[libav-bugs] [Bug 513] New: get_pixels_altivec causes FATE failures due to over-reading

bugzilla-daemon at aruru.libav.org bugzilla-daemon at aruru.libav.org
Fri May 10 17:15:09 CEST 2013


https://bugzilla.libav.org/show_bug.cgi?id=513

           Summary: get_pixels_altivec causes FATE failures due to
                    over-reading
           Product: Libav
           Version: git HEAD
          Platform: PPC
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: Normal
         Component: libavcodec
        AssignedTo: bugzilla at libav.org
        ReportedBy: gseanmcg at gmail.com


When building with AltiVec accelerations enabled, valgrind reports test
failures from the following tests:

vsynth1-asv1
vsynth1-asv2
vsynth1-dnxhd-720p
vsynth1-dnxhd-720p-rd
vsynth2-asv1
vsynth2-asv2
vsynth2-dnxhd-720p
vsynth2-dnxhd-720p-rd

This can be tracked down to an over-read get_pixels_altivec from
libavcodec/ppc/dsputil_altivec.c

Test failures are reproducable on a 64-way POWER7 running RedHat as well as a
uniprocessor G4 Mac Mini running current Gentoo.

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