Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756812Ab1E3Mzw (ORCPT ); Mon, 30 May 2011 08:55:52 -0400 Received: from mail-yi0-f46.google.com ([209.85.218.46]:55986 "EHLO mail-yi0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753309Ab1E3Mzu convert rfc822-to-8bit (ORCPT ); Mon, 30 May 2011 08:55:50 -0400 MIME-Version: 1.0 Date: Mon, 30 May 2011 14:55:49 +0200 Message-ID: Subject: Invalid credentials ( __validate_creds()) due to cred->magic == "DeaD" from sys_clone() (2.6.39 PREEMPT SMP SELinux kernel) From: =?UTF-8?B?Um9iZXJ0IMWad2nEmWNraQ==?= To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5543 Lines: 132 Just some initial data: ===================================================================== KDB ===================================================================== <3>[49754.391126] CRED: Invalid credentials <3>[49754.394811] CRED: At include/linux/cred.h:260 <3>[49754.399181] CRED: Specified credentials: ffff8801156c8b00 <3>[49754.404676] CRED: ->magic=44656144, put_addr=ffffffff81166dc5 <3>[49754.410430] CRED: ->usage=0, subscr=0 <3>[49754.414102] CRED: ->*uid = { 65534,65534,65534,65534 } <3>[49754.419250] CRED: ->*gid = { 65534,65534,65534,65534 } <3>[49754.424397] CRED: ->security is ffff8801113069c0 <3>[49754.429021] CRED: ->security {1, 1} [1]kdb> bt Stack traceback for pid 16009 0xffff880115819770 16009 8897 1 1 R 0xffff880115819bf0 *iknowthis2 ffff88012bc43e00 0000000000000000 ffff880100000104 ffffffff8267436f ffffffff81b611cd ffff8801156c8b00 ffff88012bc43e40 ffffffff81166d8e ffff8801156c8b00 ffff880121e13540 ffff88012bc43e60 ffffffff81166db3 Call Trace: [] ? wq_free_rcu+0x12/0x14 [] ? __validate_creds.clone.9+0x2d/0x32 [] ? file_free_rcu+0x20/0x46 [] ? __rcu_process_callbacks+0x18d/0x2af [] ? rcu_process_callbacks+0x80/0x87 [] ? __do_softirq+0xeb/0x1cc [] ? native_sched_clock+0x35/0x37 [] ? sched_clock_local+0x12/0x75 [] ? call_softirq+0x1c/0x30 [] ? do_softirq+0x4b/0x9f [] ? irq_exit+0x5f/0xb6 [] ? smp_apic_timer_interrupt+0x7d/0x8b [] ? apic_timer_interrupt+0x13/0x20 [] ? dup_mm+0x1f2/0x468 [] ? arch_local_irq_restore+0x6/0xd [] ? __slab_alloc.clone.36+0xf0/0x38b [] ? dup_mm+0x1f2/0x468 [] ? kmem_cache_alloc+0x4a/0xe7 [] ? selinux_vm_enough_memory+0x48/0x4d [] ? dup_mm+0x1f2/0x468 [] ? copy_process+0xa3e/0x1230 [] ? do_fork+0x10f/0x29d [] ? trace_hardirqs_off_thunk+0x3a/0x6c [] ? sys32_clone+0x26/0x28 [] ? ia32_ptregs_common+0x25/0x4b kdb> summary sysname Linux release 2.6.39 version #3 SMP PREEMPT Fri May 27 15:27:03 CEST 2011 machine x86_64 nodename ise-test domainname (none) ccversion CCVERSION date 2011-05-28 03:20:03 tz_minuteswest -120 uptime 13:49 load avg 19.38 20.17 22.96 MemTotal: 993059 kB MemFree: 458493 kB Buffers: 23981 kB ===================================================================== KGDB ===================================================================== (gdb) bt #0 __invalid_creds (cred=0xffff8801156c8b00, file=, line=) at kernel/cred.c:812 #1 0xffffffff81166d8e in __validate_creds (cred=0xffff8801156c8b00, line=260, file=0xffffffff8267436f "include/linux/cred.h") at include/linux/cred.h:186 #2 0xffffffff81166db3 in put_cred (head=) at include/linux/cred.h:260 #3 file_free_rcu (head=) at fs/file_table.c:49 #4 0xffffffff810eeb82 in rcu_do_batch (rsp=0xffffffff82a2f500, rdp=0xffff88012bc502f0) at kernel/rcutree.c:1146 #5 __rcu_process_callbacks (rsp=0xffffffff82a2f500, rdp=0xffff88012bc502f0) at kernel/rcutree.c:1386 #6 0xffffffff810eed24 in rcu_preempt_process_callbacks (unused=) at kernel/rcutree_plugin.h:544 #7 rcu_process_callbacks (unused=) at kernel/rcutree.c:1404 #8 0xffffffff8109c013 in __do_softirq () at kernel/softirq.c:238 #9 0xffffffff81edbd9c in ?? () at arch/x86/kernel/entry_64.S:1210 #10 0xffffffff81040510 in do_softirq () at arch/x86/kernel/irq_64.c:80 #11 0xffffffff8109c380 in invoke_softirq () at kernel/softirq.c:325 #12 irq_exit () at kernel/softirq.c:340 #13 0xffffffff81edc6d1 in smp_apic_timer_interrupt (regs=) at arch/x86/kernel/apic/apic.c:861 #14 #15 0x00cf9b000000ffff in __brk_reservation_fn_dmi_alloc__ () Cannot access memory at address 0xcffb000000ffff Cannot access memory at address 0xcffb000000ffff (gdb) up #1 0xffffffff81166d8e in __validate_creds (cred=0xffff8801156c8b00, line=260, file=0xffffffff8267436f "include/linux/cred.h") at include/linux/cred.h:186 186 __invalid_creds(cred, file, line); (gdb) p *cred $1 = {usage = {counter = 0}, subscribers = {counter = 0}, put_addr = 0xffffffff81166dc5, magic = 1147494724, uid = 65534, gid = 65534, suid = 65534, sgid = 65534, euid = 65534, egid = 65534, fsuid = 65534, fsgid = 65534, securebits = 0, cap_inheritable = {cap = {0, 0}}, cap_permitted = {cap = {0, 0}}, cap_effective = {cap = {0, 0}}, cap_bset = {cap = {4294967295, 4294967295}}, jit_keyring = 0 '\000', thread_keyring = 0x0, request_key_auth = 0x0, tgcred = 0xffff88011492b088, security = 0xffff8801113069c0, user = 0xffff880121c4b000, user_ns = 0xffffffff82a21a80, group_info = 0xffff880104cec420, rcu = {next = 0x0, func = 0xffffffff810b6c97 }} (gdb) p (char[4])cred->magic $8 = "DaeD" -- Robert Święcki -- 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/