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| author | Jesus Cea <jcea@jcea.es> | 2012-09-09 22:27:55 (GMT) |
|---|---|---|
| committer | Jesus Cea <jcea@jcea.es> | 2012-09-09 22:27:55 (GMT) |
| commit | 941bfcc537a25077e2a73ddf8d8b3bfe288c81f4 (patch) | |
| tree | aecc62becfac5c8a9592e021e60be2f3ec862620 /Modules | |
| parent | 7330da42978ffcde525295ffc928ee3e0eedfb1b (diff) | |
| download | cpython-941bfcc537a25077e2a73ddf8d8b3bfe288c81f4.zip cpython-941bfcc537a25077e2a73ddf8d8b3bfe288c81f4.tar.gz cpython-941bfcc537a25077e2a73ddf8d8b3bfe288c81f4.tar.bz2 | |
Closes #15676: mmap: add empty file check prior to offset check
Diffstat (limited to 'Modules')
| -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 da9283b..e23613e 100644 --- a/Modules/mmapmodule.c +++ b/Modules/mmapmodule.c @@ -1141,6 +1141,11 @@ 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"); |