From 550f3e5b9d9de4e662ecfbed0059cd3351e2278b Mon Sep 17 00:00:00 2001
From: Ivan Nardi <12729895+IvanNardi@users.noreply.github.com>
Date: Tue, 25 Oct 2022 16:16:24 +0200
Subject: IRC: fix memory access (#1787)

---
 src/lib/protocols/irc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lib/protocols/irc.c b/src/lib/protocols/irc.c
index 9f9034641..a5da28ef1 100644
--- a/src/lib/protocols/irc.c
+++ b/src/lib/protocols/irc.c
@@ -408,7 +408,7 @@ void ndpi_search_irc_tcp(struct ndpi_detection_module_struct *ndpi_struct, struc
 	if(user) {
 	  char buf[32], msg[64], *sp;
 
-	  snprintf(buf, sizeof(buf), "%.*s", packet->payload_packet_len - 5, &user[5]);
+	  snprintf(buf, sizeof(buf), "%.*s", (int)(packet->payload_packet_len - (user + 5 - (char *)packet->payload)), user + 5);
 	  if((sp = strchr(buf, ' ')) != NULL)
 	    sp[0] = '\0';
 	  
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