[ 14.880074][ T314] 8021q: 802.1Q VLAN Support v1.8 [ 15.285776][ T319] gre: GRE over IPv4 demultiplexor driver [ 15.299678][ T319] ip_gre: GRE over IPv4 tunneling driver [ 33.040613][ T418] [ 33.040775][ T418] ============================================ [ 33.040970][ T418] WARNING: possible recursive locking detected [ 33.041215][ T418] 6.13.0-rc5-virtme #1 Not tainted [ 33.041407][ T418] -------------------------------------------- [ 33.041632][ T418] ip/418 is trying to acquire lock: [ 33.041821][ T418] ffffffffb87d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.042195][ T418] [ 33.042195][ T418] but task is already holding lock: [ 33.042465][ T418] ffffffffb87d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.042825][ T418] [ 33.042825][ T418] other info that might help us debug this: [ 33.043096][ T418] Possible unsafe locking scenario: [ 33.043096][ T418] [ 33.043365][ T418] CPU0 [ 33.043504][ T418] ---- [ 33.043640][ T418] lock((netdev_chain).rwsem); [ 33.043831][ T418] lock((netdev_chain).rwsem); [ 33.044014][ T418] [ 33.044014][ T418] *** DEADLOCK *** [ 33.044014][ T418] [ 33.044285][ T418] May be due to missing lock nesting notation [ 33.044285][ T418] [ 33.044555][ T418] 2 locks held by ip/418: [ 33.044696][ T418] #0: ffffffffb87e7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 33.045031][ T418] #1: ffffffffb87d6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 33.045409][ T418] [ 33.045409][ T418] stack backtrace: [ 33.045637][ T418] CPU: 2 UID: 0 PID: 418 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 33.045910][ T418] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 33.046146][ T418] Call Trace: [ 33.046289][ T418] [ 33.046384][ T418] dump_stack_lvl+0x82/0xd0 [ 33.046581][ T418] print_deadlock_bug+0x40a/0x650 [ 33.046772][ T418] validate_chain+0x5bf/0xae0 [ 33.046957][ T418] ? __pfx_validate_chain+0x10/0x10 [ 33.047179][ T418] ? hlock_class+0x4e/0x130 [ 33.047362][ T418] ? mark_lock+0x38/0x3e0 [ 33.047502][ T418] __lock_acquire+0xb9a/0x1680 [ 33.047687][ T418] lock_acquire.part.0+0xeb/0x330 [ 33.047882][ T418] ? blocking_notifier_call_chain+0x50/0x90 [ 33.048109][ T418] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 33.048337][ T418] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.048517][ T418] ? trace_lock_acquire+0x14c/0x1f0 [ 33.048704][ T418] ? lock_acquire+0x32/0xc0 [ 33.048886][ T418] ? blocking_notifier_call_chain+0x50/0x90 [ 33.049114][ T418] down_read+0x9f/0x340 [ 33.049253][ T418] ? blocking_notifier_call_chain+0x50/0x90 [ 33.049477][ T418] ? __pfx_down_read+0x10/0x10 [ 33.049657][ T418] ? __lock_release+0x103/0x460 [ 33.049838][ T418] ? netconsole_netdev_event+0x2c1/0x620 [ 33.050024][ T418] ? __pfx___lock_release+0x10/0x10 [ 33.050205][ T418] blocking_notifier_call_chain+0x50/0x90 [ 33.050385][ T418] __netdev_upper_dev_unlink+0xd9/0x220 [ 33.050566][ T418] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 33.050792][ T418] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 33.050971][ T418] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 33.051203][ T418] ? rtnl_is_locked+0x15/0x20 [ 33.051386][ T418] netdev_upper_dev_unlink+0x71/0xa0 [ 33.051567][ T418] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 33.051790][ T418] ? netconsole_netdev_event+0x2c1/0x620 [ 33.051973][ T418] ? mutex_is_locked+0x1c/0x60 [ 33.052156][ T418] ? rtnl_is_locked+0x15/0x20 [ 33.052338][ T418] ? netdev_master_upper_dev_get+0x13/0x120 [ 33.052568][ T418] vrf_device_event+0x78/0xe0 [vrf] [ 33.052757][ T418] notifier_call_chain+0xcd/0x150 [ 33.052940][ T418] blocking_notifier_call_chain+0x66/0x90 [ 33.053122][ T418] unregister_netdevice_many_notify+0xa7b/0x1580 [ 33.053347][ T418] ? __lock_release+0x103/0x460 [ 33.053530][ T418] ? __pfx___lock_release+0x10/0x10 [ 33.053711][ T418] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 33.053941][ T418] ? hlock_class+0x4e/0x130 [ 33.054128][ T418] ? mark_held_locks+0x9e/0xe0 [ 33.054313][ T418] ? __pfx_vlan_info_rcu_free+0x10/0x10 [ 33.054497][ T418] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 33.054725][ T418] rtnl_dellink+0x348/0xa40 [ 33.054909][ T418] ? __pfx_rtnl_dellink+0x10/0x10 [ 33.055104][ T418] ? find_held_lock+0x2c/0x110 [ 33.055294][ T418] ? __lock_release+0x103/0x460 [ 33.055474][ T418] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 33.055656][ T418] ? __pfx___lock_release+0x10/0x10 [ 33.055836][ T418] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.056018][ T418] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 33.056197][ T418] ? __pfx_rtnl_dellink+0x10/0x10 [ 33.056378][ T418] rtnetlink_rcv_msg+0x712/0xc10 [ 33.056564][ T418] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 33.056746][ T418] ? hlock_class+0x4e/0x130 [ 33.056924][ T418] ? mark_lock+0x38/0x3e0 [ 33.057074][ T418] ? __lock_acquire+0xb9a/0x1680 [ 33.057257][ T418] netlink_rcv_skb+0x130/0x360 [ 33.057440][ T418] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 33.057620][ T418] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 33.057811][ T418] ? netlink_deliver_tap+0x13e/0x340 [ 33.057994][ T418] ? netlink_deliver_tap+0xc3/0x340 [ 33.058176][ T418] netlink_unicast+0x44b/0x710 [ 33.058358][ T418] ? __pfx_netlink_unicast+0x10/0x10 [ 33.058539][ T418] ? find_held_lock+0x2c/0x110 [ 33.058722][ T418] netlink_sendmsg+0x723/0xbe0 [ 33.058902][ T418] ? __pfx_netlink_sendmsg+0x10/0x10 [ 33.059090][ T418] ____sys_sendmsg+0x7ac/0xa10 [ 33.059277][ T418] ? __pfx_____sys_sendmsg+0x10/0x10 [ 33.059456][ T418] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 33.059685][ T418] ___sys_sendmsg+0xee/0x170 [ 33.059869][ T418] ? __pfx____sys_sendmsg+0x10/0x10 [ 33.060053][ T418] ? kasan_save_stack+0x34/0x50 [ 33.060234][ T418] ? kasan_save_stack+0x24/0x50 [ 33.060412][ T418] ? __kasan_record_aux_stack+0x8e/0xa0 [ 33.060600][ T418] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 33.060828][ T418] ? __x64_sys_close+0x7c/0xd0 [ 33.061013][ T418] ? do_syscall_64+0xc1/0x1d0 [ 33.061195][ T418] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 33.061422][ T418] ? __lock_acquire+0xb9a/0x1680 [ 33.061608][ T418] ? find_held_lock+0x2c/0x110 [ 33.061789][ T418] ? __lock_release+0x103/0x460 [ 33.061976][ T418] ? __virt_addr_valid+0x22b/0x430 [ 33.062159][ T418] ? __pfx___lock_release+0x10/0x10 [ 33.062339][ T418] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 33.062521][ T418] __sys_sendmsg+0x109/0x1a0 [ 33.062702][ T418] ? __pfx___sys_sendmsg+0x10/0x10 [ 33.062883][ T418] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 33.063114][ T418] do_syscall_64+0xc1/0x1d0 [ 33.063301][ T418] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 33.063526][ T418] RIP: 0033:0x7fd31fdb29a7 [ 33.063718][ T418] 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 [ 33.064354][ T418] RSP: 002b:00007ffe6caf3d78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.064635][ T418] RAX: ffffffffffffffda RBX: 00007ffe6caf44a0 RCX: 00007fd31fdb29a7 [ 33.064907][ T418] RDX: 0000000000000000 RSI: 00007ffe6caf3de0 RDI: 0000000000000005 [ 33.065179][ T418] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 33.065448][ T418] R10: 00007fd31fc70ef8 R11: 0000000000000246 R12: 0000000000000002 [ 33.065725][ T418] R13: 0000000067792bd2 R14: 0000000000498600 R15: 0000000000000000 [ 33.065998][ T418] [ 33.092414][ T418] ip (418) used greatest stack depth: 23896 bytes left