[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.87' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   87.584181][ T8439] syz-executor221 uses obsolete (PF_INET,SOCK_PACKET)
[   93.527888][ T8438] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff888110241c00 (size 232):
  comm "syz-executor221", pid 8439, jiffies 4294946018 (age 7.980s)
  hex dump (first 32 bytes):
    a0 c4 3c 0f 81 88 ff ff a0 c4 3c 0f 81 88 ff ff  ..<.......<.....
    00 00 9f 0e 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000fa1d5243>] __alloc_skb+0x6d/0x280
    [<00000000a72b5a79>] __napi_alloc_skb+0x67/0x170
    [<00000000843f8603>] napi_get_frags+0x3c/0x80
    [<00000000233bc753>] tun_get_user+0xfda/0x1b40
    [<00000000bbe25bdd>] tun_chr_write_iter+0x84/0xe0
    [<000000001fa3d710>] new_sync_write+0x1d7/0x2b0
    [<00000000aa607bc2>] vfs_write+0x34c/0x400
    [<0000000021b53f9a>] ksys_write+0x9d/0x160
    [<000000003785fdca>] do_syscall_64+0x2d/0x70
    [<00000000fbecdad1>] entry_SYSCALL_64_after_hwframe+0x44/0xa9