[Bug libc/13336] New: Add missing buffer termination in readlinkat() unit test

["thomas.jarosch at intra2net dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=13336

             Bug #: 13336
           Summary: Add missing buffer termination in readlinkat() unit
                    test
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: drepper.fsp@gmail.com
        ReportedBy: thomas.jarosch@intra2net.com
    Classification: Unclassified


Created attachment 6028
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6028
Patch to fix the issue

>From the patch:

Add missing buffer termination in readlinkat() unit test

readlinkat() never zero terminates the buffer.

Also make sure we don't overflow the buffer if readlinkat() returns
the full size of the buffer by reducing the supplied size.

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