[   20.340516][ T3637] 8021q: adding VLAN 0 to HW filter on device bond0
[   20.345809][ T3637] eql: remember to turn off Van-Jacobson compression on your slave devices
[   20.390607][  T153] gvnic 0000:00:00.0 enp0s0: Device link is up.
[   20.394392][   T21] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready
Starting sshd: OK

syzkaller
Warning: Permanently added '10.128.1.62' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   48.442967][ T4051] 
[   48.443595][ T4051] ============================================
[   48.445124][ T4051] WARNING: possible recursive locking detected
[   48.446696][ T4051] 5.15.98-syzkaller #0 Not tainted
[   48.448002][ T4051] --------------------------------------------
[   48.449541][ T4051] syz-executor236/4051 is trying to acquire lock:
[   48.451145][ T4051] ffff0000dd063120 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: l2tp_tunnel_register+0x888/0x1974
[   48.453591][ T4051] 
[   48.453591][ T4051] but task is already holding lock:
[   48.455315][ T4051] ffff0000dd062120 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: pppol2tp_connect+0x53c/0x1348
[   48.457658][ T4051] 
[   48.457658][ T4051] other info that might help us debug this:
[   48.459726][ T4051]  Possible unsafe locking scenario:
[   48.459726][ T4051] 
[   48.461639][ T4051]        CPU0
[   48.462453][ T4051]        ----
[   48.463221][ T4051]   lock(sk_lock-AF_PPPOX);
[   48.464306][ T4051]   lock(sk_lock-AF_PPPOX);
[   48.465464][ T4051] 
[   48.465464][ T4051]  *** DEADLOCK ***
[   48.465464][ T4051] 
[   48.467443][ T4051]  May be due to missing lock nesting notation
[   48.467443][ T4051] 
[   48.469521][ T4051] 1 lock held by syz-executor236/4051:
[   48.470917][ T4051]  #0: ffff0000dd062120 (sk_lock-AF_PPPOX){+.+.}-{0:0}, at: pppol2tp_connect+0x53c/0x1348
[   48.473399][ T4051] 
[   48.473399][ T4051] stack backtrace:
[   48.474893][ T4051] CPU: 0 PID: 4051 Comm: syz-executor236 Not tainted 5.15.98-syzkaller #0
[   48.476993][ T4051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
[   48.479604][ T4051] Call trace:
[   48.480431][ T4051]  dump_backtrace+0x0/0x530
[   48.481462][ T4051]  show_stack+0x2c/0x3c
[   48.482569][ T4051]  dump_stack_lvl+0x108/0x170
[   48.483709][ T4051]  dump_stack+0x1c/0x58
[   48.484696][ T4051]  __lock_acquire+0x62b4/0x7620
[   48.485950][ T4051]  lock_acquire+0x2b8/0x894
[   48.487088][ T4051]  lock_sock_nested+0xec/0x1ec
[   48.488361][ T4051]  l2tp_tunnel_register+0x888/0x1974
[   48.489674][ T4051]  pppol2tp_connect+0x944/0x1348
[   48.490901][ T4051]  __sys_connect+0x268/0x290
[   48.492067][ T4051]  __arm64_sys_connect+0x7c/0x94
[   48.493301][ T4051]  invoke_syscall+0x98/0x2b8
[   48.494438][ T4051]  el0_svc_common+0x138/0x258
[   48.495606][ T4051]  do_el0_svc+0x58/0x14c
[   48.496684][ T4051]  el0_svc+0x7c/0x1f0
[   48.497680][ T4051]  el0t_64_sync_handler+0x84/0xe4
[   48.499029][ T4051]  el0t_64_sync+0x1a0/0x1a4