From 6cec2a4a99f24fb3b491bf38f391a0a16dfa3b94 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 4 Oct 2023 23:32:17 +0200 Subject: [PATCH] avcodec/jpeg2000dec: Check image offset MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fixes: left shift of negative value -538967841 Fixes: 62447/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6427134337613824 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Tomas Härdin Signed-off-by: Michael Niedermayer (cherry picked from commit 88453250dbe952e85899d04867914ef95785530e) Signed-off-by: Michael Niedermayer --- libavcodec/jpeg2000dec.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 77dcdb6b44..42a0dceeb0 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -312,6 +312,11 @@ static int get_siz(Jpeg2000DecoderContext *s) return AVERROR_INVALIDDATA; } + if (s->image_offset_x >= s->width || s->image_offset_y >= s->height) { + av_log(s->avctx, AV_LOG_ERROR, "image offsets outside image"); + return AVERROR_INVALIDDATA; + } + if (s->reduction_factor && (s->image_offset_x || s->image_offset_y) ){ av_log(s->avctx, AV_LOG_ERROR, "reduction factor with image offsets is not fully implemented"); return AVERROR_PATCHWELCOME;