From: Ian Jackson <Ian.Jackson@eu.citrix.com>
Date: Tue, 22 Jun 2010 15:00:08 +0000 (+0100)
Subject: python/xc: do not crash xend if /proc/xen/privcmd cannot be opened
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~11889^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b9ae83b6e2a50a21a6fe16273218e3403d053fc7;p=xen.git

python/xc: do not crash xend if /proc/xen/privcmd cannot be opened

If /proc/xen/privcmd cannot be opened,
start xend occurs Segmentation fault.
Add check to fix it.

Signed-off-by: Yu Zhiguo <yuzg@cn.fujitsu.com>
---

diff --git a/tools/python/xen/lowlevel/xc/xc.c b/tools/python/xen/lowlevel/xc/xc.c
index a7286c4e85..13704249b5 100644
--- a/tools/python/xen/lowlevel/xc/xc.c
+++ b/tools/python/xen/lowlevel/xc/xc.c
@@ -72,7 +72,8 @@ static PyObject *pyxc_error_to_exception(xc_interface *xch)
     else
         pyerr = Py_BuildValue("(is)", err->code, desc);
 
-    xc_clear_last_error(xch);
+    if (xch)
+        xc_clear_last_error(xch);
 
     if ( pyerr != NULL )
     {