[  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 '10.128.0.151' (ECDSA) to the list of known hosts.
syzkaller login: [   52.468944][   T24] audit: type=1400 audit(1600768637.805:8): avc:  denied  { execmem } for  pid=6486 comm="syz-executor248" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
executing program
executing program
[   66.203189][ T6486] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff88811a757300 (size 224):
  comm "syz-executor248", pid 6487, jiffies 4294943252 (age 14.030s)
  hex dump (first 32 bytes):
    a0 9c 69 1c 81 88 ff ff a0 9c 69 1c 81 88 ff ff  ..i.......i.....
    00 c0 5d 18 81 88 ff ff 00 00 00 00 00 00 00 00  ..].............
  backtrace:
    [<00000000746234dd>] __build_skb+0x1f/0x100
    [<000000006aebf488>] __napi_alloc_skb+0xe5/0x140
    [<000000005ffed00f>] napi_get_frags+0x3a/0x70
    [<000000000f7b834c>] tun_get_user+0xa43/0x1660
    [<000000006b87a140>] tun_chr_write_iter+0x66/0xa0
    [<00000000d8893d53>] new_sync_write+0x173/0x210
    [<00000000e5517826>] __kernel_write+0x140/0x1f0
    [<00000000767c0fd4>] write_pipe_buf+0x61/0x80
    [<00000000b4691bac>] __splice_from_pipe+0x154/0x290
    [<000000004a5906c5>] do_splice+0x772/0x8d0
    [<0000000066fdff60>] __x64_sys_splice+0xaa/0x110
    [<000000000416058b>] do_syscall_64+0x2d/0x70
    [<00000000595bf1ea>] entry_SYSCALL_64_after_hwframe+0x44/0xa9