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avformat/oggenc: Don't free AVStream's priv_data, fix memleak 

For FLAC, Speex, Opus and VP8 the Ogg muxer allocates two buffers
for building the headers: The first for extradata in an Ogg-specific
format and the second contains a Vorbiscomment. These buffers are
reachable via pointers in the corresponding AVStream's priv_data.

If an error happens during building the headers, the AVStream's
priv_data would be freed. This is pointless in general as it would be
freed generically anyway, but here it is actively harmful: If the second
of the aforementioned allocations fails, the first buffer would leak
upon freeing priv_data.

This commit stops freeing priv_data manually, which allows the muxer to
properly clean up in the deinit function.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
(cherry picked from commit 0fcf74f435)
This commit is contained in:
Andreas Rheinhardt 2020-04-14 04:30:59 +02:00
parent df88108c97
commit f60a1e8d34
1 changed files with 1 additions and 6 deletions
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7
libavformat/oggenc.c
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@ -547,7 +547,6 @@ static int ogg_init(AVFormatContext *s)
&st->metadata);
if (err) {
av_log(s, AV_LOG_ERROR, "Error writing FLAC headers\n");
av_freep(&st->priv_data);
return err;
}
} else if (st->codecpar->codec_id == AV_CODEC_ID_SPEEX) {
@ -556,7 +555,6 @@ static int ogg_init(AVFormatContext *s)
&st->metadata);
if (err) {
av_log(s, AV_LOG_ERROR, "Error writing Speex headers\n");
av_freep(&st->priv_data);
return err;
}
} else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
@ -565,7 +563,6 @@ static int ogg_init(AVFormatContext *s)
&st->metadata, s->chapters, s->nb_chapters);
if (err) {
av_log(s, AV_LOG_ERROR, "Error writing Opus headers\n");
av_freep(&st->priv_data);
return err;
}
} else if (st->codecpar->codec_id == AV_CODEC_ID_VP8) {
@ -573,7 +570,6 @@ static int ogg_init(AVFormatContext *s)
s->flags & AVFMT_FLAG_BITEXACT);
if (err) {
av_log(s, AV_LOG_ERROR, "Error writing VP8 headers\n");
av_freep(&st->priv_data);
return err;
}
} else {
@ -586,7 +582,7 @@ static int ogg_init(AVFormatContext *s)
st->codecpar->codec_id == AV_CODEC_ID_VORBIS ? 30 : 42,
(const uint8_t**)oggstream->header, oggstream->header_len) < 0) {
av_log(s, AV_LOG_ERROR, "Extradata corrupted\n");
av_freep(&st->priv_data);
oggstream->header[1] = NULL;
return AVERROR_INVALIDDATA;
}
@ -754,7 +750,6 @@ static void ogg_free(AVFormatContext *s)
av_freep(&oggstream->header[0]);
}
av_freep(&oggstream->header[1]);
av_freep(&st->priv_data);
}
}