[FFmpeg-devel] [PATCH 3/5] avformat/flvdec: timestamps cannot use the full int64 range

[Michael Niedermayer]

We do not support this as we multiply by 1000
Fixes: signed integer overflow: -45318575073853696 * 1000 cannot be represented in type 'long'
Fixes: 42804/clusterfuzz-testcase-minimized-ffmpeg_dem_LIVE_FLV_fuzzer-4630325425209344

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

diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 44a7e5f93cc..b9e36b3ff1b 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -461,6 +461,8 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t m
             d = av_int2double(avio_rb64(ioc));
             if (isnan(d) || d < INT64_MIN || d > INT64_MAX)
                 goto invalid;
+            if (current_array == &times && (d <= INT64_MIN / 1000 || d >= INT64_MAX / 1000))
+                goto invalid;
             current_array[0][i] = d;
         }
         if (times && filepositions) {
-- 
2.17.1