From d1f6f6fca984d3da702a4cf0799f1b55d5cd54e2 Mon Sep 17 00:00:00 2001
From: Evgeny <me@jeka.su>
Date: Mon, 27 Jul 2026 23:48:18 +0300
Subject: [PATCH] fix WELCOME deserialization: skip atl+adm_tags_sig fields
 before address data

---
 src/chat/chat_sync.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/chat/chat_sync.c b/src/chat/chat_sync.c
index b333608a..c578ea42 100644
--- a/src/chat/chat_sync.c
+++ b/src/chat/chat_sync.c
@@ -1162,6 +1162,10 @@ static void cs_handle_welcome(struct chat_sync* cs, uint64_t peer,
         char peer_userinfo[256] = "";
         if (nl && p + nl <= pl + len) { memcpy(peer_userinfo, p, nl); peer_userinfo[nl] = '\0'; p += nl; }
         uint8_t ac = *p++;
+        uint8_t atl = *p++;
+        if (atl > 0 && p + atl <= pl + len) p += atl;
+        p += 64; /* adm_tags_sig */
+
 
         /* verify join_sig if present */
         if (join_sig) {