From: Peter Krempa <pkrempa@redhat.com>
Date: Mon, 6 Jan 2014 13:11:42 +0000 (+0100)
Subject: qemu: Clean up qemuDomainSetNumaParameters
X-Git-Tag: CVE-2013-6458-1~16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8b573a6b0d1ee9d99862104f28fee8bc7f949a9d;p=thirdparty%2Flibvirt.git

qemu: Clean up qemuDomainSetNumaParameters

Add whitespace to separate logical code blocks, reformat error messages
and clean up code flow.

This patch changes error handling in some cases where the the loop would
be continued to jump to cleanup instead and error out rather than modify
the domain any further.
---

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 45d11cdce7..819ad7f2a5 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -8237,6 +8237,7 @@ qemuDomainSetNumaParameters(virDomainPtr dom,
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
+
     if (virTypedParamsValidate(params, nparams,
                                VIR_DOMAIN_NUMA_MODE,
                                VIR_TYPED_PARAM_INT,
@@ -8263,43 +8264,40 @@ qemuDomainSetNumaParameters(virDomainPtr dom,
 
     if (flags & VIR_DOMAIN_AFFECT_LIVE) {
         if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET)) {
-            virReportError(VIR_ERR_OPERATION_INVALID,
-                           "%s", _("cgroup cpuset controller is not mounted"));
+            virReportError(VIR_ERR_OPERATION_INVALID, "%s",
+                           _("cgroup cpuset controller is not mounted"));
             goto cleanup;
         }
     }
 
-    ret = 0;
     for (i = 0; i < nparams; i++) {
         virTypedParameterPtr param = &params[i];
 
         if (STREQ(param->field, VIR_DOMAIN_NUMA_MODE)) {
+            int mode = param->value.i;
+
             if ((flags & VIR_DOMAIN_AFFECT_LIVE) &&
-                vm->def->numatune.memory.mode != params[i].value.i) {
+                vm->def->numatune.memory.mode != mode) {
                 virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                                _("can't change numa mode for running domain"));
-                ret = -1;
                 goto cleanup;
             }
 
-            if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
-                persistentDef->numatune.memory.mode = params[i].value.i;
-            }
+            if (flags & VIR_DOMAIN_AFFECT_CONFIG)
+                persistentDef->numatune.memory.mode = mode;
+
         } else if (STREQ(param->field, VIR_DOMAIN_NUMA_NODESET)) {
             virBitmapPtr nodeset = NULL;
 
-            if (virBitmapParse(params[i].value.s,
-                               0, &nodeset,
+            if (virBitmapParse(param->value.s, 0, &nodeset,
                                VIR_DOMAIN_CPUMASK_LEN) < 0) {
-                ret = -1;
-                continue;
+                goto cleanup;
             }
 
             if (flags & VIR_DOMAIN_AFFECT_LIVE) {
                 if (qemuDomainSetNumaParamsLive(vm, caps, nodeset) < 0) {
                     virBitmapFree(nodeset);
-                    ret = -1;
-                    continue;
+                    goto cleanup;
                 }
 
                 /* update vm->def here so that dumpxml can read the new
@@ -8328,9 +8326,11 @@ qemuDomainSetNumaParameters(virDomainPtr dom,
             persistentDef->numatune.memory.placement_mode =
                 VIR_NUMA_TUNE_MEM_PLACEMENT_MODE_AUTO;
         if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
-            ret = -1;
+            goto cleanup;
     }
 
+    ret = 0;
+
 cleanup:
     if (vm)
         virObjectUnlock(vm);