Address side effect of accessing a variable via an index: Filters
accessing a variable where an element is accessed that is beyond the
size of the list (for example $TEST[10] and only 2 elements are available)
cannot instantiate that filter. Test for this and report proper error
to user.
---
src/conf/nwfilter_params.c | 29 +++++++++++++++++++++++++++++
src/conf/nwfilter_params.h | 3 ++-
src/libvirt_private.syms | 2 ++
src/nwfilter/nwfilter_gentech_driver.c | 23 ++++++++++++++++++-----
4 files changed, 51 insertions(+), 6 deletions(-)
Index: libvirt-iterator/src/conf/nwfilter_params.h
===================================================================
--- libvirt-iterator.orig/src/conf/nwfilter_params.h
+++ libvirt-iterator/src/conf/nwfilter_params.h
@@ -125,7 +125,8 @@ enum virNWFilterVarAccessType virNWFilte
const virNWFilterVarAccessPtr vap);
unsigned int virNWFilterVarAccessGetIterId(const virNWFilterVarAccessPtr vap);
unsigned int virNWFilterVarAccessGetIndex(const virNWFilterVarAccessPtr vap);
-
+bool virNWFilterVarAccessIsAvailable(const virNWFilterVarAccessPtr vap,
+ const virNWFilterHashTablePtr hash);
typedef struct _virNWFilterVarCombIterEntry virNWFilterVarCombIterEntry;
typedef virNWFilterVarCombIterEntry *virNWFilterVarCombIterEntryPtr;
Index: libvirt-iterator/src/nwfilter/nwfilter_gentech_driver.c
===================================================================
--- libvirt-iterator.orig/src/nwfilter/nwfilter_gentech_driver.c
+++ libvirt-iterator/src/nwfilter/nwfilter_gentech_driver.c
@@ -501,16 +501,29 @@ virNWFilterDetermineMissingVarsRec(virNW
if (rule) {
/* check all variables of this rule */
for (j = 0; j < rule->nVarAccess; j++) {
- const char *varName;
- varName = virNWFilterVarAccessGetVarName(rule->varAccess[j]);
- if (!virHashLookup(vars->hashTable, varName)) {
+ if (!virNWFilterVarAccessIsAvailable(rule->varAccess[j],
+ vars)) {
+ const char *varAccess;
+ virBuffer buf = VIR_BUFFER_INITIALIZER;
+
+ virNWFilterVarAccessPrint(rule->varAccess[j], &buf);
+ if (virBufferError(&buf)) {
+ virReportOOMError();
+ rc = -1;
+ break;
+ }
+
val = virNWFilterVarValueCreateSimpleCopyValue("1");
if (!val) {
+ virBufferFreeAndReset(&buf);
rc = -1;
break;
}
- virNWFilterHashTablePut(missing_vars, varName,
+
+ varAccess = virBufferContentAndReset(&buf);
+ virNWFilterHashTablePut(missing_vars, varAccess,
val, 1);
+ VIR_FREE(varAccess);
}
}
if (rc)
@@ -752,7 +765,7 @@ err_unresolvable_vars:
if (buf) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot instantiate filter due to unresolvable "
- "variables: %s"), buf);
+ "variables or unavailable list elements: %s"), buf);
VIR_FREE(buf);
}
Index: libvirt-iterator/src/conf/nwfilter_params.c
===================================================================
--- libvirt-iterator.orig/src/conf/nwfilter_params.c
+++ libvirt-iterator/src/conf/nwfilter_params.c
@@ -1072,3 +1072,32 @@ virNWFilterVarAccessGetIntIterId(const v
{
return vap->u.index.intIterId;
}
+
+bool
+virNWFilterVarAccessIsAvailable(const virNWFilterVarAccessPtr varAccess,
+ const virNWFilterHashTablePtr hash)
+{
+ const char *varName = virNWFilterVarAccessGetVarName(varAccess);
+ const char *res;
+ unsigned int idx;
+ virNWFilterVarValuePtr varValue;
+
+ varValue = virHashLookup(hash->hashTable, varName);
+ if (!varValue)
+ return false;
+
+ switch (virNWFilterVarAccessGetType(varAccess)) {
+ case VIR_NWFILTER_VAR_ACCESS_ELEMENT:
+ idx = virNWFilterVarAccessGetIndex(varAccess);
+ res = virNWFilterVarValueGetNthValue(varValue, idx);
+ if (res == NULL)
+ return false;
+ break;
+ case VIR_NWFILTER_VAR_ACCESS_ITERATOR:
+ break;
+ case VIR_NWFILTER_VAR_ACCESS_LAST:
+ return false;
+ }
+
+ return true;
+}
Index: libvirt-iterator/src/libvirt_private.syms
===================================================================
--- libvirt-iterator.orig/src/libvirt_private.syms
+++ libvirt-iterator/src/libvirt_private.syms
@@ -833,6 +833,8 @@ virNWFilterHashTablePut;
virNWFilterHashTablePutAll;
virNWFilterHashTableRemoveEntry;
virNWFilterVarAccessGetVarName;
+virNWFilterVarAccessIsAvailable;
+virNWFilterVarAccessPrint;
virNWFilterVarCombIterCreate;
virNWFilterVarCombIterFree;
virNWFilterVarCombIterGetVarValue;
--
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