[ 11.083792][ T249] ip (249) used greatest stack depth: 23248 bytes left [ 16.566818][ T336] 8021q: 802.1Q VLAN Support v1.8 [ 16.933895][ T341] gre: GRE over IPv4 demultiplexor driver [ 16.992128][ T341] ip6_gre: GRE over IPv6 tunneling driver [ 26.520566][ T417] GACT probability NOT on [ 44.926598][ T634] [ 44.926776][ T634] ============================================ [ 44.926984][ T634] WARNING: possible recursive locking detected [ 44.927172][ T634] 6.13.0-rc5-virtme #1 Not tainted [ 44.927319][ T634] -------------------------------------------- [ 44.927529][ T634] ip/634 is trying to acquire lock: [ 44.927704][ T634] ffffffffb4bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.928044][ T634] [ 44.928044][ T634] but task is already holding lock: [ 44.928301][ T634] ffffffffb4bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.928649][ T634] [ 44.928649][ T634] other info that might help us debug this: [ 44.928919][ T634] Possible unsafe locking scenario: [ 44.928919][ T634] [ 44.929177][ T634] CPU0 [ 44.929307][ T634] ---- [ 44.929433][ T634] lock((netdev_chain).rwsem); [ 44.929589][ T634] lock((netdev_chain).rwsem); [ 44.929752][ T634] [ 44.929752][ T634] *** DEADLOCK *** [ 44.929752][ T634] [ 44.929972][ T634] May be due to missing lock nesting notation [ 44.929972][ T634] [ 44.930243][ T634] 2 locks held by ip/634: [ 44.930373][ T634] #0: ffffffffb4be7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 44.930689][ T634] #1: ffffffffb4bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 44.930995][ T634] [ 44.930995][ T634] stack backtrace: [ 44.931176][ T634] CPU: 3 UID: 0 PID: 634 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 44.931402][ T634] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 44.931595][ T634] Call Trace: [ 44.931758][ T634] [ 44.931873][ T634] dump_stack_lvl+0x82/0xd0 [ 44.932031][ T634] print_deadlock_bug+0x40a/0x650 [ 44.932180][ T634] validate_chain+0x5bf/0xae0 [ 44.932331][ T634] ? __pfx_validate_chain+0x10/0x10 [ 44.932482][ T634] ? hlock_class+0x4e/0x130 [ 44.932646][ T634] ? mark_lock+0x38/0x3e0 [ 44.932786][ T634] __lock_acquire+0xb9a/0x1680 [ 44.932940][ T634] lock_acquire.part.0+0xeb/0x330 [ 44.933093][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 44.933276][ T634] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 44.933544][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.933731][ T634] ? trace_lock_acquire+0x14c/0x1f0 [ 44.933905][ T634] ? lock_acquire+0x32/0xc0 [ 44.934055][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 44.934255][ T634] down_read+0x9f/0x340 [ 44.934380][ T634] ? blocking_notifier_call_chain+0x50/0x90 [ 44.934567][ T634] ? __pfx_down_read+0x10/0x10 [ 44.934765][ T634] ? __lock_release+0x103/0x460 [ 44.934925][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 44.935076][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.935243][ T634] blocking_notifier_call_chain+0x50/0x90 [ 44.935431][ T634] __netdev_upper_dev_unlink+0xd9/0x220 [ 44.935584][ T634] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 44.935797][ T634] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 44.935976][ T634] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 44.936204][ T634] ? rtnl_is_locked+0x15/0x20 [ 44.936367][ T634] netdev_upper_dev_unlink+0x71/0xa0 [ 44.936514][ T634] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 44.936771][ T634] ? netconsole_netdev_event+0x2c1/0x620 [ 44.936923][ T634] ? mutex_is_locked+0x1c/0x60 [ 44.937073][ T634] ? rtnl_is_locked+0x15/0x20 [ 44.937225][ T634] ? netdev_master_upper_dev_get+0x13/0x120 [ 44.937406][ T634] vrf_device_event+0x78/0xe0 [vrf] [ 44.937611][ T634] notifier_call_chain+0xcd/0x150 [ 44.937779][ T634] blocking_notifier_call_chain+0x66/0x90 [ 44.937928][ T634] unregister_netdevice_many_notify+0xa7b/0x1580 [ 44.938112][ T634] ? __lock_release+0x103/0x460 [ 44.938261][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.938409][ T634] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 44.938605][ T634] ? hlock_class+0x4e/0x130 [ 44.938762][ T634] ? mark_held_locks+0x9e/0xe0 [ 44.938922][ T634] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 44.939127][ T634] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 44.939363][ T634] rtnl_dellink+0x348/0xa40 [ 44.939562][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.939793][ T634] ? find_held_lock+0x2c/0x110 [ 44.939971][ T634] ? __lock_release+0x103/0x460 [ 44.940159][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.940336][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.940494][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.940721][ T634] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 44.940900][ T634] ? __pfx_rtnl_dellink+0x10/0x10 [ 44.941051][ T634] rtnetlink_rcv_msg+0x712/0xc10 [ 44.941198][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.941394][ T634] ? hlock_class+0x4e/0x130 [ 44.941551][ T634] ? mark_lock+0x38/0x3e0 [ 44.941668][ T634] ? __lock_acquire+0xb9a/0x1680 [ 44.941815][ T634] netlink_rcv_skb+0x130/0x360 [ 44.941962][ T634] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 44.942108][ T634] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 44.942259][ T634] ? netlink_deliver_tap+0x13e/0x340 [ 44.942422][ T634] ? netlink_deliver_tap+0xc3/0x340 [ 44.942571][ T634] netlink_unicast+0x44b/0x710 [ 44.942716][ T634] ? __pfx_netlink_unicast+0x10/0x10 [ 44.942864][ T634] ? find_held_lock+0x2c/0x110 [ 44.943016][ T634] netlink_sendmsg+0x723/0xbe0 [ 44.943162][ T634] ? __pfx_netlink_sendmsg+0x10/0x10 [ 44.943310][ T634] ____sys_sendmsg+0x7ac/0xa10 [ 44.943467][ T634] ? __pfx_____sys_sendmsg+0x10/0x10 [ 44.943613][ T634] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 44.943799][ T634] ___sys_sendmsg+0xee/0x170 [ 44.943954][ T634] ? __pfx____sys_sendmsg+0x10/0x10 [ 44.944101][ T634] ? kasan_save_stack+0x34/0x50 [ 44.944250][ T634] ? kasan_save_stack+0x24/0x50 [ 44.944395][ T634] ? __kasan_record_aux_stack+0x8e/0xa0 [ 44.944551][ T634] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 44.944738][ T634] ? __x64_sys_close+0x7c/0xd0 [ 44.944890][ T634] ? do_syscall_64+0xc1/0x1d0 [ 44.945035][ T634] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.945226][ T634] ? __lock_acquire+0xb9a/0x1680 [ 44.945389][ T634] ? find_held_lock+0x2c/0x110 [ 44.945537][ T634] ? __lock_release+0x103/0x460 [ 44.945683][ T634] ? __virt_addr_valid+0x22b/0x430 [ 44.945839][ T634] ? __pfx___lock_release+0x10/0x10 [ 44.945987][ T634] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 44.946135][ T634] __sys_sendmsg+0x109/0x1a0 [ 44.946282][ T634] ? __pfx___sys_sendmsg+0x10/0x10 [ 44.946427][ T634] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 44.946616][ T634] do_syscall_64+0xc1/0x1d0 [ 44.946762][ T634] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 44.946954][ T634] RIP: 0033:0x7f8a9c5629a7 [ 44.947115][ 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 [ 44.947631][ T634] RSP: 002b:00007ffe2f118f08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.947869][ T634] RAX: ffffffffffffffda RBX: 00007ffe2f119630 RCX: 00007f8a9c5629a7 [ 44.948091][ T634] RDX: 0000000000000000 RSI: 00007ffe2f118f70 RDI: 0000000000000005 [ 44.948311][ T634] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 44.948532][ T634] R10: 00007f8a9c420ef8 R11: 0000000000000246 R12: 0000000000000002 [ 44.948760][ T634] R13: 0000000067792b5c R14: 0000000000498600 R15: 0000000000000000 [ 44.948987][ T634]