From 298da20fe62d0c37f7ee6ec7f9a87bdfb4e5f19b Mon Sep 17 00:00:00 2001
From: David Korczynski <david@adalogics.com>
Date: Sat, 7 Jan 2023 06:58:27 -0800
Subject: [PATCH] signv4: handle error case

`flb_kv_item_create_len` may fail and this should be handled.

Signed-off-by: David Korczynski <david@adalogics.com>
---
 src/flb_signv4.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/flb_signv4.c b/src/flb_signv4.c
index 768f2360260..4e405968231 100644
--- a/src/flb_signv4.c
+++ b/src/flb_signv4.c
@@ -497,6 +497,9 @@ void headers_sanitize(struct mk_list *in_list, struct mk_list *out_list)
         kv = flb_kv_item_create_len(&out_tmp,
                                     kv->key, flb_sds_len(kv->key),
                                     v_start, v_end - v_start);
+        if (kv == NULL) {
+            continue;
+        }
         for (x = 0; x < flb_sds_len(kv->key); x++) {
             kv->key[x] = tolower(kv->key[x]);
         }