[ 48.682489][ T586] 8021q: 802.1Q VLAN Support v1.8 [ 49.041206][ T592] gre: GRE over IPv4 demultiplexor driver [ 49.054838][ T592] ip_gre: GRE over IPv4 tunneling driver [ 49.234507][ T596] ip (596) used greatest stack depth: 23352 bytes left [ 66.337815][ T690] [ 66.337942][ T690] ============================================ [ 66.338124][ T690] WARNING: possible recursive locking detected [ 66.338301][ T690] 6.13.0-rc5-virtme #1 Not tainted [ 66.338447][ T690] -------------------------------------------- [ 66.338625][ T690] ip/690 is trying to acquire lock: [ 66.338771][ T690] ffffffff95dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 66.339072][ T690] [ 66.339072][ T690] but task is already holding lock: [ 66.339281][ T690] ffffffff95dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 66.339575][ T690] [ 66.339575][ T690] other info that might help us debug this: [ 66.339786][ T690] Possible unsafe locking scenario: [ 66.339786][ T690] [ 66.339998][ T690] CPU0 [ 66.340107][ T690] ---- [ 66.340217][ T690] lock((netdev_chain).rwsem); [ 66.340449][ T690] lock((netdev_chain).rwsem); [ 66.340602][ T690] [ 66.340602][ T690] *** DEADLOCK *** [ 66.340602][ T690] [ 66.340821][ T690] May be due to missing lock nesting notation [ 66.340821][ T690] [ 66.341034][ T690] 2 locks held by ip/690: [ 66.341149][ T690] #0: ffffffff95de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 66.341414][ T690] #1: ffffffff95dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 66.341714][ T690] [ 66.341714][ T690] stack backtrace: [ 66.341906][ T690] CPU: 3 UID: 0 PID: 690 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 66.342126][ T690] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 66.342307][ T690] Call Trace: [ 66.342416][ T690] [ 66.342492][ T690] dump_stack_lvl+0x82/0xd0 [ 66.342649][ T690] print_deadlock_bug+0x40a/0x650 [ 66.342797][ T690] validate_chain+0x5bf/0xae0 [ 66.342943][ T690] ? __pfx_validate_chain+0x10/0x10 [ 66.343093][ T690] ? hlock_class+0x4e/0x130 [ 66.343240][ T690] ? mark_lock+0x38/0x3e0 [ 66.343352][ T690] __lock_acquire+0xb9a/0x1680 [ 66.343501][ T690] lock_acquire.part.0+0xeb/0x330 [ 66.343646][ T690] ? blocking_notifier_call_chain+0x50/0x90 [ 66.343833][ T690] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 66.344016][ T690] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 66.344162][ T690] ? trace_lock_acquire+0x14c/0x1f0 [ 66.344308][ T690] ? lock_acquire+0x32/0xc0 [ 66.344456][ T690] ? blocking_notifier_call_chain+0x50/0x90 [ 66.344637][ T690] down_read+0x9f/0x340 [ 66.344748][ T690] ? blocking_notifier_call_chain+0x50/0x90 [ 66.344932][ T690] ? __pfx_down_read+0x10/0x10 [ 66.345077][ T690] ? __lock_release+0x103/0x460 [ 66.345222][ T690] ? netconsole_netdev_event+0x2c1/0x620 [ 66.345368][ T690] ? __pfx___lock_release+0x10/0x10 [ 66.345516][ T690] blocking_notifier_call_chain+0x50/0x90 [ 66.345660][ T690] __netdev_upper_dev_unlink+0xd9/0x220 [ 66.345805][ T690] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 66.345991][ T690] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 66.346139][ T690] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 66.346319][ T690] ? rtnl_is_locked+0x15/0x20 [ 66.346465][ T690] netdev_upper_dev_unlink+0x71/0xa0 [ 66.346611][ T690] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 66.346793][ T690] ? netconsole_netdev_event+0x2c1/0x620 [ 66.346942][ T690] ? mutex_is_locked+0x1c/0x60 [ 66.347088][ T690] ? rtnl_is_locked+0x15/0x20 [ 66.347234][ T690] ? netdev_master_upper_dev_get+0x13/0x120 [ 66.347413][ T690] vrf_device_event+0x78/0xe0 [vrf] [ 66.347563][ T690] notifier_call_chain+0xcd/0x150 [ 66.347708][ T690] blocking_notifier_call_chain+0x66/0x90 [ 66.347856][ T690] unregister_netdevice_many_notify+0xa7b/0x1580 [ 66.348042][ T690] ? __lock_release+0x103/0x460 [ 66.348188][ T690] ? __pfx___lock_release+0x10/0x10 [ 66.348336][ T690] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 66.348519][ T690] ? hlock_class+0x4e/0x130 [ 66.348667][ T690] ? mark_held_locks+0x9e/0xe0 [ 66.348815][ T690] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 66.348963][ T690] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 66.349153][ T690] rtnl_dellink+0x348/0xa40 [ 66.349300][ T690] ? __pfx_rtnl_dellink+0x10/0x10 [ 66.349458][ T690] ? find_held_lock+0x2c/0x110 [ 66.349606][ T690] ? __lock_release+0x103/0x460 [ 66.349750][ T690] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 66.349896][ T690] ? __pfx___lock_release+0x10/0x10 [ 66.350042][ T690] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 66.350197][ T690] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 66.350343][ T690] ? __pfx_rtnl_dellink+0x10/0x10 [ 66.350490][ T690] rtnetlink_rcv_msg+0x712/0xc10 [ 66.350635][ T690] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 66.350779][ T690] ? hlock_class+0x4e/0x130 [ 66.350931][ T690] ? mark_lock+0x38/0x3e0 [ 66.351042][ T690] ? __lock_acquire+0xb9a/0x1680 [ 66.351186][ T690] netlink_rcv_skb+0x130/0x360 [ 66.351336][ T690] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 66.351483][ T690] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 66.351632][ T690] ? netlink_deliver_tap+0x13e/0x340 [ 66.351789][ T690] ? netlink_deliver_tap+0xc3/0x340 [ 66.351937][ T690] netlink_unicast+0x44b/0x710 [ 66.352084][ T690] ? __pfx_netlink_unicast+0x10/0x10 [ 66.352233][ T690] ? find_held_lock+0x2c/0x110 [ 66.352381][ T690] netlink_sendmsg+0x723/0xbe0 [ 66.352527][ T690] ? __pfx_netlink_sendmsg+0x10/0x10 [ 66.352675][ T690] ____sys_sendmsg+0x7ac/0xa10 [ 66.352822][ T690] ? __pfx_____sys_sendmsg+0x10/0x10 [ 66.352966][ T690] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 66.353153][ T690] ___sys_sendmsg+0xee/0x170 [ 66.353299][ T690] ? __pfx____sys_sendmsg+0x10/0x10 [ 66.353453][ T690] ? kasan_save_stack+0x34/0x50 [ 66.353601][ T690] ? kasan_save_stack+0x24/0x50 [ 66.353747][ T690] ? __kasan_record_aux_stack+0x8e/0xa0 [ 66.353893][ T690] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 66.354076][ T690] ? __x64_sys_close+0x7c/0xd0 [ 66.354221][ T690] ? do_syscall_64+0xc1/0x1d0 [ 66.354376][ T690] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 66.354564][ T690] ? __lock_acquire+0xb9a/0x1680 [ 66.354710][ T690] ? find_held_lock+0x2c/0x110 [ 66.354857][ T690] ? __lock_release+0x103/0x460 [ 66.355002][ T690] ? __virt_addr_valid+0x22b/0x430 [ 66.355147][ T690] ? __pfx___lock_release+0x10/0x10 [ 66.355291][ T690] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 66.355439][ T690] __sys_sendmsg+0x109/0x1a0 [ 66.355589][ T690] ? __pfx___sys_sendmsg+0x10/0x10 [ 66.355734][ T690] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 66.355921][ T690] do_syscall_64+0xc1/0x1d0 [ 66.356065][ T690] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 66.356245][ T690] RIP: 0033:0x7f859b7e49a7 [ 66.356396][ T690] 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 [ 66.356924][ T690] RSP: 002b:00007fff3c1ab2f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 66.357143][ T690] RAX: ffffffffffffffda RBX: 00007fff3c1aba20 RCX: 00007f859b7e49a7 [ 66.357369][ T690] RDX: 0000000000000000 RSI: 00007fff3c1ab360 RDI: 0000000000000005 [ 66.357593][ T690] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 66.357810][ T690] R10: 00007f859b6a2ef8 R11: 0000000000000246 R12: 0000000000000002 [ 66.358033][ T690] R13: 0000000067792bc7 R14: 0000000000498600 R15: 0000000000000000 [ 66.358254][ T690]