From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 4/4] libavcodec/8bps: Check that line lengths fit within the buffer
Date: Tue, 23 Aug 2022 00:55:47 +0200
Message-ID: <20220822225547.12895-4-michael@niedermayer.cc> (raw)
In-Reply-To: <20220822225547.12895-1-michael@niedermayer.cc>
Fixes: Timeout
Fixes: undefined pointer arithmetic
Fixes: 50330/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EIGHTBPS_fuzzer-5436287485607936
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/8bps.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/8bps.c b/libavcodec/8bps.c
index 3bac9f64c4..4a3511948b 100644
--- a/libavcodec/8bps.c
+++ b/libavcodec/8bps.c
@@ -71,6 +71,9 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
unsigned char *planemap = c->planemap;
int ret;
+ if (buf_size < planes * height *2)
+ return AVERROR_INVALIDDATA;
+
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
--
2.17.1
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next prev parent reply other threads:[~2022-08-22 22:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-22 22:55 [FFmpeg-devel] [PATCH 1/4] libavformat/iff: Check for overflow in body_end calculation Michael Niedermayer
2022-08-22 22:55 ` [FFmpeg-devel] [PATCH 2/4] avcodec/midivid: Perform lzss_uncompress() before ff_reget_buffer() Michael Niedermayer
2022-08-22 22:55 ` [FFmpeg-devel] [PATCH 3/4] tools/target_dec_fuzzer: Adjust threshold for MVDV Michael Niedermayer
2022-08-22 22:55 ` Michael Niedermayer [this message]
2022-08-28 17:47 ` [FFmpeg-devel] [PATCH 1/4] libavformat/iff: Check for overflow in body_end calculation Michael Niedermayer
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