[Python-checkins] r88023 - in python/branches/release31-maint: Lib/test/test_mmap.py Misc/NEWS Modules/mmapmodule.c
antoine.pitrou
python-checkins at python.org
Sat Jan 15 17:18:38 CET 2011
Author: antoine.pitrou
Date: Sat Jan 15 17:18:37 2011
New Revision: 88023
Log:
Merged revisions 88022 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k
........
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.
........
Modified:
python/branches/release31-maint/ (props changed)
python/branches/release31-maint/Lib/test/test_mmap.py
python/branches/release31-maint/Misc/NEWS
python/branches/release31-maint/Modules/mmapmodule.c
Modified: python/branches/release31-maint/Lib/test/test_mmap.py
==============================================================================
--- python/branches/release31-maint/Lib/test/test_mmap.py (original)
+++ python/branches/release31-maint/Lib/test/test_mmap.py Sat Jan 15 17:18:37 2011
@@ -324,6 +324,19 @@
mf.close()
f.close()
+ def test_length_0_offset(self):
+ # Issue #10916: test mapping of remainder of file by passing 0 for
+ # map length with an offset doesn't cause a segfault.
+ if not hasattr(os, "stat"):
+ self.skipTest("needs os.stat")
+ with open(TESTFN, "wb+") as f:
+ f.write(49152 * b'm') # Arbitrary character
+
+ with open(TESTFN, "rb") as f:
+ mf = mmap.mmap(f.fileno(), 0, offset=40960, access=mmap.ACCESS_READ)
+ self.assertRaises(IndexError, mf.__getitem__, 45000)
+ mf.close()
+
def test_move(self):
# make move works everywhere (64-bit format problem earlier)
f = open(TESTFN, 'wb+')
Modified: python/branches/release31-maint/Misc/NEWS
==============================================================================
--- python/branches/release31-maint/Misc/NEWS (original)
+++ python/branches/release31-maint/Misc/NEWS Sat Jan 15 17:18:37 2011
@@ -34,6 +34,10 @@
Library
-------
+- 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.
+
- Issue #10899: No function type annotations in the standard library.
Removed function type annotations from _pyio.py.
Modified: python/branches/release31-maint/Modules/mmapmodule.c
==============================================================================
--- python/branches/release31-maint/Modules/mmapmodule.c (original)
+++ python/branches/release31-maint/Modules/mmapmodule.c Sat Jan 15 17:18:37 2011
@@ -1085,7 +1085,7 @@
# 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");
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