[ 34.194144][ T606] gre: GRE over IPv4 demultiplexor driver [ 34.255451][ T606] ip6_gre: GRE over IPv6 tunneling driver [ 35.832538][ T627] 8021q: 802.1Q VLAN Support v1.8 [ 190.036079][ T873] [ 190.036232][ T873] ============================================ [ 190.036423][ T873] WARNING: possible recursive locking detected [ 190.036606][ T873] 6.13.0-rc5-virtme #1 Not tainted [ 190.036757][ T873] -------------------------------------------- [ 190.036942][ T873] ip/873 is trying to acquire lock: [ 190.037125][ T873] ffffffffa5bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 190.037436][ T873] [ 190.037436][ T873] but task is already holding lock: [ 190.037672][ T873] ffffffffa5bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 190.037972][ T873] [ 190.037972][ T873] other info that might help us debug this: [ 190.038182][ T873] Possible unsafe locking scenario: [ 190.038182][ T873] [ 190.038392][ T873] CPU0 [ 190.038515][ T873] ---- [ 190.038624][ T873] lock((netdev_chain).rwsem); [ 190.038774][ T873] lock((netdev_chain).rwsem); [ 190.038918][ T873] [ 190.038918][ T873] *** DEADLOCK *** [ 190.038918][ T873] [ 190.039146][ T873] May be due to missing lock nesting notation [ 190.039146][ T873] [ 190.039357][ T873] 2 locks held by ip/873: [ 190.039468][ T873] #0: ffffffffa5be7a48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink+0x228/0xa40 [ 190.039766][ T873] #1: ffffffffa5bd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 190.040076][ T873] [ 190.040076][ T873] stack backtrace: [ 190.040255][ T873] CPU: 0 UID: 0 PID: 873 Comm: ip Not tainted 6.13.0-rc5-virtme #1 [ 190.040474][ T873] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 190.040666][ T873] Call Trace: [ 190.040785][ T873] [ 190.040861][ T873] dump_stack_lvl+0x82/0xd0 [ 190.041014][ T873] print_deadlock_bug+0x40a/0x650 [ 190.041161][ T873] validate_chain+0x5bf/0xae0 [ 190.041310][ T873] ? __pfx_validate_chain+0x10/0x10 [ 190.041457][ T873] ? hlock_class+0x4e/0x130 [ 190.041609][ T873] ? mark_lock+0x38/0x3e0 [ 190.041721][ T873] __lock_acquire+0xb9a/0x1680 [ 190.041869][ T873] lock_acquire.part.0+0xeb/0x330 [ 190.042031][ T873] ? blocking_notifier_call_chain+0x50/0x90 [ 190.042214][ T873] ? netconsole_process_cleanups_core+0x2e/0x3d0 [ 190.042399][ T873] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 190.042545][ T873] ? trace_lock_acquire+0x14c/0x1f0 [ 190.042707][ T873] ? lock_acquire+0x32/0xc0 [ 190.042852][ T873] ? blocking_notifier_call_chain+0x50/0x90 [ 190.043039][ T873] down_read+0x9f/0x340 [ 190.043149][ T873] ? blocking_notifier_call_chain+0x50/0x90 [ 190.043334][ T873] ? __pfx_down_read+0x10/0x10 [ 190.043481][ T873] ? __lock_release+0x103/0x460 [ 190.043627][ T873] ? netconsole_netdev_event+0x2c1/0x620 [ 190.043774][ T873] ? __pfx___lock_release+0x10/0x10 [ 190.043922][ T873] blocking_notifier_call_chain+0x50/0x90 [ 190.044072][ T873] __netdev_upper_dev_unlink+0xd9/0x220 [ 190.044219][ T873] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 190.044402][ T873] ? __mutex_unlock_slowpath+0x14a/0x3d0 [ 190.044557][ T873] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 190.044738][ T873] ? rtnl_is_locked+0x15/0x20 [ 190.044890][ T873] netdev_upper_dev_unlink+0x71/0xa0 [ 190.045035][ T873] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 190.045223][ T873] ? netconsole_netdev_event+0x2c1/0x620 [ 190.045369][ T873] ? mutex_is_locked+0x1c/0x60 [ 190.045516][ T873] ? rtnl_is_locked+0x15/0x20 [ 190.045663][ T873] ? netdev_master_upper_dev_get+0x13/0x120 [ 190.045848][ T873] vrf_device_event+0x78/0xe0 [vrf] [ 190.045998][ T873] notifier_call_chain+0xcd/0x150 [ 190.046145][ T873] blocking_notifier_call_chain+0x66/0x90 [ 190.046296][ T873] unregister_netdevice_many_notify+0xa7b/0x1580 [ 190.046477][ T873] ? hlock_class+0x4e/0x130 [ 190.046622][ T873] ? mark_lock+0x38/0x3e0 [ 190.046733][ T873] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 190.046918][ T873] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 190.047102][ T873] ? kfree+0xf3/0x330 [ 190.047215][ T873] ? vlan_vid_del+0x310/0x5e0 [ 190.047367][ T873] ? vlan_vid_del+0x310/0x5e0 [ 190.047518][ T873] rtnl_dellink+0x348/0xa40 [ 190.047666][ T873] ? __pfx_rtnl_dellink+0x10/0x10 [ 190.047826][ T873] ? find_held_lock+0x2c/0x110 [ 190.047974][ T873] ? __lock_release+0x103/0x460 [ 190.048121][ T873] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 190.048267][ T873] ? __pfx___lock_release+0x10/0x10 [ 190.048417][ T873] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 190.048578][ T873] ? rtnetlink_rcv_msg+0x6ef/0xc10 [ 190.048725][ T873] ? __pfx_rtnl_dellink+0x10/0x10 [ 190.048872][ T873] rtnetlink_rcv_msg+0x712/0xc10 [ 190.049018][ T873] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 190.049163][ T873] ? hlock_class+0x4e/0x130 [ 190.049311][ T873] ? mark_lock+0x38/0x3e0 [ 190.049423][ T873] ? __lock_acquire+0xb9a/0x1680 [ 190.049573][ T873] netlink_rcv_skb+0x130/0x360 [ 190.049720][ T873] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 190.049869][ T873] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 190.050019][ T873] ? netlink_deliver_tap+0x13e/0x340 [ 190.050166][ T873] ? netlink_deliver_tap+0xc3/0x340 [ 190.050314][ T873] netlink_unicast+0x44b/0x710 [ 190.050460][ T873] ? __pfx_netlink_unicast+0x10/0x10 [ 190.050608][ T873] ? find_held_lock+0x2c/0x110 [ 190.050756][ T873] netlink_sendmsg+0x723/0xbe0 [ 190.050902][ T873] ? __pfx_netlink_sendmsg+0x10/0x10 [ 190.051053][ T873] ____sys_sendmsg+0x7ac/0xa10 [ 190.051199][ T873] ? __pfx_____sys_sendmsg+0x10/0x10 [ 190.051344][ T873] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 190.051528][ T873] ___sys_sendmsg+0xee/0x170 [ 190.051682][ T873] ? __pfx____sys_sendmsg+0x10/0x10 [ 190.051828][ T873] ? kasan_save_stack+0x34/0x50 [ 190.051974][ T873] ? kasan_save_stack+0x24/0x50 [ 190.052120][ T873] ? __kasan_record_aux_stack+0x8e/0xa0 [ 190.052269][ T873] ? __call_rcu_common.constprop.0+0xa1/0x4b0 [ 190.052455][ T873] ? __x64_sys_close+0x7c/0xd0 [ 190.052602][ T873] ? do_syscall_64+0xc1/0x1d0 [ 190.052752][ T873] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 190.052937][ T873] ? __lock_acquire+0xb9a/0x1680 [ 190.053084][ T873] ? find_held_lock+0x2c/0x110 [ 190.053231][ T873] ? __lock_release+0x103/0x460 [ 190.053378][ T873] ? __virt_addr_valid+0x22b/0x430 [ 190.053527][ T873] ? __pfx___lock_release+0x10/0x10 [ 190.053672][ T873] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 190.053821][ T873] __sys_sendmsg+0x109/0x1a0 [ 190.053967][ T873] ? __pfx___sys_sendmsg+0x10/0x10 [ 190.054113][ T873] ? __pfx_slab_free_after_rcu_debug+0x10/0x10 [ 190.054299][ T873] do_syscall_64+0xc1/0x1d0 [ 190.054443][ T873] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 190.054625][ T873] RIP: 0033:0x7fb87076a9a7 [ 190.054777][ T873] 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 [ 190.055299][ T873] RSP: 002b:00007ffc85de3d18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 190.055520][ T873] RAX: ffffffffffffffda RBX: 00007ffc85de4440 RCX: 00007fb87076a9a7 [ 190.055739][ T873] RDX: 0000000000000000 RSI: 00007ffc85de3d80 RDI: 0000000000000005 [ 190.055964][ T873] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 190.056182][ T873] R10: 00007fb870628ef8 R11: 0000000000000246 R12: 0000000000000002 [ 190.056402][ T873] R13: 0000000067792cb7 R14: 0000000000498600 R15: 0000000000000000 [ 190.056625][ T873]