fix out of bounds write for zero length buffer in gethostname

3f6dc304 · Marc André Tanner · Rich Felker · 0b80a7b0 · 3f6dc304
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src/unistd/gethostname.c src/unistd/gethostname.c +1 -1

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--- a/src/unistd/gethostname.c
+++ b/src/unistd/gethostname.c
@@ -8,6 +8,6 @@ int gethostname(char *name, size_t len)
 	if (uname(&uts)) return -1;
 	if (len > sizeof uts.nodename) len = sizeof uts.nodename;
 	for (i=0; i<len && (name[i] = uts.nodename[i]); i++);
-	if (i==len) name[i-1] = 0;
+	if (i && i==len) name[i-1] = 0;
 	return 0;
 }