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dds: validate source buffer size before copying 

If it is too small av_image_copy_plane segfaults.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-11-11 01:14:57 +01:00 committed by Vittorio Giovara
parent b5f963bfec
commit e6459c655e
1 changed files with 6 additions and 0 deletions
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6
libavcodec/dds.c
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@ -668,6 +668,12 @@ static int dds_decode(AVCodecContext *avctx, void *data,
frame->palette_has_changed = 1;
}
if (bytestream2_get_bytes_left(gbc) < frame->height * linesize) {
av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
bytestream2_get_bytes_left(gbc), frame->height * linesize);
return AVERROR_INVALIDDATA;
}
av_image_copy_plane(frame->data[0], frame->linesize[0],
gbc->buffer, linesize,
linesize, frame->height);