Prevent overflow beyond the end of string in wtf_strwidth()

Bug-Debian: https://github.com/tats/w3m/issues/57
2016-12-08 01:00:42 +09:00
parent 295b1ef8f8
commit a56a8ef132
1 changed files with 2 additions and 1 deletions
--- a/libwc/wtf.c
+++ b/libwc/wtf.c
@@ -120,8 +120,9 @@ int
 wtf_strwidth(wc_uchar *p)
 {
    int w = 0;
+    wc_uchar *q = p + strlen(p);

-    while (*p) {
+    while (p < q) {
 	w += wtf_width(p);
 	p += WTF_LEN_MAP[*p];
    }