CVE Request: Linux kernel: s390: crash due to linkage stack instruction

[P J P <ppandit () redhat com>]

   Hello,

Linux kernel built for the s390 architecture(CONFIG_S390) is vulnerable to a 
crash due to low-address protection exception. It occurs when an application 
uses a linkage stack instruction.

An unprivileged user/application could use this flaw to crash the system 
resulting in DoS.

Upstream fix:
-------------
  -> https://git.kernel.org/linus/8d7f6690cedb83456edd41c9bd583783f0703bf0

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1067558


Thank you.
--
Prasad J Pandit / Red Hat Security Response Team