Re: EPT: Misconfiguration

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On Sun, Feb 13, 2011 at 14:03, Avi Kivity <avi@xxxxxxxxxx> wrote:
> On 02/13/2011 04:07 AM, Ruben Kerkhof wrote:
>>
>> And tonight we had another one of those errors we had a few weeks ago:
>>
>> 2011-02-13T02:56:28.694496+01:00 phy005 kernel: EPT: Misconfiguration.
>> 2011-02-13T02:56:28.694908+01:00 phy005 kernel: EPT: GPA: 0x2edff000
>
> This GPA indexes into the 511th entry of the spte. ÂMarcelo, does this
> remind you of https://bugzilla.kernel.org/show_bug.cgi?id=27052 by any
> chance?
>
>> 2011-02-13T02:56:28.694914+01:00 phy005 kernel:
>> ept_misconfig_inspect_spte: spte 0x25602d007 level 4
>> 2011-02-13T02:56:28.694916+01:00 phy005 kernel:
>> ept_misconfig_inspect_spte: spte 0x3df3e2007 level 3
>> 2011-02-13T02:56:28.694919+01:00 phy005 kernel:
>> ept_misconfig_inspect_spte: spte 0x5e90c7007 level 2
>> 2011-02-13T02:56:28.694925+01:00 phy005 kernel:
>> ept_misconfig_inspect_spte: spte 0x1603a0730500d277 level 1
>
> Magic 1603a073........ pte.
>
>> 2011-02-13T02:56:28.694928+01:00 phy005 kernel:
>> ept_misconfig_inspect_spte: rsvd_bits = 0x3a00000000000
>> 2011-02-13T02:56:28.694930+01:00 phy005 kernel: ------------[ cut here
>> ]------------
>> 2011-02-13T02:56:28.694933+01:00 phy005 kernel: WARNING: at
>> arch/x86/kvm/vmx.c:3425 handle_ept_misconfig+0x152/0x1d8 [kvm_intel]()
>> 2011-02-13T02:56:28.694936+01:00 phy005 kernel: Hardware name: X8DTU
>> 2011-02-13T02:56:28.694941+01:00 phy005 kernel: Modules linked in: tun
>> ipmi_devintf ipmi_si ipmi_msghandler bridge 8021q garp stp llc bonding
>> xt_comment xt_recent ip6t_REJECT nf_conntrack_ipv6 ip6table_filter
>> ip6_tables ipv6 kvm_intel kvm i2c_i801 i2c_core iTCO_wdt igb ioatdma
>> dca iTCO_vendor_support joydev serio_raw microcode 3w_9xxx [last
>> unloaded: scsi_wait_scan]
>> 2011-02-13T02:56:28.695004+01:00 phy005 kernel: Pid: 4756, comm:
>> qemu-kvm Not tainted 2.6.34.7-66.tilaa.fc13.x86_64 #1
>> 2011-02-13T02:56:28.695008+01:00 phy005 kernel: Call Trace:
>> 2011-02-13T02:56:28.695013+01:00 phy005 kernel: [<ffffffff8104d11f>]
>> warn_slowpath_common+0x7c/0x94
>> 2011-02-13T02:56:28.695020+01:00 phy005 kernel: [<ffffffff8104d14b>]
>> warn_slowpath_null+0x14/0x16
>> 2011-02-13T02:56:28.695024+01:00 phy005 kernel: [<ffffffffa00c97fb>]
>> handle_ept_misconfig+0x152/0x1d8 [kvm_intel]
>> 2011-02-13T02:56:28.695028+01:00 phy005 kernel: [<ffffffffa00ca401>]
>> vmx_handle_exit+0x204/0x23a [kvm_intel]
>> 2011-02-13T02:56:28.695033+01:00 phy005 kernel: [<ffffffffa0084998>]
>> kvm_arch_vcpu_ioctl_run+0x7cd/0xa74 [kvm]
>> 2011-02-13T02:56:28.695037+01:00 phy005 kernel: [<ffffffffa00735ba>]
>> kvm_vcpu_ioctl+0xfd/0x56e [kvm]
>> 2011-02-13T02:56:28.695042+01:00 phy005 kernel: [<ffffffff810feaab>] ?
>> virt_to_head_page+0xe/0x2f
>> 2011-02-13T02:56:28.695046+01:00 phy005 kernel: [<ffffffff810cc6ca>] ?
>> mempool_kfree+0xe/0x10
>> 2011-02-13T02:56:28.695051+01:00 phy005 kernel: [<ffffffff810cc857>] ?
>> mempool_free+0x76/0x7b
>> 2011-02-13T02:56:28.695055+01:00 phy005 kernel: [<ffffffff8111aa2f>]
>> vfs_ioctl+0x32/0xa6
>> 2011-02-13T02:56:28.695060+01:00 phy005 kernel: [<ffffffff8111afa2>]
>> do_vfs_ioctl+0x483/0x4c9
>> 2011-02-13T02:56:28.695065+01:00 phy005 kernel: [<ffffffff8111b03e>]
>> sys_ioctl+0x56/0x79
>> 2011-02-13T02:56:28.695070+01:00 phy005 kernel: [<ffffffff81009c72>]
>> system_call_fastpath+0x16/0x1b
>> 2011-02-13T02:56:28.695074+01:00 phy005 kernel: ---[ end trace
>> d95032626ea304ca ]---
>>
>> Any help would be much appreciated. It seems very strange that I'm the
>> first one who runs into this.
>> I've found two bugreports which report the same, the first one at
>>
>> https://partner-bugzilla.redhat.com/show_bug.cgi?format=multiple&id=613691,
>> but that's a duplicate of
>> https://partner-bugzilla.redhat.com/show_bug.cgi?id=606131 which I'm
>> not authorized to see...
>
> These don't appear to be related. ÂAre you running ksm, btw?

No.

Kind regards,

Ruben
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