[ 80.370436][ T1055] 8021q: 802.1Q VLAN Support v1.8 [ 80.830511][ T1061] gre: GRE over IPv4 demultiplexor driver [ 80.846340][ T1061] ip_gre: GRE over IPv4 tunneling driver [ 94.420393][ T1166] [ 94.420616][ T1166] ============================================ [ 94.420817][ T1166] WARNING: possible recursive locking detected [ 94.421000][ T1166] 6.13.0-rc5-virtme #1 Not tainted [ 94.421146][ T1166] -------------------------------------------- [ 94.421331][ T1166] ip/1166 is trying to acquire lock: [ 94.421475][ T1166] ffffffff8e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 94.421801][ T1166] [ 94.421801][ T1166] but task is already holding lock: [ 94.422026][ T1166] ffffffff8e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 94.422320][ T1166] [ 94.422320][ T1166] other info that might help us debug this: [ 94.422547][ T1166] Possible unsafe locking scenario: [ 94.422547][ T1166] [ 94.422760][ T1166] CPU0 [ 94.422871][ T1166] ---- [ 94.422986][ T1166] lock((netdev_chain).rwsem); [ 94.423136][ T1166] lock((netdev_chain).rwsem); [ 94.423287][ T1166] [ 94.423287][ T1166] *** DEADLOCK *** [ 94.423287][ T1166] [ 94.423509][ T1166] May be due to missing lock nesting notation [ 94.423509][ T1166] [ 94.423741][ T1166] 2 locks held by ip/1166: [ 94.423892][ T1166] #0: ffffffff8e3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 94.424165][ T1166] #1: ffffffff8e3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 94.424493][ T1166] [ 94.424493][ T1166] stack backtrace: [ 94.424677][ T1166] CPU: 3 UID: 0 PID: 1166 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 94.424901][ T1166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 94.425099][ T1166] Call Trace: [ 94.425226][ T1166] [ 94.425305][ T1166] dump_stack_lvl+0x82/0xd0 [ 94.425459][ T1166] print_deadlock_bug+0x40a/0x650 [ 94.425612][ T1166] validate_chain+0x5bf/0xae0 [ 94.425764][ T1166] ? __pfx_validate_chain+0x10/0x10 [ 94.425912][ T1166] ? hlock_class+0x4e/0x130 [ 94.426061][ T1166] ? mark_lock+0x38/0x3e0 [ 94.426177][ T1166] __lock_acquire+0xb9a/0x1680 [ 94.426330][ T1166] lock_acquire.part.0+0xeb/0x330 [ 94.426484][ T1166] ? blocking_notifier_call_chain+0x50/0x90 [ 94.426667][ T1166] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 94.426855][ T1166] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 94.427003][ T1166] ? trace_lock_acquire+0x14c/0x1f0 [ 94.427150][ T1166] ? lock_acquire+0x32/0xc0 [ 94.427296][ T1166] ? blocking_notifier_call_chain+0x50/0x90 [ 94.427486][ T1166] down_read+0x9f/0x340 [ 94.427599][ T1166] ? blocking_notifier_call_chain+0x50/0x90 [ 94.427782][ T1166] ? __pfx_down_read+0x10/0x10 [ 94.427929][ T1166] ? __lock_release+0x103/0x460 [ 94.428074][ T1166] ? netconsole_netdev_event+0x2c1/0x620 [ 94.428236][ T1166] ? __pfx___lock_release+0x10/0x10 [ 94.428387][ T1166] blocking_notifier_call_chain+0x50/0x90 [ 94.428541][ T1166] __netdev_upper_dev_unlink+0xd9/0x220 [ 94.428690][ T1166] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 94.428872][ T1166] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 94.429019][ T1166] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 94.429202][ T1166] ? rtnl_is_locked+0x15/0x20 [ 94.429353][ T1166] netdev_upper_dev_unlink+0x71/0xa0 [ 94.429498][ T1166] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 94.429687][ T1166] ? netconsole_netdev_event+0x2c1/0x620 [ 94.429839][ T1166] ? mutex_is_locked+0x1c/0x60 [ 94.429987][ T1166] ? rtnl_is_locked+0x15/0x20 [ 94.430134][ T1166] ? netdev_master_upper_dev_get+0x13/0x120 [ 94.430317][ T1166] vrf_device_event+0x78/0xe0 [vrf] [ 94.430470][ T1166] notifier_call_chain+0xcd/0x150 [ 94.430618][ T1166] blocking_notifier_call_chain+0x66/0x90 [ 94.430773][ T1166] unregister_netdevice_many_notify+0xa7b/0x1580 [ 94.430958][ T1166] ? find_held_lock+0x2c/0x110 [ 94.431108][ T1166] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 94.431291][ T1166] ? __pfx___lock_release+0x10/0x10 [ 94.431439][ T1166] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 94.431590][ T1166] ? rtnl_is_locked+0x15/0x20 [ 94.431740][ T1166] ? unregister_netdevice_queue+0x70/0x410 [ 94.431925][ T1166] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 94.432111][ T1166] ? net_generic+0xbb/0x1f0 [ 94.432263][ T1166] rtnl_dellink+0x348/0xa40 [ 94.432412][ T1166] ? __pfx_rtnl_dellink+0x10/0x10 [ 94.432572][ T1166] ? find_held_lock+0x2c/0x110 [ 94.432723][ T1166] ? __lock_release+0x103/0x460 [ 94.432914][ T1166] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 94.433080][ T1166] ? __pfx___lock_release+0x10/0x10 [ 94.433255][ T1166] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 94.433420][ T1166] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 94.433581][ T1166] ? __pfx_rtnl_dellink+0x10/0x10 [ 94.433745][ T1166] rtnetlink_rcv_msg+0x712/0xc10 [ 94.433911][ T1166] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 94.434081][ T1166] ? hlock_class+0x4e/0x130 [ 94.434243][ T1166] ? mark_lock+0x38/0x3e0 [ 94.434371][ T1166] ? __lock_acquire+0xb9a/0x1680 [ 94.434538][ T1166] netlink_rcv_skb+0x130/0x360 [ 94.434703][ T1166] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 94.434868][ T1166] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 94.435036][ T1166] ? netlink_deliver_tap+0x13e/0x340 [ 94.435205][ T1166] ? netlink_deliver_tap+0xc3/0x340 [ 94.435376][ T1166] netlink_unicast+0x44b/0x710 [ 94.435538][ T1166] ? __pfx_netlink_unicast+0x10/0x10 [ 94.435702][ T1166] ? find_held_lock+0x2c/0x110 [ 94.435867][ T1166] netlink_sendmsg+0x723/0xbe0 [ 94.436030][ T1166] ? __pfx_netlink_sendmsg+0x10/0x10 [ 94.436196][ T1166] ____sys_sendmsg+0x7ac/0xa10 [ 94.436363][ T1166] ? __pfx_____sys_sendmsg+0x10/0x10 [ 94.436532][ T1166] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 94.436745][ T1166] ___sys_sendmsg+0xee/0x170 [ 94.436911][ T1166] ? __pfx____sys_sendmsg+0x10/0x10 [ 94.437075][ T1166] ? kasan_save_stack+0x34/0x50 [ 94.437242][ T1166] ? kasan_save_stack+0x24/0x50 [ 94.437404][ T1166] ? __kasan_record_aux_stack+0x8e/0xa0 [ 94.437571][ T1166] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 94.437787][ T1166] ? __x64_sys_close+0x7c/0xd0 [ 94.437953][ T1166] ? do_syscall_64+0xc1/0x1d0 [ 94.438117][ T1166] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.438336][ T1166] ? __lock_acquire+0xb9a/0x1680 [ 94.438502][ T1166] ? find_held_lock+0x2c/0x110 [ 94.438668][ T1166] ? __lock_release+0x103/0x460 [ 94.438829][ T1166] ? __virt_addr_valid+0x22b/0x430 [ 94.438998][ T1166] ? __pfx___lock_release+0x10/0x10 [ 94.439163][ T1166] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 94.439333][ T1166] __sys_sendmsg+0x109/0x1a0 [ 94.439496][ T1166] ? __pfx___sys_sendmsg+0x10/0x10 [ 94.439660][ T1166] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 94.439872][ T1166] do_syscall_64+0xc1/0x1d0 [ 94.440037][ T1166] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 94.440245][ T1166] RIP: 0033:0x7fb272b3d9a7 [ 94.440418][ T1166] 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 [ 94.440998][ T1166] RSP: 002b:00007fff185cfd58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 94.441249][ T1166] RAX: ffffffffffffffda RBX: 00007fff185d0480 RCX: 00007fb272b3d9a7 [ 94.441515][ T1166] RDX: 0000000000000000 RSI: 00007fff185cfdc0 RDI: 0000000000000005 [ 94.441762][ T1166] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 94.442008][ T1166] R10: 00007fb2729fbef8 R11: 0000000000000246 R12: 0000000000000002 [ 94.442267][ T1166] R13: 0000000067792bd8 R14: 0000000000498600 R15: 0000000000000000 [ 94.442525][ T1166]