From a53ffb15d8ae9bed14041b4cf62e436852e95431 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 24 Oct 2020 22:21:48 +0200 Subject: [PATCH] avcodec/exr: Check ymin vs. h Fixes: out of array access Fixes: 26532/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5613925708857344 Fixes: 27443/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EXR_fuzzer-5631239813595136 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 3e5959b3457f7f1856d997261e6ac672bba49e8b) Signed-off-by: Michael Niedermayer --- libavcodec/exr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/exr.c b/libavcodec/exr.c index 5c6e18ef89..2e008c8f6f 100644 --- a/libavcodec/exr.c +++ b/libavcodec/exr.c @@ -1814,7 +1814,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, // Zero out the start if ymin is not 0 for (i = 0; i < planes; i++) { ptr = picture->data[i]; - for (y = 0; y < s->ymin; y++) { + for (y = 0; y < FFMIN(s->ymin, s->h); y++) { memset(ptr, 0, out_line_size); ptr += picture->linesize[i]; }