From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 3/5] avcodec/get_bits: Use FF_PTR_ADD() in init_get_bits()
Date: Thu, 3 Jul 2025 04:01:29 +0200
Message-ID: <20250703020131.2506428-3-michael@niedermayer.cc> (raw)
In-Reply-To: <20250703020131.2506428-1-michael@niedermayer.cc>
Fixes: NULL + 0
Fixes: 421817631/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APV_fuzzer-4957386534354944
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/get_bits.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/get_bits.h b/libavcodec/get_bits.h
index 19542965697..bf6929aa65d 100644
--- a/libavcodec/get_bits.h
+++ b/libavcodec/get_bits.h
@@ -511,7 +511,7 @@ static inline int init_get_bits(GetBitContext *s, const uint8_t *buffer,
s->buffer = buffer;
s->size_in_bits = bit_size;
s->size_in_bits_plus8 = bit_size + 8;
- s->buffer_end = buffer + buffer_size;
+ s->buffer_end = buffer_size ? buffer + buffer_size : buffer;
s->index = 0;
return ret;
--
2.49.0
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next prev parent reply other threads:[~2025-07-03 2:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-03 2:01 [FFmpeg-devel] [PATCH 1/5] avcodec/smacker: Move buffer allocation to later Michael Niedermayer
2025-07-03 2:01 ` [FFmpeg-devel] [PATCH 2/5] avcodec/smacker: Check input before allocation Michael Niedermayer
2025-07-03 2:01 ` Michael Niedermayer [this message]
2025-07-03 7:26 ` [FFmpeg-devel] [PATCH 3/5] avcodec/get_bits: Use FF_PTR_ADD() in init_get_bits() Kieran Kunhya via ffmpeg-devel
2025-07-03 13:50 ` Michael Niedermayer
2025-07-03 2:01 ` [FFmpeg-devel] [PATCH 4/5] avcodec/apv_dsp: Avoid UB overflow in dequant Michael Niedermayer
2025-07-03 2:01 ` [FFmpeg-devel] [PATCH 5/5] tools/target_dec_fuzzer: Adjust HQX threshold Michael Niedermayer
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