From 25c439296ba1e835599370de331f9a089f7efe37 Mon Sep 17 00:00:00 2001 From: James Almer Date: Sat, 1 Mar 2025 23:51:25 -0300 Subject: [PATCH] avformat/mov: fix overflow in corrected_dts calculation Fixes: Integer-overflow Fixes: 400093647/clusterfuzz-testcase-minimized-media_metadata_parser_fuzzer-4794341562187776 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: James Almer --- libavformat/mov.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/mov.c b/libavformat/mov.c index ee44b10435..57d9364ea2 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -3539,7 +3539,7 @@ static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom) av_log(c->fc, AV_LOG_WARNING, "Too large sample offset %u in stts entry %u with count %u in st:%d. Clipping to 1.\n", sample_duration, i, sample_count, st->index); sc->stts_data[i].duration = 1; - corrected_dts += (delta_magnitude < 0 ? (int64_t)delta_magnitude : 1) * sample_count; + corrected_dts = av_sat_add64(corrected_dts, (delta_magnitude < 0 ? (int64_t)delta_magnitude : 1) * sample_count); } else { corrected_dts += sample_duration * (uint64_t)sample_count; }