From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754532AbYIZPSV (ORCPT ); Fri, 26 Sep 2008 11:18:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752179AbYIZPSO (ORCPT ); Fri, 26 Sep 2008 11:18:14 -0400 Received: from ug-out-1314.google.com ([66.249.92.175]:55740 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752171AbYIZPSM (ORCPT ); Fri, 26 Sep 2008 11:18:12 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mime-version:content-type :content-disposition:user-agent; b=i7h1M6h9JRLF9iErhoHnCK/gevYFPENlCPIWL4sLwnCEcm0PX3ZNI14hTzFKPPXpqM kc9wiyZGxU9VIxaJ61Ek++RA1aK/TVFFhYf/16eXVaQAgqEOTX2uV8zzZaymU3oeaaY8 P5duzG1yJogpSZtb44S1QoF12DkIHdNMAXs+c= Date: Fri, 26 Sep 2008 19:20:31 +0400 From: Alexey Dobriyan To: viro@zeniv.linux.org.uk, ebiederm@xmission.com Cc: akpm@osdl.org, torvalds@osdl.org, linux-kernel@vger.kernel.org Subject: 2.6.27-rc7-sha1: EIP at proc_sys_compare+0x36/0x50 Message-ID: <20080926152031.GA30831@x200.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Gentlemen, this happened while script was slowly rebuilding 300+ configs sequentially. Very little recompling activity itself, much seeking. This is first time I see this. No debugging was on, no preemption. Version: 2.6.27-rc7-c0f4d6d4b14a75a341d972ff73fb9740e1ceb634 + atl1 fixlet + "notes" kobject fixlet, but they don't matter. ffffffff802bc690 : ffffffff802bc690: 48 83 ec 08 sub $0x8,%rsp ffffffff802bc694: 8b 46 04 mov 0x4(%rsi),%eax ffffffff802bc697: 3b 42 04 cmp 0x4(%rdx),%eax ffffffff802bc69a: 49 89 f0 mov %rsi,%r8 ffffffff802bc69d: 74 11 je ffffffff802bc6b0 ffffffff802bc69f: b8 01 00 00 00 mov $0x1,%eax ffffffff802bc6a4: 48 83 c4 08 add $0x8,%rsp ffffffff802bc6a8: c3 retq ffffffff802bc6a9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) ffffffff802bc6b0: 48 8b 76 08 mov 0x8(%rsi),%rsi ffffffff802bc6b4: 48 8b 7a 08 mov 0x8(%rdx),%rdi ffffffff802bc6b8: 89 c1 mov %eax,%ecx ffffffff802bc6ba: fc cld ffffffff802bc6bb: 48 39 c9 cmp %rcx,%rcx ffffffff802bc6be: f3 a6 repz cmpsb %es:(%rdi),%ds:(%rsi) ffffffff802bc6c0: 75 dd jne ffffffff802bc69f ffffffff802bc6c2: 49 8b 40 e0 mov -0x20(%r8),%rax ffffffff802bc6c6: ===> 48 8b 78 f0 mov -0x10(%rax),%rdi <=== ffffffff802bc6ca: e8 71 96 f7 ff callq ffffffff80235d40 ffffffff802bc6cf: 85 c0 test %eax,%eax ffffffff802bc6d1: 0f 94 c0 sete %al ffffffff802bc6d4: 48 83 c4 08 add $0x8,%rsp ffffffff802bc6d8: 0f b6 c0 movzbl %al,%eax ffffffff802bc6db: c3 retq ffffffff802bc6dc: 0f 1f 40 00 nopl 0x0(%rax) [16526.029537] BUG: unable to handle kernel paging request at fffffffffffffff0 [16526.029643] IP: [] proc_sys_compare+0x36/0x50 [16526.029709] PGD 203067 PUD 204067 PMD 0 [16526.029769] Oops: 0000 [1] SMP [16526.029824] CPU 1 [16526.029872] Modules linked in: af_packet iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack xt_tcpudp iptable_filter ip_tables x_tables ext2 nls_utf8 ntfs fuse sr_mod cdrom [16526.030079] Pid: 20385, comm: sh Not tainted 2.6.27-rc7 #1 [16526.030140] RIP: 0010:[] [] proc_sys_compare+0x36/0x50 [16526.030246] RSP: 0018:ffff880108929c58 EFLAGS: 00010246 [16526.030306] RAX: 0000000000000000 RBX: ffff88005246e000 RCX: 0000000000000000 [16526.030374] RDX: ffff880108929d28 RSI: ffff88005246e0af RDI: ffff88017b4fb01c [16526.030442] RBP: ffff88005246e018 R08: ffff88005246e030 R09: ffff88017b4fb011 [16526.030509] R10: 0000000000000000 R11: 0000000000000005 R12: 0000000032fdb346 [16526.030577] R13: ffff88005246e0c8 R14: ffff880108929d28 R15: 000000000000000b [16526.030645] FS: 00002b014ad9af40(0000) GS:ffff88017f809680(0000) knlGS:0000000000000000 [16526.030748] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [16526.030811] CR2: fffffffffffffff0 CR3: 000000006a2d6000 CR4: 00000000000006e0 [16526.030879] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [16526.030946] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [16526.031014] Process sh (pid: 20385, threadinfo ffff880108928000, task ffff88017f8bab80) [16526.031118] Stack: 0000000000000000 ffffffff80293242 0000000080555ec0 0000000b7f429320 [16526.031233] ffff88017b4fb011 ffff880108929d28 ffff88017b4fb01c ffff880108929e68 [16526.031345] ffff880108929d28 ffff880108929d38 ffff88017b4fb000 ffffffff8028900c [16526.031419] Call Trace: [16526.031506] [] ? __d_lookup+0xe2/0x120 [16526.031568] [] ? do_lookup+0x3c/0x220 [16526.031629] [] ? __link_path_walk+0x815/0xd90 [16526.031693] [] ? __do_fault+0x1b7/0x400 [16526.031755] [] ? path_walk+0x54/0xb0 [16526.033334] [] ? do_path_lookup+0x7a/0x150 [16526.033397] [] ? __path_lookup_intent_open+0x6a/0xd0 [16526.033464] [] ? do_filp_open+0xc2/0x820 [16526.033526] [] ? alloc_fd+0x3f/0x130 [16526.033587] [] ? do_sys_open+0x58/0xb0 [16526.033648] [] ? system_call_fastpath+0x16/0x1b [16526.033711] [16526.033754] [16526.033797] Code: 89 f0 74 11 b8 01 00 00 00 48 83 c4 08 c3 0f 1f 80 00 00 00 00 48 8b 76 08 48 8b 7a 08 89 c1 fc 48 39 c9 f3 a6 75 dd 49 8b 40 e0 <48> 8b 78 f0 e8 71 96 f7 ff 85 c0 0f 94 c0 48 83 c4 08 0f b6 c0 [16526.034186] RIP [] proc_sys_compare+0x36/0x50 [16526.034251] RSP [16526.034301] CR2: fffffffffffffff0 [16526.034622] ---[ end trace ca38d5cc981185f5 ]---