diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index b02d968..1716ec0 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -129,6 +129,11 @@
     if (args.size() < 2) {
         return device->WriteStatus(FastbootResult::FAIL, "Invalid arguments");
     }
+
+    if (GetDeviceLockStatus()) {
+        return device->WriteStatus(FastbootResult::FAIL, "Erase is not allowed on locked devices");
+    }
+
     PartitionHandle handle;
     if (!OpenPartition(device, args[1], &handle)) {
         return device->WriteStatus(FastbootResult::FAIL, "Partition doesn't exist");
@@ -161,6 +166,12 @@
     if (args.size() < 2) {
         return device->WriteStatus(FastbootResult::FAIL, "size argument unspecified");
     }
+
+    if (GetDeviceLockStatus()) {
+        return device->WriteStatus(FastbootResult::FAIL,
+                                   "Download is not allowed on locked devices");
+    }
+
     // arg[0] is the command name, arg[1] contains size of data to be downloaded
     unsigned int size;
     if (!android::base::ParseUint("0x" + args[1], &size, UINT_MAX)) {
@@ -201,6 +212,11 @@
         return device->WriteStatus(FastbootResult::FAIL, "Missing slot argument");
     }
 
+    if (GetDeviceLockStatus()) {
+        return device->WriteStatus(FastbootResult::FAIL,
+                                   "set_active command is not allowed on locked devices");
+    }
+
     // Slot suffix needs to be between 'a' and 'z'.
     Slot slot;
     if (!GetSlotNumber(args[1], &slot)) {