devnum-util: catch potential stack overruns early

2022-04-13 16:26:31 +02:00
parent ec61371fe6
commit 02b9047edf
1 changed files with 2 additions and 0 deletions
@@ -18,6 +18,8 @@ int parse_devnum(const char *s, dev_t *ret) {
        n = strspn(s, DIGITS);
        if (n == 0)
                return -EINVAL;
+        if (n > DECIMAL_STR_MAX(dev_t))
+                return -EINVAL;
        if (s[n] != ':')
                return -EINVAL;