[ 47.264906][ T790] 8021q: 802.1Q VLAN Support v1.8 [ 47.732707][ T796] gre: GRE over IPv4 demultiplexor driver [ 47.758860][ T796] ip_gre: GRE over IPv4 tunneling driver [ 61.260981][ T901] [ 61.261123][ T901] ============================================ [ 61.261324][ T901] WARNING: possible recursive locking detected [ 61.261507][ T901] 6.13.0-rc5-virtme #1 Not tainted [ 61.261659][ T901] -------------------------------------------- [ 61.261864][ T901] ip/901 is trying to acquire lock: [ 61.262022][ T901] ffffffff9a3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 61.262343][ T901] [ 61.262343][ T901] but task is already holding lock: [ 61.262559][ T901] ffffffff9a3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 61.262860][ T901] [ 61.262860][ T901] other info that might help us debug this: [ 61.263102][ T901] Possible unsafe locking scenario: [ 61.263102][ T901] [ 61.263330][ T901] CPU0 [ 61.263453][ T901] ---- [ 61.263576][ T901] lock((netdev_chain).rwsem); [ 61.263742][ T901] lock((netdev_chain).rwsem); [ 61.263888][ T901] [ 61.263888][ T901] *** DEADLOCK *** [ 61.263888][ T901] [ 61.264112][ T901] May be due to missing lock nesting notation [ 61.264112][ T901] [ 61.264333][ T901] 2 locks held by ip/901: [ 61.264455][ T901] #0: ffffffff9a3e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 61.264748][ T901] #1: ffffffff9a3d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 61.265067][ T901] [ 61.265067][ T901] stack backtrace: [ 61.265252][ T901] CPU: 2 UID: 0 PID: 901 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 61.265513][ T901] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 61.265700][ T901] Call Trace: [ 61.265814][ T901] [ 61.265892][ T901] dump_stack_lvl+0x82/0xd0 [ 61.266048][ T901] print_deadlock_bug+0x40a/0x650 [ 61.266201][ T901] validate_chain+0x5bf/0xae0 [ 61.266352][ T901] ? __pfx_validate_chain+0x10/0x10 [ 61.266506][ T901] ? hlock_class+0x4e/0x130 [ 61.266655][ T901] ? mark_lock+0x38/0x3e0 [ 61.266769][ T901] __lock_acquire+0xb9a/0x1680 [ 61.266923][ T901] lock_acquire.part.0+0xeb/0x330 [ 61.267079][ T901] ? blocking_notifier_call_chain+0x50/0x90 [ 61.267267][ T901] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 61.267456][ T901] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.267607][ T901] ? trace_lock_acquire+0x14c/0x1f0 [ 61.267757][ T901] ? lock_acquire+0x32/0xc0 [ 61.267907][ T901] ? blocking_notifier_call_chain+0x50/0x90 [ 61.268102][ T901] down_read+0x9f/0x340 [ 61.268218][ T901] ? blocking_notifier_call_chain+0x50/0x90 [ 61.268402][ T901] ? __pfx_down_read+0x10/0x10 [ 61.268553][ T901] ? __lock_release+0x103/0x460 [ 61.268704][ T901] ? netconsole_netdev_event+0x2c1/0x620 [ 61.268855][ T901] ? __pfx___lock_release+0x10/0x10 [ 61.269011][ T901] blocking_notifier_call_chain+0x50/0x90 [ 61.269162][ T901] __netdev_upper_dev_unlink+0xd9/0x220 [ 61.269318][ T901] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 61.269505][ T901] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 61.269653][ T901] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 61.269839][ T901] ? rtnl_is_locked+0x15/0x20 [ 61.269989][ T901] netdev_upper_dev_unlink+0x71/0xa0 [ 61.270135][ T901] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 61.270325][ T901] ? netconsole_netdev_event+0x2c1/0x620 [ 61.270474][ T901] ? mutex_is_locked+0x1c/0x60 [ 61.270625][ T901] ? rtnl_is_locked+0x15/0x20 [ 61.270773][ T901] ? netdev_master_upper_dev_get+0x13/0x120 [ 61.270958][ T901] vrf_device_event+0x78/0xe0 [vrf] [ 61.271111][ T901] notifier_call_chain+0xcd/0x150 [ 61.271259][ T901] blocking_notifier_call_chain+0x66/0x90 [ 61.271408][ T901] unregister_netdevice_many_notify+0xa7b/0x1580 [ 61.271594][ T901] ? find_held_lock+0x2c/0x110 [ 61.271744][ T901] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 61.271928][ T901] ? __pfx___lock_release+0x10/0x10 [ 61.272079][ T901] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.272230][ T901] ? rtnl_is_locked+0x15/0x20 [ 61.272376][ T901] ? unregister_netdevice_queue+0x70/0x410 [ 61.272565][ T901] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 61.272750][ T901] ? net_generic+0xbb/0x1f0 [ 61.272903][ T901] rtnl_dellink+0x348/0xa40 [ 61.273053][ T901] ? __pfx_rtnl_dellink+0x10/0x10 [ 61.273217][ T901] ? find_held_lock+0x2c/0x110 [ 61.273368][ T901] ? __lock_release+0x103/0x460 [ 61.273513][ T901] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 61.273664][ T901] ? __pfx___lock_release+0x10/0x10 [ 61.273811][ T901] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.273961][ T901] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 61.274107][ T901] ? __pfx_rtnl_dellink+0x10/0x10 [ 61.274262][ T901] rtnetlink_rcv_msg+0x712/0xc10 [ 61.274409][ T901] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 61.274557][ T901] ? hlock_class+0x4e/0x130 [ 61.274723][ T901] ? mark_lock+0x38/0x3e0 [ 61.274836][ T901] ? __lock_acquire+0xb9a/0x1680 [ 61.274985][ T901] netlink_rcv_skb+0x130/0x360 [ 61.275174][ T901] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 61.275325][ T901] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 61.275479][ T901] ? netlink_deliver_tap+0x13e/0x340 [ 61.275638][ T901] ? netlink_deliver_tap+0xc3/0x340 [ 61.275795][ T901] netlink_unicast+0x44b/0x710 [ 61.275955][ T901] ? __pfx_netlink_unicast+0x10/0x10 [ 61.276108][ T901] ? find_held_lock+0x2c/0x110 [ 61.276274][ T901] netlink_sendmsg+0x723/0xbe0 [ 61.276426][ T901] ? __pfx_netlink_sendmsg+0x10/0x10 [ 61.276578][ T901] ____sys_sendmsg+0x7ac/0xa10 [ 61.276727][ T901] ? __pfx_____sys_sendmsg+0x10/0x10 [ 61.276885][ T901] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 61.277091][ T901] ___sys_sendmsg+0xee/0x170 [ 61.277244][ T901] ? __pfx____sys_sendmsg+0x10/0x10 [ 61.277399][ T901] ? kasan_save_stack+0x34/0x50 [ 61.277562][ T901] ? kasan_save_stack+0x24/0x50 [ 61.277711][ T901] ? __kasan_record_aux_stack+0x8e/0xa0 [ 61.277859][ T901] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 61.278044][ T901] ? __x64_sys_close+0x7c/0xd0 [ 61.278205][ T901] ? do_syscall_64+0xc1/0x1d0 [ 61.278354][ T901] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.278545][ T901] ? __lock_acquire+0xb9a/0x1680 [ 61.278696][ T901] ? find_held_lock+0x2c/0x110 [ 61.278854][ T901] ? __lock_release+0x103/0x460 [ 61.279010][ T901] ? __virt_addr_valid+0x22b/0x430 [ 61.279171][ T901] ? __pfx___lock_release+0x10/0x10 [ 61.279320][ T901] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 61.279469][ T901] __sys_sendmsg+0x109/0x1a0 [ 61.279631][ T901] ? __pfx___sys_sendmsg+0x10/0x10 [ 61.279789][ T901] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 61.279994][ T901] do_syscall_64+0xc1/0x1d0 [ 61.280152][ T901] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.280347][ T901] RIP: 0033:0x7f23544e09a7 [ 61.280511][ T901] 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 [ 61.281057][ T901] RSP: 002b:00007fff50f53668 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 61.281305][ T901] RAX: ffffffffffffffda RBX: 00007fff50f53d90 RCX: 00007f23544e09a7 [ 61.281529][ T901] RDX: 0000000000000000 RSI: 00007fff50f536d0 RDI: 0000000000000005 [ 61.281757][ T901] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 61.282004][ T901] R10: 00007f235439eef8 R11: 0000000000000246 R12: 0000000000000002 [ 61.282237][ T901] R13: 000000006779547b R14: 0000000000498600 R15: 0000000000000000 [ 61.282475][ T901]