upas: fix nil pointer dereference
R=rsc
https://codereview.appspot.com/92650043
diff --git a/src/cmd/upas/smtp/smtp.c b/src/cmd/upas/smtp/smtp.c
index 62ef865..9dd0559 100644
--- a/src/cmd/upas/smtp/smtp.c
+++ b/src/cmd/upas/smtp/smtp.c
@@ -229,7 +229,7 @@
for(i = 0; i < argc; i++){
if((trv = rcptto(argv[i])) != 0){
/* remember worst error */
- if(strcmp(rv, Giveup) != 0)
+ if(rv != nil && strcmp(rv, Giveup) != 0)
rv = trv;
errs[rcvrs] = strdup(s_to_c(reply));
removenewline(errs[rcvrs]);
@@ -241,7 +241,7 @@
}
/* if no ok rcvrs or worst error is retry, give up */
- if(ok == 0 || strcmp(rv, Retry) == 0)
+ if(ok == 0 || (rv != nil && strcmp(rv, Retry) == 0))
goto error;
if(ping){
