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Commit fd282ed2 authored by Andres Morales's avatar Andres Morales
Browse files

check bootloader and baseband version 

Make sure flashed bootloader/radio matches what we
expect statically.

Change-Id: I71dfcc658695ef5542bc968747345efe0936c350
parent 26bf3ea5

core/java/android/os/Build.java

+26 −3
Original line number Diff line number Diff line
@@ -650,15 +650,22 @@ public class Build { 
    }



    /**

     * Check that device fingerprint is defined and that it matches across

     * Verifies the the current flash of the device is consistent with what

     * was expected at build time.

     * 1) Checks that device fingerprint is defined and that it matches across

     *    various partitions.

     * 2) Verifies radio and bootloader partitions are those expected in the build.

     *

     * @hide

     */

    public static boolean isFingerprintConsistent() {

    public static boolean isBuildConsistent() {

        final String system = SystemProperties.get("ro.build.fingerprint");

        final String vendor = SystemProperties.get("ro.vendor.build.fingerprint");

        final String bootimage = SystemProperties.get("ro.bootimage.build.fingerprint");

        final String requiredBootloader = SystemProperties.get("ro.build.expect.bootloader");

        final String currentBootloader = SystemProperties.get("ro.bootloader");

        final String requiredRadio = SystemProperties.get("ro.build.expect.baseband");

        final String currentRadio = SystemProperties.get("gsm.version.baseband");



        if (TextUtils.isEmpty(system)) {

            Slog.e(TAG, "Required ro.build.fingerprint is empty!");
@@ -681,6 +688,22 @@ public class Build { 
            }

        }



        if (!TextUtils.isEmpty(requiredBootloader)) {

            if (!Objects.equals(currentBootloader, requiredBootloader)) {

                Slog.e(TAG, "Mismatched bootloader version: build requires " + requiredBootloader

                        + " but runtime reports " + currentBootloader);

                return false;

            }

        }



        if (!TextUtils.isEmpty(requiredRadio)) {

            if (!Objects.equals(currentRadio, requiredRadio)) {

                Slog.e(TAG, "Mismatched radio version: build requires " + requiredRadio

                        + " but runtime reports " + currentRadio);

                return false;

            }

        }



        return true;

    }

services/core/java/com/android/server/am/ActivityManagerService.java

+61 −61
Original line number Diff line number Diff line
@@ -10925,7 +10925,7 @@ public final class ActivityManagerService extends ActivityManagerNative 
            } catch (RemoteException e) {

            }













            if (!Build.isFingerprintConsistent()) {













            if (!Build.isBuildConsistent()) {















                Slog.e(TAG, "Build fingerprint is not consistent, warning user");















                mHandler.obtainMessage(SHOW_FINGERPRINT_ERROR_MSG).sendToTarget();















            }