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[3.11] gh-104698: Fix reference leak in mmapmodule.c (GH-104700) (#104710)

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(cherry picked from commit 99b641886a)

Co-authored-by: Kirill Podoprigora <kirill.bast9@mail.ru>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
This commit is contained in:
Miss Islington (bot) 2023-05-20 18:43:18 -07:00 • committed by GitHub
parent 2e457bc202
commit b2e0201222
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1 changed files with 19 additions and 3 deletions
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22
Modules/mmapmodule.c
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@ -235,6 +235,14 @@ do { \
return err; \
} \
} while (0)
#define CHECK_VALID_OR_RELEASE(err, buffer) \
do { \
if (self->map_handle == NULL) { \
PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \
PyBuffer_Release(&(buffer)); \
return (err); \
} \
} while (0)
#endif /* MS_WINDOWS */
#ifdef UNIX
@ -245,6 +253,14 @@ do { \
return err; \
} \
} while (0)
#define CHECK_VALID_OR_RELEASE(err, buffer) \
do { \
if (self->data == NULL) { \
PyErr_SetString(PyExc_ValueError, "mmap closed or invalid"); \
PyBuffer_Release(&(buffer)); \
return (err); \
} \
} while (0)
#endif /* UNIX */
static PyObject *
@ -334,7 +350,7 @@ mmap_gfind(mmap_object *self,
end = self->size;
Py_ssize_t res;
CHECK_VALID(NULL);
CHECK_VALID_OR_RELEASE(NULL, view);
if (reverse) {
res = _PyBytes_ReverseFind(
self->data + start, end - start,
@ -411,7 +427,7 @@ mmap_write_method(mmap_object *self,
return NULL;
}
CHECK_VALID(NULL);
CHECK_VALID_OR_RELEASE(NULL, data);
memcpy(&self->data[self->pos], data.buf, data.len);
self->pos += data.len;
PyBuffer_Release(&data);
@ -1097,7 +1113,7 @@ mmap_ass_subscript(mmap_object *self, PyObject *item, PyObject *value)
return -1;
}
CHECK_VALID(-1);
CHECK_VALID_OR_RELEASE(-1, vbuf);
if (slicelen == 0) {
}
else if (step == 1) {