[ 16.040010][ T334] 8021q: 802.1Q VLAN Support v1.8 [ 16.463219][ T340] gre: GRE over IPv4 demultiplexor driver [ 16.479553][ T340] ip_gre: GRE over IPv4 tunneling driver [ 16.674618][ T344] ip (344) used greatest stack depth: 23896 bytes left [ 16.792089][ T346] ip (346) used greatest stack depth: 23784 bytes left [ 29.748729][ T442] [ 29.748933][ T442] ============================================ [ 29.749127][ T442] WARNING: possible recursive locking detected [ 29.749309][ T442] 6.13.0-rc5-virtme #1 Not tainted [ 29.749461][ T442] -------------------------------------------- [ 29.749639][ T442] ip/442 is trying to acquire lock: [ 29.749785][ T442] ffffffffb4bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.750089][ T442] [ 29.750089][ T442] but task is already holding lock: [ 29.750303][ T442] ffffffffb4bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.750601][ T442] [ 29.750601][ T442] other info that might help us debug this: [ 29.750815][ T442] Possible unsafe locking scenario: [ 29.750815][ T442] [ 29.751025][ T442] CPU0 [ 29.751137][ T442] ---- [ 29.751244][ T442] lock((netdev_chain).rwsem); [ 29.751391][ T442] lock((netdev_chain).rwsem); [ 29.751537][ T442] [ 29.751537][ T442] *** DEADLOCK *** [ 29.751537][ T442] [ 29.751748][ T442] May be due to missing lock nesting notation [ 29.751748][ T442] [ 29.751990][ T442] 2 locks held by ip/442: [ 29.752126][ T442] #0: ffffffffb4be7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 29.752393][ T442] #1: ffffffffb4bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 29.752698][ T442] [ 29.752698][ T442] stack backtrace: [ 29.752880][ T442] CPU: 3 UID: 0 PID: 442 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 29.753108][ T442] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.753291][ T442] Call Trace: [ 29.753403][ T442] [ 29.753500][ T442] dump_stack_lvl+0x82/0xd0 [ 29.753650][ T442] print_deadlock_bug+0x40a/0x650 [ 29.753815][ T442] validate_chain+0x5bf/0xae0 [ 29.753963][ T442] ? __pfx_validate_chain+0x10/0x10 [ 29.754110][ T442] ? hlock_class+0x4e/0x130 [ 29.754260][ T442] ? mark_lock+0x38/0x3e0 [ 29.754375][ T442] __lock_acquire+0xb9a/0x1680 [ 29.754523][ T442] lock_acquire.part.0+0xeb/0x330 [ 29.754668][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.754854][ T442] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 29.755040][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.755188][ T442] ? trace_lock_acquire+0x14c/0x1f0 [ 29.755340][ T442] ? lock_acquire+0x32/0xc0 [ 29.755487][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.755671][ T442] down_read+0x9f/0x340 [ 29.755784][ T442] ? blocking_notifier_call_chain+0x50/0x90 [ 29.755965][ T442] ? __pfx_down_read+0x10/0x10 [ 29.756110][ T442] ? __lock_release+0x103/0x460 [ 29.756256][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 29.756409][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.756557][ T442] blocking_notifier_call_chain+0x50/0x90 [ 29.756705][ T442] __netdev_upper_dev_unlink+0xd9/0x220 [ 29.756856][ T442] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 29.757037][ T442] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 29.757184][ T442] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 29.757374][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.757522][ T442] netdev_upper_dev_unlink+0x71/0xa0 [ 29.757667][ T442] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 29.757859][ T442] ? netconsole_netdev_event+0x2c1/0x620 [ 29.758006][ T442] ? mutex_is_locked+0x1c/0x60 [ 29.758153][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.758297][ T442] ? netdev_master_upper_dev_get+0x13/0x120 [ 29.758486][ T442] vrf_device_event+0x78/0xe0 [vrf] [ 29.758649][ T442] notifier_call_chain+0xcd/0x150 [ 29.758803][ T442] blocking_notifier_call_chain+0x66/0x90 [ 29.758949][ T442] unregister_netdevice_many_notify+0xa7b/0x1580 [ 29.759134][ T442] ? find_held_lock+0x2c/0x110 [ 29.759285][ T442] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 29.759465][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.759618][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.759770][ T442] ? rtnl_is_locked+0x15/0x20 [ 29.759915][ T442] ? unregister_netdevice_queue+0x70/0x410 [ 29.760097][ T442] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 29.760279][ T442] ? net_generic+0xbb/0x1f0 [ 29.760428][ T442] rtnl_dellink+0x348/0xa40 [ 29.760576][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.760750][ T442] ? find_held_lock+0x2c/0x110 [ 29.760908][ T442] ? __lock_release+0x103/0x460 [ 29.761056][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.761241][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.761406][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.761568][ T442] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 29.761729][ T442] ? __pfx_rtnl_dellink+0x10/0x10 [ 29.761894][ T442] rtnetlink_rcv_msg+0x712/0xc10 [ 29.762068][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.762229][ T442] ? hlock_class+0x4e/0x130 [ 29.762389][ T442] ? mark_lock+0x38/0x3e0 [ 29.762513][ T442] ? __lock_acquire+0xb9a/0x1680 [ 29.762674][ T442] netlink_rcv_skb+0x130/0x360 [ 29.762838][ T442] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 29.762999][ T442] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 29.763170][ T442] ? netlink_deliver_tap+0x13e/0x340 [ 29.763334][ T442] ? netlink_deliver_tap+0xc3/0x340 [ 29.763498][ T442] netlink_unicast+0x44b/0x710 [ 29.763660][ T442] ? __pfx_netlink_unicast+0x10/0x10 [ 29.763821][ T442] ? find_held_lock+0x2c/0x110 [ 29.763984][ T442] netlink_sendmsg+0x723/0xbe0 [ 29.764148][ T442] ? __pfx_netlink_sendmsg+0x10/0x10 [ 29.764318][ T442] ____sys_sendmsg+0x7ac/0xa10 [ 29.764479][ T442] ? __pfx_____sys_sendmsg+0x10/0x10 [ 29.764637][ T442] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 29.764843][ T442] ___sys_sendmsg+0xee/0x170 [ 29.765004][ T442] ? __pfx____sys_sendmsg+0x10/0x10 [ 29.765168][ T442] ? kasan_save_stack+0x34/0x50 [ 29.765333][ T442] ? kasan_save_stack+0x24/0x50 [ 29.765498][ T442] ? __kasan_record_aux_stack+0x8e/0xa0 [ 29.765660][ T442] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 29.765878][ T442] ? __x64_sys_close+0x7c/0xd0 [ 29.766046][ T442] ? do_syscall_64+0xc1/0x1d0 [ 29.766196][ T442] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.766382][ T442] ? __lock_acquire+0xb9a/0x1680 [ 29.766535][ T442] ? find_held_lock+0x2c/0x110 [ 29.766689][ T442] ? __lock_release+0x103/0x460 [ 29.766837][ T442] ? __virt_addr_valid+0x22b/0x430 [ 29.766986][ T442] ? __pfx___lock_release+0x10/0x10 [ 29.767133][ T442] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.767282][ T442] __sys_sendmsg+0x109/0x1a0 [ 29.767430][ T442] ? __pfx___sys_sendmsg+0x10/0x10 [ 29.767576][ T442] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 29.767771][ T442] do_syscall_64+0xc1/0x1d0 [ 29.767922][ T442] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.768105][ T442] RIP: 0033:0x7fd7a0b729a7 [ 29.768274][ T442] 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 [ 29.768791][ T442] RSP: 002b:00007ffea33837c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 29.769023][ T442] RAX: ffffffffffffffda RBX: 00007ffea3383ef0 RCX: 00007fd7a0b729a7 [ 29.769245][ T442] RDX: 0000000000000000 RSI: 00007ffea3383830 RDI: 0000000000000005 [ 29.769469][ T442] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 29.769695][ T442] R10: 00007fd7a0a30ef8 R11: 0000000000000246 R12: 0000000000000002 [ 29.769915][ T442] R13: 0000000067792be4 R14: 0000000000498600 R15: 0000000000000000 [ 29.770142][ T442]