[FFmpeg-cvslog] avformat/nistspheredec: Check bps

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Mon Oct 19 10:53:31 2020 +0200| [7c144b363e67bef7651108c88687b38155172c1f] | committer: Michael Niedermayer

avformat/nistspheredec: Check bps

Fixes: left shift of 1111111190 by 3 places cannot be represented in type 'int'
Fixes: 26437/clusterfuzz-testcase-minimized-ffmpeg_dem_NISTSPHERE_fuzzer-4886896091856896

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7c144b363e67bef7651108c88687b38155172c1f
---

 libavformat/nistspheredec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/nistspheredec.c b/libavformat/nistspheredec.c
index 3ef3843d5e..079369929f 100644
--- a/libavformat/nistspheredec.c
+++ b/libavformat/nistspheredec.c
@@ -109,6 +109,8 @@ static int nist_read_header(AVFormatContext *s)
             sscanf(buffer, "%*s %*s %"SCNd64, &st->duration);
         } else if (!memcmp(buffer, "sample_n_bytes", 14)) {
             sscanf(buffer, "%*s %*s %d", &bps);
+            if (bps > INT_MAX/8U)
+                return AVERROR_INVALIDDATA;
         } else if (!memcmp(buffer, "sample_rate", 11)) {
             sscanf(buffer, "%*s %*s %d", &st->codecpar->sample_rate);
         } else if (!memcmp(buffer, "sample_sig_bits", 15)) {