commit 2f23d3f3f92dddfdb524203d0993e052b7d9e20e
author Derrick Stolee <dstolee@microsoft.com> Thu Sep 13 11:02:20 2018 -0700
committer Junio C Hamano <gitster@pobox.com> Mon Sep 17 13:49:41 2018 -0700
tree 9b8cc567aa6f40ff30eacb3e319c47ae9f315d65
parent d4bf1d88b9020d3921ac4e4d8a8fd6ca5015b243

multi-pack-index: verify oid fanout order

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

midx.c

diff --git a/midx.c b/midx.c
index 01f4d69..7dab13a 100644
--- a/midx.c
+++ b/midx.c
@@ -950,5 +950,14 @@ int verify_midx_file(const char *object_dir)
 			midx_report("failed to load pack in position %d", i);
 	}
 
+	for (i = 0; i < 255; i++) {
+		uint32_t oid_fanout1 = ntohl(m->chunk_oid_fanout[i]);
+		uint32_t oid_fanout2 = ntohl(m->chunk_oid_fanout[i + 1]);
+
+		if (oid_fanout1 > oid_fanout2)
+			midx_report(_("oid fanout out of order: fanout[%d] = %"PRIx32" > %"PRIx32" = fanout[%d]"),
+				    i, oid_fanout1, oid_fanout2, i + 1);
+	}
+
 	return verify_midx_error;
 }