Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932830AbZJFOio (ORCPT ); Tue, 6 Oct 2009 10:38:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932784AbZJFOio (ORCPT ); Tue, 6 Oct 2009 10:38:44 -0400 Received: from mail-qy0-f173.google.com ([209.85.221.173]:42119 "EHLO mail-qy0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932698AbZJFOin (ORCPT ); Tue, 6 Oct 2009 10:38:43 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=LRNY2rk1tpoQFlWApucJIwhp4tE45NGrbLe3EuvFDJtdz9aJtFQqdRjP/yl2dFshkE jGAueZ+S2NMzUzz4K//qMmcfHK0c8nlO+wqu3WgKgJyTwPW24CHuC5mnwC+7QdRhwylh w+vBBy94V+D76Rq1WF3oS3joOlfHoJ4uvvkvg= MIME-Version: 1.0 Date: Tue, 6 Oct 2009 09:38:05 -0500 Message-ID: <632b79000910060738l5ed0dd6ch60b4569d87d2ef0e@mail.gmail.com> Subject: kernel NULL pointer dereference/ kvm subsystem From: Don Dupuis To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4007 Lines: 80 Kernel 2.6.31.2 x86 64bit Running numerous kvm linux guests and noticed this oops in messages file. This didn't occur in 2.6.30.6 BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 IP: [] kpit_elapsed+0x30/0x60 [kvm] PGD 219c20067 PUD 219c1f067 PMD 0 Oops: 0000 [#1] SMP last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map CPU 6 Modules linked in: nfs fscache tun ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables nfsd nfs_acl auth_rpcgss exportfs autofs4 hidp rfcomm l2cap bluetooth rfkill lockd sunrpc bridge stp ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 iscsi_tcp cxgb3i cxgb3 mdio libiscsi_tcp libiscsi scsi_transport_iscsi dm_mirror dm_multipath scsi_dh video output sbs sbshc battery acpi_memhotplug ac parport_pc lp parport kvm_intel kvm joydev sg sr_mod e1000e button cdrom serio_raw dcdbas rtc_cmos rtc_core rtc_lib pcspkr dm_region_hash dm_log dm_mod ata_piix libata shpchp mptsas mptscsih mptbase scsi_transport_sas sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd [last unloaded: microcode] Pid: 5677, comm: qemu-kvm Not tainted 2.6.31.2 #1 PowerEdge R710 RIP: 0010:[] [] kpit_elapsed+0x30/0x60 [kvm] RSP: 0018:ffff88021808dc48 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00003977f71173c6 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff880219d11e60 RDI: ffff880218084000 RBP: ffff880219d11e60 R08: 0000000000000043 R09: 0000000000000008 R10: 0000000000000001 R11: ffffffffa01f6843 R12: ffff880218084000 R13: ffff880218084000 R14: 0000000000000007 R15: ffff880219d11f28 FS: 0000000041216940(0000) GS:ffffc90000c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b CR2: 0000000000000028 CR3: 0000000219cb0000 CR4: 00000000000026e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process qemu-kvm (pid: 5677, threadinfo ffff88021808c000, task ffff88022e14c0c0) Stack: 0000000000000007 ffff880219d11e60 0000000000000000 ffffffffa01de3e7 <0> ffff8802180916f8 ffff8802180916d8 ffff880219d11e60 0000000000000000 <0> ffff880218084000 ffffffffa01de49a 0000000000000000 ffff880219d11e60 Call Trace: [] ? pit_get_count+0x48/0xb4 [kvm] [] ? pit_latch_count+0x47/0x56 [kvm] [] ? pit_ioport_write+0xf8/0x18c [kvm] [] ? kvm_emulate_pio+0x1c8/0x1e8 [kvm] [] ? emulate_instruction+0x278/0x2a8 [kvm] [] ? kvm_get_apic_interrupt+0x4c/0x6b [kvm] [] ? __down_read+0x12/0x97 [] ? skip_emulated_instruction+0x1f/0x55 [kvm_intel] [] ? kvm_arch_vcpu_ioctl_run+0x86c/0xacd [kvm] [] ? cache_alloc_refill+0x120/0x1a0 [] ? apic_timer_interrupt+0xe/0x20 [] ? handle_io+0x0/0x63 [kvm_intel] [] ? kvm_vcpu_ioctl+0xf2/0x5a9 [kvm] [] ? apic_timer_interrupt+0xe/0x20 [] ? cap_file_ioctl+0x0/0x3 [] ? vfs_ioctl+0x21/0x6b [] ? do_vfs_ioctl+0x476/0x4cb [] ? sys_futex+0x116/0x134 [] ? sys_ioctl+0x51/0x70 [] ? apic_timer_interrupt+0xe/0x20 [] ? system_call_fastpath+0x16/0x1b Code: 48 83 ec 08 85 d2 75 40 48 8b af 30 2b 00 00 31 d2 48 83 c5 60 48 83 bd 98 00 00 00 00 74 35 48 8d 45 48 48 8b 58 18 48 8b 40 30 50 28 48 8b 95 98 00 00 00 48 29 c3 48 89 d1 48 89 d0 48 29 RIP [] kpit_elapsed+0x30/0x60 [kvm] RSP CR2: 0000000000000028 ---[ end trace 3e93dea7b5989be2 ]--- Thanks Don Dupuis -- 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/