From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] avcodec/qpeldsp: copy less for the mc0x cases
Date: Sun, 26 Jun 2022 15:51:46 +0200
Message-ID: <20220626135146.13096-1-michael@niedermayer.cc> (raw)
Fixes: out of array access
Fixes: 47936/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-5745039940124672
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavcodec/qpeldsp.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/libavcodec/qpeldsp.c b/libavcodec/qpeldsp.c
index 2b9146ceb1..5f937f9d9e 100644
--- a/libavcodec/qpeldsp.c
+++ b/libavcodec/qpeldsp.c
@@ -199,7 +199,7 @@ static void OPNAME ## qpel8_mc01_c(uint8_t *dst, const uint8_t *src, \
uint8_t full[16 * 9]; \
uint8_t half[64]; \
\
- copy_block9(full, src, 16, stride, 9); \
+ copy_block8(full, src, 16, stride, 9); \
put ## RND ## mpeg4_qpel8_v_lowpass(half, full, 8, 16); \
OPNAME ## pixels8_l2_8(dst, full, half, stride, 16, 8, 8); \
} \
@@ -209,7 +209,7 @@ static void OPNAME ## qpel8_mc02_c(uint8_t *dst, const uint8_t *src, \
{ \
uint8_t full[16 * 9]; \
\
- copy_block9(full, src, 16, stride, 9); \
+ copy_block8(full, src, 16, stride, 9); \
OPNAME ## mpeg4_qpel8_v_lowpass(dst, full, stride, 16); \
} \
\
@@ -219,7 +219,7 @@ static void OPNAME ## qpel8_mc03_c(uint8_t *dst, const uint8_t *src, \
uint8_t full[16 * 9]; \
uint8_t half[64]; \
\
- copy_block9(full, src, 16, stride, 9); \
+ copy_block8(full, src, 16, stride, 9); \
put ## RND ## mpeg4_qpel8_v_lowpass(half, full, 8, 16); \
OPNAME ## pixels8_l2_8(dst, full + 16, half, stride, 16, 8, 8); \
} \
@@ -459,7 +459,7 @@ static void OPNAME ## qpel16_mc01_c(uint8_t *dst, const uint8_t *src, \
uint8_t full[24 * 17]; \
uint8_t half[256]; \
\
- copy_block17(full, src, 24, stride, 17); \
+ copy_block16(full, src, 24, stride, 17); \
put ## RND ## mpeg4_qpel16_v_lowpass(half, full, 16, 24); \
OPNAME ## pixels16_l2_8(dst, full, half, stride, 24, 16, 16); \
} \
@@ -469,7 +469,7 @@ static void OPNAME ## qpel16_mc02_c(uint8_t *dst, const uint8_t *src, \
{ \
uint8_t full[24 * 17]; \
\
- copy_block17(full, src, 24, stride, 17); \
+ copy_block16(full, src, 24, stride, 17); \
OPNAME ## mpeg4_qpel16_v_lowpass(dst, full, stride, 24); \
} \
\
@@ -479,7 +479,7 @@ static void OPNAME ## qpel16_mc03_c(uint8_t *dst, const uint8_t *src, \
uint8_t full[24 * 17]; \
uint8_t half[256]; \
\
- copy_block17(full, src, 24, stride, 17); \
+ copy_block16(full, src, 24, stride, 17); \
put ## RND ## mpeg4_qpel16_v_lowpass(half, full, 16, 24); \
OPNAME ## pixels16_l2_8(dst, full + 24, half, stride, 24, 16, 16); \
} \
--
2.17.1
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next reply other threads:[~2022-06-26 13:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-26 13:51 Michael Niedermayer [this message]
2022-06-27 5:57 ` Andreas Rheinhardt
2022-06-27 12:40 ` Michael Niedermayer
2022-07-12 18:13 ` Michael Niedermayer
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