File b598ac55-CVE-2011-2178.patch of Package libvirt.import4836

commit b598ac555c8fe67ffc39ac8ef25fe7e6b28ae3f2
Author: Eric Blake <eblake@redhat.com>
Date:   Thu May 26 08:18:46 2011 -0600

    security: plug regression introduced in disk probe logic
    
    Regression introduced in commit d6623003 (v0.8.8) - using the
    wrong sizeof operand meant that security manager private data
    was overlaying the allowDiskFormatProbing member of struct
    _virSecurityManager.  This reopens disk probing, which was
    supposed to be prevented by the solution to CVE-2010-2238.
    
    * src/security/security_manager.c
    (virSecurityManagerGetPrivateData): Use correct offset.

diff --git a/src/security/security_manager.c b/src/security/security_manager.c
index 0246dd8..6f0becd 100644
--- a/src/security/security_manager.c
+++ b/src/security/security_manager.c
@@ -107,7 +107,9 @@ virSecurityManagerPtr virSecurityManagerNew(const char *name,
 
 void *virSecurityManagerGetPrivateData(virSecurityManagerPtr mgr)
 {
-    return ((char*)mgr) + sizeof(mgr);
+    /* This accesses the memory just beyond mgr, which was allocated
+     * via VIR_ALLOC_VAR earlier.  */
+    return mgr + 1;
 }