fsck.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/fsck.c b/fsck.c
index 05315451c56f..722b65371d38 100644
--- a/fsck.c
+++ b/fsck.c
@@ -60,6 +60,7 @@
 	FUNC(NULL_SHA1, WARN) \
 	FUNC(ZERO_PADDED_FILEMODE, WARN) \
 	FUNC(NUL_IN_COMMIT, WARN) \
+	FUNC(DATE_ORDERING, WARN) \
 	/* infos (reported as warnings, but ignored by default) */ \
 	FUNC(BAD_TAG_NAME, INFO) \
 	FUNC(MISSING_TAGGER_ENTRY, INFO)
@@ -604,6 +605,17 @@ static int fsck_ident(const char **ident, struct object *obj, struct fsck_option
 	return 0;
 }
 
+static void fsck_commit_date(struct fsck_options *options, struct commit *commit)
+{
+	struct commit_list *p;
+
+	for (p = commit->parents; p; p = p->next) {
+		struct commit *parent = p->item;
+		if (commit->date < parent->date)
+			report(options, &commit->object, FSCK_MSG_DATE_ORDERING, "Bad commit date ordering with parent");
+	}
+}
+
 static int fsck_commit_buffer(struct commit *commit, const char *buffer,
 	unsigned long size, struct fsck_options *options)
 {
@@ -650,6 +662,7 @@ static int fsck_commit_buffer(struct commit *commit, const char *buffer,
 				return err;
 		}
 	}
+	fsck_commit_date(options, commit);
 	author_count = 0;
 	while (skip_prefix(buffer, "author ", &buffer)) {
 		author_count++;