Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753690AbYFLFPL (ORCPT ); Thu, 12 Jun 2008 01:15:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751385AbYFLFO6 (ORCPT ); Thu, 12 Jun 2008 01:14:58 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:57116 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751260AbYFLFO5 (ORCPT ); Thu, 12 Jun 2008 01:14:57 -0400 Date: Wed, 11 Jun 2008 22:13:24 -0700 From: Andrew Morton To: Nadia Derbey , Manfred Spraul , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, Pekka Enberg , Christoph Lameter Subject: repeatable slab corruption with LTP msgctl08 Message-Id: <20080611221324.42270ef2.akpm@linux-foundation.org> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2651 Lines: 62 Running current mainline on my old 2-way PIII. Distro is RH FC1. LTP version is ltp-full-20070228 (lots of retro-computing there). Config is at http://userweb.kernel.org/~akpm/config-vmm.txt ./testcases/bin/msgctl08 crashes after ten minutes or so: slab: Internal list corruption detected in cache 'size-128'(26), slabp f2905000(20). Hexdump: 000: 00 e0 12 f2 88 32 c0 f7 88 00 00 00 88 50 90 f2 010: 14 00 00 00 0f 00 00 00 00 00 00 00 ff ff ff ff 020: fd ff ff ff fd ff ff ff fd ff ff ff fd ff ff ff 030: fd ff ff ff fd ff ff ff fd ff ff ff fd ff ff ff 040: fd ff ff ff fd ff ff ff 00 00 00 00 fd ff ff ff 050: fd ff ff ff fd ff ff ff 19 00 00 00 17 00 00 00 060: fd ff ff ff fd ff ff ff 0b 00 00 00 fd ff ff ff 070: fd ff ff ff fd ff ff ff fd ff ff ff fd ff ff ff 080: 10 00 00 00 ------------[ cut here ]------------ kernel BUG at mm/slab.c:2949! invalid opcode: 0000 [#1] SMP Modules linked in: Pid: 3348, comm: msgctl08 Not tainted (2.6.26-rc5 #1) EIP: 0060:[] EFLAGS: 00010086 CPU: 0 EIP is at check_slabp+0xeb/0x100 EAX: 00000001 EBX: f2905083 ECX: 00000001 EDX: f20ee670 ESI: f2905000 EDI: 00000084 EBP: f4671e88 ESP: f4671e64 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process msgctl08 (pid: 3348, ti=f4670000 task=f20ee670 task.ti=f4670000) Stack: c0472f2b 00000000 0000001a f2905000 00000014 f7c01500 ffffffff 0000000e f2905000 f4671eec c017b69f 00000010 000000d0 f20ee670 f7c032ac 000000d0 f7c01500 0000000e f7c03288 f7c06df0 f29ec088 00000098 00000000 00000000 Call Trace: [] ? cache_alloc_refill+0xcf/0x6b0 [] ? __kmalloc+0x154/0x160 [] ? load_msg+0x33/0x150 [] ? load_msg+0x33/0x150 [] ? do_msgsnd+0x17b/0x2e0 [] ? do_msgsnd+0x49/0x2e0 [] ? __do_softirq+0x6f/0x100 [] ? _local_bh_enable+0x48/0xa0 [] ? sys_msgsnd+0x32/0x40 [] ? sys_ipc+0xb2/0x240 [] ? sysenter_past_esp+0xa5/0xb1 [] ? sysenter_past_esp+0x6a/0xb1 ======================= Code: 86 fa ff 8b 55 f0 8b 42 38 8d 04 85 1c 00 00 00 39 f8 76 0b 43 f7 c7 0f 00 00 00 75 d2 eb bd c7 04 24 2b 2f 47 c0 e8 85 86 fa ff <0f> 0b eb fe 83 c4 18 5b 5e 5f 5d c3 8b 56 10 e9 6b ff ff ff 90 EIP: [] check_slabp+0xeb/0x100 SS:ESP 0068:f4671e64 ---[ end trace d7a2cbbb5a3654be ]--- Pekka (or Christoph): could you please decrypt the slab bits for us? Thanks. -- 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/