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  r88022 | antoine.pitrou | 2011-01-15 17:17:07 +0100 (sam., 15 janv. 2011) | 7 lines

  Issue #10916: mmap should not segfault when a file is mapped using 0 as
  length and a non-zero offset, and an attempt to read past the end of file
  is made (IndexError is raised instead).  Patch by Ross Lagerwall.

  Requested by Georg.
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This commit is contained in:
Antoine Pitrou 2011-01-15 16:18:37 +00:00
parent 3acd3e97f2
commit fb7bc3d2f0
3 changed files with 18 additions and 1 deletions
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Modules/mmapmodule.c
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@ -1085,7 +1085,7 @@ 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) {
map_size = st.st_size;
map_size = st.st_size - offset;
} else if ((size_t)offset + (size_t)map_size > st.st_size) {
PyErr_SetString(PyExc_ValueError,
"mmap length is greater than file size");