diff options
Diffstat (limited to 'Modules/mmapmodule.c')
| -rw-r--r-- | Modules/mmapmodule.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c index f52dce5..d650eae 100644 --- a/Modules/mmapmodule.c +++ b/Modules/mmapmodule.c @@ -1163,6 +1163,11 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) 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"); + return NULL; + } if (offset >= st.st_size) { PyErr_SetString(PyExc_ValueError, "mmap offset is greater than file size"); @@ -1359,6 +1364,12 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) } size = (((PY_LONG_LONG) high) << 32) + low; + if (size == 0) { + PyErr_SetString(PyExc_ValueError, + "cannot mmap an empty file"); + Py_DECREF(m_obj); + return NULL; + } if (offset >= size) { PyErr_SetString(PyExc_ValueError, "mmap offset is greater than file size"); |