From 9d8945bd4949033dc4f2d21b5919fc3e91f06f0f Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 4 Oct 2021 23:54:46 +0200 Subject: [PATCH] avformat/wavdec: Check smv_block_size Fixes: Timeout Fixes: 39554/clusterfuzz-testcase-minimized-ffmpeg_dem_WAV_fuzzer-4915221701984256 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 849138f476f4b08656681bfc3aec5beac47777fb) Signed-off-by: Michael Niedermayer --- libavformat/wavdec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c index 051b3a5d23..4d2524f126 100644 --- a/libavformat/wavdec.c +++ b/libavformat/wavdec.c @@ -480,6 +480,8 @@ static int wav_read_header(AVFormatContext *s) wav->smv_data_ofs = avio_tell(pb) + (size - 5) * 3; avio_rl24(pb); wav->smv_block_size = avio_rl24(pb); + if (!wav->smv_block_size) + return AVERROR_INVALIDDATA; avpriv_set_pts_info(vst, 32, 1, avio_rl24(pb)); vst->duration = avio_rl24(pb); avio_rl24(pb);