ 17.702120][ T355] 8021q: 802.1Q VLAN Support v1.8 [ 18.136809][ T361] gre: GRE over IPv4 demultiplexor driver [ 18.175329][ T361] ip6_gre: GRE over IPv6 tunneling driver [ 28.039040][ T443] GACT probability NOT on [ 44.956590][ T656] [ 44.956799][ T656] ============================================ [ 44.956997][ T656] WARNING: possible recursive locking detected [ 44.957183][ T656] 6.13.0-rc5-virtme #1 Not tainted [ 44.957330][ T656] -------------------------------------------- [ 44.957520][ T656] ip/656 is trying to acquire lock: [ 44.957667][ T656] ffffffffb3dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.957985][ T656] [ 44.957985][ T656] but task is already holding lock: [ 44.958209][ T656] ffffffffb3dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.958516][ T656] [ 44.958516][ T656] other info that might help us debug this: [ 44.958736][ T656] Possible unsafe locking scenario: [ 44.958736][ T656] [ 44.958947][ T656] CPU0 [ 44.959055][ T656] ---- [ 44.959168][ T656] lock((netdev_chain).rwsem); [ 44.959323][ T656] lock((netdev_chain).rwsem); [ 44.959468][ T656] [ 44.959468][ T656] *** DEADLOCK *** [ 44.959468][ T656] [ 44.959678][ T656] May be due to missing lock nesting notation [ 44.959678][ T656] [ 44.959891][ T656] 2 locks held by ip/656: [ 44.960005][ T656] #0: ffffffffb3de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 44.960279][ T656] #1: ffffffffb3dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.960575][ T656] [ 44.960575][ T656] stack backtrace: [ 44.960755][ T656] CPU: 2 UID: 0 PID: 656 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 44.960973][ T656] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.961155][ T656] Call Trace: [ 44.961271][ T656] [ 44.961349][ T656] dump_stack_lvl+0x82/0xd0 [ 44.961500][ T656] print_deadlock_bug+0x40a/0x650 [ 44.961651][ T656] validate_chain+0x5bf/0xae0 [ 44.961799][ T656] ? __pfx_validate_chain+0x10/0x10 [ 44.961948][ T656] ? hlock_class+0x4e/0x130 [ 44.962104][ T656] ? mark_lock+0x38/0x3e0 [ 44.962220][ T656] __lock_acquire+0xb9a/0x1680 [ 44.962377][ T656] lock_acquire.part.0+0xeb/0x330 [ 44.962523][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.962706][ T656] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 44.962894][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.963038][ T656] ? trace_lock_acquire+0x14c/0x1f0 [ 44.963184][ T656] ? lock_acquire+0x32/0xc0 [ 44.963327][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.963514][ T656] down_read+0x9f/0x340 [ 44.963625][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 44.963808][ T656] ? __pfx_down_read+0x10/0x10 [ 44.963953][ T656] ? __lock_release+0x103/0x460 [ 44.964117][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 44.964265][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.964415][ T656] blocking_notifier_call_chain+0x50/0x90 [ 44.964570][ T656] __netdev_upper_dev_unlink+0xd9/0x220 [ 44.964716][ T656] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 44.964897][ T656] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 44.965043][ T656] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 44.965228][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.965380][ T656] netdev_upper_dev_unlink+0x71/0xa0 [ 44.965526][ T656] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 44.965726][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 44.965874][ T656] ? mutex_is_locked+0x1c/0x60 [ 44.966020][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.966166][ T656] ? netdev_master_upper_dev_get+0x13/0x120 [ 44.966347][ T656] vrf_device_event+0x78/0xe0 [vrf] [ 44.966502][ T656] notifier_call_chain+0xcd/0x150 [ 44.966657][ T656] blocking_notifier_call_chain+0x66/0x90 [ 44.966808][ T656] unregister_netdevice_many_notify+0xa7b/0x1580 [ 44.966996][ T656] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 44.967179][ T656] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 44.967330][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.967476][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.967638][ T656] ? rtnl_is_locked+0x15/0x20 [ 44.967792][ T656] ? unregister_netdevice_queue+0x70/0x410 [ 44.967981][ T656] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 44.968176][ T656] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 44.968324][ T656] rtnl_dellink+0x348/0xa40 [ 44.968471][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.968633][ T656] ? find_held_lock+0x2c/0x110 [ 44.968794][ T656] ? __lock_release+0x103/0x460 [ 44.968947][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.969091][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.969237][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.969387][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.969533][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.969681][ T656] rtnetlink_rcv_msg+0x712/0xc10 [ 44.969828][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.969979][ T656] ? hlock_class+0x4e/0x130 [ 44.970123][ T656] ? mark_lock+0x38/0x3e0 [ 44.970235][ T656] ? __lock_acquire+0xb9a/0x1680 [ 44.970384][ T656] netlink_rcv_skb+0x130/0x360 [ 44.970536][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.970683][ T656] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 44.970832][ T656] ? netlink_deliver_tap+0x13e/0x340 [ 44.970987][ T656] ? netlink_deliver_tap+0xc3/0x340 [ 44.971144][ T656] netlink_unicast+0x44b/0x710 [ 44.971295][ T656] ? __pfx_netlink_unicast+0x10/0x10 [ 44.971440][ T656] ? find_held_lock+0x2c/0x110 [ 44.971587][ T656] netlink_sendmsg+0x723/0xbe0 [ 44.971733][ T656] ? __pfx_netlink_sendmsg+0x10/0x10 [ 44.971886][ T656] ____sys_sendmsg+0x7ac/0xa10 [ 44.972041][ T656] ? __pfx_____sys_sendmsg+0x10/0x10 [ 44.972197][ T656] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 44.972386][ T656] ___sys_sendmsg+0xee/0x170 [ 44.972536][ T656] ? __pfx____sys_sendmsg+0x10/0x10 [ 44.972683][ T656] ? kasan_save_stack+0x34/0x50 [ 44.972920][ T656] ? kasan_save_stack+0x24/0x50 [ 44.973069][ T656] ? __kasan_record_aux_stack+0x8e/0xa0 [ 44.973234][ T656] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 44.973420][ T656] ? __x64_sys_close+0x7c/0xd0 [ 44.973566][ T656] ? do_syscall_64+0xc1/0x1d0 [ 44.973713][ T656] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.973895][ T656] ? __lock_acquire+0xb9a/0x1680 [ 44.974056][ T656] ? find_held_lock+0x2c/0x110 [ 44.974212][ T656] ? __lock_release+0x103/0x460 [ 44.974356][ T656] ? __virt_addr_valid+0x22b/0x430 [ 44.974514][ T656] ? __pfx___lock_release+0x10/0x10 [ 44.974659][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.974812][ T656] __sys_sendmsg+0x109/0x1a0 [ 44.974963][ T656] ? __pfx___sys_sendmsg+0x10/0x10 [ 44.975108][ T656] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 44.975303][ T656] do_syscall_64+0xc1/0x1d0 [ 44.975455][ T656] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.975642][ T656] RIP: 0033:0x7f0b376a69a7 [ 44.975813][ T656] 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 [ 44.976338][ T656] RSP: 002b:00007ffeb6616888 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.976581][ T656] RAX: ffffffffffffffda RBX: 00007ffeb6616fb0 RCX: 00007f0b376a69a7 [ 44.976802][ T656] RDX: 0000000000000000 RSI: 00007ffeb66168f0 RDI: 0000000000000005 [ 44.977024][ T656] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.977254][ T656] R10: 00007f0b37564ef8 R11: 0000000000000246 R12: 0000000000000002 [ 44.977481][ T656] R13: 0000000067792eeb R14: 0000000000498600 R15: 0000000000000000 [ 44.977703][ T656] [ 45.004774][ T656] ip (656) used greatest stack depth: 23544 bytes left