From: Timo Sirainen <tss@iki.fi>
Date: Sun, 3 Nov 2013 19:42:47 +0000 (+0200)
Subject: auth: Potential crashfix
X-Git-Tag: 2.2.7~5
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4981c1da73ffef4aff69c1af179a872bd1b68d9f;p=thirdparty%2Fdovecot%2Fcore.git

auth: Potential crashfix
---

diff --git a/src/auth/auth-request-handler.c b/src/auth/auth-request-handler.c
index 56ce379c05..1a39f5fe79 100644
--- a/src/auth/auth-request-handler.c
+++ b/src/auth/auth-request-handler.c
@@ -173,7 +173,8 @@ auth_str_append_extra_fields(struct auth_request *request, string_t *dest)
 	auth_fields_append(request->extra_fields, dest,
 			   AUTH_FIELD_FLAG_HIDDEN, 0);
 
-	if (strcmp(request->original_username, request->user) != 0) {
+	if (request->original_username != NULL &&
+	    strcmp(request->original_username, request->user) != 0) {
 		auth_str_add_keyvalue(dest, "original_user",
 				      request->original_username);
 	}