do not overflow for large prefix len (e.g. 2147483649)

report Maksymilian Arciemowicz; ok djm, deraadt

1 files changed, 3 insertions, 3 deletions

diff --git a/src/lib/libc/net/inet_net_pton.c b/src/lib/libc/net/inet_net_pton.c
index 9bb35478ca..3105c33b43 100644
--- a/src/lib/libc/net/inet_net_pton.c
+++ b/src/lib/libc/net/inet_net_pton.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: inet_net_pton.c,v 1.5 2005/08/06 20:30:03 espie Exp $ */
+/*      $OpenBSD: inet_net_pton.c,v 1.6 2008/09/01 09:40:43 markus Exp $        */
 
 /*
  * Copyright (c) 1996 by Internet Software Consortium.
@@ -142,12 +142,12 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size)
                         assert(n >= 0 && n <= 9);
                         bits *= 10;
                         bits += n;
+                        if (bits > 32)
+                                goto emsgsize;
                 } while ((ch = *src++) != '\0' &&
                          isascii(ch) && isdigit(ch));
                 if (ch != '\0')
                         goto enoent;
-                if (bits > 32)
-                        goto emsgsize;
         }
 
         /* Firey death and destruction unless we prefetched EOS. */