diff --git a/tools/releasetools/Android.bp b/tools/releasetools/Android.bp
index 11fb584..cafc2bb 100644
--- a/tools/releasetools/Android.bp
+++ b/tools/releasetools/Android.bp
@@ -435,6 +435,7 @@
     ],
     required: [
         "checkvintf",
+        "host_init_verifier",
     ],
     target: {
         darwin: {
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 149deda..bae0b20 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -1102,6 +1102,29 @@
   return merged_dict
 
 
+def PartitionMapFromTargetFiles(target_files_dir):
+  """Builds a map from partition -> path within an extracted target files directory."""
+  # Keep possible_subdirs in sync with build/make/core/board_config.mk.
+  possible_subdirs = {
+      "system": ["SYSTEM"],
+      "vendor": ["VENDOR", "SYSTEM/vendor"],
+      "product": ["PRODUCT", "SYSTEM/product"],
+      "system_ext": ["SYSTEM_EXT", "SYSTEM/system_ext"],
+      "odm": ["ODM", "VENDOR/odm", "SYSTEM/vendor/odm"],
+      "vendor_dlkm": [
+          "VENDOR_DLKM", "VENDOR/vendor_dlkm", "SYSTEM/vendor/vendor_dlkm"
+      ],
+      "odm_dlkm": ["ODM_DLKM", "VENDOR/odm_dlkm", "SYSTEM/vendor/odm_dlkm"],
+  }
+  partition_map = {}
+  for partition, subdirs in possible_subdirs.items():
+    for subdir in subdirs:
+      if os.path.exists(os.path.join(target_files_dir, subdir)):
+        partition_map[partition] = subdir
+        break
+  return partition_map
+
+
 def SharedUidPartitionViolations(uid_dict, partition_groups):
   """Checks for APK sharedUserIds that cross partition group boundaries.
 
@@ -1134,6 +1157,36 @@
   return errors
 
 
+def RunHostInitVerifier(product_out, partition_map):
+  """Runs host_init_verifier on the init rc files within partitions.
+
+  host_init_verifier searches the etc/init path within each partition.
+
+  Args:
+    product_out: PRODUCT_OUT directory, containing partition directories.
+    partition_map: A map of partition name -> relative path within product_out.
+  """
+  allowed_partitions = ("system", "system_ext", "product", "vendor", "odm")
+  cmd = ["host_init_verifier"]
+  for partition, path in partition_map.items():
+    if partition not in allowed_partitions:
+      raise ExternalError("Unable to call host_init_verifier for partition %s" %
+                          partition)
+    cmd.extend(["--out_%s" % partition, os.path.join(product_out, path)])
+    # Add --property-contexts if the file exists on the partition.
+    property_contexts = "%s_property_contexts" % (
+        "plat" if partition == "system" else partition)
+    property_contexts_path = os.path.join(product_out, path, "etc", "selinux",
+                                          property_contexts)
+    if os.path.exists(property_contexts_path):
+      cmd.append("--property-contexts=%s" % property_contexts_path)
+    # Add the passwd file if the file exists on the partition.
+    passwd_path = os.path.join(product_out, path, "etc", "passwd")
+    if os.path.exists(passwd_path):
+      cmd.extend(["-p", passwd_path])
+  return RunAndCheckOutput(cmd)
+
+
 def AppendAVBSigningArgs(cmd, partition):
   """Append signing arguments for avbtool."""
   # e.g., "--key path/to/signing_key --algorithm SHA256_RSA4096"
diff --git a/tools/releasetools/merge_target_files.py b/tools/releasetools/merge_target_files.py
index b1b4a16..9360d7b 100755
--- a/tools/releasetools/merge_target_files.py
+++ b/tools/releasetools/merge_target_files.py
@@ -951,18 +951,15 @@
   if not check_target_files_vintf.CheckVintf(output_target_files_temp_dir):
     raise RuntimeError('Incompatible VINTF metadata')
 
+  partition_map = common.PartitionMapFromTargetFiles(
+      output_target_files_temp_dir)
+
   # Generate and check for cross-partition violations of sharedUserId
   # values in APKs. This requires the input target-files packages to contain
   # *.apk files.
   shareduid_violation_modules = os.path.join(
       output_target_files_temp_dir, 'META', 'shareduid_violation_modules.json')
   with open(shareduid_violation_modules, 'w') as f:
-    framework_partitions = item_list_to_partition_set(framework_item_list)
-    vendor_partitions = item_list_to_partition_set(vendor_item_list)
-
-    partition_map = {}
-    for partition in (framework_partitions.union(vendor_partitions)):
-      partition_map[partition.lower()] = partition.upper()
     violation = find_shareduid_violation.FindShareduidViolation(
         output_target_files_temp_dir, partition_map)
 
@@ -970,6 +967,8 @@
     f.write(violation)
 
     # Check for violations across the input builds' partition groups.
+    framework_partitions = item_list_to_partition_set(framework_item_list)
+    vendor_partitions = item_list_to_partition_set(vendor_item_list)
     shareduid_errors = common.SharedUidPartitionViolations(
         json.loads(violation), [framework_partitions, vendor_partitions])
     if shareduid_errors:
@@ -978,6 +977,17 @@
       raise ValueError('sharedUserId APK error. See %s' %
                        shareduid_violation_modules)
 
+  # Run host_init_verifier on the combined init rc files.
+  filtered_partitions = {
+      partition: path
+      for partition, path in partition_map.items()
+      # host_init_verifier checks only the following partitions:
+      if partition in ['system', 'system_ext', 'product', 'vendor', 'odm']
+  }
+  common.RunHostInitVerifier(
+      product_out=output_target_files_temp_dir,
+      partition_map=filtered_partitions)
+
   generate_images(output_target_files_temp_dir, rebuild_recovery)
 
   generate_super_empty_image(output_target_files_temp_dir, output_super_empty)
diff --git a/tools/releasetools/test_common.py b/tools/releasetools/test_common.py
index 0b368f9..ecd759c 100644
--- a/tools/releasetools/test_common.py
+++ b/tools/releasetools/test_common.py
@@ -996,6 +996,27 @@
         },
         sparse_image.file_map)
 
+  def test_PartitionMapFromTargetFiles(self):
+    target_files_dir = common.MakeTempDir()
+    os.makedirs(os.path.join(target_files_dir, 'SYSTEM'))
+    os.makedirs(os.path.join(target_files_dir, 'SYSTEM', 'vendor'))
+    os.makedirs(os.path.join(target_files_dir, 'PRODUCT'))
+    os.makedirs(os.path.join(target_files_dir, 'SYSTEM', 'product'))
+    os.makedirs(os.path.join(target_files_dir, 'SYSTEM', 'vendor', 'odm'))
+    os.makedirs(os.path.join(target_files_dir, 'VENDOR_DLKM'))
+    partition_map = common.PartitionMapFromTargetFiles(target_files_dir)
+    self.assertDictEqual(
+        partition_map,
+        {
+            'system': 'SYSTEM',
+            'vendor': 'SYSTEM/vendor',
+            # Prefer PRODUCT over SYSTEM/product
+            'product': 'PRODUCT',
+            'odm': 'SYSTEM/vendor/odm',
+            'vendor_dlkm': 'VENDOR_DLKM',
+            # No system_ext or odm_dlkm
+        })
+
   def test_SharedUidPartitionViolations(self):
     uid_dict = {
         'android.uid.phone': {