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changeset 79063:2bdc8c8ea42e

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Issue #15977: Fix memory leak in Modules/_ssl.c when the function _set_npn_protocols() is called multiple times
author Christian Heimes <christian@cheimes.de>
date Thu, 20 Sep 2012 12:42:54 +0200
parents c6892ce7e56f
children dcced3bd22fe
files Misc/NEWS Modules/_ssl.c
diffstat 2 files changed, 10 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/Misc/NEWS	Mon Sep 17 09:01:03 2012 +0200
+++ b/Misc/NEWS	Thu Sep 20 12:42:54 2012 +0200
@@ -68,6 +68,9 @@
 Extension Modules
 -----------------
 
+- Issue #15977: Fix memory leak in Modules/_ssl.c when the function
+  _set_npn_protocols() is called multiple times, thanks to Daniel Sommermann.
+
 Tests
 -----
 
--- a/Modules/_ssl.c	Mon Sep 17 09:01:03 2012 +0200
+++ b/Modules/_ssl.c	Thu Sep 20 12:42:54 2012 +0200
@@ -1713,6 +1713,9 @@
         return NULL;
     }
     self->ctx = ctx;
+#ifdef OPENSSL_NPN_NEGOTIATED
+    self->npn_protocols = NULL;
+#endif
     /* Defaults */
     SSL_CTX_set_verify(self->ctx, SSL_VERIFY_NONE, NULL);
     SSL_CTX_set_options(self->ctx,
@@ -1812,6 +1815,10 @@
     if (!PyArg_ParseTuple(args, "y*:set_npn_protocols", &protos))
         return NULL;
 
+    if (self->npn_protocols != NULL) {
+        PyMem_Free(self->npn_protocols);
+    }
+
     self->npn_protocols = PyMem_Malloc(protos.len);
     if (self->npn_protocols == NULL) {
         PyBuffer_Release(&protos);