[  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 '10.128.0.246' (ECDSA) to the list of known hosts.
syzkaller login: [   55.177480][   T25] audit: type=1400 audit(1599366823.222:8): avc:  denied  { execmem } for  pid=6486 comm="syz-executor721" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
executing program
executing program
[   68.846253][ T6486] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff88811bd72400 (size 224):
  comm "syz-executor721", pid 6487, jiffies 4294943493 (age 12.630s)
  hex dump (first 32 bytes):
    a0 c4 ef 2a 81 88 ff ff a0 c4 ef 2a 81 88 ff ff  ...*.......*....
    00 40 60 1a 81 88 ff ff 00 00 00 00 00 00 00 00  .@`.............
  backtrace:
    [<00000000d6c25eb7>] __build_skb+0x1f/0x100
    [<0000000043d67111>] __napi_alloc_skb+0xe5/0x140
    [<00000000b2622b88>] napi_get_frags+0x3a/0x70
    [<0000000000c0411d>] tun_get_user+0xa43/0x1660
    [<000000006dbd9b36>] tun_chr_write_iter+0x66/0xa0
    [<00000000d12306c9>] do_iter_readv_writev+0x207/0x2d0
    [<0000000022557d6f>] do_iter_write+0xac/0x230
    [<000000008de23adb>] vfs_writev+0xc1/0x120
    [<0000000050ad4278>] do_writev+0x83/0x170
    [<00000000bafa8c00>] do_syscall_64+0x2d/0x70
    [<00000000f38c4636>] entry_SYSCALL_64_after_hwframe+0x44/0xa9