Fixes: signed integer overflow: -3483479120376300096 - 7442323944145700864 cannot be represented in type 'long' Fixes: 383187489/clusterfuzz-testcase-minimized-ffmpeg_dem_WEBM_DASH_MANIFEST_fuzzer-4561470580391936
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/matroskadec.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index 0e150f9138e..efa3e44c858 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -4618,9 +4618,10 @@ static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t // The prebuffer ends in the last Cue. Estimate how much data was // prebuffered. pre_bytes = desc_end.end_offset - desc_end.start_offset; - pre_ns = desc_end.end_time_ns - desc_end.start_time_ns; - if (pre_ns <= 0) + if (desc_end.end_time_ns <= desc_end.start_time_ns || + desc_end.end_time_ns - (uint64_t)desc_end.start_time_ns > INT64_MAX) return -1; + pre_ns = desc_end.end_time_ns - desc_end.start_time_ns; pre_sec = pre_ns / nano_seconds_per_second; prebuffer_bytes += pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec); -- 2.47.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
