Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756170Ab2FPSng (ORCPT ); Sat, 16 Jun 2012 14:43:36 -0400 Received: from catastrophix.ugh.no ([178.79.162.34]:55255 "EHLO catastrophix.ugh.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752718Ab2FPSne (ORCPT ); Sat, 16 Jun 2012 14:43:34 -0400 Message-ID: <4FDCD3C7.5080503@tomt.net> Date: Sat, 16 Jun 2012 20:43:19 +0200 From: Andre Tomt User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: Linux-NFS CC: Fengguang Wu , David Howells , LKML Subject: Re: BUG in __key_instantiate_and_link(): unable to handle kernel paging request at 0000632e6472616f References: <20120601034114.GA9248@localhost> <4FDBF056.7040404@tomt.net> In-Reply-To: <4FDBF056.7040404@tomt.net> 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: 4808 Lines: 95 On 16. juni 2012 04:32, Andre Tomt wrote: > FWIW; I am (still) seeing this exact same crash several times an hour on > 3.4.3-rc1 on Ubuntu 12.04 client. Only that the same second it happens, > all my three displays corrupts badly, becoming completely unreadable. > Switching to console and back usually gets my desktop back on two of > three displays, and sometimes it will need a full xserver restart. > Obviously some memory corruption going on. > > One of the crashes also triggered a NX error: > [20292.196332] kernel tried to execute NX-protected page - exploit > attempt? (uid: 0) > > And after a while, things start locking up. > > It didn't really start happening until a few days ago though, I've been > running 3.4 for since some -rc through all the stable releases. Perhaps > server suddenly got a working idmapper or something? Its a debian > unstable updated a couple times a month. > > Booting latest git master now, to see if any of the recent NFS fixes > just pulled by Linus fixes anything (-rc2 had other showstopper nfs > issues). Just had it happen with 3.5-git as of a couple hours ago (last commit a2c2df8672f55195f101d9251117aa59e358d296): Jun 16 19:01:49 slurv kernel: [50823.271618] general protection fault: 0000 [#1] SMP Jun 16 19:01:49 slurv kernel: [50823.271640] CPU 10 Jun 16 19:01:49 slurv kernel: [50823.271690] Jun 16 19:01:49 slurv kernel: [50823.271698] Pid: 1678, comm: rpc.idmapd Not tainted 3.5.0-1-desktop #1 System manufacturer System Product Name/P6T DELUXE V2 Jun 16 19:01:49 slurv kernel: [50823.271738] RIP: 0010:[] [] __key_instantiate_and_link+0x52/0xcb Jun 16 19:01:49 slurv kernel: [50823.271767] RSP: 0018:ffff88061941bd38 EFLAGS: 00010246 Jun 16 19:01:49 slurv kernel: [50823.271785] RAX: 6337346330366233 RBX: ffff880606fb97f0 RCX: 0000000000000000 Jun 16 19:01:49 slurv kernel: [50823.271807] RDX: 0000000000000006 RSI: ffff88061941be85 RDI: ffff880606fb97f0 Jun 16 19:01:49 slurv kernel: [50823.271829] RBP: ffff88061941bd88 R08: ffff8802bc9ed380 R09: ffff88061941bdb0 Jun 16 19:01:49 slurv kernel: [50823.271850] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88061aad63c0 Jun 16 19:01:49 slurv kernel: [50823.271872] R13: ffff8802bc9ed380 R14: 0000000000000000 R15: ffff88061941bdb0 Jun 16 19:01:49 slurv kernel: [50823.271894] FS: 00007fd449a7d700(0000) GS:ffff88063fd40000(0000) knlGS:0000000000000000 Jun 16 19:01:49 slurv kernel: [50823.271919] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jun 16 19:01:49 slurv kernel: [50823.271937] CR2: 00007f8844002028 CR3: 000000061be95000 CR4: 00000000000007e0 Jun 16 19:01:49 slurv kernel: [50823.271959] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Jun 16 19:01:49 slurv kernel: [50823.271980] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Jun 16 19:01:49 slurv kernel: [50823.272003] Process rpc.idmapd (pid: 1678, threadinfo ffff88061941a000, task ffff88061b870000) Jun 16 19:01:49 slurv kernel: [50823.272028] Stack: Jun 16 19:01:49 slurv kernel: [50823.272036] ffff88061941bd78 0000000000000006 ffff88061941be85 fffffff01aad63e8 Jun 16 19:01:49 slurv kernel: [50823.272060] ffff880606fb9840 ffff880606fb97f0 ffff88061aad63c0 0000000000000006 Jun 16 19:01:49 slurv kernel: [50823.272083] ffff88061941be85 00007fffe09c4500 ffff88061941bdd8 ffffffff81129943 Jun 16 19:01:49 slurv kernel: [50823.272106] Call Trace: Jun 16 19:01:49 slurv kernel: [50823.272116] [] key_instantiate_and_link+0x58/0x80 Jun 16 19:01:49 slurv kernel: [50823.272145] [] idmap_pipe_downcall+0x154/0x1ad [nfs] Jun 16 19:01:49 slurv kernel: [50823.272173] [] rpc_pipe_write+0x56/0x6f [sunrpc] Jun 16 19:01:49 slurv kernel: [50823.272195] [] vfs_write+0xad/0x13d Jun 16 19:01:49 slurv kernel: [50823.272212] [] sys_write+0x45/0x6c Jun 16 19:01:49 slurv kernel: [50823.272229] [] system_call_fastpath+0x16/0x1b Jun 16 19:01:49 slurv kernel: [50823.272258] Code: 48 89 55 b8 48 89 75 c0 e8 16 e4 1d 00 48 8b 43 78 c7 45 cc f0 ff ff ff 48 8b 55 b8 48 8b 75 c0 a8 01 75 4f 48 8b 43 20 48 89 df 50 18 85 c0 89 45 cc 75 3e 48 8b 43 48 f0 ff 40 44 f0 80 4b Jun 16 19:01:49 slurv kernel: [50823.272317] RIP [] __key_instantiate_and_link+0x52/0xcb Jun 16 19:01:49 slurv kernel: [50823.272339] RSP Jun 16 19:01:49 slurv kernel: [50823.279199] ---[ end trace 25122b5e9d0b0c76 ]--- It did take a while this time. -- 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/