On Fri, Dec 13, 2019 at 3:07 AM Michael Niedermayer <mich...@niedermayer.cc>
wrote:
> No testcase
>
> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> ---
> libavcodec/hevc_mp4toannexb_bsf.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/hevc_mp4toannexb_bsf.c
> b/libavcodec/hevc_mp4toannexb_bsf.c
> index baa93628ed..e0d20a550c 100644
> --- a/libavcodec/hevc_mp4toannexb_bsf.c
> +++ b/libavcodec/hevc_mp4toannexb_bsf.c
> @@ -152,7 +152,9 @@ static int hevc_mp4toannexb_filter(AVBSFContext *ctx,
> AVPacket *out)
> extra_size = add_extradata * ctx->par_out->extradata_size;
> got_irap |= is_irap;
>
> - if (FFMIN(INT_MAX, SIZE_MAX) < 4ULL + nalu_size + extra_size) {
> + if (FFMIN(INT_MAX, SIZE_MAX) < 4ULL + nalu_size + extra_size ||
>
Up until now I thought that FFmpeg has some implicit assumptions: int
having 32bit being one of them (the log2 functions depend on this). And I
also thought that size_t being able to hold all the values of an unsigned
was one of these implicit assumptions, too. Am I wrong on this?
A testcase for the last condition is easy to produce by simply manipulating
the size field of a NAL unit.
- Andreas
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