From f8f1679bc46a99462daf4336be5155db37482361 Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl@samba.org>
Date: Fri, 12 Sep 2008 21:19:37 +0200
Subject: Add a paranoia check on incoming PDUs (This used to be commit
 8b81b85200b7ca18cf81fdbbc3254d8578b35f43)

---
 source3/libsmb/async_smb.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/source3/libsmb/async_smb.c b/source3/libsmb/async_smb.c
index eedc7d4481..b4d93ff968 100644
--- a/source3/libsmb/async_smb.c
+++ b/source3/libsmb/async_smb.c
@@ -759,6 +759,13 @@ static void handle_incoming_pdu(struct cli_state *cli)
 
 	}
 
+	if ((IVAL(pdu, 4) != 0x424d53ff) /* 0xFF"SMB" */
+	    && (IVAL(pdu, 4) != 0x424d45ff)) /* 0xFF"EMB" */ {
+		DEBUG(10, ("Got non-SMB PDU\n"));
+		status = NT_STATUS_INVALID_NETWORK_RESPONSE;
+		goto invalidate_requests;
+	}
+
 	/*
 	 * TODO: Handle oplock break requests
 	 */
-- 
cgit