xen/25850-tmem-xsa-15-1.patch

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# HG changeset patch
# User Ian Campbell <ian.campbell@citrix.com>
# Date 1347365190 -7200
# Node ID 0dba5a8886556f1b92e59eb19c570ad1704037f6
# Parent 90533f3b6babfda56edbbefda47c46b391204132
tmem: only allow tmem control operations from privileged domains
This is part of XSA-15 / CVE-2012-3497.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/common/tmem.c
+++ b/xen/common/tmem.c
@@ -2541,10 +2541,8 @@ static NOINLINE int do_tmem_control(stru
OID *oidp = (OID *)(&op->u.ctrl.oid[0]);
if (!tmh_current_is_privileged())
- {
- /* don't fail... mystery: sometimes dom0 fails here */
- /* return -EPERM; */
- }
+ return -EPERM;
+
switch(subop)
{
case TMEMC_THAW: