[Bug 1000498] Re: fmod() incorrectly returns NaN for (some?) denormalized inputs

[Launchpad Bug Tracker]

This bug was fixed in the package eglibc - 2.15-0ubuntu20

---------------
eglibc (2.15-0ubuntu20) quantal; urgency=low

  * Backport fixes for dbl-64 and ldbl-128 issues (LP: #1000498)
  * Backport another FMA support patch from glibc master branch.

eglibc (2.15-0ubuntu19) quantal-proposed; urgency=low

  * SECURITY UPDATE: stack buffer overflow in vfprintf handling
    (LP: #1031301)
    - debian/patches/any/CVE-2012-3406.patch: switch to malloc when
      array grows too large to handle via alloca extension
    - CVE-2012-3406
  * SECURITY UPDATE: stdlib strtod integer/buffer overflows
    - debian/patches/any/CVE-2012-3480.patch: rearrange calculations
      and modify types to void integer overflows
    - CVE-2012-3480
 -- Adam Conrad <adconrad at ubuntu.com>   Wed, 03 Oct 2012 15:58:02 -0600

** Changed in: eglibc (Ubuntu Quantal)
       Status: Fix Committed => Fix Released

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2012-3406

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2012-3480

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https://bugs.launchpad.net/bugs/1000498

Title:
  fmod() incorrectly returns NaN for (some?) denormalized inputs

Status in Embedded GLIBC:
  Fix Released
Status in “eglibc” package in Ubuntu:
  Fix Released
Status in “eglibc” source package in Precise:
  In Progress
Status in “eglibc” source package in Quantal:
  Fix Released

Bug description:
  [Impact]
  When using fmod, some inputs will cause incorrect results.

  [Fix]
  An upstream eglibc patch (c5bfe3d5ba29d36563f1e4bd4f8d7336093ee6fc) fixes this particular issue.

  [Test Case]
  See comment https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/1000498/comments/1 for a C program that exhibits this issue.

  [Regression Potential]
  This adds the fixes for fmod and adds the appropriate test cases in eglibc.

  [Original Report]
  See http://sourceware.org/bugzilla/show_bug.cgi?id=14048.

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