Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755689Ab0LRLli (ORCPT ); Sat, 18 Dec 2010 06:41:38 -0500 Received: from payne.is.scarlet.be ([193.74.71.226]:38037 "EHLO payne.is.scarlet.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755357Ab0LRLlh (ORCPT ); Sat, 18 Dec 2010 06:41:37 -0500 X-Greylist: delayed 498 seconds by postgrey-1.27 at vger.kernel.org; Sat, 18 Dec 2010 06:41:36 EST Message-ID: <4D0C9BFA.4080003@scarlet.be> Date: Sat, 18 Dec 2010 11:33:14 +0000 From: Joel Soete User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.1.15) Gecko/20101030 Icedove/3.0.10 MIME-Version: 1.0 To: Linux Kernel Subject: Help: major pppoe regression since 2.6.35 (panic on first ppp conection)? Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6667 Lines: 85 Hello all, Since a year now, I installed my favorite Debian testing on my new X86_64 platform on which I like to run my personal kernel config. And all was working fine since 2.6.35 was released. The first time I experiment this issue, it was during a test of Ubuntu upgrade to the latest release 10.10 against which I open this bug report : in short the system panicing on first connection to my ISP. This still occurs to me on the latest ubuntu stock linux image 2.6.35 as well as on my personal config from vanilla sources. As in general this kind of problem is quickly identified and solved, I do some more test with 2.6.36 and even 2.6.37-rc? releases, in smp or up config, with or without netfilter, with or without foreign nvidia graphical driver but this issue is still there for me? Obviously, I also do some researches with google but without a lot of success. So I try to figure out when this pb appears in the development history and find out that it was already in 2.6.35-rc1. So I do more kind of rewind in time and all was working fine since 2.6.34-git5 but problems appears in 2.6.34-git[67]. For my pppoe issue, there are few changes that I tried to revert without success? The latest related stuff I can discovered is this regression report 2.6.35 -> 2.6.36 and the debugging patch proposed by Jarek Poplawski effectively drops the ppp interface but the system doesn't panic any more, so can I get following kernel log: Dec 17 17:26:53 sidh2 kernel: [ 25.941424] eth1: Link up Dec 17 17:26:53 sidh2 kernel: [ 25.941736] eth1: Link changed: 10Mbps, half duplex Dec 17 17:26:53 sidh2 kernel: [ 26.266657] r8169 0000:08:00.0: eth0: link up Dec 17 17:26:53 sidh2 kernel: [ 26.266662] r8169 0000:08:00.0: eth0: link up Dec 17 17:26:53 sidh2 kernel: [ 26.829432] ip_tables: (C) 2000-2006 Netfilter Core Team Dec 17 17:26:58 sidh2 kernel: [ 33.017352] ppdev: user-space parallel port driver Dec 17 17:27:04 sidh2 kernel: [ 36.357885] eth0: no IPv6 routers present Dec 17 17:27:04 sidh2 kernel: [ 36.517833] eth1: no IPv6 routers present Dec 17 17:28:12 sidh2 kernel: [ 106.511762] BUG: unable to handle kernel NULL pointer dereference at (null) Dec 17 17:28:12 sidh2 kernel: [ 106.511952] IP: [] put_page+0x1b/0x180 Dec 17 17:28:12 sidh2 kernel: [ 106.512078] PGD 13c6f0067 PUD 134283067 PMD 0 Dec 17 17:28:12 sidh2 kernel: [ 106.512293] Oops: 0000 [#1] SMP Dec 17 17:28:12 sidh2 kernel: [ 106.512456] last sysfs file: /sys/devices/virtual/sound/timer/uevent Dec 17 17:28:12 sidh2 kernel: [ 106.512533] CPU 4 Dec 17 17:28:12 sidh2 kernel: [ 106.512584] Modules linked in: ppdev xt_TCPMSS xt_tcpmss xt_tcpudp iptable_mangle ip_tables x_tables lp nvidia(P) parport_pc parport agpgart i7core_edac edac_core tpm_tis tpm tpm_bios [last unloaded: scsi_wait_scan] Dec 17 17:28:12 sidh2 kernel: [ 106.513674] Dec 17 17:28:12 sidh2 kernel: [ 106.513742] Pid: 1821, comm: pppd Tainted: P 2.6.35-amd64-t3 #5 EX58-UD3R/EX58-UD3R Dec 17 17:28:12 sidh2 kernel: [ 106.513838] RIP: 0010:[] [] put_page+0x1b/0x180 Dec 17 17:28:12 sidh2 kernel: [ 106.513982] RSP: 0018:ffff88013cecfe08 EFLAGS: 00010292 Dec 17 17:28:12 sidh2 kernel: [ 106.514056] RAX: 0000000000000030 RBX: 0000000000000000 RCX: 0000000000001733 Dec 17 17:28:12 sidh2 kernel: [ 106.514134] RDX: ffff88013c906640 RSI: ffff88013c906060 RDI: 0000000000000000 Dec 17 17:28:12 sidh2 kernel: [ 106.514211] RBP: ffff88013c86e900 R08: ffffffff81342b90 R09: 00000000ffe22e08 Dec 17 17:28:12 sidh2 kernel: [ 106.514288] R10: ffff88013cece000 R11: 0000000000000000 R12: 00000000080d5f42 Dec 17 17:28:12 sidh2 kernel: [ 106.514366] R13: ffff88013c86f400 R14: 000000000000000a R15: 00000000000005de Dec 17 17:28:12 sidh2 kernel: [ 106.514444] FS: 0000000000000000(0000) GS:ffff880001f00000(0063) knlGS:00000000f75f5b20 Dec 17 17:28:12 sidh2 kernel: [ 106.514539] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b Dec 17 17:28:12 sidh2 kernel: [ 106.514614] CR2: 0000000000000000 CR3: 000000013c758000 CR4: 00000000000006e0 Dec 17 17:28:12 sidh2 kernel: [ 106.514692] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Dec 17 17:28:12 sidh2 kernel: [ 106.514769] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Dec 17 17:28:12 sidh2 kernel: [ 106.514847] Process pppd (pid: 1821, threadinfo ffff88013cece000, task ffff88013c7ea120) Dec 17 17:28:12 sidh2 kernel: [ 106.514941] Stack: Dec 17 17:28:12 sidh2 kernel: [ 106.515008] 0000000000000000 0000000000000001 ffff88013c86e900 00000000080d5f42 Dec 17 17:28:12 sidh2 kernel: [ 106.515227] <0> ffff88013c86f400 ffffffff814288b7 ffff88013c523c00 ffff88013c86e900 Dec 17 17:28:12 sidh2 kernel: [ 106.515556] <0> ffff88013c523c00 ffffffff814283c1 ffff88013c86e900 ffffffff81342d1c Dec 17 17:28:12 sidh2 kernel: [ 106.515948] Call Trace: Dec 17 17:28:12 sidh2 kernel: [ 106.516022] [] ? skb_release_data+0x77/0xd0 Dec 17 17:28:12 sidh2 kernel: [ 106.516099] [] ? __kfree_skb+0x11/0x90 Dec 17 17:28:12 sidh2 kernel: [ 106.516176] [] ? ppp_read+0x18c/0x210 Dec 17 17:28:12 sidh2 kernel: [ 106.516252] [] ? default_wake_function+0x0/0x20 Dec 17 17:28:12 sidh2 kernel: [ 106.516329] [] ? vfs_read+0xb5/0x1a0 Dec 17 17:28:12 sidh2 kernel: [ 106.516404] [] ? sys_read+0x4e/0x90 Dec 17 17:28:12 sidh2 kernel: [ 106.516479] [] ? compat_sys_gettimeofday+0x9f/0xb0 Dec 17 17:28:12 sidh2 kernel: [ 106.516558] [] ? sysenter_dispatch+0x7/0x2e Dec 17 17:28:12 sidh2 kernel: [ 106.516632] Code: cc bb f8 ff 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 5c 24 08 48 89 6c 24 10 48 89 fb 4c 89 64 24 18 4c 89 6c 24 20 <48> 8b 07 66 a9 00 c0 0f 85 13 01 00 00 f0 ff 4f 08 0f 94 c0 84 Dec 17 17:28:12 sidh2 kernel: [ 106.519823] RIP [] put_page+0x1b/0x180 Dec 17 17:28:12 sidh2 kernel: [ 106.519945] RSP Dec 17 17:28:12 sidh2 kernel: [ 106.520015] CR2: 0000000000000000 Dec 17 17:28:12 sidh2 kernel: [ 106.520093] ---[ end trace bac76655d5f488ec ]--- Sorry but I don't have enough knowledge to understand this pb, so all help will be appreciated. Tia, J. -- 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/