From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] avcodec/scpr3: Check bx
Date: Mon, 16 Jan 2023 11:14:33 +0100
Message-ID: <20230116101433.10989-1-michael@niedermayer.cc> (raw)
Fixes: Out of array access
Fixes: 55102/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCPR_fuzzer-4877396618903552
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/scpr3.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/scpr3.c b/libavcodec/scpr3.c
index d9ea6af1c1..5271717ac7 100644
--- a/libavcodec/scpr3.c
+++ b/libavcodec/scpr3.c
@@ -1167,6 +1167,9 @@ static int decompress_p3(AVCodecContext *avctx,
int run, bx = x * 16 + sx1, by = y * 16 + sy1;
uint32_t clr, ptype = 0, r, g, b;
+ if (bx >= avctx->width)
+ return AVERROR_INVALIDDATA;
+
for (; by < y * 16 + sy2 && by < avctx->height;) {
ret = decode_value3(s, 5, &s->op_model3[ptype].cntsum,
s->op_model3[ptype].freqs[0],
--
2.17.1
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next reply other threads:[~2023-01-16 10:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-16 10:14 Michael Niedermayer [this message]
2023-01-17 11:52 ` Michael Niedermayer
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