[ 16.596425][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 16.929285][ T341] gre: GRE over IPv4 demultiplexor driver [ 16.985266][ T341] ip6_gre: GRE over IPv6 tunneling driver [ 19.056365][ T371] ip (371) used greatest stack depth: 23208 bytes left [ 26.447189][ T417] GACT probability NOT on [ 44.069616][ T634] [ 44.069810][ T634] ============================================ [ 44.070053][ T634] WARNING: possible recursive locking detected [ 44.070318][ T634] 6.13.0-rc5-virtme #1 Not tainted [ 44.070496][ T634] -------------------------------------------- [ 44.070729][ T634] ip/634 is trying to acquire lock: [ 44.070929][ T634] ffffffffacdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.071359][ T634] [ 44.071359][ T634] but task is already holding lock: [ 44.071705][ T634] ffffffffacdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.072115][ T634] [ 44.072115][ T634] other info that might help us debug this: [ 44.072359][ T634] Possible unsafe locking scenario: [ 44.072359][ T634] [ 44.072654][ T634] CPU0 [ 44.072819][ T634] ---- [ 44.072979][ T634] lock((netdev_chain).rwsem); [ 44.073187][ T634] lock((netdev_chain).rwsem); [ 44.073361][ T634] [ 44.073361][ T634] *** DEADLOCK *** [ 44.073361][ T634] [ 44.073671][ T634] May be due to missing lock nesting notation [ 44.073671][ T634] [ 44.073964][ T634] 2 locks held by ip/634: [ 44.074130][ T634] #0: ffffffffacde7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 44.074496][ T634] #1: ffffffffacdd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.074920][ T634] [ 44.074920][ T634] stack backtrace: [ 44.075229][ T634] CPU: 3 UID: 0 PID: 634 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 44.075595][ T634] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.075818][ T634] Call Trace: [ 44.076006][ T634] [ 44.076093][ T634] dump_stack_lvl+0x82/0xd0 [ 44.076263][ T634] print_deadlock_bug+0x40a/0x650 [ 44.076429][ T634] validate_chain+0x5bf/0xae0 [ 44.076598][ T634] ? __pfx_validate_chain+0x10/0x10 [ 44.076769][ T634] ? hlock_class+0x4e/0x130 [ 44.076944][ T634] ? mark_lock+0x38/0x3e0 [ 44.077075][ T634] __lock_acquire+0xb9a/0x1680 [ 44.077240][ T634] lock_acquire.part.0+0xeb/0x330 [ 44.077402][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 44.077609][ T634] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 44.077822][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.078000][ T634] ? trace_lock_acquire+0x14c/0x1f0 [ 44.078164][ T634] ? lock_acquire+0x32/0xc0 [ 44.078329][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 44.078535][ T634] down_read+0x9f/0x340 [ 44.078661][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 44.078874][ T634] ? __pfx_down_read+0x10/0x10 [ 44.079037][ T634] ? __lock_release+0x103/0x460 [ 44.079201][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 44.079365][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.079540][ T634] blocking_notifier_call_chain+0x50/0x90 [ 44.079704][ T634] __netdev_upper_dev_unlink+0xd9/0x220 [ 44.079878][ T634] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 44.080086][ T634] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 44.080252][ T634] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 44.080458][ T634] ? rtnl_is_locked+0x15/0x20 [ 44.080629][ T634] netdev_upper_dev_unlink+0x71/0xa0 [ 44.080804][ T634] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 44.081018][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 44.081181][ T634] ? mutex_is_locked+0x1c/0x60 [ 44.081346][ T634] ? rtnl_is_locked+0x15/0x20 [ 44.081514][ T634] ? netdev_master_upper_dev_get+0x13/0x120 [ 44.081719][ T634] vrf_device_event+0x78/0xe0 [vrf] [ 44.081931][ T634] notifier_call_chain+0xcd/0x150 [ 44.082184][ T634] blocking_notifier_call_chain+0x66/0x90 [ 44.082358][ T634] unregister_netdevice_many_notify+0xa7b/0x1580 [ 44.082562][ T634] ? __lock_release+0x103/0x460 [ 44.082724][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.082900][ T634] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 44.083107][ T634] ? hlock_class+0x4e/0x130 [ 44.083277][ T634] ? mark_held_locks+0x9e/0xe0 [ 44.083439][ T634] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 44.083618][ T634] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 44.083834][ T634] rtnl_dellink+0x348/0xa40 [ 44.083999][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.084178][ T634] ? find_held_lock+0x2c/0x110 [ 44.084366][ T634] ? __lock_release+0x103/0x460 [ 44.084528][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.084694][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.084876][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.085083][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.085274][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.085449][ T634] rtnetlink_rcv_msg+0x712/0xc10 [ 44.085651][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.085851][ T634] ? hlock_class+0x4e/0x130 [ 44.086104][ T634] ? mark_lock+0x38/0x3e0 [ 44.086300][ T634] ? __lock_acquire+0xb9a/0x1680 [ 44.086487][ T634] netlink_rcv_skb+0x130/0x360 [ 44.086680][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.086866][ T634] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 44.087052][ T634] ? netlink_deliver_tap+0x13e/0x340 [ 44.087235][ T634] ? netlink_deliver_tap+0xc3/0x340 [ 44.087428][ T634] netlink_unicast+0x44b/0x710 [ 44.087594][ T634] ? __pfx_netlink_unicast+0x10/0x10 [ 44.087757][ T634] ? find_held_lock+0x2c/0x110 [ 44.087940][ T634] netlink_sendmsg+0x723/0xbe0 [ 44.088104][ T634] ? __pfx_netlink_sendmsg+0x10/0x10 [ 44.088272][ T634] ____sys_sendmsg+0x7ac/0xa10 [ 44.088490][ T634] ? __pfx_____sys_sendmsg+0x10/0x10 [ 44.088667][ T634] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 44.088919][ T634] ___sys_sendmsg+0xee/0x170 [ 44.089108][ T634] ? __pfx____sys_sendmsg+0x10/0x10 [ 44.089294][ T634] ? kasan_save_stack+0x34/0x50 [ 44.089460][ T634] ? kasan_save_stack+0x24/0x50 [ 44.089625][ T634] ? __kasan_record_aux_stack+0x8e/0xa0 [ 44.089789][ T634] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 44.090011][ T634] ? __x64_sys_close+0x7c/0xd0 [ 44.090177][ T634] ? do_syscall_64+0xc1/0x1d0 [ 44.090341][ T634] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.090597][ T634] ? __lock_acquire+0xb9a/0x1680 [ 44.090764][ T634] ? find_held_lock+0x2c/0x110 [ 44.090944][ T634] ? __lock_release+0x103/0x460 [ 44.091126][ T634] ? __virt_addr_valid+0x22b/0x430 [ 44.091293][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.091456][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.091622][ T634] __sys_sendmsg+0x109/0x1a0 [ 44.091790][ T634] ? __pfx___sys_sendmsg+0x10/0x10 [ 44.091961][ T634] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 44.092168][ T634] do_syscall_64+0xc1/0x1d0 [ 44.092333][ T634] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.092543][ T634] RIP: 0033:0x7f57bc99d9a7 [ 44.092715][ T634] 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 [ 44.093301][ T634] RSP: 002b:00007ffc1b955ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.093551][ T634] RAX: ffffffffffffffda RBX: 00007ffc1b956410 RCX: 00007f57bc99d9a7 [ 44.093803][ T634] RDX: 0000000000000000 RSI: 00007ffc1b955d50 RDI: 0000000000000005 [ 44.094079][ T634] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.094339][ T634] R10: 00007f57bc85bef8 R11: 0000000000000246 R12: 0000000000000002 [ 44.094586][ T634] R13: 0000000067795798 R14: 0000000000498600 R15: 0000000000000000 [ 44.094902][ T634]