[ 14.239845][ T314] 8021q: 802.1Q VLAN Support v1.8 [ 14.573795][ T319] gre: GRE over IPv4 demultiplexor driver [ 14.598512][ T319] ip_gre: GRE over IPv4 tunneling driver [ 32.000478][ T417] [ 32.000652][ T417] ============================================ [ 32.000946][ T417] WARNING: possible recursive locking detected [ 32.001233][ T417] 6.13.0-rc5-virtme #1 Not tainted [ 32.001465][ T417] -------------------------------------------- [ 32.001762][ T417] ip/417 is trying to acquire lock: [ 32.001998][ T417] ffffffffb29d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.002481][ T417] [ 32.002481][ T417] but task is already holding lock: [ 32.002823][ T417] ffffffffb29d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.003292][ T417] [ 32.003292][ T417] other info that might help us debug this: [ 32.003637][ T417] Possible unsafe locking scenario: [ 32.003637][ T417] [ 32.003977][ T417] CPU0 [ 32.004148][ T417] ---- [ 32.004320][ T417] lock((netdev_chain).rwsem); [ 32.004550][ T417] lock((netdev_chain).rwsem); [ 32.004782][ T417] [ 32.004782][ T417] *** DEADLOCK *** [ 32.004782][ T417] [ 32.005124][ T417] May be due to missing lock nesting notation [ 32.005124][ T417] [ 32.005466][ T417] 2 locks held by ip/417: [ 32.005646][ T417] #0: ffffffffb29e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 32.006075][ T417] #1: ffffffffb29d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 32.006560][ T417] [ 32.006560][ T417] stack backtrace: [ 32.006849][ T417] CPU: 0 UID: 0 PID: 417 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 32.007206][ T417] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.007505][ T417] Call Trace: [ 32.007695][ T417] [ 32.007819][ T417] dump_stack_lvl+0x82/0xd0 [ 32.008064][ T417] print_deadlock_bug+0x40a/0x650 [ 32.008297][ T417] validate_chain+0x5bf/0xae0 [ 32.008539][ T417] ? __pfx_validate_chain+0x10/0x10 [ 32.008780][ T417] ? hlock_class+0x4e/0x130 [ 32.009019][ T417] ? mark_lock+0x38/0x3e0 [ 32.009205][ T417] __lock_acquire+0xb9a/0x1680 [ 32.009461][ T417] lock_acquire.part.0+0xeb/0x330 [ 32.009708][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 32.010005][ T417] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 32.010288][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.010514][ T417] ? trace_lock_acquire+0x14c/0x1f0 [ 32.010735][ T417] ? lock_acquire+0x32/0xc0 [ 32.010954][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 32.011232][ T417] down_read+0x9f/0x340 [ 32.011400][ T417] ? blocking_notifier_call_chain+0x50/0x90 [ 32.011672][ T417] ? __pfx_down_read+0x10/0x10 [ 32.011892][ T417] ? __lock_release+0x103/0x460 [ 32.012109][ T417] ? netconsole_netdev_event+0x2c1/0x620 [ 32.012331][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.012551][ T417] blocking_notifier_call_chain+0x50/0x90 [ 32.012776][ T417] __netdev_upper_dev_unlink+0xd9/0x220 [ 32.012997][ T417] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 32.013267][ T417] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 32.013488][ T417] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 32.013759][ T417] ? rtnl_is_locked+0x15/0x20 [ 32.013979][ T417] netdev_upper_dev_unlink+0x71/0xa0 [ 32.014197][ T417] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 32.014482][ T417] ? netconsole_netdev_event+0x2c1/0x620 [ 32.014700][ T417] ? mutex_is_locked+0x1c/0x60 [ 32.014917][ T417] ? rtnl_is_locked+0x15/0x20 [ 32.015133][ T417] ? netdev_master_upper_dev_get+0x13/0x120 [ 32.015401][ T417] vrf_device_event+0x78/0xe0 [vrf] [ 32.015631][ T417] notifier_call_chain+0xcd/0x150 [ 32.015851][ T417] blocking_notifier_call_chain+0x66/0x90 [ 32.016079][ T417] unregister_netdevice_many_notify+0xa7b/0x1580 [ 32.016350][ T417] ? __lock_release+0x103/0x460 [ 32.016568][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.016787][ T417] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 32.017058][ T417] ? hlock_class+0x4e/0x130 [ 32.017276][ T417] ? mark_held_locks+0x9e/0xe0 [ 32.017496][ T417] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 32.017723][ T417] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.018004][ T417] rtnl_dellink+0x348/0xa40 [ 32.018226][ T417] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.018471][ T417] ? find_held_lock+0x2c/0x110 [ 32.018690][ T417] ? __lock_release+0x103/0x460 [ 32.018909][ T417] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.019129][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.019363][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.019601][ T417] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 32.019820][ T417] ? __pfx_rtnl_dellink+0x10/0x10 [ 32.020040][ T417] rtnetlink_rcv_msg+0x712/0xc10 [ 32.020261][ T417] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.020481][ T417] ? hlock_class+0x4e/0x130 [ 32.020699][ T417] ? mark_lock+0x38/0x3e0 [ 32.020874][ T417] ? __lock_acquire+0xb9a/0x1680 [ 32.021092][ T417] netlink_rcv_skb+0x130/0x360 [ 32.021314][ T417] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 32.021535][ T417] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 32.021761][ T417] ? netlink_deliver_tap+0x13e/0x340 [ 32.021981][ T417] ? netlink_deliver_tap+0xc3/0x340 [ 32.022200][ T417] netlink_unicast+0x44b/0x710 [ 32.022429][ T417] ? __pfx_netlink_unicast+0x10/0x10 [ 32.022648][ T417] ? find_held_lock+0x2c/0x110 [ 32.022872][ T417] netlink_sendmsg+0x723/0xbe0 [ 32.023092][ T417] ? __pfx_netlink_sendmsg+0x10/0x10 [ 32.023318][ T417] ____sys_sendmsg+0x7ac/0xa10 [ 32.023542][ T417] ? __pfx_____sys_sendmsg+0x10/0x10 [ 32.023759][ T417] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 32.024046][ T417] ___sys_sendmsg+0xee/0x170 [ 32.024267][ T417] ? __pfx____sys_sendmsg+0x10/0x10 [ 32.024490][ T417] ? kasan_save_stack+0x34/0x50 [ 32.024710][ T417] ? kasan_save_stack+0x24/0x50 [ 32.024929][ T417] ? __kasan_record_aux_stack+0x8e/0xa0 [ 32.025150][ T417] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 32.025425][ T417] ? __x64_sys_close+0x7c/0xd0 [ 32.025658][ T417] ? do_syscall_64+0xc1/0x1d0 [ 32.025877][ T417] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.026164][ T417] ? __lock_acquire+0xb9a/0x1680 [ 32.026399][ T417] ? find_held_lock+0x2c/0x110 [ 32.026629][ T417] ? __lock_release+0x103/0x460 [ 32.026862][ T417] ? __virt_addr_valid+0x22b/0x430 [ 32.027100][ T417] ? __pfx___lock_release+0x10/0x10 [ 32.027330][ T417] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.027573][ T417] __sys_sendmsg+0x109/0x1a0 [ 32.027813][ T417] ? __pfx___sys_sendmsg+0x10/0x10 [ 32.028045][ T417] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 32.028345][ T417] do_syscall_64+0xc1/0x1d0 [ 32.028579][ T417] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.028870][ T417] RIP: 0033:0x7f25301169a7 [ 32.029116][ T417] 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 [ 32.029812][ T417] RSP: 002b:00007ffec78b8328 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 32.030037][ T417] RAX: ffffffffffffffda RBX: 00007ffec78b8a50 RCX: 00007f25301169a7 [ 32.030265][ T417] RDX: 0000000000000000 RSI: 00007ffec78b8390 RDI: 0000000000000005 [ 32.030483][ T417] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 32.030701][ T417] R10: 00007f252ffd4ef8 R11: 0000000000000246 R12: 0000000000000002 [ 32.030920][ T417] R13: 000000006779015f R14: 0000000000498600 R15: 0000000000000000 [ 32.031143][ T417]