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| author | Jesus Cea <jcea@jcea.es> | 2012-09-09 22:22:39 (GMT) |
|---|---|---|
| committer | Jesus Cea <jcea@jcea.es> | 2012-09-09 22:22:39 (GMT) |
| commit | 8b54d6d73312186b4736cdf69a4e2e46ba15784c (patch) | |
| tree | 82b6af0a0544635996bf5c899c6d58036816b1a8 /Modules/mmapmodule.c | |
| parent | 10fc104fede2449468fb9488bb44a9663382b3a8 (diff) | |
| download | cpython-8b54d6d73312186b4736cdf69a4e2e46ba15784c.zip cpython-8b54d6d73312186b4736cdf69a4e2e46ba15784c.tar.gz cpython-8b54d6d73312186b4736cdf69a4e2e46ba15784c.tar.bz2 | |
Closes #15676: mmap: add empty file check prior to offset check
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 a5027f5..8cf0e87 100644 --- a/Modules/mmapmodule.c +++ b/Modules/mmapmodule.c @@ -1189,6 +1189,11 @@ 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"); |