[ 17.780715][ T354] 8021q: 802.1Q VLAN Support v1.8 [ 18.225378][ T361] gre: GRE over IPv4 demultiplexor driver [ 18.280333][ T361] ip6_gre: GRE over IPv6 tunneling driver [ 18.433698][ T365] ip (365) used greatest stack depth: 23088 bytes left [ 28.324573][ T444] GACT probability NOT on [ 45.433005][ T659] [ 45.433182][ T659] ============================================ [ 45.433394][ T659] WARNING: possible recursive locking detected [ 45.433601][ T659] 6.13.0-rc5-virtme #1 Not tainted [ 45.433771][ T659] -------------------------------------------- [ 45.433968][ T659] ip/659 is trying to acquire lock: [ 45.434126][ T659] ffffffff89dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.434467][ T659] [ 45.434467][ T659] but task is already holding lock: [ 45.434710][ T659] ffffffff89dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.435036][ T659] [ 45.435036][ T659] other info that might help us debug this: [ 45.435272][ T659] Possible unsafe locking scenario: [ 45.435272][ T659] [ 45.435510][ T659] CPU0 [ 45.435628][ T659] ---- [ 45.435747][ T659] lock((netdev_chain).rwsem); [ 45.435914][ T659] lock((netdev_chain).rwsem); [ 45.436074][ T659] [ 45.436074][ T659] *** DEADLOCK *** [ 45.436074][ T659] [ 45.436305][ T659] May be due to missing lock nesting notation [ 45.436305][ T659] [ 45.436541][ T659] 2 locks held by ip/659: [ 45.436661][ T659] #0: ffffffff89de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 45.436957][ T659] #1: ffffffff89dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 45.437281][ T659] [ 45.437281][ T659] stack backtrace: [ 45.437482][ T659] CPU: 2 UID: 0 PID: 659 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 45.437724][ T659] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.437920][ T659] Call Trace: [ 45.438045][ T659] [ 45.438128][ T659] dump_stack_lvl+0x82/0xd0 [ 45.438293][ T659] print_deadlock_bug+0x40a/0x650 [ 45.438455][ T659] validate_chain+0x5bf/0xae0 [ 45.438618][ T659] ? __pfx_validate_chain+0x10/0x10 [ 45.438781][ T659] ? hlock_class+0x4e/0x130 [ 45.438941][ T659] ? mark_lock+0x38/0x3e0 [ 45.439064][ T659] __lock_acquire+0xb9a/0x1680 [ 45.439228][ T659] lock_acquire.part.0+0xeb/0x330 [ 45.439392][ T659] ? blocking_notifier_call_chain+0x50/0x90 [ 45.439590][ T659] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 45.439797][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.439959][ T659] ? trace_lock_acquire+0x14c/0x1f0 [ 45.440122][ T659] ? lock_acquire+0x32/0xc0 [ 45.440282][ T659] ? blocking_notifier_call_chain+0x50/0x90 [ 45.440486][ T659] down_read+0x9f/0x340 [ 45.440608][ T659] ? blocking_notifier_call_chain+0x50/0x90 [ 45.440809][ T659] ? __pfx_down_read+0x10/0x10 [ 45.440972][ T659] ? __lock_release+0x103/0x460 [ 45.441135][ T659] ? netconsole_netdev_event+0x2c1/0x620 [ 45.441298][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.441463][ T659] blocking_notifier_call_chain+0x50/0x90 [ 45.441629][ T659] __netdev_upper_dev_unlink+0xd9/0x220 [ 45.441792][ T659] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 45.441993][ T659] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 45.442153][ T659] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 45.442357][ T659] ? rtnl_is_locked+0x15/0x20 [ 45.442521][ T659] netdev_upper_dev_unlink+0x71/0xa0 [ 45.442683][ T659] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 45.442912][ T659] ? netconsole_netdev_event+0x2c1/0x620 [ 45.443090][ T659] ? mutex_is_locked+0x1c/0x60 [ 45.443255][ T659] ? rtnl_is_locked+0x15/0x20 [ 45.443414][ T659] ? netdev_master_upper_dev_get+0x13/0x120 [ 45.443619][ T659] vrf_device_event+0x78/0xe0 [vrf] [ 45.443786][ T659] notifier_call_chain+0xcd/0x150 [ 45.443950][ T659] blocking_notifier_call_chain+0x66/0x90 [ 45.444116][ T659] unregister_netdevice_many_notify+0xa7b/0x1580 [ 45.444318][ T659] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 45.444520][ T659] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 45.444687][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.444850][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.445013][ T659] ? rtnl_is_locked+0x15/0x20 [ 45.445179][ T659] ? unregister_netdevice_queue+0x70/0x410 [ 45.445383][ T659] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 45.445583][ T659] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 45.445746][ T659] rtnl_dellink+0x348/0xa40 [ 45.445911][ T659] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.446085][ T659] ? find_held_lock+0x2c/0x110 [ 45.446247][ T659] ? __lock_release+0x103/0x460 [ 45.446413][ T659] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.446574][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.446737][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.446897][ T659] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 45.447060][ T659] ? __pfx_rtnl_dellink+0x10/0x10 [ 45.447224][ T659] rtnetlink_rcv_msg+0x712/0xc10 [ 45.447385][ T659] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.447549][ T659] ? hlock_class+0x4e/0x130 [ 45.447712][ T659] ? mark_lock+0x38/0x3e0 [ 45.447835][ T659] ? __lock_acquire+0xb9a/0x1680 [ 45.447999][ T659] netlink_rcv_skb+0x130/0x360 [ 45.448160][ T659] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 45.448319][ T659] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 45.448484][ T659] ? netlink_deliver_tap+0x13e/0x340 [ 45.448651][ T659] ? netlink_deliver_tap+0xc3/0x340 [ 45.448811][ T659] netlink_unicast+0x44b/0x710 [ 45.448985][ T659] ? __pfx_netlink_unicast+0x10/0x10 [ 45.449147][ T659] ? find_held_lock+0x2c/0x110 [ 45.449310][ T659] netlink_sendmsg+0x723/0xbe0 [ 45.449477][ T659] ? __pfx_netlink_sendmsg+0x10/0x10 [ 45.449642][ T659] ____sys_sendmsg+0x7ac/0xa10 [ 45.449810][ T659] ? __pfx_____sys_sendmsg+0x10/0x10 [ 45.449973][ T659] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 45.450195][ T659] ___sys_sendmsg+0xee/0x170 [ 45.450359][ T659] ? __pfx____sys_sendmsg+0x10/0x10 [ 45.450523][ T659] ? kasan_save_stack+0x34/0x50 [ 45.450689][ T659] ? kasan_save_stack+0x24/0x50 [ 45.450847][ T659] ? __kasan_record_aux_stack+0x8e/0xa0 [ 45.451014][ T659] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 45.451223][ T659] ? __x64_sys_close+0x7c/0xd0 [ 45.451385][ T659] ? do_syscall_64+0xc1/0x1d0 [ 45.451544][ T659] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.451743][ T659] ? __lock_acquire+0xb9a/0x1680 [ 45.451909][ T659] ? find_held_lock+0x2c/0x110 [ 45.452072][ T659] ? __lock_release+0x103/0x460 [ 45.452233][ T659] ? __virt_addr_valid+0x22b/0x430 [ 45.452402][ T659] ? __pfx___lock_release+0x10/0x10 [ 45.452563][ T659] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.452725][ T659] __sys_sendmsg+0x109/0x1a0 [ 45.452921][ T659] ? __pfx___sys_sendmsg+0x10/0x10 [ 45.453081][ T659] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 45.453285][ T659] do_syscall_64+0xc1/0x1d0 [ 45.453452][ T659] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.453658][ T659] RIP: 0033:0x7ff7257159a7 [ 45.453830][ T659] 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 [ 45.454411][ T659] RSP: 002b:00007fff586b9798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 45.454657][ T659] RAX: ffffffffffffffda RBX: 00007fff586b9ec0 RCX: 00007ff7257159a7 [ 45.454900][ T659] RDX: 0000000000000000 RSI: 00007fff586b9800 RDI: 0000000000000005 [ 45.455141][ T659] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 45.455380][ T659] R10: 00007ff7255d3ef8 R11: 0000000000000246 R12: 0000000000000002 [ 45.455622][ T659] R13: 000000006779577f R14: 0000000000498600 R15: 0000000000000000 [ 45.455874][ T659]