From c5d5fb2309cd93953e137dacb09ee0ceb8494733 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 7 Mar 2026 13:48:49 +0100 Subject: [PATCH] avformat/dhav: Fix handling or slightly larger files Fixes: integer overflow Fixes: 490241718/clusterfuzz-testcase-minimized-ffmpeg_dem_DHAV_fuzzer-4902512932225024 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/dhav.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/dhav.c b/libavformat/dhav.c index 449e5bfb0a..598780e8b8 100644 --- a/libavformat/dhav.c +++ b/libavformat/dhav.c @@ -252,7 +252,7 @@ static int64_t get_duration(AVFormatContext *s) int64_t size = avio_size(s->pb); int64_t ret = 0; - if (start_pos + 20 > size) + if (start_pos < 0 || start_pos > size - 20) return 0; avio_skip(s->pb, 16);