mainloop: make sure that descr->ring is allocated

This is future proofing more than anything else.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/mainloop.c b/src/lxc/mainloop.c
index 7c8f5d86afdca20654e497e1e1c02108fcd4c4dc..17a4d55293b1254c53530f22092bc8e7892e5d7b 100644 (file)
--- a/src/lxc/mainloop.c
+++ b/src/lxc/mainloop.c
@@ -515,8 +515,10 @@ void lxc_mainloop_close(struct lxc_async_descr *descr)
 
        if (descr->type == LXC_MAINLOOP_IO_URING) {
 #if HAVE_LIBURING
-               io_uring_queue_exit(descr->ring);
-               munmap(descr->ring, sizeof(struct io_uring));
+               if (descr->ring) {
+                       io_uring_queue_exit(descr->ring);
+                       munmap(descr->ring, sizeof(struct io_uring));
+               }
 #else
                ERROR("Unsupported io_uring mainloop");
 #endif