[PATCH 0/4][T] CVE-2018-7566, CVE-2018-1000004: Multiple issues in ALSA

[Tyler Hicks]

https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-1000004.html

 In the Linux kernel 4.12, 3.10, 2.6 and possibly earlier versions a race
 condition vulnerability exists in the sound system, this can lead to a
 deadlock and denial of service condition.

https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-7566.html

 The Linux kernel 4.15 has a Buffer Overflow via an
 SNDRV_SEQ_IOCTL_SET_CLIENT_POOL ioctl write operation to /dev/snd/seq
 by a local user.

I've tested these changes by ensuring that audio still works in a
desktop VM. These issues only affect Trusty.

Tyler