From 1b7a327b3a43df6ab82885cea5ae02bf9dd899a9 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 23 Jul 2025 13:36:42 +0200 Subject: [PATCH] avformat/vqf: Ensure that comm_chunk is fully read Fixes: use of uninitialized memory Fixes: 412125811/clusterfuzz-testcase-minimized-ffmpeg_dem_VQF_fuzzer-6253774274887680 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/vqf.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavformat/vqf.c b/libavformat/vqf.c index 053720ea22..fb668c16da 100644 --- a/libavformat/vqf.c +++ b/libavformat/vqf.c @@ -144,7 +144,9 @@ static int vqf_read_header(AVFormatContext *s) if (len < 12) return AVERROR_INVALIDDATA; - avio_read(s->pb, comm_chunk, 12); + ret = ffio_read_size(s->pb, comm_chunk, 12); + if (ret < 0) + return ret; st->codecpar->ch_layout.nb_channels = AV_RB32(comm_chunk) + 1; read_bitrate = AV_RB32(comm_chunk + 4); rate_flag = AV_RB32(comm_chunk + 8);