android: Fix NULL pointer dereference

If there is no adapter, hal_ipc in not initialized. Below is
message from valgrind:

==22501== Invalid read of size 4
==22501==    at 0x805B809: ipc_unregister (ipc.c:421)
==22501==    by 0x804AEAF: main (main.c:548)
==22501==  Address 0x4 is not stack'd, malloc'd or (recently) free'd

diff --git a/android/main.c b/android/main.c
index 828f81d..e229a6d 100644 (file)
--- a/android/main.c
+++ b/android/main.c
@@ -541,8 +541,11 @@ int main(int argc, char *argv[])
        bt_bluetooth_cleanup();
        g_main_loop_unref(event_loop);
 
-       ipc_unregister(hal_ipc, HAL_SERVICE_ID_CORE);
-       ipc_cleanup(hal_ipc);
+       /* If no adapter was initialized, hal_ipc is NULL */
+       if (hal_ipc) {
+               ipc_unregister(hal_ipc, HAL_SERVICE_ID_CORE);
+               ipc_cleanup(hal_ipc);
+       }
 
        info("Exit");