1 files changed, 6 insertions, 3 deletions

diff --git a/util-linux/fdisk.c b/util-linux/fdisk.c
index c226d6a00..2f87f1c60 100644
--- a/util-linux/fdisk.c
+++ b/util-linux/fdisk.c
@@ -330,13 +330,16 @@ read_maybe_empty(const char *mesg)
 static int
 read_hex(const struct systypes *sys)
 {
+        unsigned long v;
         while (1) {
                 read_nonempty(_("Hex code (type L to list codes): "));
-                if (*line_ptr == 'l' || *line_ptr == 'L')
+                if (*line_ptr == 'l' || *line_ptr == 'L') {
                         list_types(sys);
-                else if (isxdigit(*line_ptr)) {
-                        return strtoul(line_ptr, NULL, 16);
+                        continue;
                 }
+                v = bb_strtoul(line_ptr, NULL, 16);
+                if (errno || v > 0xff) continue;
+                return v;
         }
 }
 #endif /* CONFIG_FEATURE_FDISK_WRITABLE */