From 1d6055972e50ef8757c8d2a3408a9a84bf6838fd Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 31 Jan 2021 16:30:59 +0100 Subject: [PATCH] avformat/avidec: Use 64bit in get_duration() Fixes: signed integer overflow: 2147483424 + 8224 cannot be represented in type 'int' Fixes: 29619/clusterfuzz-testcase-minimized-ffmpeg_dem_AVI_fuzzer-5191424373030912 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit a0ceb0cdd41b56241697cd8f83e22cdb4822d2d9) Signed-off-by: Michael Niedermayer --- libavformat/avidec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/avidec.c b/libavformat/avidec.c index a0aad5065f..5d67707994 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -126,7 +126,7 @@ static inline int get_duration(AVIStream *ast, int len) if (ast->sample_size) return len; else if (ast->dshow_block_align) - return (len + ast->dshow_block_align - 1) / ast->dshow_block_align; + return (len + (int64_t)ast->dshow_block_align - 1) / ast->dshow_block_align; else return 1; }