[ 79.558685][ T1042] 8021q: 802.1Q VLAN Support v1.8 [ 79.924096][ T1047] gre: GRE over IPv4 demultiplexor driver [ 79.938919][ T1047] ip_gre: GRE over IPv4 tunneling driver [ 97.549708][ T1148] [ 97.549918][ T1148] ============================================ [ 97.550109][ T1148] WARNING: possible recursive locking detected [ 97.550287][ T1148] 6.13.0-rc5-virtme #1 Not tainted [ 97.550436][ T1148] -------------------------------------------- [ 97.550613][ T1148] ip/1148 is trying to acquire lock: [ 97.550759][ T1148] ffffffffa8dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 97.551060][ T1148] [ 97.551060][ T1148] but task is already holding lock: [ 97.551275][ T1148] ffffffffa8dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 97.551564][ T1148] [ 97.551564][ T1148] other info that might help us debug this: [ 97.551774][ T1148] Possible unsafe locking scenario: [ 97.551774][ T1148] [ 97.551981][ T1148] CPU0 [ 97.552090][ T1148] ---- [ 97.552199][ T1148] lock((netdev_chain).rwsem); [ 97.552344][ T1148] lock((netdev_chain).rwsem); [ 97.552488][ T1148] [ 97.552488][ T1148] *** DEADLOCK *** [ 97.552488][ T1148] [ 97.552721][ T1148] May be due to missing lock nesting notation [ 97.552721][ T1148] [ 97.552935][ T1148] 2 locks held by ip/1148: [ 97.553083][ T1148] #0: ffffffffa8de7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 97.553354][ T1148] #1: ffffffffa8dd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 97.553646][ T1148] [ 97.553646][ T1148] stack backtrace: [ 97.553824][ T1148] CPU: 2 UID: 0 PID: 1148 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 97.554040][ T1148] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 97.554224][ T1148] Call Trace: [ 97.554334][ T1148] [ 97.554409][ T1148] dump_stack_lvl+0x82/0xd0 [ 97.554560][ T1148] print_deadlock_bug+0x40a/0x650 [ 97.554706][ T1148] validate_chain+0x5bf/0xae0 [ 97.554851][ T1148] ? __pfx_validate_chain+0x10/0x10 [ 97.554998][ T1148] ? hlock_class+0x4e/0x130 [ 97.555144][ T1148] ? mark_lock+0x38/0x3e0 [ 97.555260][ T1148] __lock_acquire+0xb9a/0x1680 [ 97.555407][ T1148] lock_acquire.part.0+0xeb/0x330 [ 97.555550][ T1148] ? blocking_notifier_call_chain+0x50/0x90 [ 97.555744][ T1148] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 97.555927][ T1148] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 97.556074][ T1148] ? trace_lock_acquire+0x14c/0x1f0 [ 97.556220][ T1148] ? lock_acquire+0x32/0xc0 [ 97.556370][ T1148] ? blocking_notifier_call_chain+0x50/0x90 [ 97.556551][ T1148] down_read+0x9f/0x340 [ 97.556661][ T1148] ? blocking_notifier_call_chain+0x50/0x90 [ 97.556843][ T1148] ? __pfx_down_read+0x10/0x10 [ 97.556990][ T1148] ? __lock_release+0x103/0x460 [ 97.557135][ T1148] ? netconsole_netdev_event+0x2c1/0x620 [ 97.557280][ T1148] ? __pfx___lock_release+0x10/0x10 [ 97.557431][ T1148] blocking_notifier_call_chain+0x50/0x90 [ 97.557578][ T1148] __netdev_upper_dev_unlink+0xd9/0x220 [ 97.557722][ T1148] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 97.557902][ T1148] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 97.558047][ T1148] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 97.558228][ T1148] ? rtnl_is_locked+0x15/0x20 [ 97.558380][ T1148] netdev_upper_dev_unlink+0x71/0xa0 [ 97.558542][ T1148] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 97.558735][ T1148] ? netconsole_netdev_event+0x2c1/0x620 [ 97.558886][ T1148] ? mutex_is_locked+0x1c/0x60 [ 97.559033][ T1148] ? rtnl_is_locked+0x15/0x20 [ 97.559191][ T1148] ? netdev_master_upper_dev_get+0x13/0x120 [ 97.559386][ T1148] vrf_device_event+0x78/0xe0 [vrf] [ 97.559545][ T1148] notifier_call_chain+0xcd/0x150 [ 97.559705][ T1148] blocking_notifier_call_chain+0x66/0x90 [ 97.559862][ T1148] unregister_netdevice_many_notify+0xa7b/0x1580 [ 97.560056][ T1148] ? __lock_release+0x103/0x460 [ 97.560212][ T1148] ? __pfx___lock_release+0x10/0x10 [ 97.560367][ T1148] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 97.560566][ T1148] ? hlock_class+0x4e/0x130 [ 97.560732][ T1148] ? mark_held_locks+0x9e/0xe0 [ 97.560889][ T1148] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 97.561050][ T1148] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 97.561242][ T1148] rtnl_dellink+0x348/0xa40 [ 97.561391][ T1148] ? __pfx_rtnl_dellink+0x10/0x10 [ 97.561561][ T1148] ? find_held_lock+0x2c/0x110 [ 97.561715][ T1148] ? __lock_release+0x103/0x460 [ 97.561874][ T1148] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 97.562032][ T1148] ? __pfx___lock_release+0x10/0x10 [ 97.562193][ T1148] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 97.562352][ T1148] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 97.562509][ T1148] ? __pfx_rtnl_dellink+0x10/0x10 [ 97.562684][ T1148] rtnetlink_rcv_msg+0x712/0xc10 [ 97.562840][ T1148] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 97.563000][ T1148] ? hlock_class+0x4e/0x130 [ 97.563159][ T1148] ? mark_lock+0x38/0x3e0 [ 97.563279][ T1148] ? __lock_acquire+0xb9a/0x1680 [ 97.563435][ T1148] netlink_rcv_skb+0x130/0x360 [ 97.563595][ T1148] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 97.563753][ T1148] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 97.563916][ T1148] ? netlink_deliver_tap+0x13e/0x340 [ 97.564075][ T1148] ? netlink_deliver_tap+0xc3/0x340 [ 97.564240][ T1148] netlink_unicast+0x44b/0x710 [ 97.564398][ T1148] ? __pfx_netlink_unicast+0x10/0x10 [ 97.564556][ T1148] ? find_held_lock+0x2c/0x110 [ 97.564716][ T1148] netlink_sendmsg+0x723/0xbe0 [ 97.564875][ T1148] ? __pfx_netlink_sendmsg+0x10/0x10 [ 97.565034][ T1148] ____sys_sendmsg+0x7ac/0xa10 [ 97.565192][ T1148] ? __pfx_____sys_sendmsg+0x10/0x10 [ 97.565353][ T1148] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 97.565557][ T1148] ___sys_sendmsg+0xee/0x170 [ 97.565751][ T1148] ? __pfx____sys_sendmsg+0x10/0x10 [ 97.565910][ T1148] ? kasan_save_stack+0x34/0x50 [ 97.566067][ T1148] ? kasan_save_stack+0x24/0x50 [ 97.566219][ T1148] ? __kasan_record_aux_stack+0x8e/0xa0 [ 97.566374][ T1148] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 97.566579][ T1148] ? __x64_sys_close+0x7c/0xd0 [ 97.566735][ T1148] ? do_syscall_64+0xc1/0x1d0 [ 97.566897][ T1148] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 97.567097][ T1148] ? __lock_acquire+0xb9a/0x1680 [ 97.567257][ T1148] ? find_held_lock+0x2c/0x110 [ 97.567416][ T1148] ? __lock_release+0x103/0x460 [ 97.567575][ T1148] ? __virt_addr_valid+0x22b/0x430 [ 97.567732][ T1148] ? __pfx___lock_release+0x10/0x10 [ 97.567892][ T1148] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 97.568053][ T1148] __sys_sendmsg+0x109/0x1a0 [ 97.568214][ T1148] ? __pfx___sys_sendmsg+0x10/0x10 [ 97.568373][ T1148] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 97.568574][ T1148] do_syscall_64+0xc1/0x1d0 [ 97.568735][ T1148] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 97.568936][ T1148] RIP: 0033:0x7f18a98749a7 [ 97.569103][ T1148] 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 [ 97.569631][ T1148] RSP: 002b:00007ffcc3d34aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 97.569867][ T1148] RAX: ffffffffffffffda RBX: 00007ffcc3d351d0 RCX: 00007f18a98749a7 [ 97.570111][ T1148] RDX: 0000000000000000 RSI: 00007ffcc3d34b10 RDI: 0000000000000005 [ 97.570347][ T1148] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 97.570587][ T1148] R10: 00007f18a9732ef8 R11: 0000000000000246 R12: 0000000000000002 [ 97.570825][ T1148] R13: 0000000067795475 R14: 0000000000498600 R15: 0000000000000000 [ 97.571071][ T1148]