From 9ef60a66f1f155605049402415bd901c8baf1a24 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 10 Nov 2020 00:04:50 +0100 Subject: [PATCH] avformat/sbgdec: Check that end is not before start Fixes: signed integer overflow: -9223372036854775808 + -5279949906739200 cannot be represented in type 'long' Fixes: 26908/clusterfuzz-testcase-minimized-ffmpeg_dem_SBG_fuzzer-6329610851319808 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Nicolas George Signed-off-by: Michael Niedermayer --- libavformat/sbgdec.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c index 4d6ae7abc5..f56eb9ff59 100644 --- a/libavformat/sbgdec.c +++ b/libavformat/sbgdec.c @@ -1416,6 +1416,11 @@ static av_cold int sbg_read_header(AVFormatContext *avf) if (r < 0) goto fail; + if (script.end_ts != AV_NOPTS_VALUE && script.end_ts < script.start_ts) { + r = AVERROR_INVALIDDATA; + goto fail; + } + st = avformat_new_stream(avf, NULL); if (!st) return AVERROR(ENOMEM);