[ 15.727734][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 16.088576][ T341] gre: GRE over IPv4 demultiplexor driver [ 16.130501][ T341] ip6_gre: GRE over IPv6 tunneling driver [ 18.222741][ T372] ip (372) used greatest stack depth: 22936 bytes left [ 25.537872][ T418] GACT probability NOT on [ 42.641382][ T635] [ 42.641543][ T635] ============================================ [ 42.641774][ T635] WARNING: possible recursive locking detected [ 42.641988][ T635] 6.13.0-rc5-virtme #1 Not tainted [ 42.642165][ T635] -------------------------------------------- [ 42.642379][ T635] ip/635 is trying to acquire lock: [ 42.642540][ T635] ffffffffa05d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.642894][ T635] [ 42.642894][ T635] but task is already holding lock: [ 42.643142][ T635] ffffffffa05d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.643478][ T635] [ 42.643478][ T635] other info that might help us debug this: [ 42.643739][ T635] Possible unsafe locking scenario: [ 42.643739][ T635] [ 42.643981][ T635] CPU0 [ 42.644104][ T635] ---- [ 42.644225][ T635] lock((netdev_chain).rwsem); [ 42.644385][ T635] lock((netdev_chain).rwsem); [ 42.644543][ T635] [ 42.644543][ T635] *** DEADLOCK *** [ 42.644543][ T635] [ 42.644776][ T635] May be due to missing lock nesting notation [ 42.644776][ T635] [ 42.645014][ T635] 2 locks held by ip/635: [ 42.645145][ T635] #0: ffffffffa05e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 42.645438][ T635] #1: ffffffffa05d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 42.645758][ T635] [ 42.645758][ T635] stack backtrace: [ 42.645955][ T635] CPU: 0 UID: 0 PID: 635 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 42.646215][ T635] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.646431][ T635] Call Trace: [ 42.646555][ T635] [ 42.646639][ T635] dump_stack_lvl+0x82/0xd0 [ 42.646805][ T635] print_deadlock_bug+0x40a/0x650 [ 42.646971][ T635] validate_chain+0x5bf/0xae0 [ 42.647136][ T635] ? __pfx_validate_chain+0x10/0x10 [ 42.647307][ T635] ? hlock_class+0x4e/0x130 [ 42.647466][ T635] ? mark_lock+0x38/0x3e0 [ 42.647590][ T635] __lock_acquire+0xb9a/0x1680 [ 42.647754][ T635] lock_acquire.part.0+0xeb/0x330 [ 42.647913][ T635] ? blocking_notifier_call_chain+0x50/0x90 [ 42.648145][ T635] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 42.648352][ T635] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.648520][ T635] ? trace_lock_acquire+0x14c/0x1f0 [ 42.648686][ T635] ? lock_acquire+0x32/0xc0 [ 42.648847][ T635] ? blocking_notifier_call_chain+0x50/0x90 [ 42.649048][ T635] down_read+0x9f/0x340 [ 42.649176][ T635] ? blocking_notifier_call_chain+0x50/0x90 [ 42.649379][ T635] ? __pfx_down_read+0x10/0x10 [ 42.649539][ T635] ? __lock_release+0x103/0x460 [ 42.649723][ T635] ? netconsole_netdev_event+0x2c1/0x620 [ 42.649884][ T635] ? __pfx___lock_release+0x10/0x10 [ 42.650060][ T635] blocking_notifier_call_chain+0x50/0x90 [ 42.650234][ T635] __netdev_upper_dev_unlink+0xd9/0x220 [ 42.650400][ T635] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 42.650600][ T635] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 42.650763][ T635] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 42.650967][ T635] ? rtnl_is_locked+0x15/0x20 [ 42.651132][ T635] netdev_upper_dev_unlink+0x71/0xa0 [ 42.651294][ T635] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 42.651515][ T635] ? netconsole_netdev_event+0x2c1/0x620 [ 42.651678][ T635] ? mutex_is_locked+0x1c/0x60 [ 42.651838][ T635] ? rtnl_is_locked+0x15/0x20 [ 42.652002][ T635] ? netdev_master_upper_dev_get+0x13/0x120 [ 42.652209][ T635] vrf_device_event+0x78/0xe0 [vrf] [ 42.652386][ T635] notifier_call_chain+0xcd/0x150 [ 42.652558][ T635] blocking_notifier_call_chain+0x66/0x90 [ 42.652725][ T635] unregister_netdevice_many_notify+0xa7b/0x1580 [ 42.652938][ T635] ? __lock_release+0x103/0x460 [ 42.653103][ T635] ? __pfx___lock_release+0x10/0x10 [ 42.653273][ T635] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 42.653487][ T635] ? hlock_class+0x4e/0x130 [ 42.653649][ T635] ? mark_held_locks+0x9e/0xe0 [ 42.653809][ T635] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 42.653969][ T635] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 42.654178][ T635] rtnl_dellink+0x348/0xa40 [ 42.654343][ T635] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.654520][ T635] ? find_held_lock+0x2c/0x110 [ 42.654681][ T635] ? __lock_release+0x103/0x460 [ 42.654838][ T635] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.654999][ T635] ? __pfx___lock_release+0x10/0x10 [ 42.655162][ T635] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.655324][ T635] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 42.655484][ T635] ? __pfx_rtnl_dellink+0x10/0x10 [ 42.655649][ T635] rtnetlink_rcv_msg+0x712/0xc10 [ 42.655809][ T635] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.655978][ T635] ? hlock_class+0x4e/0x130 [ 42.656139][ T635] ? mark_lock+0x38/0x3e0 [ 42.656265][ T635] ? __lock_acquire+0xb9a/0x1680 [ 42.656425][ T635] netlink_rcv_skb+0x130/0x360 [ 42.656586][ T635] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 42.656745][ T635] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 42.656913][ T635] ? netlink_deliver_tap+0x13e/0x340 [ 42.657088][ T635] ? netlink_deliver_tap+0xc3/0x340 [ 42.657258][ T635] netlink_unicast+0x44b/0x710 [ 42.657420][ T635] ? __pfx_netlink_unicast+0x10/0x10 [ 42.657581][ T635] ? find_held_lock+0x2c/0x110 [ 42.657744][ T635] netlink_sendmsg+0x723/0xbe0 [ 42.657903][ T635] ? __pfx_netlink_sendmsg+0x10/0x10 [ 42.658081][ T635] ____sys_sendmsg+0x7ac/0xa10 [ 42.658254][ T635] ? __pfx_____sys_sendmsg+0x10/0x10 [ 42.658415][ T635] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 42.658618][ T635] ___sys_sendmsg+0xee/0x170 [ 42.658777][ T635] ? __pfx____sys_sendmsg+0x10/0x10 [ 42.658940][ T635] ? kasan_save_stack+0x34/0x50 [ 42.659105][ T635] ? kasan_save_stack+0x24/0x50 [ 42.659268][ T635] ? __kasan_record_aux_stack+0x8e/0xa0 [ 42.659428][ T635] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 42.659649][ T635] ? __x64_sys_close+0x7c/0xd0 [ 42.659811][ T635] ? do_syscall_64+0xc1/0x1d0 [ 42.659972][ T635] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.660176][ T635] ? __lock_acquire+0xb9a/0x1680 [ 42.660339][ T635] ? find_held_lock+0x2c/0x110 [ 42.660502][ T635] ? __lock_release+0x103/0x460 [ 42.660661][ T635] ? __virt_addr_valid+0x22b/0x430 [ 42.660824][ T635] ? __pfx___lock_release+0x10/0x10 [ 42.660984][ T635] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 42.661156][ T635] __sys_sendmsg+0x109/0x1a0 [ 42.661315][ T635] ? __pfx___sys_sendmsg+0x10/0x10 [ 42.661477][ T635] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 42.661687][ T635] do_syscall_64+0xc1/0x1d0 [ 42.661846][ T635] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 42.662047][ T635] RIP: 0033:0x7f69d801e9a7 [ 42.662226][ T635] 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 [ 42.662797][ T635] RSP: 002b:00007ffe80f080c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.663040][ T635] RAX: ffffffffffffffda RBX: 00007ffe80f087f0 RCX: 00007f69d801e9a7 [ 42.663282][ T635] RDX: 0000000000000000 RSI: 00007ffe80f08130 RDI: 0000000000000005 [ 42.663524][ T635] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.663763][ T635] R10: 00007f69d7edcef8 R11: 0000000000000246 R12: 0000000000000002 [ 42.664013][ T635] R13: 0000000067790449 R14: 0000000000498600 R15: 0000000000000000 [ 42.664261][ T635]