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>
lxc · Oct 29, 2021 · f69e6b4 · f69e6b4
1 parent 1a88958
commit f69e6b4
Showing 1 changed file with 4 additions and 2 deletions.
diff --git 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