Michael Niedermayer:
> Fixes: memleak
> Fixes: 
> 26841/clusterfuzz-testcase-minimized-ffmpeg_dem_AU_fuzzer-5174166309044224
> 
> Found-by: continuous fuzzing process 
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> ---
>  libavformat/au.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/libavformat/au.c b/libavformat/au.c
> index b4eb4f8477..4f2b81119f 100644
> --- a/libavformat/au.c
> +++ b/libavformat/au.c
> @@ -84,8 +84,11 @@ static int au_read_annotation(AVFormatContext *s, int size)
>      av_bprint_init(&bprint, 64, AV_BPRINT_SIZE_UNLIMITED);
>  
>      while (size-- > 0) {
> -        if (avio_feof(pb))
> +        if (avio_feof(pb)) {
> +            av_bprint_finalize(&bprint, NULL);
> +            av_freep(&key);
>              return AVERROR_EOF;
> +        }
>          c = avio_r8(pb);
>          switch(state) {
>          case PARSE_KEY:
> 
You could reuse the ordinary freeing code at the end of the function.
LGTM either way. (That's a regression since
e680d50eb4feddafb2d8575b21fc5fc8764f4801, isn't it?)

- Andreas
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