[ 11.963056][ T274] ip (274) used greatest stack depth: 23968 bytes left [ 35.065519][ T578] [ 35.065678][ T578] ============================================ [ 35.065863][ T578] WARNING: possible recursive locking detected [ 35.066042][ T578] 6.13.0-rc5-virtme #1 Not tainted [ 35.066190][ T578] -------------------------------------------- [ 35.066366][ T578] ip/578 is trying to acquire lock: [ 35.066530][ T578] ffffffffa31f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 35.066840][ T578] [ 35.066840][ T578] but task is already holding lock: [ 35.067056][ T578] ffffffffa31f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 35.067353][ T578] [ 35.067353][ T578] other info that might help us debug this: [ 35.067566][ T578] Possible unsafe locking scenario: [ 35.067566][ T578] [ 35.067781][ T578] CPU0 [ 35.067893][ T578] ---- [ 35.068006][ T578] lock((netdev_chain).rwsem); [ 35.068149][ T578] lock((netdev_chain).rwsem); [ 35.068291][ T578] [ 35.068291][ T578] *** DEADLOCK *** [ 35.068291][ T578] [ 35.068506][ T578] May be due to missing lock nesting notation [ 35.068506][ T578] [ 35.068715][ T578] 2 locks held by ip/578: [ 35.068823][ T578] #0: ffffffffa3207e88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 35.069091][ T578] #1: ffffffffa31f6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 35.069384][ T578] [ 35.069384][ T578] stack backtrace: [ 35.069567][ T578] CPU: 2 UID: 0 PID: 578 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 35.069782][ T578] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 35.069966][ T578] Call Trace: [ 35.070076][ T578] [ 35.070152][ T578] dump_stack_lvl+0x82/0xd0 [ 35.070300][ T578] print_deadlock_bug+0x40a/0x650 [ 35.070449][ T578] validate_chain+0x5bf/0xae0 [ 35.070595][ T578] ? __pfx_validate_chain+0x10/0x10 [ 35.070756][ T578] ? hlock_class+0x4e/0x130 [ 35.070907][ T578] ? mark_lock+0x38/0x3e0 [ 35.071016][ T578] __lock_acquire+0xb9a/0x1680 [ 35.071166][ T578] lock_acquire.part.0+0xeb/0x330 [ 35.071315][ T578] ? blocking_notifier_call_chain+0x50/0x90 [ 35.071499][ T578] ? __lock_acquire+0xb9a/0x1680 [ 35.071649][ T578] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 35.071797][ T578] ? trace_lock_acquire+0x14c/0x1f0 [ 35.071944][ T578] ? lock_acquire+0x32/0xc0 [ 35.072087][ T578] ? blocking_notifier_call_chain+0x50/0x90 [ 35.072267][ T578] down_read+0x9f/0x340 [ 35.072377][ T578] ? blocking_notifier_call_chain+0x50/0x90 [ 35.072564][ T578] ? __pfx_down_read+0x10/0x10 [ 35.072710][ T578] ? __lock_release+0x103/0x460 [ 35.072855][ T578] blocking_notifier_call_chain+0x50/0x90 [ 35.072998][ T578] __netdev_upper_dev_unlink+0xd9/0x220 [ 35.073144][ T578] ? mark_held_locks+0x9e/0xe0 [ 35.073288][ T578] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 35.073465][ T578] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 35.073652][ T578] ? __try_to_del_timer_sync+0xe7/0x140 [ 35.073801][ T578] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 35.073979][ T578] ? mark_held_locks+0x9e/0xe0 [ 35.074124][ T578] netdev_upper_dev_unlink+0x71/0xa0 [ 35.074269][ T578] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 35.074448][ T578] ? mutex_is_locked+0x1c/0x60 [ 35.074593][ T578] ? rtnl_is_locked+0x15/0x20 [ 35.074742][ T578] ? netdev_master_upper_dev_get+0x13/0x120 [ 35.074923][ T578] vrf_device_event+0x78/0xe0 [ 35.075069][ T578] notifier_call_chain+0xcd/0x150 [ 35.075215][ T578] blocking_notifier_call_chain+0x66/0x90 [ 35.075365][ T578] unregister_netdevice_many_notify+0xa83/0x1580 [ 35.075546][ T578] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 35.075725][ T578] ? rtnl_dellink+0x228/0xa40 [ 35.075874][ T578] ? sock_def_readable+0x11e/0x300 [ 35.076024][ T578] ? __pfx___mutex_lock+0x10/0x10 [ 35.076172][ T578] ? rtnl_is_locked+0x15/0x20 [ 35.076320][ T578] ? unregister_netdevice_queue+0x70/0x410 [ 35.076500][ T578] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 35.076680][ T578] ? __nla_validate_parse+0x48/0x3d0 [ 35.076828][ T578] rtnl_dellink+0x348/0xa40 [ 35.076979][ T578] ? __pfx_rtnl_dellink+0x10/0x10 [ 35.077138][ T578] ? find_held_lock+0x2c/0x110 [ 35.077283][ T578] ? __lock_release+0x103/0x460 [ 35.077436][ T578] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 35.077579][ T578] ? __pfx___lock_release+0x10/0x10 [ 35.077723][ T578] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 35.077870][ T578] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 35.078019][ T578] ? __pfx_rtnl_dellink+0x10/0x10 [ 35.078163][ T578] rtnetlink_rcv_msg+0x712/0xc10 [ 35.078308][ T578] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 35.078452][ T578] ? hlock_class+0x4e/0x130 [ 35.078600][ T578] ? mark_lock+0x38/0x3e0 [ 35.078712][ T578] ? __lock_acquire+0xb9a/0x1680 [ 35.078859][ T578] netlink_rcv_skb+0x130/0x360 [ 35.079005][ T578] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 35.079152][ T578] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 35.079298][ T578] ? netlink_deliver_tap+0x13e/0x340 [ 35.079443][ T578] ? netlink_deliver_tap+0xc3/0x340 [ 35.079588][ T578] netlink_unicast+0x44b/0x710 [ 35.079734][ T578] ? __pfx_netlink_unicast+0x10/0x10 [ 35.079877][ T578] ? find_held_lock+0x2c/0x110 [ 35.080026][ T578] netlink_sendmsg+0x723/0xbe0 [ 35.080172][ T578] ? __pfx_netlink_sendmsg+0x10/0x10 [ 35.080319][ T578] ____sys_sendmsg+0x7ac/0xa10 [ 35.080462][ T578] ? __pfx_____sys_sendmsg+0x10/0x10 [ 35.080607][ T578] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 35.080790][ T578] ___sys_sendmsg+0xee/0x170 [ 35.080935][ T578] ? __pfx____sys_sendmsg+0x10/0x10 [ 35.081079][ T578] ? kasan_save_stack+0x34/0x50 [ 35.081231][ T578] ? kasan_save_stack+0x24/0x50 [ 35.081375][ T578] ? __kasan_record_aux_stack+0x8e/0xa0 [ 35.081519][ T578] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 35.081698][ T578] ? __x64_sys_close+0x7c/0xd0 [ 35.081845][ T578] ? do_syscall_64+0xc1/0x1d0 [ 35.081993][ T578] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 35.082175][ T578] ? __lock_acquire+0xb9a/0x1680 [ 35.082326][ T578] ? find_held_lock+0x2c/0x110 [ 35.082471][ T578] ? __lock_release+0x103/0x460 [ 35.082614][ T578] ? __virt_addr_valid+0x22b/0x430 [ 35.082761][ T578] ? __pfx___lock_release+0x10/0x10 [ 35.082905][ T578] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 35.083051][ T578] __sys_sendmsg+0x109/0x1a0 [ 35.083195][ T578] ? __pfx___sys_sendmsg+0x10/0x10 [ 35.083351][ T578] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 35.083537][ T578] do_syscall_64+0xc1/0x1d0 [ 35.083681][ T578] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 35.083859][ T578] RIP: 0033:0x7f02d7ec49a7 [ 35.084013][ T578] 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 [ 35.084531][ T578] RSP: 002b:00007ffede7686e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.084749][ T578] RAX: ffffffffffffffda RBX: 00007ffede768e20 RCX: 00007f02d7ec49a7 [ 35.084965][ T578] RDX: 0000000000000000 RSI: 00007ffede768750 RDI: 0000000000000005 [ 35.085187][ T578] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 35.085412][ T578] R10: 00007f02d7d824a8 R11: 0000000000000246 R12: 0000000000000002 [ 35.085635][ T578] R13: 0000000067790761 R14: 0000000000498600 R15: 0000000000000000 [ 35.085855][ T578] [ 35.118773][ T578] ip (578) used greatest stack depth: 23896 bytes left [ 53.026731][ T869] IPv6: Can't replace route, no match found [ 55.335291][ T939] IPv6: Can't replace route, no match found [ 98.246623][ T1857] Mirror/redirect action on [ 185.740760][ T2485] veth2: entered promiscuous mode [ 185.763822][ T2485] veth2: left promiscuous mode