[PATCH 0/1] [SRU f/linux-oem-5.6] CVE-2020-27830

[Tim Gardner]

[Impact]
NULL-ptr deref in the spk_ttyio_receive_buf2() function in spk_ttyio.c

>From the Ubuntu security team:
Shisong Qin and Bodong Zhao discovered that Speakup screen reader driver in the
Linux kernel did not correctly handle setting line discipline in some situations.
A local attacker could use this to cause a denial of service (system crash).

[Test Case]
None

[Potential regression]
This patch has been released in linux-4.14.y, linux-4.19.y, linux-5.4.y, and linux-5.9.y