From 2cc62133db4f6875f55e73e044f37dafbb2274c2 Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Tue, 23 Apr 2024 12:08:30 +0200
Subject: [PATCH] regex: allocate pcres array

- GH #3812
---
 src/modules/regex/regex_mod.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/modules/regex/regex_mod.c b/src/modules/regex/regex_mod.c
index 8e8c1645f0e..4bb4d7cdcee 100644
--- a/src/modules/regex/regex_mod.c
+++ b/src/modules/regex/regex_mod.c
@@ -462,6 +462,15 @@ static int load_pcres(int action)
 		}
 		shm_free(pcres);
 	}
+
+	if(pcres == NULL) {
+		if((pcres = shm_malloc(sizeof(pcre2_code *) * num_pcres_tmp)) == 0) {
+			LM_ERR("no more memory for pcres\n");
+			goto err;
+		}
+		memset(pcres, 0, sizeof(pcre2_code *) * num_pcres_tmp);
+	}
+
 	*num_pcres = num_pcres_tmp;
 	*pcres = *pcres_tmp;
 	*pcres_addr = pcres;