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avutil/tx_priv: Use unsigned in BF() to avoid signed overflows

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Fixes: signed integer overflow: 100183269 - -2132769113 cannot be represented in type 'int'
Fixes: 55063/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-5039294027005952

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 2023-01-22 00:51:05 +01:00
parent 014c02d43b
commit eddf7e2a3e
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GPG Key ID: B18E8928B3948D64
1 changed files with 10 additions and 4 deletions
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14
libavutil/tx_priv.h
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@ -102,6 +102,12 @@ typedef void TXComplex;
#define FOLD(a, b) ((a) + (b))
#define BF(x, y, a, b) \
do { \
x = (a) - (b); \
y = (a) + (b); \
} while (0)
#elif defined(TX_INT32)
/* Properly rounds the result */
@ -132,14 +138,14 @@ typedef void TXComplex;
#define FOLD(x, y) ((int32_t)((x) + (unsigned)(y) + 32) >> 6)
#endif /* TX_INT32 */
#define BF(x, y, a, b) \
do { \
x = (a) - (b); \
y = (a) + (b); \
x = (a) - (unsigned)(b); \
y = (a) + (unsigned)(b); \
} while (0)
#endif /* TX_INT32 */
#define CMUL3(c, a, b) CMUL((c).re, (c).im, (a).re, (a).im, (b).re, (b).im)
/* Codelet flags, used to pick codelets. Must be a superset of enum AVTXFlags,