From cfdea3894f809aada2cf10ba2914aebe8b92316d Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 20 Jan 2009 14:17:29 +0100
Subject: [PATCH] fix signed vs unsigned char validation bug

---
 util.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/util.c b/util.c
index e56992e..cb88968 100644
--- a/util.c
+++ b/util.c
@@ -86,7 +86,7 @@ __plugin bool uci_validate_str(const char *str, bool name)
 		return false;
 
 	while (*str) {
-		char c = *str;
+		unsigned char c = *str;
 		if (!isalnum(c) && c != '_') {
 			if (name || (c < 33) || (c > 126))
 				return false;
@@ -114,8 +114,9 @@ static inline bool uci_validate_name(const char *str)
 bool uci_validate_text(const char *str)
 {
 	while (*str) {
-		if ((*str == '\r') || (*str == '\n') ||
-			((*str < 32) && (*str != '\t')))
+		unsigned char c = *str;
+		if ((c == '\r') || (c == '\n') ||
+			((c < 32) && (c != '\t')))
 			return false;
 		str++;
 	}
-- 
2.11.0