1 files changed, 4 insertions, 1 deletions

diff --git a/src/lib/libc/net/rcmd.c b/src/lib/libc/net/rcmd.c
index ae746f5301..6e3ee93caf 100644
--- a/src/lib/libc/net/rcmd.c
+++ b/src/lib/libc/net/rcmd.c
@@ -34,7 +34,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char *rcsid = "$OpenBSD: rcmd.c,v 1.24 1997/06/29 06:02:48 deraadt Exp $";
+static char *rcsid = "$OpenBSD: rcmd.c,v 1.25 1997/07/06 07:55:58 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
@@ -422,6 +422,8 @@ __ivaliduser(hostf, raddrl, luser, ruser)
                 if (*p == '#')
                         continue;
                 while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
+                        if (!isprint(*p))
+                                goto bail;
                         *p = isupper(*p) ? tolower(*p) : *p;
                         p++;
                 }
@@ -527,6 +529,7 @@ __ivaliduser(hostf, raddrl, luser, ruser)
                 if (hostok >= 1 && userok >= 1)
                         return (0);
         }
+bail:
         return (-1);
 }