check for negative numbers from strtol()

1 files changed, 3 insertions, 3 deletions

diff --git a/src/lib/libc/net/ethers.c b/src/lib/libc/net/ethers.c
index 9df876b6f4..94ae5c996a 100644
--- a/src/lib/libc/net/ethers.c
+++ b/src/lib/libc/net/ethers.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: ethers.c,v 1.9 1998/06/21 22:13:44 millert Exp $      */
+/*      $OpenBSD: ethers.c,v 1.10 1998/11/18 23:28:54 deraadt Exp $     */
 
 /*
  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
@@ -34,7 +34,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: ethers.c,v 1.9 1998/06/21 22:13:44 millert Exp $";
+static char rcsid[] = "$OpenBSD: ethers.c,v 1.10 1998/11/18 23:28:54 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
@@ -92,7 +92,7 @@ _ether_aton(s, e)
         /* expect 6 hex octets separated by ':' or space/NUL if last octet */
         for (i = 0; i < 6; i++) {
                 l = strtol(s, &pp, 16);
-                if (pp == s || l > 0xFF)
+                if (pp == s || l > 0xFF || l < 0)
                         return (NULL);
                 if (!(*pp == ':' || (i == 5 && (isspace(*pp) || *pp == '\0'))))
                         return (NULL);