Michael Niedermayer:
> The length is 64bit that is passed into the functions.
> Alternatively the values can be checked before cast
>
> Fixes: CID1604572 Overflowed return value
>
> Sponsored-by: Sovereign Tech Fund
> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> ---
> libavformat/matroskadec.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
> index aa28a37da4c..9914838698c 100644
> --- a/libavformat/matroskadec.c
> +++ b/libavformat/matroskadec.c
> @@ -989,7 +989,7 @@ static int ebml_read_length(MatroskaDemuxContext
> *matroska, AVIOContext *pb,
> * Read the next element as an unsigned int.
> * Returns NEEDS_CHECKING unless size == 0.
> */
> -static int ebml_read_uint(AVIOContext *pb, int size,
> +static int ebml_read_uint(AVIOContext *pb, int64_t size,
> uint64_t default_value, uint64_t *num)
> {
> int n = 0;
> @@ -1010,7 +1010,7 @@ static int ebml_read_uint(AVIOContext *pb, int size,
> * Read the next element as a signed int.
> * Returns NEEDS_CHECKING unless size == 0.
> */
> -static int ebml_read_sint(AVIOContext *pb, int size,
> +static int ebml_read_sint(AVIOContext *pb, int64_t size,
> int64_t default_value, int64_t *num)
> {
> int n = 1;
> @@ -1033,7 +1033,7 @@ static int ebml_read_sint(AVIOContext *pb, int size,
> * Read the next element as a float.
> * Returns 0 if size == 0, NEEDS_CHECKING or < 0 on obvious failure.
> */
> -static int ebml_read_float(AVIOContext *pb, int size,
> +static int ebml_read_float(AVIOContext *pb, int64_t size,
> double default_value, double *num)
> {
> if (size == 0) {
The values are already checked before that (via the max_lengths list).
- Andreas
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