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Avoid additional operator invokation if last transform of a multimatch doesn't modify the input

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Fixes #1086
This commit is contained in:
Daniel Stelter-Gliese
2016-03-02 11:00:40 +01:00
committed by Felipe Zimmerle
parent 9ac9ff8223
commit 72f632e9b6
2 changed files with 8 additions and 2 deletions
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7
apache2/re.c
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@@ -2872,7 +2872,10 @@ static apr_status_t msre_rule_process_normal(msre_rule *rule, modsec_rec *msr) {
arr = apr_table_elts(tartab);
te = (apr_table_entry_t *)arr->elts;
for (i = 0; i < arr->nelts; i++) {
/* Variable was modified by *any* transformation */
int changed;
/* Variable was modified by *last applied* transformation (needed by multimatch) */
int tfnchanged;
int usecache = 0;
apr_table_t *cachetab = NULL;
apr_time_t time_before_trans = 0;
@@ -2995,8 +2998,8 @@ static apr_status_t msre_rule_process_normal(msre_rule *rule, modsec_rec *msr) {
apr_table_t *normtab;
const char *lastvarval = NULL;
apr_size_t lastvarlen = 0;
int tfnchanged = 0;
tfnchanged = 0;
changed = 0;
normtab = apr_table_make(mptmp, 10);
if (normtab == NULL) return -1;
@@ -3278,7 +3281,7 @@ static apr_status_t msre_rule_process_normal(msre_rule *rule, modsec_rec *msr) {
* or if it is and we need to process the result of the
* last transformation.
*/
if (!multi_match || changed) {
if (!multi_match || tfnchanged) {
invocations++;
#if defined(PERFORMANCE_MEASUREMENT)