diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index abe91dc8722e..21f5cb86d70c 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -1187,7 +1187,8 @@ sbc_execute_unmap(struct se_cmd *cmd)
 			goto err;
 		}
 
-		if (lba + range > dev->transport->get_blocks(dev) + 1) {
+		if (lba + range < lba ||
+		    lba + range > dev->transport->get_blocks(dev) + 1) {
 			ret = TCM_ADDRESS_OUT_OF_RANGE;
 			goto err;
 		}