Andriy Gelman:
> From: Andriy Gelman <andriy.gel...@gmail.com>
>
> In the worst case the startcode prefix has 4 bytes.
>
> This fixes a trigerred assertion:
> Assertion dp <= max_size failed at libavcodec/cbs_h2645.c:1451
>
> Found-by:libFuzzer
> Signed-off-by: Andriy Gelman <andriy.gel...@gmail.com>
> ---
> libavcodec/cbs_h2645.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
> index 88fa0029cd6..5f71d805848 100644
> --- a/libavcodec/cbs_h2645.c
> +++ b/libavcodec/cbs_h2645.c
> @@ -1395,7 +1395,7 @@ static int
> cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
> max_size = 0;
> for (i = 0; i < frag->nb_units; i++) {
> // Start code + content with worst-case emulation prevention.
> - max_size += 3 + frag->units[i].data_size * 3 / 2;
> + max_size += 4 + frag->units[i].data_size * 3 / 2;
> }
>
> data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_SIZE);
>
LGTM. I presume you used a NAL unit of size 1?
(I found this out, too, when I tried (and postponed) to add mp4
writing support for H.264.)
- Andreas
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
