Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754525AbaDFS63 (ORCPT ); Sun, 6 Apr 2014 14:58:29 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:44640 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754355AbaDFS60 (ORCPT ); Sun, 6 Apr 2014 14:58:26 -0400 Message-ID: <5341A3C1.9060101@oracle.com> Date: Sun, 06 Apr 2014 14:58:09 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: "David S. Miller" CC: "netdev@vger.kernel.org" , linux-decnet-user@lists.sourceforge.net, LKML , Dave Jones Subject: net: decnet: NULL ptr deref on connect() X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, While fuzzing with trinity inside a KVM tools guest running the latest -next kernel, I've stumbled on the following: [ 279.107409] BUG: unable to handle kernel NULL pointer dereference at (null) [ 279.108676] IP: dnet_select_source.isra.25 (net/decnet/dn_route.c:926) [ 279.109876] PGD 19dd92067 PUD 1a25ab067 PMD 0 [ 279.110186] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 279.110186] Dumping ftrace buffer: [ 279.110186] (ftrace buffer empty) [ 279.110186] Modules linked in: [ 279.110186] CPU: 1 PID: 17317 Comm: trinity-c78 Not tainted 3.14.0-next-20140403-sasha-00022-g10224c0 #377 [ 279.110186] task: ffff880196c60000 ti: ffff8801b6e8a000 task.ti: ffff8801b6e8a000 [ 279.110186] RIP: dnet_select_source.isra.25 (net/decnet/dn_route.c:926) [ 279.110186] RSP: 0018:ffff8801b6e8bc88 EFLAGS: 00010202 [ 279.110186] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000001 [ 279.110186] RDX: 0000000000000001 RSI: ffffffffa9e88100 RDI: 0000000000000282 [ 279.110186] RBP: ffff8801b6e8bcb8 R08: 0000000000000001 R09: ffff880196c60cf0 [ 279.110186] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8801b6e8be18 [ 279.110186] R13: 0000000000000000 R14: 00000000000000fe R15: 0000000000000000 [ 279.110186] FS: 00007f333a961700(0000) GS:ffff880063000000(0000) knlGS:0000000000000000 [ 279.110186] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 279.110186] CR2: 0000000000000000 CR3: 000000019cc2d000 CR4: 00000000000006a0 [ 279.110186] DR0: 0000000000696000 DR1: 0000000000696000 DR2: 0000000000696000 [ 279.110186] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 [ 279.110186] Stack: [ 279.110186] ffffffffa82c3225 ffffffffa507aac5 ffff880436a39160 ffff8801b6e8be18 [ 279.110186] 0000000000000000 ffff8800c5dc7408 ffff8801b6e8bd68 ffffffffa82c5803 [ 279.110186] ffff880196c60000 0000000000000007 0000000000000006 0000000000000082 [ 279.110186] Call Trace: [ 279.110186] ? dnet_select_source.isra.25 (net/decnet/dn_route.c:916) [ 279.110186] ? sched_clock (arch/x86/include/asm/paravirt.h:192 arch/x86/kernel/tsc.c:305) [ 279.110186] dn_route_output_slow (net/decnet/dn_route.c:1042) [ 279.110186] __dn_route_output_key (net/decnet/dn_route.c:1267) [ 279.110186] ? __dn_route_output_key (include/linux/bottom_half.h:19 include/linux/rcupdate.h:850 net/decnet/dn_route.c:1249) [ 279.110186] dn_route_output_sock (net/decnet/dn_route.c:1290) [ 279.110186] __dn_connect (net/decnet/af_decnet.c:954) [ 279.110186] ? __local_bh_enable_ip (arch/x86/include/asm/paravirt.h:819 kernel/softirq.c:171) [ 279.110186] ? dn_connect (net/decnet/af_decnet.c:979) [ 279.110186] dn_connect (net/decnet/af_decnet.c:980) [ 279.110186] SYSC_connect (net/socket.c:1701) [ 279.110186] ? trace_hardirqs_on (kernel/locking/lockdep.c:2607) [ 279.110186] ? syscall_trace_enter (include/linux/context_tracking.h:27 arch/x86/kernel/ptrace.c:1461) [ 279.110186] SyS_connect (net/socket.c:1683) [ 279.110186] tracesys (arch/x86/kernel/entry_64.S:749) [ 279.110186] Code: fc 85 c0 75 26 48 c7 c2 68 bf 69 a9 be 9d 03 00 00 48 c7 c7 b7 61 c7 a9 c6 05 42 4c cc 02 01 e8 1f cb ef fc 0f 1f 80 00 00 00 00 <48> 8b 1b e8 60 84 f1 fc 85 c0 74 5c 80 3d 24 4c cc 02 00 75 53 [ 279.110186] RIP dnet_select_source.isra.25 (net/decnet/dn_route.c:926) [ 279.110186] RSP Thanks, Sasha -- 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/