[FFmpeg-cvslog] avcodec/qpeldsp: copy less for the mc0x cases

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sun Jun 26 00:59:15 2022 +0200| [985803bbb726c2301c62fce5014c46c320d2438d] | committer: Michael Niedermayer

avcodec/qpeldsp: copy less for the mc0x cases

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 at niedermayer.cc>
(cherry picked from commit e690d4edf581c42dbd907c0fafe53fba86a00812)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=985803bbb726c2301c62fce5014c46c320d2438d
---

 libavcodec/qpeldsp.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libavcodec/qpeldsp.c b/libavcodec/qpeldsp.c
index 6e52b33657..d99b8fd0ba 100644
--- a/libavcodec/qpeldsp.c
+++ b/libavcodec/qpeldsp.c
@@ -198,7 +198,7 @@ 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);                \
 }                                                                             \
@@ -208,7 +208,7 @@ 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);                   \
 }                                                                             \
                                                                               \
@@ -218,7 +218,7 @@ 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);           \
 }                                                                             \
@@ -458,7 +458,7 @@ 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);             \
 }                                                                             \
@@ -468,7 +468,7 @@ 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);                  \
 }                                                                             \
                                                                               \
@@ -478,7 +478,7 @@ 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);        \
 }                                                                             \