From d0349c9929e2891c90011a83152624d5cf18e628 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sat, 17 Sep 2022 21:19:53 +0200
Subject: [PATCH] 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 <michael@niedermayer.cc>
---
libavformat/ape.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavformat/ape.c b/libavformat/ape.c
index f904fde178..92e9ac7cb1 100644
--- a/libavformat/ape.c
+++ b/libavformat/ape.c
@@ -298,6 +298,8 @@ 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) {