From: nurelin <nurelin@nurelin.eu>
Date: Thu, 21 Sep 2017 06:08:20 +0000 (+0200)
Subject: bpo-31532: Fix memory corruption due to allocator mix (#3679)
X-Git-Tag: v3.7.0a2~144
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3d1e2ab584ed0175592b5be2a0bc98dc1723776a;p=python

bpo-31532: Fix memory corruption due to allocator mix (#3679)

Fix a memory corruption in getpath.c due to mixed memory allocators
between Py_GetPath() and Py_SetPath().

The fix use the Raw allocator to mimic the windows version.

This patch should be used from python3.6 to the current version

for more details, see the bug report and
  https://github.com/pyinstaller/pyinstaller/issues/2812
---

diff --git a/Misc/NEWS.d/next/C API/2017-09-20-21-59-52.bpo-31532.s9Cw9_.rst b/Misc/NEWS.d/next/C API/2017-09-20-21-59-52.bpo-31532.s9Cw9_.rst
new file mode 100644
index 0000000000..7451986846
--- /dev/null
+++ b/Misc/NEWS.d/next/C API/2017-09-20-21-59-52.bpo-31532.s9Cw9_.rst	
@@ -0,0 +1,2 @@
+Fix memory corruption due to allocator mix in getpath.c between Py_GetPath()
+and Py_SetPath()
diff --git a/Modules/getpath.c b/Modules/getpath.c
index 0f916436c5..dd3387a9d7 100644
--- a/Modules/getpath.c
+++ b/Modules/getpath.c
@@ -735,7 +735,7 @@ calculate_path(void)
     bufsz += wcslen(zip_path) + 1;
     bufsz += wcslen(exec_prefix) + 1;
 
-    buf = PyMem_New(wchar_t, bufsz);
+    buf = PyMem_RawMalloc(bufsz * sizeof(wchar_t));
     if (buf == NULL) {
         Py_FatalError(
             "Not enough memory for dynamic PYTHONPATH");