[ 18.182234][ T353] 8021q: 802.1Q VLAN Support v1.8 [ 18.612038][ T359] gre: GRE over IPv4 demultiplexor driver [ 18.666937][ T359] ip6_gre: GRE over IPv6 tunneling driver [ 28.822254][ T442] GACT probability NOT on [ 46.033192][ T655] [ 46.033362][ T655] ============================================ [ 46.033565][ T655] WARNING: possible recursive locking detected [ 46.033765][ T655] 6.13.0-rc5-virtme #1 Not tainted [ 46.033926][ T655] -------------------------------------------- [ 46.034119][ T655] ip/655 is trying to acquire lock: [ 46.034286][ T655] ffffffffac1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.034614][ T655] [ 46.034614][ T655] but task is already holding lock: [ 46.034858][ T655] ffffffffac1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.035214][ T655] [ 46.035214][ T655] other info that might help us debug this: [ 46.035471][ T655] Possible unsafe locking scenario: [ 46.035471][ T655] [ 46.035721][ T655] CPU0 [ 46.035859][ T655] ---- [ 46.035987][ T655] lock((netdev_chain).rwsem); [ 46.036160][ T655] lock((netdev_chain).rwsem); [ 46.036355][ T655] [ 46.036355][ T655] *** DEADLOCK *** [ 46.036355][ T655] [ 46.036610][ T655] May be due to missing lock nesting notation [ 46.036610][ T655] [ 46.036856][ T655] 2 locks held by ip/655: [ 46.036977][ T655] #0: ffffffffac1e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 46.037273][ T655] #1: ffffffffac1d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 46.037602][ T655] [ 46.037602][ T655] stack backtrace: [ 46.037800][ T655] CPU: 2 UID: 0 PID: 655 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 46.038039][ T655] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 46.038236][ T655] Call Trace: [ 46.038427][ T655] [ 46.038527][ T655] dump_stack_lvl+0x82/0xd0 [ 46.038699][ T655] print_deadlock_bug+0x40a/0x650 [ 46.038862][ T655] validate_chain+0x5bf/0xae0 [ 46.039021][ T655] ? __pfx_validate_chain+0x10/0x10 [ 46.039182][ T655] ? hlock_class+0x4e/0x130 [ 46.039347][ T655] ? mark_lock+0x38/0x3e0 [ 46.039470][ T655] __lock_acquire+0xb9a/0x1680 [ 46.039628][ T655] lock_acquire.part.0+0xeb/0x330 [ 46.039798][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 46.040011][ T655] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 46.040212][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.040376][ T655] ? trace_lock_acquire+0x14c/0x1f0 [ 46.040535][ T655] ? lock_acquire+0x32/0xc0 [ 46.040698][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 46.040897][ T655] down_read+0x9f/0x340 [ 46.041018][ T655] ? blocking_notifier_call_chain+0x50/0x90 [ 46.041221][ T655] ? __pfx_down_read+0x10/0x10 [ 46.041390][ T655] ? __lock_release+0x103/0x460 [ 46.041548][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 46.041713][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.041871][ T655] blocking_notifier_call_chain+0x50/0x90 [ 46.042039][ T655] __netdev_upper_dev_unlink+0xd9/0x220 [ 46.042204][ T655] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 46.042413][ T655] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 46.042570][ T655] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 46.042766][ T655] ? rtnl_is_locked+0x15/0x20 [ 46.042927][ T655] netdev_upper_dev_unlink+0x71/0xa0 [ 46.043086][ T655] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 46.043293][ T655] ? netconsole_netdev_event+0x2c1/0x620 [ 46.043458][ T655] ? mutex_is_locked+0x1c/0x60 [ 46.043617][ T655] ? rtnl_is_locked+0x15/0x20 [ 46.043777][ T655] ? netdev_master_upper_dev_get+0x13/0x120 [ 46.043972][ T655] vrf_device_event+0x78/0xe0 [vrf] [ 46.044134][ T655] notifier_call_chain+0xcd/0x150 [ 46.044306][ T655] blocking_notifier_call_chain+0x66/0x90 [ 46.044466][ T655] unregister_netdevice_many_notify+0xa7b/0x1580 [ 46.044674][ T655] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 46.044890][ T655] ? net_generic+0xb1/0x1f0 [ip6_gre] [ 46.045070][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.045232][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.045403][ T655] ? rtnl_is_locked+0x15/0x20 [ 46.045559][ T655] ? unregister_netdevice_queue+0x70/0x410 [ 46.045772][ T655] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 46.045969][ T655] ? net_generic+0xbb/0x1f0 [ip6_gre] [ 46.046132][ T655] rtnl_dellink+0x348/0xa40 [ 46.046304][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.046476][ T655] ? find_held_lock+0x2c/0x110 [ 46.046635][ T655] ? __lock_release+0x103/0x460 [ 46.046797][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.046962][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.047121][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.047290][ T655] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 46.047448][ T655] ? __pfx_rtnl_dellink+0x10/0x10 [ 46.047607][ T655] rtnetlink_rcv_msg+0x712/0xc10 [ 46.047765][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.047923][ T655] ? hlock_class+0x4e/0x130 [ 46.048084][ T655] ? mark_lock+0x38/0x3e0 [ 46.048205][ T655] ? __lock_acquire+0xb9a/0x1680 [ 46.048375][ T655] netlink_rcv_skb+0x130/0x360 [ 46.048534][ T655] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 46.048692][ T655] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 46.048855][ T655] ? netlink_deliver_tap+0x13e/0x340 [ 46.049037][ T655] ? netlink_deliver_tap+0xc3/0x340 [ 46.049230][ T655] netlink_unicast+0x44b/0x710 [ 46.049400][ T655] ? __pfx_netlink_unicast+0x10/0x10 [ 46.049559][ T655] ? find_held_lock+0x2c/0x110 [ 46.049719][ T655] netlink_sendmsg+0x723/0xbe0 [ 46.049875][ T655] ? __pfx_netlink_sendmsg+0x10/0x10 [ 46.050035][ T655] ____sys_sendmsg+0x7ac/0xa10 [ 46.050196][ T655] ? __pfx_____sys_sendmsg+0x10/0x10 [ 46.050392][ T655] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 46.050599][ T655] ___sys_sendmsg+0xee/0x170 [ 46.050756][ T655] ? __pfx____sys_sendmsg+0x10/0x10 [ 46.050916][ T655] ? kasan_save_stack+0x34/0x50 [ 46.051076][ T655] ? kasan_save_stack+0x24/0x50 [ 46.051263][ T655] ? __kasan_record_aux_stack+0x8e/0xa0 [ 46.051425][ T655] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 46.051627][ T655] ? __x64_sys_close+0x7c/0xd0 [ 46.051800][ T655] ? do_syscall_64+0xc1/0x1d0 [ 46.051958][ T655] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.052158][ T655] ? __lock_acquire+0xb9a/0x1680 [ 46.052334][ T655] ? find_held_lock+0x2c/0x110 [ 46.052495][ T655] ? __lock_release+0x103/0x460 [ 46.052653][ T655] ? __virt_addr_valid+0x22b/0x430 [ 46.052817][ T655] ? __pfx___lock_release+0x10/0x10 [ 46.052985][ T655] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 46.053148][ T655] __sys_sendmsg+0x109/0x1a0 [ 46.053315][ T655] ? __pfx___sys_sendmsg+0x10/0x10 [ 46.053475][ T655] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 46.053678][ T655] do_syscall_64+0xc1/0x1d0 [ 46.053836][ T655] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 46.054032][ T655] RIP: 0033:0x7f5f492e09a7 [ 46.054207][ T655] 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 [ 46.054770][ T655] RSP: 002b:00007fff1ff7da08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.055015][ T655] RAX: ffffffffffffffda RBX: 00007fff1ff7e130 RCX: 00007f5f492e09a7 [ 46.055267][ T655] RDX: 0000000000000000 RSI: 00007fff1ff7da70 RDI: 0000000000000005 [ 46.055509][ T655] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 46.055754][ T655] R10: 00007f5f4919eef8 R11: 0000000000000246 R12: 0000000000000002 [ 46.056008][ T655] R13: 00000000677900b2 R14: 0000000000498600 R15: 0000000000000000 [ 46.056267][ T655]