diff --git a/net/core/dev.c b/net/core/dev.c
index 17bc535..18d8b5a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1882,8 +1882,10 @@
 
 		if (!new_dev_maps)
 			new_dev_maps = kzalloc(maps_sz, GFP_KERNEL);
-		if (!new_dev_maps)
+		if (!new_dev_maps) {
+			mutex_unlock(&xps_map_mutex);
 			return -ENOMEM;
+		}
 
 		map = dev_maps ? xmap_dereference(dev_maps->cpu_map[cpu]) :
 				 NULL;