Always check asprintf return code

There is a small number of the places in sources where we don't check
asprintf() return code and assume that after error the function
returns NULL pointer via the first argument. That's wrong, after
error the content of pointer is undefined.

1 files changed, 9 insertions, 6 deletions

diff --git a/src/shared/install.c b/src/shared/install.c
index a2f84f893e..e957c33344 100644
--- a/src/shared/install.c
+++ b/src/shared/install.c
@@ -88,13 +88,16 @@ static int get_config_path(UnitFileScope scope, bool runtime, const char *root_d
 
         case UNIT_FILE_SYSTEM:
 
-                if (root_dir && runtime)
-                        asprintf(&p, "%s/run/systemd/system", root_dir);
-                else if (runtime)
+                if (root_dir && runtime) {
+                        if (asprintf(&p, "%s/run/systemd/system", root_dir) < 0)
+                                return -ENOMEM;
+                } else if (runtime)
                         p = strdup("/run/systemd/system");
-                else if (root_dir)
-                        asprintf(&p, "%s/%s", root_dir, SYSTEM_CONFIG_UNIT_PATH);
-                else
+                else if (root_dir) {
+                        if (asprintf(&p, "%s/%s", root_dir,
+                                     SYSTEM_CONFIG_UNIT_PATH) < 0)
+                                return -ENOMEM;
+                } else
                         p = strdup(SYSTEM_CONFIG_UNIT_PATH);
 
                 break;