From 0f89a2293ea5f642a67700225d76948ed154418e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 25 Sep 2019 15:54:45 +0200 Subject: [PATCH] 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 Signed-off-by: Michael Niedermayer --- libavcodec/wmaprodec.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c index 41ca792548..e001dd6e4e 100644 --- a/libavcodec/wmaprodec.c +++ b/libavcodec/wmaprodec.c @@ -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;