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Fix potential NULL pointer dereferences in regexp code

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https://bugzilla.gnome.org/show_bug.cgi?id=707749

Fix 3 cases where we might dereference NULL
This commit is contained in:
Gaurav 2013-09-11 14:59:06 +08:00 committed by Daniel Veillard
parent 2205ff4b0d
commit 2671b013d8
1 changed files with 5 additions and 3 deletions
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8
xmlregexp.c
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@ -3162,8 +3162,10 @@ xmlFARegExecRollBack(xmlRegExecCtxtPtr exec) {
exec->status = -6;
return;
}
memcpy(exec->counts, exec->rollbacks[exec->nbRollbacks].counts,
if (exec->counts) {
memcpy(exec->counts, exec->rollbacks[exec->nbRollbacks].counts,
exec->comp->nbCounters * sizeof(int));
}
}
#ifdef DEBUG_REGEXP_EXEC
@ -4091,7 +4093,7 @@ rollback:
*/
exec->determinist = 0;
xmlFARegExecRollBack(exec);
if (exec->status == 0) {
if ((exec->inputStack != NULL ) && (exec->status == 0)) {
value = exec->inputStack[exec->index].value;
data = exec->inputStack[exec->index].data;
#ifdef DEBUG_PUSH
@ -4306,7 +4308,7 @@ xmlRegExecGetValues(xmlRegExecCtxtPtr exec, int err,
(*nbval)++;
}
} else {
if ((exec->comp->states[trans->to] != NULL) &&
if ((exec->comp != NULL) && (exec->comp->states[trans->to] != NULL) &&
(exec->comp->states[trans->to]->type !=
XML_REGEXP_SINK_STATE)) {
if (atom->neg)