[FFmpeg-devel] [PATCH 2/6] lavc/avpacket: check NULL before using the pointer

[Carl Eugen Hoyos]

Am Fr., 10. Mai 2019 um 18:13 Uhr schrieb Jun Zhao <mypopydev at gmail.com>:
>
> From: Jun Zhao <barryjzhao at tencent.com>
>
> Need to check NULL before using the pointer
>
> Signed-off-by: Jun Zhao <barryjzhao at tencent.com>
> ---
>  libavcodec/avpacket.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
> index 8f0603d..2b20067 100644
> --- a/libavcodec/avpacket.c
> +++ b/libavcodec/avpacket.c
> @@ -522,11 +522,12 @@ fail:
>
>  int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
>  {
> -    const uint8_t *end = data + size;
> +    const uint8_t *end;
>      int ret = 0;
>
>      if (!dict || !data || !size)
>          return ret;
> +    end = data + size;

Could somebody explain to me why this is necessary?

Thank you, Carl Eugen