[FFmpeg-devel] [PATCH] avformat/mov: ensure required number of bytes is read

[James Almer]

On 8/7/2024 11:09 AM, Kacper Michajłow wrote:
> Fixes: use-of-uninitialized-value
> 
> Found by OSS-Fuzz.
> ---
>   libavformat/mov.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libavformat/mov.c b/libavformat/mov.c
> index 1052691936..f2d8aee766 100644
> --- a/libavformat/mov.c
> +++ b/libavformat/mov.c
> @@ -7096,7 +7096,7 @@ static int mov_read_free(MOVContext *c, AVIOContext *pb, MOVAtom atom)
>       if (atom.size < 8)
>           return 0;
>   
> -    ret = avio_read(pb, content, FFMIN(sizeof(content), atom.size));
> +    ret = ffio_read_size(pb, content, FFMIN(sizeof(content), atom.size));
>       if (ret < 0)
>           return ret;

Unrelated (somewhat) to this patch, but why does ffio_read_size() 
replace EOF with INVALIDDATA? Is it a good idea to mask the former?