From 66de70164a1cd0fed59671e09bad7c2fca1d90eb Mon Sep 17 00:00:00 2001
From: Kenpachi Developer <Kenpachi.Developer@gmx.de>
Date: Sat, 9 May 2020 20:48:23 +0200
Subject: Validate length of value for permanent string variables in set_reg()
 function

---
 src/map/script.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src')

diff --git a/src/map/script.c b/src/map/script.c
index e5c407cc7..8204e5187 100644
--- a/src/map/script.c
+++ b/src/map/script.c
@@ -3465,6 +3465,18 @@ static int set_reg(struct script_state *st, struct map_session_data *sd, int64 n
 	if (is_string_variable(name)) {// string variable
 		const char *str = (const char*)value;
 
+		if (script->is_permanent_variable(name) && strlen(str) > SCRIPT_STRING_VAR_LENGTH) {
+			ShowError("script:set_reg: Value of variable %s is too long: %lu! Maximum is %d. Skipping...\n",
+				  name, strlen(str), SCRIPT_STRING_VAR_LENGTH);
+
+			if (st != NULL) {
+				script->reportsrc(st);
+				st->state = END;
+			}
+
+			return 0;
+		}
+
 		switch (prefix) {
 		case '@':
 			if (ref) {
-- 
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