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Code Issues Releases Activity

libavformat/mov: Fix memleaks when demuxing DV audio

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The code for demuxing DV audio predates the introduction of refcounted
packets and when the latter was added, changes to the former were
forgotten. This meant that when avpriv_dv_produce_packet initialized the
packet containing the AVBufferRef, the AVBufferRef as well as the
underlying AVBuffer leaked; the actual packet data didn't leak: They
were directly freed, but not via their AVBuffer's free function.

https://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket4671/dir1.tar.bz2
contains samples for this (enable_drefs needs to be enabled for them).

Moreover, errors in avpriv_dv_produce_packet were ignored; this has been
changed, too.

Furthermore, in the hypothetical scenario that the track has a palette,
this would leak, too, so reorder the code so that the palette code
appears after the DV audio code.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-09-16 15:48:31 +02:00
parent 42b28565aa
commit 61f5c6ab06
1 changed files with 13 additions and 10 deletions
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23
libavformat/mov.c
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@ -7898,6 +7898,19 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
}
return ret;
}
#if CONFIG_DV_DEMUXER
if (mov->dv_demux && sc->dv_audio_container) {
AVBufferRef *buf = pkt->buf;
ret = avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
pkt->buf = buf;
av_packet_unref(pkt);
if (ret < 0)
return ret;
ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
if (ret < 0)
return ret;
}
#endif
if (sc->has_palette) {
uint8_t *pal;
@ -7909,16 +7922,6 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
sc->has_palette = 0;
}
}
#if CONFIG_DV_DEMUXER
if (mov->dv_demux && sc->dv_audio_container) {
avpriv_dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size, pkt->pos);
av_freep(&pkt->data);
pkt->size = 0;
ret = avpriv_dv_get_packet(mov->dv_demux, pkt);
if (ret < 0)
return ret;
}
#endif
if (st->codecpar->codec_id == AV_CODEC_ID_MP3 && !st->need_parsing && pkt->size > 4) {
if (ff_mpa_check_header(AV_RB32(pkt->data)) < 0)
st->need_parsing = AVSTREAM_PARSE_FULL;