[Bug libc/13763] New: bindresvport() function is multithread-unsafe

["penght at cn dot fujitsu.com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=13763

             Bug #: 13763
           Summary: bindresvport() function is multithread-unsafe
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: unassigned@sourceware.org
        ReportedBy: penght@cn.fujitsu.com
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


Created attachment 6250
  --> http://sourceware.org/bugzilla/attachment.cgi?id=6250
The Patch can make bindresvport() function to multithread-safe

bindresvport() uses two static variables port and startport which are not
protected. It is not safe when in multithread circumstance.

bindresvport() select a port number from the range 512 to 1023, when in
multithread circumstance, the port may be 1024. So the static variables will be
protected.

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