avformat/mov: Check sample size for overflow in mov_parse_stsd_audio()

Fixes: signed integer overflow: 2 * 1914708000 cannot be represented in type 'int'
Fixes: 31639/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6303428239294464
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

diff --git a/libavformat/mov.c b/libavformat/mov.c
index aef5517c2c0f287b9f4388bd666b8e361fc21ec4..b90cec7173617bbd8cf7a927d99210a1dae5ed9a 100644 (file)
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -2263,7 +2263,7 @@ static void mov_parse_stsd_audio(MOVContext *c, AVIOContext *pb,
     }
 
     bits_per_sample = av_get_bits_per_sample(st->codecpar->codec_id);
-    if (bits_per_sample) {
+    if (bits_per_sample && (bits_per_sample >> 3) * (uint64_t)st->codecpar->channels <= INT_MAX) {
         st->codecpar->bits_per_coded_sample = bits_per_sample;
         sc->sample_size = (bits_per_sample >> 3) * st->codecpar->channels;
     }