Fix missing .fsv_sig after partial split install

Test: adb install-multiple foo.apk foo.apk.fsv_sig
      adb install-multiple -p com.foo foo_split.apk foo_split.apk.fsv_sig
      # See base.apk.fsv_sig in /data/app/com.foo-*/
Bug: 112037636
Change-Id: I043c7bf545164c58b2cc37507d10188c25033f6b

services/core/java/com/android/server/pm/PackageInstallerSession.java

@@ -1474,12 +1474,12 @@ public class PackageInstallerSession extends IPackageInstallerSession.Stub {
             // Inherit base if not overridden
             if (mResolvedBaseFile == null) {
                 mResolvedBaseFile = new File(appInfo.getBaseCodePath());
-                mResolvedInheritedFiles.add(mResolvedBaseFile);
+                resolveInheritedFile(mResolvedBaseFile);
                 // Inherit the dex metadata if present.
                 final File baseDexMetadataFile =
                         DexMetadataHelper.findDexMetadataForFile(mResolvedBaseFile);
                 if (baseDexMetadataFile != null) {
-                    mResolvedInheritedFiles.add(baseDexMetadataFile);
+                    resolveInheritedFile(baseDexMetadataFile);
                 }
                 baseApk = existingBase;
             }
@@ -1491,12 +1491,12 @@ public class PackageInstallerSession extends IPackageInstallerSession.Stub {
                     final File splitFile = new File(existing.splitCodePaths[i]);
                     final boolean splitRemoved = removeSplitList.contains(splitName);
                     if (!stagedSplits.contains(splitName) && !splitRemoved) {
-                        mResolvedInheritedFiles.add(splitFile);
+                        resolveInheritedFile(splitFile);
                         // Inherit the dex metadata if present.
                         final File splitDexMetadataFile =
                                 DexMetadataHelper.findDexMetadataForFile(splitFile);
                         if (splitDexMetadataFile != null) {
-                            mResolvedInheritedFiles.add(splitDexMetadataFile);
+                            resolveInheritedFile(splitDexMetadataFile);
                         }
                     }
                 }
@@ -1610,6 +1610,17 @@ public class PackageInstallerSession extends IPackageInstallerSession.Stub {
         mResolvedStagedFiles.add(stagedSignature);
     }
 
+    private void resolveInheritedFile(File origFile) {
+        mResolvedInheritedFiles.add(origFile);
+
+        // Inherit the fsverity signature file if present.
+        final File fsveritySignatureFile = new File(
+                VerityUtils.getFsveritySignatureFilePath(origFile.getPath()));
+        if (fsveritySignatureFile.exists()) {
+            mResolvedInheritedFiles.add(fsveritySignatureFile);
+        }
+    }
+
     @GuardedBy("mLock")
     private void assertApkConsistentLocked(String tag, ApkLite apk)
             throws PackageManagerException {

services/core/java/com/android/server/pm/PackageManagerService.java

@@ -17041,7 +17041,7 @@ public class PackageManagerService extends IPackageManager.Stub
 
             if (!legacyMode) {
                 // fs-verity is optional for now.  Only set up if signature is provided.
-                if (new File(signaturePath).exists()) {
+                if (new File(signaturePath).exists() && !VerityUtils.hasFsverity(filePath)) {
                     try {
                         VerityUtils.setUpFsverity(filePath, signaturePath);
                     } catch (IOException | DigestException | NoSuchAlgorithmException