global: make sure to check service before checking service->port to prevent crashes

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/ideviceimagemounter.c b/tools/ideviceimagemounter.c
index 57a2e27..e57d83a 100644
--- a/tools/ideviceimagemounter.c
+++ b/tools/ideviceimagemounter.c
@@ -305,7 +305,7 @@ int main(int argc, char **argv)
 
         lockdownd_start_service(lckd, "com.apple.mobile.mobile_image_mounter", &service);
 
-        if (service->port == 0) {
+        if (!service || service->port == 0) {
                 printf("ERROR: Could not start mobile_image_mounter service!\n");
                 goto leave;
         }
@@ -323,7 +323,7 @@ int main(int argc, char **argv)
         if (!list_mode) {
                 struct stat fst;
                 if ((lockdownd_start_service(lckd, "com.apple.afc", &service) !=
-                         LOCKDOWN_E_SUCCESS) || !service->port) {
+                         LOCKDOWN_E_SUCCESS) || !service || !service->port) {
                         fprintf(stderr, "Could not start com.apple.afc!\n");
                         goto leave;
                 }