Android/frameworks_base
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge "Corrupt the PersistentDataBlock payload explicitly in factory reset" into sc-dev am: 8199b2b1d3

Browse Source 
Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14640276

Change-Id: Idf636265ba70eab8720c54a7db014270e53e8f7e
This commit is contained in:
Howard Chen
2021-05-25 04:48:17 +00:00
committed by Automerger Merge Worker
parent e73847fd8b 8199b2b1d3
commit 7bf46f89dd
1 changed files with 6 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
services/core/java/com/android/server/PersistentDataBlockService.java
View File

@@ -39,11 +39,9 @@ import com.android.internal.annotations.GuardedBy;
import libcore.io.IoUtils;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
@@ -377,11 +375,16 @@ public class PersistentDataBlockService extends SystemService {
try {
FileChannel channel = getBlockOutputChannel();
ByteBuffer buf = ByteBuffer.allocate(DIGEST_SIZE_BYTES + HEADER_SIZE);
int header_size = DIGEST_SIZE_BYTES + HEADER_SIZE;
ByteBuffer buf = ByteBuffer.allocate(header_size);
buf.put(new byte[DIGEST_SIZE_BYTES]);
buf.putInt(PARTITION_TYPE_MARKER);
buf.putInt(0);
channel.write(buf);
// corrupt the payload explicitly
int payload_size = (int) getBlockDeviceSize() - header_size;
buf = ByteBuffer.allocate(payload_size);
channel.write(buf);
channel.force(true);
} catch (IOException e) {
Slog.e(TAG, "failed to format block", e);