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dds: validate source buffer size before copying

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If it is too small av_image_copy_plane segfaults.

Reviewed-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 1675809d2df76b1a185c78ca0a7a1c8ccb493167)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-11-11 00:05:02 +01:00
parent df31acda64
commit a8513826dd
1 changed files with 6 additions and 0 deletions
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6
libavcodec/dds.c
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@ -666,6 +666,12 @@ 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);