Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 24 Dec 2002 10:21:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 24 Dec 2002 10:21:03 -0500 Received: from [81.2.122.30] ([81.2.122.30]:8709 "EHLO darkstar.example.net") by vger.kernel.org with ESMTP id ; Tue, 24 Dec 2002 10:21:02 -0500 From: John Bradford Message-Id: <200212241541.gBOFf1rt000606@darkstar.example.net> Subject: Re: KERNEL: assertion tcp.c in 2.4.20 To: byron@markerman.com (Byron Albert) Date: Tue, 24 Dec 2002 15:41:00 +0000 (GMT) Cc: linux-kernel@vger.kernel.org In-Reply-To: <3E087C19.3000307@markerman.com> from "Byron Albert" at Dec 24, 2002 10:24:09 AM X-Mailer: ELM [version 2.5 PL6] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1716 Lines: 40 > I have been seeing some odd errors in 2.4.20. > KERNEL: assertion (newsk->state != TCP_SYN_RECV) failed at tcp.c(2229) > KERNEL: assertion > ((1<state)&(TCPF_ESTABLISHED|TCPF_CLOSE_WAIT|TCPF_CLOSE)) failed > at af_inet.c(689) > KERNEL: assertion (newsk->state != TCP_SYN_RECV) failed at tcp.c(2229) > KERNEL: assertion > ((1<state)&(TCPF_ESTABLISHED|TCPF_CLOSE_WAIT|TCPF_CLOSE)) failed > at af_inet.c(689) > KERNEL: assertion (newsk->state != TCP_SYN_RECV) failed at tcp.c(2229) > KERNEL: assertion > ((1<state)&(TCPF_ESTABLISHED|TCPF_CLOSE_WAIT|TCPF_CLOSE)) failed > at af_inet.c(689) > > Could some one tell me what that means and if I should be worried. > > Also I get alot other TCP: messages Could some one explain to me what > these mean? > TCP: drop open request from 63.65.68.246/33287 > TCP: drop open request from 24.184.185.85/3568 > TCP: drop open request from 24.184.185.85/3569 > TCP: drop open request from 24.184.185.85/3567 > TCP: drop open request from 24.184.185.85/3570 > TCP: drop open request from 24.184.185.85/3571 > TCP: drop open request from 24.184.185.85/3572 > TCP: drop open request from 24.184.185.85/3573 > TCP: drop open request from 24.184.185.85/3574 > TCP: drop open request from 24.184.185.85/3575 > NET: 147 messages suppressed. Looks like a SYN flood. What is this machine being used for? It might indicate a SYN flood attack, or trying to serve more connections than the machine can handle. John. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/