From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 3/3] avcodec/leaddec: Check remaining bits in decode_block()
Date: Fri, 15 Dec 2023 02:48:28 +0100
Message-ID: <20231215014828.8115-3-michael@niedermayer.cc> (raw)
In-Reply-To: <20231215014828.8115-1-michael@niedermayer.cc>
Fixes: Timeout
Fixes: 64163/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LEAD_fuzzer-6418925835124736
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/leaddec.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavcodec/leaddec.c b/libavcodec/leaddec.c
index ede52fba5a9..4e97479b03c 100644
--- a/libavcodec/leaddec.c
+++ b/libavcodec/leaddec.c
@@ -104,6 +104,9 @@ static int decode_block(LeadContext * s, GetBitContext * gb,
s->bdsp.clear_block(block);
+ if (get_bits_left(gb) <= 0)
+ return AVERROR_INVALIDDATA;
+
size = get_vlc2(gb, dc_table, dc_bits, 1);
if (size < 0)
return AVERROR_INVALIDDATA;
--
2.17.1
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next prev parent reply other threads:[~2023-12-15 1:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-15 1:48 [FFmpeg-devel] [PATCH 1/3] tools/target_dec_fuzzer: Adjust threshold for QPEG Michael Niedermayer
2023-12-15 1:48 ` [FFmpeg-devel] [PATCH 2/3] avcodec/jpegxl_parser: Add padding to cs_buffer Michael Niedermayer
2023-12-15 1:48 ` Michael Niedermayer [this message]
2023-12-29 0:16 ` [FFmpeg-devel] [PATCH 1/3] tools/target_dec_fuzzer: Adjust threshold for QPEG Michael Niedermayer
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