diff options
| author | Andreas Rheinhardt <[email protected]> | 2020-09-20 08:05:58 +0200 |
|---|---|---|
| committer | Andreas Rheinhardt <[email protected]> | 2021-02-27 07:20:58 +0100 |
| commit | ffb0cad8f9d6ca00cc0959555e4f5879bbc1d241 (patch) | |
| tree | f69c8d0e583b9bed522a63d0b0065ff5fc3d5c3e | |
| parent | 2d91ddd2dff1eae935f958135bf3658e7c56e341 (diff) | |
avformat/swfenc: Fix memleak upon write_header error
The SWF muxer accepts at most one mp3 audio and at most one VP6F, FLV1
or MJPEG stream. Upon encountering an mp3 stream, a fifo is allocated
that leaks if one of the subsequent streams is incompliant with the
restrictions mentioned above or if the framerate or samplerate are
invalid. This is fixed by adding a deinit function to free said fifo.
Reviewed-by: Paul B Mahol <[email protected]>
Signed-off-by: Andreas Rheinhardt <[email protected]>
(cherry picked from commit d554aabdaf81fc3ea99783aca42649b43013e796)
| -rw-r--r-- | libavformat/swfenc.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/libavformat/swfenc.c b/libavformat/swfenc.c index 9da4aad959..750ec56ec1 100644 --- a/libavformat/swfenc.c +++ b/libavformat/swfenc.c @@ -482,24 +482,13 @@ static int swf_write_trailer(AVFormatContext *s) { SWFContext *swf = s->priv_data; AVIOContext *pb = s->pb; - AVCodecParameters *par, *video_par; - int file_size, i; - - video_par = NULL; - for(i=0;i<s->nb_streams;i++) { - par = s->streams[i]->codecpar; - if (par->codec_type == AVMEDIA_TYPE_VIDEO) - video_par = par; - else { - av_fifo_freep(&swf->audio_fifo); - } - } + int file_size; put_swf_tag(s, TAG_END); put_swf_end_tag(s); /* patch file size and number of frames if not streamed */ - if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && video_par) { + if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && swf->video_par) { file_size = avio_tell(pb); avio_seek(pb, 4, SEEK_SET); avio_wl32(pb, file_size); @@ -514,6 +503,13 @@ static int swf_write_trailer(AVFormatContext *s) return 0; } +static void swf_deinit(AVFormatContext *s) +{ + SWFContext *swf = s->priv_data; + + av_fifo_freep(&swf->audio_fifo); +} + #if CONFIG_SWF_MUXER AVOutputFormat ff_swf_muxer = { .name = "swf", @@ -526,6 +522,7 @@ AVOutputFormat ff_swf_muxer = { .write_header = swf_write_header, .write_packet = swf_write_packet, .write_trailer = swf_write_trailer, + .deinit = swf_deinit, .flags = AVFMT_TS_NONSTRICT, }; #endif @@ -540,6 +537,7 @@ AVOutputFormat ff_avm2_muxer = { .write_header = swf_write_header, .write_packet = swf_write_packet, .write_trailer = swf_write_trailer, + .deinit = swf_deinit, .flags = AVFMT_TS_NONSTRICT, }; #endif |