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| author | Jesus Cea <jcea@jcea.es> | 2012-09-10 20:50:21 (GMT) |
|---|---|---|
| committer | Jesus Cea <jcea@jcea.es> | 2012-09-10 20:50:21 (GMT) |
| commit | 4886d5b3385800cb302336b1ec3153833345226e (patch) | |
| tree | bfa0fc5e526e007751f68c560d8adb8f7e2bd3f5 /Modules/mmapmodule.c | |
| parent | 7b9c48f3398468b28d6659844e0e9c0c8e9771fa (diff) | |
| parent | 1f2799bef45673419e96ad4ef6a923c59d1c6a85 (diff) | |
| download | cpython-4886d5b3385800cb302336b1ec3153833345226e.zip cpython-4886d5b3385800cb302336b1ec3153833345226e.tar.gz cpython-4886d5b3385800cb302336b1ec3153833345226e.tar.bz2 | |
#15676: mmap: add empty file check prior to offset check <- Previous patch was incomplete
Diffstat (limited to 'Modules/mmapmodule.c')
| -rw-r--r-- | Modules/mmapmodule.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c index 0f22d49..3e20934 100644 --- a/Modules/mmapmodule.c +++ b/Modules/mmapmodule.c @@ -1364,6 +1364,11 @@ 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"); + return NULL; + } if (offset >= size) { PyErr_SetString(PyExc_ValueError, "mmap offset is greater than file size"); |