fix size check case for getgroups; pbucich@sion.com

diff --git a/sys/compat/ibcs2/ibcs2_misc.c b/sys/compat/ibcs2/ibcs2_misc.c
index 793eaba..b817aac 100644 (file)
--- a/sys/compat/ibcs2/ibcs2_misc.c
+++ b/sys/compat/ibcs2/ibcs2_misc.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ibcs2_misc.c,v 1.14 1999/02/10 00:16:11 niklas Exp $  */
+/*     $OpenBSD: ibcs2_misc.c,v 1.15 2000/03/05 20:32:13 deraadt Exp $ */
 /*     $NetBSD: ibcs2_misc.c,v 1.23 1997/01/15 01:37:49 perry Exp $    */
 
 /*
@@ -638,13 +638,15 @@ ibcs2_sys_getgroups(p, v, retval)
        }
        if ((error = sys_getgroups(p, &sa, retval)) != 0)
                return error;
-       for (i = 0, gp = SCARG(&sa, gidset); i < retval[0]; i++)
-               iset[i] = (ibcs2_gid_t)*gp++;
-       if (retval[0] && (error = copyout((caddr_t)iset,
-                                         (caddr_t)SCARG(uap, gidset),
-                                         sizeof(ibcs2_gid_t) * retval[0])))
-               return error;
-        return 0;
+       if (iset) {
+               for (i = 0, gp = SCARG(&sa, gidset); i < retval[0]; i++)
+                       iset[i] = (ibcs2_gid_t)*gp++;
+               if (retval[0] && (error = copyout((caddr_t)iset,
+                   (caddr_t)SCARG(uap, gidset),
+                   sizeof(ibcs2_gid_t) * retval[0])))
+                       return error;
+       }
+       return 0;
 }
 
 int