From f367438b192887a18c65f1958761b51deed7c64d Mon Sep 17 00:00:00 2001
From: Artem Savkov <asavkov@redhat.com>
Date: Wed, 31 Jul 2019 13:33:20 +0200
Subject: [PATCH] create-diff-object: null checks in rela_equal()

Make sure rela_toc(1|2) are not null before dereferencing them in
rela_equal().

Found by covscan, see issue #984 for full log.

Signed-off-by: Artem Savkov <asavkov@redhat.com>
---
 kpatch-build/create-diff-object.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kpatch-build/create-diff-object.c b/kpatch-build/create-diff-object.c
index 6d43fef..ddf73e0 100644
--- a/kpatch-build/create-diff-object.c
+++ b/kpatch-build/create-diff-object.c
@@ -373,6 +373,9 @@ static int rela_equal(struct rela *rela1, struct rela *rela2)
 	if (!rela_toc1 && !rela_toc2)
 		return toc_data1 == toc_data2;
 
+	if (!rela_toc1 || !rela_toc2)
+		return 0;
+
 	if (rela_toc1->string)
 		return rela_toc2->string && !strcmp(rela_toc1->string, rela_toc2->string);