From 8e41675e18682ee14a64acf6139d72d22ce669b6 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 13 Jul 2019 20:08:03 +0200 Subject: [PATCH] avformat/vividas: Check if extradata was read successfully Fixes: OOM Fixes: 15575/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5654666781655040 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/vividas.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/libavformat/vividas.c b/libavformat/vividas.c index 830e318645..c0d39f0a6f 100644 --- a/libavformat/vividas.c +++ b/libavformat/vividas.c @@ -386,7 +386,12 @@ static void track_header(VividasDemuxContext *viv, AVFormatContext *s, uint8_t offset += av_xiphlacing(&p[offset], data_len[j]); for (j = 0; j < num_data; j++) { - avio_read(pb, &p[offset], data_len[j]); + int ret = avio_read(pb, &p[offset], data_len[j]); + if (ret < data_len[j]) { + st->codecpar->extradata_size = 0; + av_freep(&st->codecpar->extradata); + break; + } offset += data_len[j]; }