[FFmpeg-trac] #3413(undetermined:open): invalid read in swscale when converting from rgb24 to yuv420p

[FFmpeg]

#3413: invalid read in swscale when converting from rgb24 to yuv420p
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             Reporter:  ubitux       |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
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Comment (by ubitux):

 The valgrind commands don't triggers the issue anymore. OTOH the original
 code still does. The following hack prevents the valgrind issue:

 {{{
 --- a/libavcodec/avpicture.c
 +++ b/libavcodec/avpicture.c
 @@ -55,7 +55,7 @@ int avpicture_alloc(AVPicture *picture,
                      enum AVPixelFormat pix_fmt, int width, int height)
  {
      int ret = av_image_alloc(picture->data, picture->linesize,
 -                             width, height, pix_fmt, 1);
 +                             width, height, pix_fmt, 32);
      if (ret < 0) {
          memset(picture, 0, sizeof(AVPicture));
          return ret;
 }}}

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Ticket URL: <https://trac.ffmpeg.org/ticket/3413#comment:3>
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