Message-ID: <5624C2FB.6080605@gmail.com>
Date:	Mon, 19 Oct 2015 12:16:27 +0200
From:	John Doe <securef33d@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xen.org
Subject: Re: PROBLEM: kernel panic xsave_init

On 19/10/2015 09:56, Ingo Molnar wrote:
> 
> Please Cc: the Xen maintainers as this appears to be Xen specific. Also, please 
> Cc: linux-kernel@...r.kernel.org.
> 
> Thanks,
> 
> 	Ingo
> 
> * John Doe <securef33d@...il.com> wrote:
> 
>> Hello,
>> I get a kernel panic on QubesOS 3.0 during boot with kernels newer than
>> 3.12.40-2, i tried several versions until the latest 4.3.0-rc5. It does
>> boot properly with xsave=0 parameter.
>> I attached the full console log with the stack trace.
>>
>> My machine runs a new i7-6700k skylake CPU on z170 chipset.
>>
>> I hope it can help.
>>
>> John.
>>
>>
>>
> 
>> about to get started...
>> [    0.000000] PAT configuration [0-7]: WB  WT  UC- UC  WC  WP  UC  UC  
>> [    0.000000] Initializing cgroup subsys cpuset
>> [    0.000000] Initializing cgroup subsys cpu
>> [    0.000000] Initializing cgroup subsys cpuacct
>> [    0.000000] Linux version 4.1.9-6.pvops.qubes.x86_64 (user@...ease) (gcc version 4.8.3 20140911 (Red Hat 4.8.3-7) (GCC) ) #1 SMP Sat Oct 3 02:28:05 UTC 2015
>> [    0.000000] Command line: placeholder root=/dev/mapper/qubes_dom0-root ro console=tty0 console=ttyS0,115200n8 rd.lvm.lv=qubes_dom0/root rd.luks.uuid=luks-nope
>> [    0.000000] Released 0 page(s)
>> [    0.000000] e820: BIOS-provided physical RAM map:
>> [    0.000000] Xen: [mem 0x0000000000000000-0x000000000009bfff] usable
>> [    0.000000] Xen: [mem 0x000000000009c800-0x00000000000fffff] reserved
>> [    0.000000] Xen: [mem 0x0000000000100000-0x0000000059f9afff] usable
>> [    0.000000] Xen: [mem 0x0000000059f9b000-0x0000000059f9bfff] ACPI NVS
>> [    0.000000] Xen: [mem 0x0000000059f9c000-0x0000000059fe5fff] reserved
>> [    0.000000] Xen: [mem 0x0000000059fe6000-0x000000005a038fff] usable
>> [    0.000000] Xen: [mem 0x000000005a039000-0x000000005a75afff] reserved
>> [    0.000000] Xen: [mem 0x000000005a75b000-0x0000000066b92fff] usable
>> [    0.000000] Xen: [mem 0x0000000066b93000-0x00000000677aafff] reserved
>> [    0.000000] Xen: [mem 0x00000000677ab000-0x0000000067f99fff] ACPI NVS
>> [    0.000000] Xen: [mem 0x0000000067f9a000-0x0000000067ffefff] ACPI data
>> [    0.000000] Xen: [mem 0x0000000067fff000-0x0000000067ffffff] usable
>> [    0.000000] Xen: [mem 0x0000000068000000-0x00000000680fffff] reserved
>> [    0.000000] Xen: [mem 0x00000000e0000000-0x00000000efffffff] reserved
>> [    0.000000] Xen: [mem 0x00000000fe000000-0x00000000fe010fff] reserved
>> [    0.000000] Xen: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
>> [    0.000000] Xen: [mem 0x00000000fed90000-0x00000000fed91fff] reserved
>> [    0.000000] Xen: [mem 0x00000000fee00000-0x00000000feefffff] reserved
>> [    0.000000] Xen: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
>> [    0.000000] Xen: [mem 0x0000000100000000-0x0000000891ffffff] usable
>> [    0.000000] bootconsole [xenboot0] enabled
>> [    0.000000] NX (Execute Disable) protection: active
>> [    0.000000] SMBIOS 2.8 present.
>> [    0.000000] Hypervisor detected: Xen
>> [    0.000000] e820: last_pfn = 0x892000 max_arch_pfn = 0x400000000
>> [    0.000000] e820: last_pfn = 0x68000 max_arch_pfn = 0x400000000
>> [    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
>> [    0.000000] init_memory_mapping: [mem 0x7d5200000-0x7d53fffff]
>> [    0.000000] init_memory_mapping: [mem 0x7c0000000-0x7d51fffff]
>> [    0.000000] init_memory_mapping: [mem 0x7a0000000-0x7bfffffff]
>> [    0.000000] init_memory_mapping: [mem 0x00100000-0x59f9afff]
>> [    0.000000] init_memory_mapping: [mem 0x59fe6000-0x5a038fff]
>> [    0.000000] init_memory_mapping: [mem 0x5a75b000-0x66b92fff]
>> [    0.000000] init_memory_mapping: [mem 0x67fff000-0x67ffffff]
>> [    0.000000] init_memory_mapping: [mem 0x100000000-0x79fffffff]
>> [    0.000000] init_memory_mapping: [mem 0x7d5400000-0x891ffffff]
>> [    0.000000] RAMDISK: [mem 0x08000000-0x0a815fff]
>> [    0.000000] ACPI: Early table checksum verification disabled
>> [    0.000000] ACPI: RSDP 0x00000000000F05B0 000024 (v02 ALASKA)
>> [    0.000000] ACPI: XSDT 0x0000000067A1F098 0000B4 (v01 ALASKA A M I    01072009 AMI  00010013)
>> [    0.000000] ACPI: FACP 0x0000000067A41B30 00010C (v05 ALASKA A M I    01072009 AMI  00010013)
>> [    0.000000] ACPI BIOS Warning (bug): Incorrect checksum in table [FACP] - 0x15, should be 0x49 (20150410/tbprint-211)
>> [    0.000000] ACPI: DSDT 0x0000000067A1F1E8 022943 (v02 ALASKA A M I    01072009 INTL 20120913)
>> [    0.000000] ACPI: FACS 0x0000000067F99F80 000040
>> [    0.000000] ACPI: APIC 0x0000000067A41C40 0000BC (v03 ALASKA A M I    01072009 AMI  00010013)
>> [    0.000000] ACPI: FPDT 0x0000000067A41D00 000044 (v01 ALASKA A M I    01072009 AMI  00010013)
>> [    0.000000] ACPI: FIDT 0x0000000067A41D48 00009C (v01 ALASKA A M I    01072009 AMI  00010013)
>> [    0.000000] ACPI: MCFG 0x0000000067A41DE8 00003C (v01 ALASKA A M I    01072009 MSFT 00000097)
>> [    0.000000] ACPI: HPET 0x0000000067A41E28 000038 (v01 ALASKA A M I    01072009 AMI. 0005000B)
>> [    0.000000] ACPI: SSDT 0x0000000067A41E60 00036D (v01 SataRe SataTabl 00001000 INTL 20120913)
>> [    0.000000] ACPI: LPIT 0x0000000067A421D0 000094 (v01 INTEL  SKL      00000000 MSFT 0000005F)
>> [    0.000000] ACPI: SSDT 0x0000000067A42268 00002B (v02 INTEL  UsbCTabl 00001000 INTL 20120913)
>> [    0.000000] ACPI: DBGP 0x0000000067A42298 000034 (v01 INTEL           00000000 MSFT 0000005F)
>> [    0.000000] ACPI: DBG2 0x0000000067A422D0 000054 (v00 INTEL           00000000 MSFT 0000005F)
>> [    0.000000] ACPI: SSDT 0x0000000067A42328 000618 (v02 INTEL  xh_rvp08 00000000 INTL 20120913)
>> [    0.000000] ACPI: AAFT 0x0000000067A42940 0004CE (v01 ALASKA OEMAAFT  01072009 MSFT 00000097)
>> [    0.000000] ACPI: SSDT 0x0000000067A42E10 005212 (v02 SaSsdt SaSsdt   00003000 INTL 20120913)
>> [    0.000000] ACPI: UEFI 0x0000000067A48028 000042 (v01                 00000000      00000000)
>> [    0.000000] ACPI: SSDT 0x0000000067A48070 000E58 (v02 CpuRef CpuSsdt  00003000 INTL 20120913)
>> [    0.000000] ACPI: XMAR 0x0000000067A48EC8 0000A8 (v01 INTEL  SKL      00000001 INTL 00000001)
>> [    0.000000] ACPI: ASF! 0x0000000067A48F70 0000A5 (v32 INTEL   HCG     00000001 TFSM 000F4240)
>> [    0.000000] Setting APIC routing to Xen PV.
>> [    0.000000] NUMA turned off
>> [    0.000000] Faking a node at [mem 0x0000000000000000-0x0000000891ffffff]
>> [    0.000000] NODE_DATA(0) allocated [mem 0x7d54c9000-0x7d54dcfff]
>> [    0.000000] Zone ranges:
>> [    0.000000]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
>> [    0.000000]   DMA32    [mem 0x0000000001000000-0x00000000ffffffff]
>> [    0.000000]   Normal   [mem 0x0000000100000000-0x0000000891ffffff]
>> [    0.000000] Movable zone start for each node
>> [    0.000000] Early memory node ranges
>> [    0.000000]   node   0: [mem 0x0000000000001000-0x000000000009bfff]
>> [    0.000000]   node   0: [mem 0x0000000000100000-0x0000000059f9afff]
>> [    0.000000]   node   0: [mem 0x0000000059fe6000-0x000000005a038fff]
>> [    0.000000]   node   0: [mem 0x000000005a75b000-0x0000000066b92fff]
>> [    0.000000]   node   0: [mem 0x0000000067fff000-0x0000000067ffffff]
>> [    0.000000]   node   0: [mem 0x0000000100000000-0x0000000891ffffff]
>> [    0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x0000000891ffffff]
>> [    0.000000] p2m virtual area at ffffc90000000000, size is 4600000
>> [    0.000000] Remapped 629821 page(s)
>> [    0.000000] ACPI: PM-Timer IO Port: 0x1808
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x02] high edge lint[0x1])
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x03] high edge lint[0x1])
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x04] high edge lint[0x1])
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x05] high edge lint[0x1])
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x06] high edge lint[0x1])
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x07] high edge lint[0x1])
>> [    0.000000] ACPI: LAPIC_NMI (acpi_id[0x08] high edge lint[0x1])
>> [    0.000000] IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-119
>> [    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
>> [    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
>> [    0.000000] Using ACPI (MADT) for SMP configuration information
>> [    0.000000] ACPI: HPET id: 0x8086a701 base: 0xfed00000
>> [    0.000000] smpboot: Allowing 8 CPUs, 0 hotplug CPUs
>> [    0.000000] e820: [mem 0x68100000-0xdfffffff] available for PCI devices
>> [    0.000000] Booting paravirtualized kernel on Xen
>> [    0.000000] Xen version: 4.4.2 (preserve-AD)
>> [    0.000000] clocksource refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
>> [    0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:8 nr_node_ids:1
>> [    0.000000] PERCPU: Embedded 34 pages/cpu @ffff88086ee00000 s101080 r8192 d29992 u262144
>> [    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 8226204
>> [    0.000000] Policy zone: Normal
>> [    0.000000] Kernel command line: placeholder root=/dev/mapper/qubes_dom0-root ro console=tty0 console=ttyS0,115200n8 rd.lvm.lv=qubes_dom0/root rd.luks.uuid=luks-nope
>> [    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
>> (XEN) traps.c:2524:d0 Domain attempted WRMSR 00000000c0000081 from 0xe023e00800000000 to 0x0023001000000000.
>> (XEN) traps.c:2524:d0 Domain attempted WRMSR 00000000c0000082 from 0xffff82d0802b3000 to 0xffffffff81772ed0.
>> (XEN) traps.c:2524:d0 Domain attempted WRMSR 00000000c0000083 from 0xffff82d0802b3080 to 0xffffffff81775870.
>> (XEN) traps.c:2524:d0 Domain attempted WRMSR 0000000000000174 from 0x000000000000e008 to 0x0000000000000010.
>> (XEN) traps.c:2524:d0 Domain attempted WRMSR 0000000000000175 from 0xffff82d0802b7fc0 to 0x0000000000000000.
>> (XEN) traps.c:2524:d0 Domain attempted WRMSR 0000000000000176 from 0xffff82d08021aff0 to 0xffffffff81775640.
>> (XEN) traps.c:2524:d0 Domain attempted WRMSR 00000000c0000084 from 0x0000000000034700 to 0x0000000000047700.
>> [    0.000000] general protection fault: 0000 [#1] SMP 
>> [    0.000000] Modules linked in:
>> [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.1.9-6.pvops.qubes.x86_64 #1
>> [    0.000000] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z170 Extreme4, BIOS P1.80 09/18/2015
>> [    0.000000] task: ffffffff81c154c0 ti: ffffffff81c00000 task.ti: ffffffff81c00000
>> [    0.000000] RIP: e030:[<ffffffff81d58fad>]  [<ffffffff81d58fad>] xstate_enable_boot_cpu+0xde/0x288
>> [    0.000000] RSP: e02b:ffffffff81c03de8  EFLAGS: 00010046
>> [    0.000000] RAX: 000000000000001f RBX: 0000000000000008 RCX: 0000000000000000
>> [    0.000000] RDX: 0000000000000000 RSI: 000000000000001f RDI: 0000000000042660
>> [    0.000000] RBP: ffffffff81c03e48 R08: 0000000000000000 R09: ffffffff81c03df8
>> [    0.000000] R10: ffffffff81c03dfc R11: 00000000ffffffff R12: 0000000000000004
>> [    0.000000] R13: 0000000000000000 R14: ffffffff81c154c0 R15: ffff88086ee0b860
>> [    0.000000] FS:  0000000000000000(0000) GS:ffff88086ee00000(0000) knlGS:0000000000000000
>> [    0.000000] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [    0.000000] CR2: ffffc9000448f000 CR3: 0000000001c0e000 CR4: 0000000000042660
>> [    0.000000] Stack:
>> [    0.000000]  0000000000000000 000002400000001f 0000000000000440 0000000000000008
>> [    0.000000]  ffff88086ee0a250 2008ee3531103c85 0000000080050033 0000000000000008
>> [    0.000000]  0000000000000004 0000000000000000 ffffffff81c154c0 ffff88086ee0b860
>> [    0.000000] Call Trace:
>> [    0.000000]  [<ffffffff810237b0>] xsave_init+0x30/0x40
>> [    0.000000]  [<ffffffff8102201e>] fpu_init+0x9e/0xb0
>> [    0.000000]  [<ffffffff8102a1f4>] cpu_init+0x2f4/0x3e0
>> [    0.000000]  [<ffffffff81d54f05>] trap_init+0x2a2/0x312
>> [    0.000000]  [<ffffffff81d4def8>] start_kernel+0x25a/0x4bf
>> [    0.000000]  [<ffffffff81d4da8e>] ? set_init_arg+0x55/0x55
>> [    0.000000]  [<ffffffff81d4d5ee>] x86_64_start_reservations+0x2a/0x2c
>> [    0.000000]  [<ffffffff81d50a38>] xen_start_kernel+0x518/0x524
>> [    0.000000] Code: 48 89 35 df 8a 17 00 48 39 f8 74 0f 65 48 89 3d 3a e0 2b 7e ff 14 25 f8 c4 c2 81 48 8b 05 c4 8a 17 00 31 c9 48 89 c2 48 c1 ea 20 <0f> 01 d1 48 8b 05 e5 aa fc ff a8 08 7 
>> [    0.000000] RIP  [<ffffffff81d58fad>] xstate_enable_boot_cpu+0xde/0x288
>> [    0.000000]  RSP <ffffffff81c03de8>
>> [    0.000000] ---[ end trace 1f0c5608e200b15b ]---
>> [    0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
>> (XEN) Domain 0 crashed: rebooting machine in 5 seconds.
> 
Here it is.
I'm new to bug reporting, if you need anything just ask.

Thank you,
John.
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