[FFmpeg-trac] #5231(avcodec:closed): Crashes in ff_deblock_v_luma_8_sse2

FFmpeg trac at avcodec.org
Thu Jun 23 18:24:44 CEST 2016

#5231: Crashes in ff_deblock_v_luma_8_sse2
             Reporter:  mi           |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  important    |                Component:  avcodec
              Version:  unspecified  |               Resolution:
             Keywords:  h264 crash   |  needs_more_info
  SIGSEGV                            |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by coypu):

 Hi, for context on a working fix, -mstackrealign on GCC
            Realign the stack at entry.  On the Intel x86, the
            option generates an alternate prologue and epilogue that
            the run-time stack if necessary.  This supports mixing legacy
            that keep 4-byte stack alignment with modern codes that keep
            16-byte stack alignment for SSE compatibility.  See also the
            attribute "force_align_arg_pointer", applicable to individual

Ticket URL: <https://trac.ffmpeg.org/ticket/5231#comment:17>
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