From 15912917ef8b96124bd2553d5ae851c1b113efd8 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay@vrfy.org>
Date: Thu, 7 Nov 2013 16:44:33 +0100
Subject: [PATCH] bus: message_append_basic() - allow string == NULL

---
 src/libsystemd-bus/bus-message.c      | 11 ++++++++++-
 src/libsystemd-bus/test-bus-marshal.c |  9 +++++----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/src/libsystemd-bus/bus-message.c b/src/libsystemd-bus/bus-message.c
index 9543ae3b2..4b53a6c50 100644
--- a/src/libsystemd-bus/bus-message.c
+++ b/src/libsystemd-bus/bus-message.c
@@ -1323,7 +1323,6 @@ int message_append_basic(sd_bus_message *m, char type, const void *p, const void
         int r;
 
         assert_return(m, -EINVAL);
-        assert_return(p, -EINVAL);
         assert_return(!m->sealed, -EPERM);
         assert_return(bus_type_is_basic(type), -EINVAL);
         assert_return(!m->poisoned, -ESTALE);
@@ -1380,6 +1379,11 @@ int message_append_basic(sd_bus_message *m, char type, const void *p, const void
                 break;
 
         case SD_BUS_TYPE_BOOLEAN:
+                if (!p) {
+                        r = -EINVAL;
+                        goto fail;
+                }
+
                 align = sz = 4;
 
                 assert_cc(sizeof(int) == sizeof(uint32_t));
@@ -1391,6 +1395,11 @@ int message_append_basic(sd_bus_message *m, char type, const void *p, const void
         case SD_BUS_TYPE_UNIX_FD: {
                 int z, *f;
 
+                if (!p) {
+                        r = -EINVAL;
+                        goto fail;
+                }
+
                 if (!m->allow_fds) {
                         r = -ENOTSUP;
                         goto fail;
diff --git a/src/libsystemd-bus/test-bus-marshal.c b/src/libsystemd-bus/test-bus-marshal.c
index ae61476d5..5e29a7b6a 100644
--- a/src/libsystemd-bus/test-bus-marshal.c
+++ b/src/libsystemd-bus/test-bus-marshal.c
@@ -41,7 +41,7 @@
 int main(int argc, char *argv[]) {
         _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *copy = NULL;
         int r, boolean;
-        const char *x, *y, *z, *a, *b, *c, *d;
+        const char *x, *x2, *y, *z, *a, *b, *c, *d;
         uint8_t u, v;
         void *buffer = NULL;
         size_t sz;
@@ -59,7 +59,7 @@ int main(int argc, char *argv[]) {
         assert_se(r >= 0);
 
         r = sd_bus_message_append(m, "s", NULL);
-        assert_se(r < 0);
+        assert_se(r >= 0);
 
         r = sd_bus_message_append(m, "as", 2, "string #1", "string #2");
         assert_se(r >= 0);
@@ -160,9 +160,10 @@ int main(int argc, char *argv[]) {
 
         assert_se(sd_bus_message_rewind(m, true) >= 0);
 
-        r = sd_bus_message_read(m, "sas", &x, 2, &y, &z);
+        r = sd_bus_message_read(m, "ssas", &x, &x2, 2, &y, &z);
         assert_se(r > 0);
         assert_se(streq(x, "a string"));
+        assert_se(streq(x2, ""));
         assert_se(streq(y, "string #1"));
         assert_se(streq(z, "string #2"));
 
@@ -241,7 +242,7 @@ int main(int argc, char *argv[]) {
 
         assert_se(sd_bus_message_verify_type(m, 's', NULL) > 0);
 
-        r = sd_bus_message_skip(m, "sas");
+        r = sd_bus_message_skip(m, "ssas");
         assert_se(r > 0);
 
         assert_se(sd_bus_message_verify_type(m, 's', NULL) > 0);
-- 
2.30.2