From c017eabdc9b4cea22a423728556d970abeb8f4c1 Mon Sep 17 00:00:00 2001
From: x19 <100000306+0xNineteen@users.noreply.github.com>
Date: Thu, 16 Jan 2025 07:57:02 -0500
Subject: [PATCH] fix(gossip): contact-info cache OOB (#500)

---
 src/gossip/data.zig | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/gossip/data.zig b/src/gossip/data.zig
index e54b348d1..b6b9a9182 100644
--- a/src/gossip/data.zig
+++ b/src/gossip/data.zig
@@ -1255,7 +1255,13 @@ pub const ContactInfo = struct {
                 .ipv6 => SocketAddr.initIpv6(addr.asV6(), port),
             };
             socket.sanitize() catch continue;
-            self.cache[@intFromEnum(socket_entry.key)] = socket;
+
+            const cache_index = @intFromEnum(socket_entry.key);
+            if (cache_index >= SOCKET_CACHE_SIZE) {
+                // warn
+                continue;
+            }
+            self.cache[cache_index] = socket;
         }
     }