From 64f27433a172af6d510046b83cf8529bbda69d63 Mon Sep 17 00:00:00 2001
From: Shivani Bhardwaj <shivani@oisf.net>
Date: Thu, 27 Jul 2023 15:53:14 +0530
Subject: [PATCH] af-packet: Error on invalid peer device setting

If the copy-iface was set to the same as the af-packet interface, the
peer won't be set. This leads to segfault. Catch it and return properly.

Bug 5870
---
 src/source-af-packet.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/source-af-packet.c b/src/source-af-packet.c
index 0c50ed219aa6..28a3730b469c 100644
--- a/src/source-af-packet.c
+++ b/src/source-af-packet.c
@@ -661,6 +661,10 @@ static void AFPWritePacket(Packet *p, int version)
     }
 
     /* Index of the network device */
+    if (p->afp_v.peer == NULL) {
+        SCLogError("Peer network device invalid");
+        return;
+    }
     socket_address.sll_ifindex = SC_ATOMIC_GET(p->afp_v.peer->if_idx);
     /* Address length*/
     socket_address.sll_halen = ETH_ALEN;