Re: [FFmpeg-devel] [PATCH] libaformat: fix incorrect handling of incomplete AVBPrint.

[James Almer <jamrial@gmail.com>]

On 6/22/2023 6:04 PM, Reimar.Doeffinger@gmx.de wrote:
> diff --git a/libavformat/realtextdec.c b/libavformat/realtextdec.c
> index c281dec346..9f6aab789e 100644
> --- a/libavformat/realtextdec.c
> +++ b/libavformat/realtextdec.c
> @@ -80,6 +80,11 @@ static int realtext_read_header(AVFormatContext *s)
>           const int64_t pos = ff_text_pos(&tr) - (c != 0);
>           int n = ff_smil_extract_next_text_chunk(&tr, &buf, &c);
>   
> +        if (n < 0)
> +        {

Put the opening bracket in the same line as the if(), please.

> +            res = n;
> +            goto end;
> +        }
>           if (n == 0)
>               break;
>   
> @@ -103,7 +108,7 @@ static int realtext_read_header(AVFormatContext *s)
>               /* if we just read a <time> tag, introduce a new event, otherwise merge
>                * with the previous one */
>               int merge = !av_strncasecmp(buf.str, "<time", 5) ? 0 : 1;
> -            sub = ff_subtitles_queue_insert(&rt->q, buf.str, buf.len, merge);
> +            sub = ff_subtitles_queue_insert_bprint(&rt->q, &buf, merge);
>               if (!sub) {
>                   res = AVERROR(ENOMEM);
>                   goto end;
> diff --git a/libavformat/samidec.c b/libavformat/samidec.c
> index 0da299343d..6fff6019bf 100644
> --- a/libavformat/samidec.c
> +++ b/libavformat/samidec.c
> @@ -68,6 +68,11 @@ static int sami_read_header(AVFormatContext *s)
>           const int64_t pos = ff_text_pos(&tr) - (c != 0);
>           int is_sync, is_body, n = ff_smil_extract_next_text_chunk(&tr, &buf, &c);
>   
> +        if (n < 0)
> +        {

Ditto.

> +            res = n;
> +            goto end;
> +        }
>           if (n == 0)
>               break;
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