[FFmpeg-devel] [PATCH 3/6] avformat/iamf_parse: Check for 0 samples

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 3/6] avformat/iamf_parse: Check for 0 samples
Date: Wed, 31 Jul 2024 21:54:07 +0200
Message-ID: <20240731195410.274508-3-michael@niedermayer.cc> (raw)
In-Reply-To: <20240731195410.274508-1-michael@niedermayer.cc>

Fixes: division by zero
Fixes: 70561/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6199435013455872
Fixes: 70565/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5783790316748800

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/iamf_parse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c
index cdfd5f75fef..e007d6a7af2 100644
--- a/libavformat/iamf_parse.c
+++ b/libavformat/iamf_parse.c
@@ -252,7 +252,7 @@ static int codec_config_obu(void *s, IAMFContext *c, AVIOContext *pb, int len)
     if (ret < 0)
         goto fail;
 
-    if ((codec_config->nb_samples > INT_MAX) ||
+    if ((codec_config->nb_samples > INT_MAX) || codec_config->nb_samples <= 0 ||
         (-codec_config->audio_roll_distance > INT_MAX / codec_config->nb_samples)) {
         ret = AVERROR_INVALIDDATA;
         goto fail;
-- 
2.45.2

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