Description of problem:
Structure sockaddr_tipc is copied to userland with padding bytes after "id" field in union field "name" unitialized. It leads to leaking of contents of kernel stack memory. We have to initialize them to zero.
Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.
This issue did not affect the version of Linux kernel as shipped with Red Hat
Enterprise Linux 3, 4 and Red Hat Enterprise MRG as they did not include
support for Transparent Inter-Process Communication Protocol (TIPC). A future
kernel update in Red Hat Enterprise Linux 5 may address this flaw.
This issue has been addressed in following products:
Red Hat Enterprise Linux 5
Via RHSA-2011:0017 https://rhn.redhat.com/errata/RHSA-2011-0017.html