From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 6/6] avcodec/tiff: do not try to read a value from a 0 value linearization table
Date: Thu, 12 Jan 2023 00:54:32 +0100
Message-ID: <20230111235432.2135-6-michael@niedermayer.cc> (raw)
In-Reply-To: <20230111235432.2135-1-michael@niedermayer.cc>
Fixes: index 4294967295 out of bounds for type 'uint16_t [65536]'
Fixes: 48567/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-6666195176914944
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/tiff.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 1a1879de89..c3f67860db 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -1451,7 +1451,7 @@ static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
break;
case TIFF_GRAY_RESPONSE_CURVE:
case DNG_LINEARIZATION_TABLE:
- if (count > FF_ARRAY_ELEMS(s->dng_lut))
+ if (count > FF_ARRAY_ELEMS(s->dng_lut) || count < 1)
return AVERROR_INVALIDDATA;
for (int i = 0; i < count; i++)
s->dng_lut[i] = ff_tget(&s->gb, type, s->le);
--
2.17.1
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next prev parent reply other threads:[~2023-01-11 23:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-11 23:54 [FFmpeg-devel] [PATCH 1/6] avcodec/eatgq: : Check index increments in tgq_decode_block() Michael Niedermayer
2023-01-11 23:54 ` [FFmpeg-devel] [PATCH 2/6] avcodec/pngdec: Check deloco index more exactly Michael Niedermayer
2023-02-23 22:21 ` Michael Niedermayer
2023-01-11 23:54 ` [FFmpeg-devel] [PATCH 3/6] avcodec/pngdec: dont skip/read chunk twice Michael Niedermayer
2023-02-23 22:22 ` Michael Niedermayer
2023-01-11 23:54 ` [FFmpeg-devel] [PATCH 4/6] avcodec/sgidec: do not forget the number of components in read_uncompressed_sgi() Michael Niedermayer
2023-01-12 0:02 ` Andreas Rheinhardt
2023-01-12 14:28 ` Michael Niedermayer
2023-01-11 23:54 ` [FFmpeg-devel] [PATCH 5/6] avcodec/videodsp_template: Adjust pointers to avoid undefined pointer things Michael Niedermayer
2023-02-23 22:23 ` Michael Niedermayer
2023-01-11 23:54 ` Michael Niedermayer [this message]
2023-01-15 2:50 ` [FFmpeg-devel] [PATCH 1/6] avcodec/eatgq: : Check index increments in tgq_decode_block() Peter Ross
2023-01-15 17:21 ` Michael Niedermayer
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