Re: [FFmpeg-devel] [PATCH] libavformat/flac_picture: Don't return AVERROR_INVALIDDATA for errors with flac picture mimetype

[James Almer <jamrial@gmail.com>]

On 9/9/2022 7:44 PM, Will Cassella wrote:
> In the case where the FLAC picture MIME type is not understood, fail to
> parse the picture silently rather than return AVERROR_INVALIDDATA.
> 
> This originated from a bug reported in Chromium: https://crbug.com/1052821
> 
> Signed-off-by: Will Cassella <cassew@google.com>
> ---
>   libavformat/flac_picture.c | 4 ----
>   1 file changed, 4 deletions(-)
> 
> diff --git a/libavformat/flac_picture.c b/libavformat/flac_picture.c
> index b33fee75b4..1acad9b251 100644
> --- a/libavformat/flac_picture.c
> +++ b/libavformat/flac_picture.c
> @@ -68,8 +68,6 @@ int ff_flac_parse_picture(AVFormatContext *s,
> uint8_t **bufp, int buf_size,
>       if (len <= 0 || len >= sizeof(mimetype)) {
>           av_log(s, AV_LOG_ERROR, "Could not read mimetype from an attached "
>                  "picture.\n");
> -        if (s->error_recognition & AV_EF_EXPLODE)
> -            return AVERROR_INVALIDDATA;

If you don't want to error out, then don't enable explode mode, which is 
meant to abort on the slightest issue?

>           return 0;
>       }
>       if (len + 24 > bytestream2_get_bytes_left(&g)) {
> @@ -91,8 +89,6 @@ int ff_flac_parse_picture(AVFormatContext *s,
> uint8_t **bufp, int buf_size,
>       if (id == AV_CODEC_ID_NONE) {
>           av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
>                  mimetype);
> -        if (s->error_recognition & AV_EF_EXPLODE)
> -            return AVERROR_INVALIDDATA;
>           return 0;
>       }
> 
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