[Fix] Do not crash on empty subtype

MFH: rspamd-1.6

diff --git a/src/plugins/fuzzy_check.c b/src/plugins/fuzzy_check.c
index 5df59e1fe19a0be87fad585bd902b066590f476e..61387794837ba4707e6fdbf972ea5d3908739d17 100644 (file)
--- a/src/plugins/fuzzy_check.c
+++ b/src/plugins/fuzzy_check.c
@@ -314,11 +314,17 @@ fuzzy_check_content_type (struct fuzzy_rule *rule, struct rspamd_content_type *c
        PTR_ARRAY_FOREACH (rule->mime_types, i, ft) {
                if (ft->type_re) {
 
-                       if (rspamd_regexp_match (ft->type_re, ct->type.begin, ct->type.len,
-                                       TRUE)) {
+                       if (ct->type.len > 0 &&
+                                       rspamd_regexp_match (ft->type_re,
+                                                       ct->type.begin,
+                                                       ct->type.len,
+                                                       TRUE)) {
                                if (ft->subtype_re) {
-                                       if (rspamd_regexp_match (ft->subtype_re, ct->subtype.begin,
-                                                       ct->subtype.len, TRUE)) {
+                                       if (ct->subtype.len > 0 &&
+                                                       rspamd_regexp_match (ft->subtype_re,
+                                                                       ct->subtype.begin,
+                                                                       ct->subtype.len,
+                                                                       TRUE)) {
                                                return TRUE;
                                        }
                                }