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avcodec/wmaprodec: get frame during frame decode 

Fixes: memleak
Fixes: 17615/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XMA2_fuzzer-5681306024804352

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-09-25 15:54:45 +02:00
parent 10eabb8e40
commit 0f89a2293e
1 changed files with 6 additions and 4 deletions
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10
libavcodec/wmaprodec.c
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@ -1793,6 +1793,12 @@ static int xma_decode_packet(AVCodecContext *avctx, void *data,
AVFrame *frame = data;
int i, ret, offset = INT_MAX;
if (!s->frames[s->current_stream]->data[0]) {
s->frames[s->current_stream]->nb_samples = 512;
if ((ret = ff_get_buffer(avctx, s->frames[s->current_stream], 0)) < 0) {
return ret;
}
}
/* decode current stream packet */
ret = decode_packet(avctx, &s->xma[s->current_stream], s->frames[s->current_stream],
&got_stream_frame_ptr, avpkt);
@ -1920,10 +1926,6 @@ static av_cold int xma_decode_init(AVCodecContext *avctx)
s->frames[i] = av_frame_alloc();
if (!s->frames[i])
return AVERROR(ENOMEM);
s->frames[i]->nb_samples = 512;
if ((ret = ff_get_buffer(avctx, s->frames[i], 0)) < 0) {
return AVERROR(ENOMEM);
}
s->start_channel[i] = start_channels;
start_channels += s->xma[i].nb_channels;