diff --git a/fsck.c b/fsck.c
index 76a0ad36db..105b3e7f48 100644
--- a/fsck.c
+++ b/fsck.c
@@ -10,6 +10,10 @@
 #include "utf8.h"
 #include "sha1-array.h"
 #include "decorate.h"
+#include "oidset.h"
+
+static struct oidset gitmodules_found = OIDSET_INIT;
+static struct oidset gitmodules_done = OIDSET_INIT;
 
 #define FSCK_FATAL -1
 #define FSCK_INFO -2
@@ -44,6 +48,7 @@
 	FUNC(MISSING_TAG_ENTRY, ERROR) \
 	FUNC(MISSING_TAG_OBJECT, ERROR) \
 	FUNC(MISSING_TREE, ERROR) \
+	FUNC(MISSING_TREE_OBJECT, ERROR) \
 	FUNC(MISSING_TYPE, ERROR) \
 	FUNC(MISSING_TYPE_ENTRY, ERROR) \
 	FUNC(MULTIPLE_AUTHORS, ERROR) \
@@ -51,6 +56,8 @@
 	FUNC(TREE_NOT_SORTED, ERROR) \
 	FUNC(UNKNOWN_TYPE, ERROR) \
 	FUNC(ZERO_PADDED_DATE, ERROR) \
+	FUNC(GITMODULES_MISSING, ERROR) \
+	FUNC(GITMODULES_BLOB, ERROR) \
 	/* warnings */ \
 	FUNC(BAD_FILEMODE, WARN) \
 	FUNC(EMPTY_NAME, WARN) \
@@ -563,6 +570,10 @@ static int fsck_tree(struct tree *item, struct fsck_options *options)
 		has_dotdot |= !strcmp(name, "..");
 		has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name);
 		has_zero_pad |= *(char *)desc.buffer == '0';
+
+		if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name))
+			oidset_insert(&gitmodules_found, oid);
+
 		if (update_tree_entry_gently(&desc)) {
 			retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree");
 			break;
@@ -936,3 +947,50 @@ int fsck_error_function(struct fsck_options *o,
 	error("object %s: %s", describe_object(o, obj), message);
 	return 1;
 }
+
+int fsck_finish(struct fsck_options *options)
+{
+	int ret = 0;
+	struct oidset_iter iter;
+	const struct object_id *oid;
+
+	oidset_iter_init(&gitmodules_found, &iter);
+	while ((oid = oidset_iter_next(&iter))) {
+		struct blob *blob;
+		enum object_type type;
+		unsigned long size;
+		char *buf;
+
+		if (oidset_contains(&gitmodules_done, oid))
+			continue;
+
+		blob = lookup_blob(oid);
+		if (!blob) {
+			ret |= report(options, &blob->object,
+				      FSCK_MSG_GITMODULES_BLOB,
+				      "non-blob found at .gitmodules");
+			continue;
+		}
+
+		buf = read_sha1_file(oid->hash, &type, &size);
+		if (!buf) {
+			ret |= report(options, &blob->object,
+				      FSCK_MSG_GITMODULES_MISSING,
+				      "unable to read .gitmodules blob");
+			continue;
+		}
+
+		if (type == OBJ_BLOB)
+			ret |= fsck_blob(blob, buf, size, options);
+		else
+			ret |= report(options, &blob->object,
+				      FSCK_MSG_GITMODULES_BLOB,
+				      "non-blob found at .gitmodules");
+		free(buf);
+	}
+
+
+	oidset_clear(&gitmodules_found);
+	oidset_clear(&gitmodules_done);
+	return ret;
+}
diff --git a/fsck.h b/fsck.h
index 4525510d99..c3cf5e0034 100644
--- a/fsck.h
+++ b/fsck.h
@@ -53,4 +53,11 @@ int fsck_walk(struct object *obj, void *data, struct fsck_options *options);
 int fsck_object(struct object *obj, void *data, unsigned long size,
 	struct fsck_options *options);
 
+/*
+ * Some fsck checks are context-dependent, and may end up queued; run this
+ * after completing all fsck_object() calls in order to resolve any remaining
+ * checks.
+ */
+int fsck_finish(struct fsck_options *options);
+
 #endif