Don't try to dereference a NULL pw pointer. This would happen when

attempting to use chpass -a.

diff --git a/chpass/chpass.c b/chpass/chpass.c
index 22ca2ac7d1301ad6340e01189a1c7cbc13728de5..ba8baaa6aaec44bca3bb244d54f7e29726278c1c 100644 (file)
--- a/chpass/chpass.c
+++ b/chpass/chpass.c
@@ -166,7 +166,7 @@ main(int argc, char *argv[])
        }
 
 #ifdef YP
-       if ((pw->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
+       if (pw != NULL && (pw->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
                ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host);
                master_mode = (ypclnt != NULL &&
                    ypclnt_connect(ypclnt) != -1 &&