diff options
Diffstat (limited to 'Modules/mmapmodule.c')
| -rw-r--r-- | Modules/mmapmodule.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c index d650eae..1107eb8 100644 --- a/Modules/mmapmodule.c +++ b/Modules/mmapmodule.c @@ -1162,7 +1162,6 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) # endif if (fd != -1 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) { if (map_size == 0) { - off_t calc_size; if (st.st_size == 0) { PyErr_SetString(PyExc_ValueError, "cannot mmap an empty file"); @@ -1173,13 +1172,12 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) "mmap offset is greater than file size"); return NULL; } - calc_size = st.st_size - offset; - map_size = calc_size; - if (map_size != calc_size) { + if (st.st_size - offset > PY_SSIZE_T_MAX) { PyErr_SetString(PyExc_ValueError, "mmap length is too large"); - return NULL; - } + return NULL; + } + map_size = (Py_ssize_t) (st.st_size - offset); } else if (offset + (size_t)map_size > st.st_size) { PyErr_SetString(PyExc_ValueError, "mmap length is greater than file size"); @@ -1376,11 +1374,13 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) Py_DECREF(m_obj); return NULL; } - if (offset - size > PY_SSIZE_T_MAX) - /* Map area too large to fit in memory */ - m_obj->size = (Py_ssize_t) -1; - else - m_obj->size = (Py_ssize_t) (size - offset); + if (size - offset > PY_SSIZE_T_MAX) { + PyErr_SetString(PyExc_ValueError, + "mmap length is too large"); + Py_DECREF(m_obj); + return NULL; + } + m_obj->size = (Py_ssize_t) (size - offset); } else { m_obj->size = map_size; size = offset + map_size; |