[Bug network/16574] New: Memory leak in _nss_dns_gethostbyname4_r with big DNS answer

["schwab at linux-m68k dot org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=16574

            Bug ID: 16574
           Summary: Memory leak in _nss_dns_gethostbyname4_r with big DNS
                    answer
           Product: glibc
           Version: 2.11
            Status: NEW
          Severity: normal
          Priority: P2
         Component: network
          Assignee: unassigned at sourceware dot org
          Reporter: schwab@linux-m68k.org

When resolving both IPv4 and IPv6 and the answers from the DNS server are too
big to fit together in the supplied buffer then a new buffer for the second
answer is allocated by send_vc / send_dg, but _nss_dns_gethostbyname4_r fails
to deallocate it.  This is the only place where the resolver functions are
called in such a way that they may work with two buffers.

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