From 48342aa0750f83006582d1598b5f22297f6dbf83 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 20 Apr 2021 20:24:21 +0200 Subject: avcodec/exr: x/ymax cannot be INT_MAX The code uses x/ymax + 1 so the maximum is INT_MAX-1 Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int' Fixes: 33158/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5545462457303040 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/exr.c | 1 + 1 file changed, 1 insertion(+) (limited to 'libavcodec') diff --git a/libavcodec/exr.c b/libavcodec/exr.c index fed4c127b8..9377a89169 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1795,6 +1795,7 @@ static int decode_header(EXRContext *s, AVFrame *frame) ymax = bytestream2_get_le32(gb); if (xmin > xmax || ymin > ymax || + ymax == INT_MAX || xmax == INT_MAX || (unsigned)xmax - xmin >= INT_MAX || (unsigned)ymax - ymin >= INT_MAX) { ret = AVERROR_INVALIDDATA; -- cgit v1.2.3