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avcodec/jpeg2000dec: Check tile offsets 

Fixes: runtime error: signed integer overflow: 4096 - -2147483648 cannot be represented in type 'int'

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-24 19:40:42 +02:00
parent ca616b0f72
commit 89325417e7
1 changed files with 8 additions and 0 deletions
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8
libavcodec/jpeg2000dec.c
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@ -298,6 +298,14 @@ static int get_siz(Jpeg2000DecoderContext *s)
return AVERROR_PATCHWELCOME;
}
if (s->tile_offset_x < 0 || s->tile_offset_y < 0 ||
s->image_offset_x < s->tile_offset_x ||
s->image_offset_y < s->tile_offset_y) {
av_log(s->avctx, AV_LOG_ERROR, "Tile offsets are invalid\n",
s->ncomponents);
return AVERROR_INVALIDDATA;
}
s->ncomponents = ncomponents;
if (s->tile_width <= 0 || s->tile_height <= 0) {