[ 10.482203][ T247] ip (247) used greatest stack depth: 24256 bytes left [ 10.864067][ T260] ip (260) used greatest stack depth: 23120 bytes left [ 15.474866][ T331] 8021q: 802.1Q VLAN Support v1.8 [ 15.882844][ T337] gre: GRE over IPv4 demultiplexor driver [ 15.895855][ T337] ip_gre: GRE over IPv4 tunneling driver [ 29.333822][ T441] [ 29.334022][ T441] ============================================ [ 29.334336][ T441] WARNING: possible recursive locking detected [ 29.334614][ T441] 6.13.0-rc5-virtme #1 Not tainted [ 29.334854][ T441] -------------------------------------------- [ 29.335123][ T441] ip/441 is trying to acquire lock: [ 29.335340][ T441] ffffffff8fbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.335810][ T441] [ 29.335810][ T441] but task is already holding lock: [ 29.336125][ T441] ffffffff8fbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.336570][ T441] [ 29.336570][ T441] other info that might help us debug this: [ 29.336912][ T441] Possible unsafe locking scenario: [ 29.336912][ T441] [ 29.337240][ T441] CPU0 [ 29.337409][ T441] ---- [ 29.337577][ T441] lock((netdev_chain).rwsem); [ 29.337802][ T441] lock((netdev_chain).rwsem); [ 29.338027][ T441] [ 29.338027][ T441] *** DEADLOCK *** [ 29.338027][ T441] [ 29.338361][ T441] May be due to missing lock nesting notation [ 29.338361][ T441] [ 29.338685][ T441] 2 locks held by ip/441: [ 29.338852][ T441] #0: ffffffff8fbe7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.339290][ T441] #1: ffffffff8fbd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.339779][ T441] [ 29.339779][ T441] stack backtrace: [ 29.340056][ T441] CPU: 3 UID: 0 PID: 441 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.340420][ T441] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.340708][ T441] Call Trace: [ 29.340888][ T441] [ 29.341008][ T441] dump_stack_lvl+0x82/0xd0 [ 29.341252][ T441] print_deadlock_bug+0x40a/0x650 [ 29.341482][ T441] validate_chain+0x5bf/0xae0 [ 29.341709][ T441] ? __pfx_validate_chain+0x10/0x10 [ 29.341940][ T441] ? hlock_class+0x4e/0x130 [ 29.342181][ T441] ? mark_lock+0x38/0x3e0 [ 29.342361][ T441] __lock_acquire+0xb9a/0x1680 [ 29.342593][ T441] lock_acquire.part.0+0xeb/0x330 [ 29.342831][ T441] ? blocking_notifier_call_chain+0x50/0x90 [ 29.343119][ T441] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.343411][ T441] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.343644][ T441] ? trace_lock_acquire+0x14c/0x1f0 [ 29.343879][ T441] ? lock_acquire+0x32/0xc0 [ 29.344110][ T441] ? blocking_notifier_call_chain+0x50/0x90 [ 29.344391][ T441] down_read+0x9f/0x340 [ 29.344571][ T441] ? blocking_notifier_call_chain+0x50/0x90 [ 29.344857][ T441] ? __pfx_down_read+0x10/0x10 [ 29.345090][ T441] ? __lock_release+0x103/0x460 [ 29.345320][ T441] ? netconsole_netdev_event+0x2c1/0x620 [ 29.345565][ T441] ? __pfx___lock_release+0x10/0x10 [ 29.345799][ T441] blocking_notifier_call_chain+0x50/0x90 [ 29.346028][ T441] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.346266][ T441] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.346553][ T441] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.346793][ T441] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.347092][ T441] ? rtnl_is_locked+0x15/0x20 [ 29.347328][ T441] netdev_upper_dev_unlink+0x71/0xa0 [ 29.347560][ T441] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.347849][ T441] ? netconsole_netdev_event+0x2c1/0x620 [ 29.348091][ T441] ? mutex_is_locked+0x1c/0x60 [ 29.348336][ T441] ? rtnl_is_locked+0x15/0x20 [ 29.348573][ T441] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.348887][ T441] vrf_device_event+0x78/0xe0 [vrf] [ 29.349134][ T441] notifier_call_chain+0xcd/0x150 [ 29.349372][ T441] blocking_notifier_call_chain+0x66/0x90 [ 29.349608][ T441] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.349895][ T441] ? find_held_lock+0x2c/0x110 [ 29.350070][ T441] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.350258][ T441] ? __pfx___lock_release+0x10/0x10 [ 29.350428][ T441] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.350598][ T441] ? rtnl_is_locked+0x15/0x20 [ 29.350749][ T441] ? unregister_netdevice_queue+0x70/0x410 [ 29.350933][ T441] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.351119][ T441] ? net_generic+0xbb/0x1f0 [ 29.351269][ T441] rtnl_dellink+0x348/0xa40 [ 29.351420][ T441] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.351604][ T441] ? find_held_lock+0x2c/0x110 [ 29.351766][ T441] ? __lock_release+0x103/0x460 [ 29.351912][ T441] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.352070][ T441] ? __pfx___lock_release+0x10/0x10 [ 29.352230][ T441] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.352390][ T441] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.352535][ T441] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.352697][ T441] rtnetlink_rcv_msg+0x712/0xc10 [ 29.352844][ T441] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.352990][ T441] ? hlock_class+0x4e/0x130 [ 29.353148][ T441] ? mark_lock+0x38/0x3e0 [ 29.353261][ T441] ? __lock_acquire+0xb9a/0x1680 [ 29.353422][ T441] netlink_rcv_skb+0x130/0x360 [ 29.353579][ T441] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.353740][ T441] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.353906][ T441] ? netlink_deliver_tap+0x13e/0x340 [ 29.354068][ T441] ? netlink_deliver_tap+0xc3/0x340 [ 29.354220][ T441] netlink_unicast+0x44b/0x710 [ 29.354365][ T441] ? __pfx_netlink_unicast+0x10/0x10 [ 29.354511][ T441] ? find_held_lock+0x2c/0x110 [ 29.354670][ T441] netlink_sendmsg+0x723/0xbe0 [ 29.354829][ T441] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.354981][ T441] ____sys_sendmsg+0x7ac/0xa10 [ 29.355134][ T441] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.355327][ T441] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.355645][ T441] ___sys_sendmsg+0xee/0x170 [ 29.355889][ T441] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.356139][ T441] ? kasan_save_stack+0x34/0x50 [ 29.356389][ T441] ? kasan_save_stack+0x24/0x50 [ 29.356629][ T441] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.356865][ T441] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.357159][ T441] ? __x64_sys_close+0x7c/0xd0 [ 29.357394][ T441] ? do_syscall_64+0xc1/0x1d0 [ 29.357630][ T441] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.357932][ T441] ? __lock_acquire+0xb9a/0x1680 [ 29.358201][ T441] ? find_held_lock+0x2c/0x110 [ 29.358466][ T441] ? __lock_release+0x103/0x460 [ 29.358692][ T441] ? __virt_addr_valid+0x22b/0x430 [ 29.358852][ T441] ? __pfx___lock_release+0x10/0x10 [ 29.359009][ T441] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.359168][ T441] __sys_sendmsg+0x109/0x1a0 [ 29.359324][ T441] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.359480][ T441] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.359706][ T441] do_syscall_64+0xc1/0x1d0 [ 29.359854][ T441] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.360051][ T441] RIP: 0033:0x7ff4ec36f9a7 [ 29.360222][ T441] 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 [ 29.360830][ T441] RSP: 002b:00007ffeecf960b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.361060][ T441] RAX: ffffffffffffffda RBX: 00007ffeecf967e0 RCX: 00007ff4ec36f9a7 [ 29.361281][ T441] RDX: 0000000000000000 RSI: 00007ffeecf96120 RDI: 0000000000000005 [ 29.361499][ T441] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.361744][ T441] R10: 00007ff4ec22def8 R11: 0000000000000246 R12: 0000000000000002 [ 29.361963][ T441] R13: 00000000677904ba R14: 0000000000498600 R15: 0000000000000000 [ 29.362192][ T441]