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[3.14] gh-141370: Fix undefined behavior when using Py_ABS() (GH-141548) (GH-142301)

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(cherry picked from commit 706fdda8b3)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>
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Miss Islington (bot) 2025-12-12 16:11:43 +01:00 • committed by GitHub
parent 5e425c3f96
commit ebeb07f132
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6 changed files with 43 additions and 3 deletions
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2
Python/marshal.c
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@ -310,7 +310,7 @@ w_PyLong(const PyLongObject *ob, char flag, WFILE *p)
}
if (!long_export.digits) {
int8_t sign = long_export.value < 0 ? -1 : 1;
uint64_t abs_value = Py_ABS(long_export.value);
uint64_t abs_value = _Py_ABS_CAST(uint64_t, long_export.value);
uint64_t d = abs_value;
long l = 0;

3
Python/pystrhex.c
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@ -42,8 +42,7 @@ static PyObject *_Py_strhex_impl(const char* argbuf, const Py_ssize_t arglen,
else {
bytes_per_sep_group = 0;
}
unsigned int abs_bytes_per_sep = Py_ABS(bytes_per_sep_group);
unsigned int abs_bytes_per_sep = _Py_ABS_CAST(unsigned int, bytes_per_sep_group);
Py_ssize_t resultlen = 0;
if (bytes_per_sep_group && arglen > 0) {
/* How many sep characters we'll be inserting. */