diff options
Diffstat (limited to 'Modules')
| -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 f3b2f50..a9049ed 100644 --- a/Modules/mmapmodule.c +++ b/Modules/mmapmodule.c @@ -1116,6 +1116,11 @@ 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) { + if (offset >= st.st_size) { + PyErr_SetString(PyExc_ValueError, + "mmap offset is greater than file size"); + return NULL; + } map_size = st.st_size - offset; } else if ((size_t)offset + (size_t)map_size > st.st_size) { PyErr_SetString(PyExc_ValueError, @@ -1300,6 +1305,12 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict) else m_obj->size = low; #endif + if (offset >= m_obj->size) { + PyErr_SetString(PyExc_ValueError, + "mmap offset is greater than file size"); + Py_DECREF(m_obj); + return NULL; + } m_obj->size -= offset; } else { m_obj->size = map_size; |