[ 11.280081][ T251] ip (251) used greatest stack depth: 24280 bytes left [ 16.331488][ T324] gre: GRE over IPv4 demultiplexor driver [ 16.399723][ T324] ip6_gre: GRE over IPv6 tunneling driver [ 18.101185][ T345] 8021q: 802.1Q VLAN Support v1.8 [ 21.557090][ T383] GACT probability NOT on [ 178.783934][ T573] ip (573) used greatest stack depth: 24272 bytes left [ 180.556077][ T594] [ 180.556230][ T594] ============================================ [ 180.556433][ T594] WARNING: possible recursive locking detected [ 180.556628][ T594] 6.13.0-rc5-virtme #1 Not tainted [ 180.556786][ T594] -------------------------------------------- [ 180.556973][ T594] ip/594 is trying to acquire lock: [ 180.557128][ T594] ffffffff985d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 180.557462][ T594] [ 180.557462][ T594] but task is already holding lock: [ 180.557693][ T594] ffffffff985d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 180.558035][ T594] [ 180.558035][ T594] other info that might help us debug this: [ 180.558278][ T594] Possible unsafe locking scenario: [ 180.558278][ T594] [ 180.558551][ T594] CPU0 [ 180.558701][ T594] ---- [ 180.558817][ T594] lock((netdev_chain).rwsem); [ 180.558998][ T594] lock((netdev_chain).rwsem); [ 180.559160][ T594] [ 180.559160][ T594] *** DEADLOCK *** [ 180.559160][ T594] [ 180.559382][ T594] May be due to missing lock nesting notation [ 180.559382][ T594] [ 180.559616][ T594] 2 locks held by ip/594: [ 180.559729][ T594] #0: ffffffff985e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 180.560019][ T594] #1: ffffffff985d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 180.560338][ T594] [ 180.560338][ T594] stack backtrace: [ 180.560551][ T594] CPU: 0 UID: 0 PID: 594 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 180.560791][ T594] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 180.560987][ T594] Call Trace: [ 180.561114][ T594] [ 180.561192][ T594] dump_stack_lvl+0x82/0xd0 [ 180.561360][ T594] print_deadlock_bug+0x40a/0x650 [ 180.561526][ T594] validate_chain+0x5bf/0xae0 [ 180.561687][ T594] ? __pfx_validate_chain+0x10/0x10 [ 180.561847][ T594] ? hlock_class+0x4e/0x130 [ 180.561993][ T594] ? mark_lock+0x38/0x3e0 [ 180.562108][ T594] __lock_acquire+0xb9a/0x1680 [ 180.562254][ T594] lock_acquire.part.0+0xeb/0x330 [ 180.562400][ T594] ? blocking_notifier_call_chain+0x50/0x90 [ 180.562598][ T594] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 180.562794][ T594] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 180.562959][ T594] ? trace_lock_acquire+0x14c/0x1f0 [ 180.563113][ T594] ? lock_acquire+0x32/0xc0 [ 180.563272][ T594] ? blocking_notifier_call_chain+0x50/0x90 [ 180.563453][ T594] down_read+0x9f/0x340 [ 180.563565][ T594] ? blocking_notifier_call_chain+0x50/0x90 [ 180.563748][ T594] ? __pfx_down_read+0x10/0x10 [ 180.563904][ T594] ? __lock_release+0x103/0x460 [ 180.564065][ T594] ? netconsole_netdev_event+0x2c1/0x620 [ 180.564224][ T594] ? __pfx___lock_release+0x10/0x10 [ 180.564373][ T594] blocking_notifier_call_chain+0x50/0x90 [ 180.564521][ T594] __netdev_upper_dev_unlink+0xd9/0x220 [ 180.564666][ T594] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 180.564851][ T594] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 180.565000][ T594] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 180.565187][ T594] ? rtnl_is_locked+0x15/0x20 [ 180.565337][ T594] netdev_upper_dev_unlink+0x71/0xa0 [ 180.565483][ T594] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 180.565665][ T594] ? netconsole_netdev_event+0x2c1/0x620 [ 180.565812][ T594] ? mutex_is_locked+0x1c/0x60 [ 180.565960][ T594] ? rtnl_is_locked+0x15/0x20 [ 180.566107][ T594] ? netdev_master_upper_dev_get+0x13/0x120 [ 180.566294][ T594] vrf_device_event+0x78/0xe0 [vrf] [ 180.566445][ T594] notifier_call_chain+0xcd/0x150 [ 180.566596][ T594] blocking_notifier_call_chain+0x66/0x90 [ 180.566743][ T594] unregister_netdevice_many_notify+0xa7b/0x1580 [ 180.566930][ T594] ? hlock_class+0x4e/0x130 [ 180.567075][ T594] ? mark_lock+0x38/0x3e0 [ 180.567189][ T594] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 180.567375][ T594] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 180.567569][ T594] ? kfree+0xf3/0x330 [ 180.567681][ T594] ? vlan_vid_del+0x310/0x5e0 [ 180.567839][ T594] ? vlan_vid_del+0x310/0x5e0 [ 180.568001][ T594] rtnl_dellink+0x348/0xa40 [ 180.568163][ T594] ? __pfx_rtnl_dellink+0x10/0x10 [ 180.568337][ T594] ? find_held_lock+0x2c/0x110 [ 180.568495][ T594] ? __lock_release+0x103/0x460 [ 180.568693][ T594] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 180.568865][ T594] ? __pfx___lock_release+0x10/0x10 [ 180.569028][ T594] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 180.569193][ T594] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 180.569369][ T594] ? __pfx_rtnl_dellink+0x10/0x10 [ 180.569520][ T594] rtnetlink_rcv_msg+0x712/0xc10 [ 180.569678][ T594] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 180.569825][ T594] ? hlock_class+0x4e/0x130 [ 180.569975][ T594] ? mark_lock+0x38/0x3e0 [ 180.570090][ T594] ? __lock_acquire+0xb9a/0x1680 [ 180.570237][ T594] netlink_rcv_skb+0x130/0x360 [ 180.570385][ T594] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 180.570542][ T594] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 180.570708][ T594] ? netlink_deliver_tap+0x13e/0x340 [ 180.570866][ T594] ? netlink_deliver_tap+0xc3/0x340 [ 180.571019][ T594] netlink_unicast+0x44b/0x710 [ 180.571173][ T594] ? __pfx_netlink_unicast+0x10/0x10 [ 180.571320][ T594] ? find_held_lock+0x2c/0x110 [ 180.571482][ T594] netlink_sendmsg+0x723/0xbe0 [ 180.571627][ T594] ? __pfx_netlink_sendmsg+0x10/0x10 [ 180.571789][ T594] ____sys_sendmsg+0x7ac/0xa10 [ 180.571956][ T594] ? __pfx_____sys_sendmsg+0x10/0x10 [ 180.572118][ T594] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 180.572312][ T594] ___sys_sendmsg+0xee/0x170 [ 180.572470][ T594] ? __pfx____sys_sendmsg+0x10/0x10 [ 180.572618][ T594] ? kasan_save_stack+0x34/0x50 [ 180.572766][ T594] ? kasan_save_stack+0x24/0x50 [ 180.572922][ T594] ? __kasan_record_aux_stack+0x8e/0xa0 [ 180.573086][ T594] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 180.573271][ T594] ? __x64_sys_close+0x7c/0xd0 [ 180.573419][ T594] ? do_syscall_64+0xc1/0x1d0 [ 180.573567][ T594] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 180.573755][ T594] ? __lock_acquire+0xb9a/0x1680 [ 180.573918][ T594] ? find_held_lock+0x2c/0x110 [ 180.574078][ T594] ? __lock_release+0x103/0x460 [ 180.574236][ T594] ? __virt_addr_valid+0x22b/0x430 [ 180.574388][ T594] ? __pfx___lock_release+0x10/0x10 [ 180.574536][ T594] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 180.574683][ T594] __sys_sendmsg+0x109/0x1a0 [ 180.574851][ T594] ? __pfx___sys_sendmsg+0x10/0x10 [ 180.574999][ T594] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 180.575195][ T594] do_syscall_64+0xc1/0x1d0 [ 180.575367][ T594] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 180.575556][ T594] RIP: 0033:0x7f525b5e39a7 [ 180.575727][ T594] 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 [ 180.576279][ T594] RSP: 002b:00007fff58912018 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 180.576528][ T594] RAX: ffffffffffffffda RBX: 00007fff58912740 RCX: 00007f525b5e39a7 [ 180.576760][ T594] RDX: 0000000000000000 RSI: 00007fff58912080 RDI: 0000000000000005 [ 180.577001][ T594] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 180.577221][ T594] R10: 00007f525b4a1ef8 R11: 0000000000000246 R12: 0000000000000002 [ 180.577466][ T594] R13: 000000006778feb9 R14: 0000000000498600 R15: 0000000000000000 [ 180.577688][ T594] [ 180.597199][ T594] ip (594) used greatest stack depth: 23376 bytes left