From a24f4b8248510a30d7811906227dd0111b1c47fe Mon Sep 17 00:00:00 2001
From: "Todd C. Miller" <Todd.Miller@courtesan.com>
Date: Wed, 1 Jun 2016 14:48:31 -0600
Subject: [PATCH] Return PAM_CONV_ERR from the conversation function if getpass
 returns NULL or the user pressed ^C.

---
 plugins/sudoers/auth/pam.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/plugins/sudoers/auth/pam.c b/plugins/sudoers/auth/pam.c
index b5b2a6312..880eaeedb 100644
--- a/plugins/sudoers/auth/pam.c
+++ b/plugins/sudoers/auth/pam.c
@@ -485,6 +485,7 @@ converse(int num_msg, PAM_CONST struct pam_message **msg,
 		if (pass == NULL) {
 		    /* Error (or ^C) reading password, don't try again. */
 		    getpass_error = true;
+		    ret = PAM_CONV_ERR;
 		    goto done;
 		}
 		if (strlen(pass) >= PAM_MAX_RESP_SIZE) {