[Bug nptl/34543] New: PI mutex timed lock returns EINVAL for negative seconds

https://sourceware.org/bugzilla/show_bug.cgi?id=34543

            Bug ID: 34543
           Summary: PI mutex timed lock returns EINVAL for negative
                    seconds
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P3
         Component: nptl
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

We treat negative seconds as valid in the non-PI case:

          /* Work around the fact that the kernel rejects negative timeout
             values despite them being valid.  */
          if (__glibc_unlikely (abstime->tv_sec < 0))
            return ETIMEDOUT;

This is missing from the PI case, so we pass the kernel-provided EINVAL to the
application.

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