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| author | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-09-27 16:01:31 +0200 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-10-04 18:01:01 +0200 |
| commit | 8a61f66381e459d6b33334fb104a09e55d051b58 (patch) | |
| tree | 4a11818232c4d7f714ef4a956069ba48e340ebd6 /libavcodec/cavsdsp.c | |
| parent | 22e7e4e19d4a874edcbbf03dcde07cf44af3f783 (diff) | |
| download | ffmpeg-8a61f66381e459d6b33334fb104a09e55d051b58.tar.gz | |
avocdec/cavsdsp: Fix undefined pointer arithmetic
src2 is used in CAVS_SUBPIX_HV iff FULL is true (it is exactly
for the egpr functions); otherwise it might be NULL. So check
for FULL before doing pointer arithmetic.
Fixes a "src/libavcodec/cavsdsp.c:524:1: runtime error: applying
non-zero offset 8 to null pointer" from UBSan.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavcodec/cavsdsp.c')
| -rw-r--r-- | libavcodec/cavsdsp.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/libavcodec/cavsdsp.c b/libavcodec/cavsdsp.c index af46eaf8d2..69420242d6 100644 --- a/libavcodec/cavsdsp.c +++ b/libavcodec/cavsdsp.c @@ -425,13 +425,14 @@ static void OPNAME ## cavs_filt8_hv_ ## NAME(uint8_t *dst, const uint8_t *src1, \ static void OPNAME ## cavs_filt16_hv_ ## NAME(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, ptrdiff_t dstStride, ptrdiff_t srcStride)\ { \ - OPNAME ## cavs_filt8_hv_ ## NAME(dst , src1, src2 , dstStride, srcStride); \ - OPNAME ## cavs_filt8_hv_ ## NAME(dst+8, src1+8, src2+8, dstStride, srcStride); \ + OPNAME ## cavs_filt8_hv_ ## NAME(dst , src1, FULL ? src2 : NULL, dstStride, srcStride); \ + OPNAME ## cavs_filt8_hv_ ## NAME(dst+8, src1+8, FULL ? src2 + 8 : NULL, dstStride, srcStride); \ src1 += 8*srcStride;\ - src2 += 8*srcStride;\ + if (FULL) \ + src2 += 8*srcStride;\ dst += 8*dstStride;\ - OPNAME ## cavs_filt8_hv_ ## NAME(dst , src1, src2 , dstStride, srcStride); \ - OPNAME ## cavs_filt8_hv_ ## NAME(dst+8, src1+8, src2+8, dstStride, srcStride); \ + OPNAME ## cavs_filt8_hv_ ## NAME(dst , src1, FULL ? src2 : NULL, dstStride, srcStride); \ + OPNAME ## cavs_filt8_hv_ ## NAME(dst+8, src1+8, FULL ? src2 + 8 : NULL, dstStride, srcStride); \ }\ #define CAVS_MC(OPNAME, SIZE) \ @@ -492,22 +493,22 @@ static void OPNAME ## cavs_qpel ## SIZE ## _mc33_c(uint8_t *dst, const uint8_t * \ static void OPNAME ## cavs_qpel ## SIZE ## _mc21_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\ {\ - OPNAME ## cavs_filt ## SIZE ## _hv_ff(dst, src, src+stride+1,stride, stride); \ + OPNAME ## cavs_filt ## SIZE ## _hv_ff(dst, src, NULL, stride, stride); \ }\ \ static void OPNAME ## cavs_qpel ## SIZE ## _mc12_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\ {\ - OPNAME ## cavs_filt ## SIZE ## _hv_ii(dst, src, src+stride+1,stride, stride); \ + OPNAME ## cavs_filt ## SIZE ## _hv_ii(dst, src, NULL, stride, stride); \ }\ \ static void OPNAME ## cavs_qpel ## SIZE ## _mc32_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\ {\ - OPNAME ## cavs_filt ## SIZE ## _hv_kk(dst, src, src+stride+1,stride, stride); \ + OPNAME ## cavs_filt ## SIZE ## _hv_kk(dst, src, NULL, stride, stride); \ }\ \ static void OPNAME ## cavs_qpel ## SIZE ## _mc23_c(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)\ {\ - OPNAME ## cavs_filt ## SIZE ## _hv_qq(dst, src, src+stride+1,stride, stride); \ + OPNAME ## cavs_filt ## SIZE ## _hv_qq(dst, src, NULL, stride, stride); \ }\ #define op_put1(a, b) a = cm[((b)+4)>>3] |