From 4599f551dead9eac233b91c0b9ee5879f5d0620a Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Mon, 9 Jun 2025 08:44:23 +0200
Subject: [PATCH] dhcp: Clear flags

Do not assume that mem_malloc() returns cleared memory.
---
 src/core/ipv4/dhcp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/ipv4/dhcp.c b/src/core/ipv4/dhcp.c
index c149dd12..5c401368 100644
--- a/src/core/ipv4/dhcp.c
+++ b/src/core/ipv4/dhcp.c
@@ -831,6 +831,8 @@ dhcp_start(struct netif *netif)
       return ERR_MEM;
     }
 
+    /* clear the flags, the rest is cleared below */
+    dhcp->flags = 0;
     /* store this dhcp client in the netif */
     netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, dhcp);
     LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): allocated dhcp\n"));