From 3e208ef0886f3e45931357f2c2a7b26c65f2352b Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 17 Sep 2022 21:19:53 +0200 Subject: avformat/ape: Check frames size Fixes: signed integer overflow: 9223372036854775806 + 3 cannot be represented in type 'long' Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_APE_fuzzer-6389264140599296 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit d0349c9929e2891c90011a83152624d5cf18e628) Signed-off-by: Michael Niedermayer --- libavformat/ape.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/ape.c b/libavformat/ape.c index 3a3b91283e..c3cc7b6445 100644 --- a/libavformat/ape.c +++ b/libavformat/ape.c @@ -323,6 +323,8 @@ static int ape_read_header(AVFormatContext * s) ape->frames[i].pos -= ape->frames[i].skip; ape->frames[i].size += ape->frames[i].skip; } + if (ape->frames[i].size > INT_MAX - 3) + return AVERROR_INVALIDDATA; ape->frames[i].size = (ape->frames[i].size + 3) & ~3; } if (ape->fileversion < 3810) { -- cgit v1.2.1