From 8a89cce372884c38c6f22eede59c43f486b83394 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 3 Feb 2018 21:36:22 +0100 Subject: [PATCH] avformat/mov: Move +1 in check to avoid hypothetical overflow in add_ctts_entry() Signed-off-by: Michael Niedermayer (cherry picked from commit eb60b9d3aaaa42265fb1960be6fff6383cfdbf37) Signed-off-by: Michael Niedermayer --- libavformat/mov.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/mov.c b/libavformat/mov.c index 6124b0b573..b60f8f0eac 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -2970,7 +2970,7 @@ static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, uns FFMAX(min_size_needed, 2 * (*allocated_size)) : min_size_needed; - if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts)) + if((unsigned)(*ctts_count) >= UINT_MAX / sizeof(MOVStts) - 1) return -1; ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);