From 31bd3627cd627536c749576a357ba0bf8a73b9d1 Mon Sep 17 00:00:00 2001
From: William Lallemand <wlallemand@haproxy.com>
Date: Wed, 2 Apr 2025 10:02:07 +0200
Subject: [PATCH] BUILD: ssl/ckch: potential null pointer dereference
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src/ssl_ckch.c: In function ‘ckch_conf_parse’:
src/ssl_ckch.c:4852:40: error: potential null pointer dereference [-Werror=null-dereference]
 4852 |                                 while (*r) {
      |                                        ^~

Add a test on r before using *r.

No backport needed
---
 src/ssl_ckch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ssl_ckch.c b/src/ssl_ckch.c
index 4352bfc26..203d25270 100644
--- a/src/ssl_ckch.c
+++ b/src/ssl_ckch.c
@@ -4849,7 +4849,7 @@ int ckch_conf_parse(char **args, int cur_arg, struct ckch_conf *f, int *found, c
 
 				goto out;
 array_err:
-				while (*r) {
+				while (r && *r) {
 					char *prev = *r;
 					r++;
 					free(prev);