Re: [FFmpeg-devel] [PATCH 2/2] libavformat/takdec.c: Fix msan error.

[Thierry Foucu <tfoucu@gmail.com>]

On Mon, Apr 7, 2025 at 11:10 AM <tfoucu@google.com> wrote:

> From: Thierry Foucu <tfoucu@gmail.com>
>
> Make sure we are reading 16 bytes for the MD5
> ---
>  libavformat/takdec.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/libavformat/takdec.c b/libavformat/takdec.c
> index 21fff3fcbf..61b9f001c4 100644
> --- a/libavformat/takdec.c
> +++ b/libavformat/takdec.c
> @@ -19,6 +19,7 @@
>   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> 02110-1301 USA
>   */
>
> +#include <libavutil/error.h>
>  #include "libavutil/crc.h"
>  #include "libavutil/mem.h"
>
> @@ -116,7 +117,9 @@ static int tak_read_header(AVFormatContext *s)
>              if (size != 19)
>                  return AVERROR_INVALIDDATA;
>              ffio_init_checksum(pb, tak_check_crc, 0xCE04B7U);
> -            avio_read(pb, md5, 16);
> +            if (avio_read(pb, md5, 16) != 16) {
> +                return AVERROR(EIO);
> +            }
>              if (ffio_get_checksum(s->pb) != avio_rb24(pb)) {
>                  av_log(s, AV_LOG_ERROR, "MD5 metadata block CRC
> error.\n");
>                  if (s->error_recognition & AV_EF_EXPLODE)
> --
> 2.49.0.504.g3bcea36a83-goog
>
>
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