On 4/25/19, Michael Niedermayer <[email protected]> wrote:
> Fixes: Timeout (22sec -> 11sec)
> Fixes:
> 13576/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_GDV_fuzzer-5681024577568768
>
> Found-by: continuous fuzzing process
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <[email protected]>
> ---
> libavcodec/gdv.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/libavcodec/gdv.c b/libavcodec/gdv.c
> index 183286b55f..0c16ad850a 100644
> --- a/libavcodec/gdv.c
> +++ b/libavcodec/gdv.c
> @@ -475,15 +475,14 @@ static int gdv_decode_frame(AVCodecContext *avctx,
> void *data,
> if (pal && pal_size == AVPALETTE_SIZE)
> memcpy(gdv->pal, pal, AVPALETTE_SIZE);
>
> + if (compression < 2 && bytestream2_get_bytes_left(gb) < 256*3)
> + return AVERROR_INVALIDDATA;
> rescale(gdv, gdv->frame, avctx->width, avctx->height,
> !!(flags & 0x10), !!(flags & 0x20));
> -
Unrelated.
> switch (compression) {
> case 1:
> memset(gdv->frame + PREAMBLE_SIZE, 0, gdv->frame_size -
> PREAMBLE_SIZE);
> case 0:
> - if (bytestream2_get_bytes_left(gb) < 256*3)
> - return AVERROR_INVALIDDATA;
> for (i = 0; i < 256; i++) {
> unsigned r = bytestream2_get_byte(gb);
> unsigned g = bytestream2_get_byte(gb);
> --
> 2.21.0
Otherwise ok.
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