[ 11.039098][ T262] ip (262) used greatest stack depth: 23920 bytes left [ 11.417428][ T271] ip (271) used greatest stack depth: 23880 bytes left [ 17.405487][ T353] 8021q: 802.1Q VLAN Support v1.8 [ 17.828143][ T359] gre: GRE over IPv4 demultiplexor driver [ 17.867479][ T359] ip6_gre: GRE over IPv6 tunneling driver [ 18.168266][ T364] ip (364) used greatest stack depth: 23216 bytes left [ 27.789699][ T442] GACT probability NOT on [ 43.831924][ T656] [ 43.832132][ T656] ============================================ [ 43.832327][ T656] WARNING: possible recursive locking detected [ 43.832513][ T656] 6.13.0-rc5-virtme #1 Not tainted [ 43.832662][ T656] -------------------------------------------- [ 43.832843][ T656] ip/656 is trying to acquire lock: [ 43.832990][ T656] ffffffffaf7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.833291][ T656] [ 43.833291][ T656] but task is already holding lock: [ 43.833506][ T656] ffffffffaf7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.833811][ T656] [ 43.833811][ T656] other info that might help us debug this: [ 43.834039][ T656] Possible unsafe locking scenario: [ 43.834039][ T656] [ 43.834250][ T656] CPU0 [ 43.834357][ T656] ---- [ 43.834465][ T656] lock((netdev_chain).rwsem); [ 43.834616][ T656] lock((netdev_chain).rwsem); [ 43.834762][ T656] [ 43.834762][ T656] *** DEADLOCK *** [ 43.834762][ T656] [ 43.834979][ T656] May be due to missing lock nesting notation [ 43.834979][ T656] [ 43.835191][ T656] 2 locks held by ip/656: [ 43.835302][ T656] #0: ffffffffaf7e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 43.835571][ T656] #1: ffffffffaf7d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 43.835868][ T656] [ 43.835868][ T656] stack backtrace: [ 43.836055][ T656] CPU: 0 UID: 0 PID: 656 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 43.836275][ T656] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 43.836454][ T656] Call Trace: [ 43.836568][ T656] [ 43.836644][ T656] dump_stack_lvl+0x82/0xd0 [ 43.836800][ T656] print_deadlock_bug+0x40a/0x650 [ 43.836950][ T656] validate_chain+0x5bf/0xae0 [ 43.837098][ T656] ? __pfx_validate_chain+0x10/0x10 [ 43.837248][ T656] ? hlock_class+0x4e/0x130 [ 43.837394][ T656] ? mark_lock+0x38/0x3e0 [ 43.837507][ T656] __lock_acquire+0xb9a/0x1680 [ 43.837655][ T656] lock_acquire.part.0+0xeb/0x330 [ 43.837801][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 43.837985][ T656] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 43.838172][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.838318][ T656] ? trace_lock_acquire+0x14c/0x1f0 [ 43.838463][ T656] ? lock_acquire+0x32/0xc0 [ 43.838610][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 43.838804][ T656] down_read+0x9f/0x340 [ 43.838917][ T656] ? blocking_notifier_call_chain+0x50/0x90 [ 43.839104][ T656] ? __pfx_down_read+0x10/0x10 [ 43.839254][ T656] ? __lock_release+0x103/0x460 [ 43.839402][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 43.839547][ T656] ? __pfx___lock_release+0x10/0x10 [ 43.839693][ T656] blocking_notifier_call_chain+0x50/0x90 [ 43.839841][ T656] __netdev_upper_dev_unlink+0xd9/0x220 [ 43.839989][ T656] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 43.840176][ T656] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 43.840321][ T656] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 43.840507][ T656] ? rtnl_is_locked+0x15/0x20 [ 43.840654][ T656] netdev_upper_dev_unlink+0x71/0xa0 [ 43.840799][ T656] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 43.840980][ T656] ? netconsole_netdev_event+0x2c1/0x620 [ 43.841132][ T656] ? mutex_is_locked+0x1c/0x60 [ 43.841277][ T656] ? rtnl_is_locked+0x15/0x20 [ 43.841424][ T656] ? netdev_master_upper_dev_get+0x13/0x120 [ 43.841609][ T656] vrf_device_event+0x78/0xe0 [vrf] [ 43.841759][ T656] notifier_call_chain+0xcd/0x150 [ 43.841905][ T656] blocking_notifier_call_chain+0x66/0x90 [ 43.842052][ T656] unregister_netdevice_many_notify+0xa7b/0x1580 [ 43.842243][ T656] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 43.842423][ T656] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 43.842571][ T656] ? __pfx___lock_release+0x10/0x10 [ 43.842717][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.842864][ T656] ? rtnl_is_locked+0x15/0x20 [ 43.843008][ T656] ? unregister_netdevice_queue+0x70/0x410 [ 43.843194][ T656] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 43.843377][ T656] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 43.843527][ T656] rtnl_dellink+0x348/0xa40 [ 43.843673][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.843833][ T656] ? find_held_lock+0x2c/0x110 [ 43.843980][ T656] ? __lock_release+0x103/0x460 [ 43.844127][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.844273][ T656] ? __pfx___lock_release+0x10/0x10 [ 43.844424][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.844586][ T656] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 43.844745][ T656] ? __pfx_rtnl_dellink+0x10/0x10 [ 43.844892][ T656] rtnetlink_rcv_msg+0x712/0xc10 [ 43.845038][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.845186][ T656] ? hlock_class+0x4e/0x130 [ 43.845332][ T656] ? mark_lock+0x38/0x3e0 [ 43.845450][ T656] ? __lock_acquire+0xb9a/0x1680 [ 43.845597][ T656] netlink_rcv_skb+0x130/0x360 [ 43.845744][ T656] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 43.845891][ T656] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 43.846040][ T656] ? netlink_deliver_tap+0x13e/0x340 [ 43.846188][ T656] ? netlink_deliver_tap+0xc3/0x340 [ 43.846335][ T656] netlink_unicast+0x44b/0x710 [ 43.846487][ T656] ? __pfx_netlink_unicast+0x10/0x10 [ 43.846631][ T656] ? find_held_lock+0x2c/0x110 [ 43.846780][ T656] netlink_sendmsg+0x723/0xbe0 [ 43.846928][ T656] ? __pfx_netlink_sendmsg+0x10/0x10 [ 43.847077][ T656] ____sys_sendmsg+0x7ac/0xa10 [ 43.847223][ T656] ? __pfx_____sys_sendmsg+0x10/0x10 [ 43.847370][ T656] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 43.847562][ T656] ___sys_sendmsg+0xee/0x170 [ 43.847708][ T656] ? __pfx____sys_sendmsg+0x10/0x10 [ 43.847856][ T656] ? kasan_save_stack+0x34/0x50 [ 43.848010][ T656] ? kasan_save_stack+0x24/0x50 [ 43.848157][ T656] ? __kasan_record_aux_stack+0x8e/0xa0 [ 43.848306][ T656] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 43.848490][ T656] ? __x64_sys_close+0x7c/0xd0 [ 43.848640][ T656] ? do_syscall_64+0xc1/0x1d0 [ 43.848801][ T656] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.848985][ T656] ? __lock_acquire+0xb9a/0x1680 [ 43.849134][ T656] ? find_held_lock+0x2c/0x110 [ 43.849283][ T656] ? __lock_release+0x103/0x460 [ 43.849430][ T656] ? __virt_addr_valid+0x22b/0x430 [ 43.849578][ T656] ? __pfx___lock_release+0x10/0x10 [ 43.849727][ T656] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 43.849876][ T656] __sys_sendmsg+0x109/0x1a0 [ 43.850024][ T656] ? __pfx___sys_sendmsg+0x10/0x10 [ 43.850169][ T656] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 43.850355][ T656] do_syscall_64+0xc1/0x1d0 [ 43.850501][ T656] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 43.850683][ T656] RIP: 0033:0x7f15160ec9a7 [ 43.850839][ 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 [ 43.851350][ T656] RSP: 002b:00007ffedd3e2dd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 43.851571][ T656] RAX: ffffffffffffffda RBX: 00007ffedd3e3500 RCX: 00007f15160ec9a7 [ 43.851798][ T656] RDX: 0000000000000000 RSI: 00007ffedd3e2e40 RDI: 0000000000000005 [ 43.852017][ T656] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 43.852240][ T656] R10: 00007f1515faaef8 R11: 0000000000000246 R12: 0000000000000002 [ 43.852459][ T656] R13: 0000000067792ecf R14: 0000000000498600 R15: 0000000000000000 [ 43.852687][ T656]