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avformat/mov: add more sanity checks when reading clap boxes

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If the apperture window is bigger than the canvas, then the clap box is invalid
and there's no point calculating cropping values.

Fixes: libavformat/mov.c:1295:14: runtime error: -256 is outside the range of representable values of type 'unsigned long'

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2025-06-04 14:02:15 -03:00
parent dbe94e1110
commit f789d60e11
1 changed files with 5 additions and 0 deletions
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5
libavformat/mov.c
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@ -1277,6 +1277,11 @@ static int mov_read_clap(MOVContext *c, AVIOContext *pb, MOVAtom atom)
err = AVERROR_INVALIDDATA;
goto fail;
}
if ((av_cmp_q((AVRational) { width, 1 }, aperture_width) < 0) ||
(av_cmp_q((AVRational) { height, 1 }, aperture_height) < 0)) {
err = AVERROR_INVALIDDATA;
goto fail;
}
av_log(c->fc, AV_LOG_TRACE, "clap: apertureWidth %d/%d, apertureHeight %d/%d "
"horizOff %d/%d vertOff %d/%d\n",
aperture_width.num, aperture_width.den, aperture_height.num, aperture_height.den,