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avcodec/vp9dsp_template: Fix integer overflows in itxfm_wrapper 

Fixes: signed integer overflow: 2147483641 + 32 cannot be represented in type 'int'
Fixes: 27452/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VP9_fuzzer-5078752576667648

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-11-22 17:55:12 +01:00
parent 3d7ee5c91a
commit 4dfb7ff528
1 changed files with 2 additions and 2 deletions
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4
libavcodec/vp9dsp_template.c
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@ -1138,7 +1138,7 @@ static void type_a##_##type_b##_##sz##x##sz##_add_c(uint8_t *_dst, \
for (j = 0; j < sz; j++) \
dst[j * stride] = av_clip_pixel(dst[j * stride] + \
(bits ? \
(t + (1 << (bits - 1))) >> bits : \
(int)(t + (1U << (bits - 1))) >> bits : \
t)); \
dst++; \
} \
@ -1153,7 +1153,7 @@ static void type_a##_##type_b##_##sz##x##sz##_add_c(uint8_t *_dst, \
for (j = 0; j < sz; j++) \
dst[j * stride] = av_clip_pixel(dst[j * stride] + \
(bits ? \
(out[j] + (1 << (bits - 1))) >> bits : \
(int)(out[j] + (1U << (bits - 1))) >> bits : \
out[j])); \
dst++; \
} \