On 2025-02-19 09:26, Ryan Roberts wrote:
On 19/02/2025 14:16, Luiz Capitulino wrote:
On 2025-02-19 03:41, Ryan Roberts wrote:
On 19/02/2025 02:27, Luiz Capitulino wrote:
Hi,
I'm getting the crash below with Linus tree commit
2408a807bfc3f738850ef5ad5e3fd59d66168996 on a Ampere Mt. Jade with two sockets
(backtrace below).
Thanks for the bug report, I'll take a look this morning, but I'm off work
tomorrow and Friday so if I can't figure it out before end of day I won't be
able to look again until Monday, unless someone can pick it up in the meantime.
No rush at all. Please, enjoy your time off :)
Afraid I've run out of time on this for today, so adding some details below.
I'll come back to it next week unless someone else steps in.
Anyway, is there a specific config you're compiling for? And what about kernel
command line args?
Config is attached. The kernel command-line is:
"""
ro crashkernel=1G-4G:406M,4G-64G:470M,64G-:726M rd.lvm.lv=cs_ampere-mtjade-
altra-03/root rd.lvm.lv=cs_ampere-mtjade-altra-03/swap
earlycon=pl011,mmio,0x100002600000
"""
Is it 100% reproducible for you?
That is a good question. Right now it is (just tried again with latest Linus
tree 6537cfb395f352782918d8ee7b7f10ba2cc3cbf2). But I do have the recollection
that I was able to boot a bad kernel a few times.
Btw, I'll try to bisect again and will also try to update the system's firmware
just in case.
How much RAM does your system have? (I have 2
socket Mt. Jade with 512G; I'll try to repro on that).
Mine is 512G, maybe we're lucky and it's the same system.
It happens very early during boot. Passing 'nokaslr' in the command-line works
around the issue (ie. I can boot and use the system normally). Doesn't seem to
happen with 6.13. I tried bisecting it but got nowhere...
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] kernel BUG at arch/arm64/mm/mmu.c:185!
This is:
/*
* After the PTE entry has been populated once, we
* only allow updates to the permission attributes.
*/
BUG_ON(!pgattr_change_is_safe(pte_val(old_pte), pte_val(__ptep_get(ptep))));
So we have a valid -> valid PTE transition where either the PFNs are changing,
we are trying to change permissions on a contiguous entry, we are trying to
transition from non-global to global, or we are trying to change other
explicitly disallowed bits.
[ 0.000000] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.14.0-rc3+ #8
[ 0.000000] pstate: 400000c9 (nZcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 0.000000] pc : alloc_init_cont_pte+0x20c/0x3d0
[ 0.000000] lr : alloc_init_cont_pte+0x204/0x3d0
[ 0.000000] sp : ffffb45836ec78b0
[ 0.000000] x29: ffffb45836ec7940 x28: ffff6fea00000000 x27: 0068000000000f07
[ 0.000000] x26: ffff6fea00200000 x25: 0000400000000000 x24: ffffffffff433000
[ 0.000000] x23: dfff800000000000 x22: 0000d01600000000 x21: 0068000000000f07
[ 0.000000] x20: ffff6fea00000000 x19: ffff6fea00010000 x18: 00000000ae5a3fb1
[ 0.000000] x17: 0000000000001114 x16: 00000000bfc60000 x15: 0000000000000200
[ 0.000000] x14: 0000000000000000 x13: 1ffff68b06dd8f1c x12: 00000000f1f1f1f1
[ 0.000000] x11: ffff768b06dd8f1c x10: ffffb45835a1ca38 x9 : 0000000000000000
[ 0.000000] x8 : 0000000041b58ab3 x7 : 0000000000000000 x6 : 0000000000000000
[ 0.000000] x5 : 006840000a861f07 x4 : 000000000000a861 x3 : 000000000000a861
[ 0.000000] x2 : 006840000a861f03 x1 : 0068400000000f07 x0 : 0000000000000000
[ 0.000000] Call trace:
[ 0.000000] alloc_init_cont_pte+0x20c/0x3d0 (P)
[ 0.000000] alloc_init_cont_pmd+0x20c/0x4d0
[ 0.000000] alloc_init_pud+0x244/0x400
[ 0.000000] create_kpti_ng_temp_pgd+0xf8/0x1c8
This is an alias for __create_pgd_mapping_locked() so I suspect we are actually
in __map_memblock().
[ 0.000000] map_mem.constprop.0+0x1d8/0x3b8
[ 0.000000] paging_init+0x98/0x330
[ 0.000000] setup_arch+0xac/0x170
[ 0.000000] start_kernel+0x74/0x3c8
[ 0.000000] __primary_switched+0x8c/0xa0
[ 0.000000] Code: f9400301 97ffff64 72001c1f 54fffe21 (d4210000)
[ 0.000000] ---[ end trace 0000000000000000 ]---
[ 0.000000] Kernel panic - not syncing: Oops - BUG: Fatal exception
[ 0.000000] ---[ end Kernel panic - not syncing: Oops - BUG: Fatal
exception ]---
So I guess either we are setting a PTE entry into a table for the first time,
where somehow the table has not been initially cleared (very unlikely) or we are
trying to update the permissions of an already mapped pte. In that latter case,
I think we should only be remapping the kernel image portion of the linear map.
I can't see any obvious recent changes in this area. I'll see if I can repro and
poke around a bit more.
OK, maybe you'll be able to reproduce with the config I'm attaching.
I can reproduce _a_ panic, but it's different from the one you shared. I'm
running defconfig on Ampere Altra with 2 sockets and 512G RAM. It appears to
repro reliably as long as kaslr is enabled.
Well, after I pasted my kernel command-line to you I wondered why I didn't
have a console= option. So, I added console=ttyAMA0,115200n8 and it changed
the crash for me (see below).
I tried reproduing on VM, but with no luck. I suspect there is something about
the physical layout of memory that provokes the bug. I tried to force the memory
layout to match Altra using kvmtool but it only supports a single physical
region currently. And merging all the regions into 1 uber region is too big and
the VMM fails. So I think we are stuck having to keep rebooting the bare metal.
Yes, I forgot to say that I've been using KVM guests for my kernel work on this
same system and I never saw this crash on those guests (they're NUMA guests).
Here's my new crash:
[ 0.000000] Booting Linux on physical CPU 0x0000120000 [0x413fd0c1]
[ 0.000000] Linux version 6.14.0-rc3-00060-g6537cfb395f3 (luizcap@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-5), GNU ld version 2.35.2-60.el9) #1 SMP PREEMPT_DYNAMIC Wed Feb 19 08:39:20 EST 2025
[ 0.000000] KASLR enabled
[ 0.000000] earlycon: pl11 at MMIO 0x0000100002600000 (options '')
[ 0.000000] printk: legacy bootconsole [pl11] enabled
[ 0.000000] efi: EFI v2.7 by American Megatrends
[ 0.000000] efi: ACPI 2.0=0xbfc30000 TPMFinalLog=0xbfc60000 SMBIOS 3.0=0xb93dff98 MEMATTR=0xb8e3a018 ESRT=0xbb242298 TPMEventLog=0xb2da7518 RNG=0xb2dafe98 MEMRESERVE=0xb5482818
[ 0.000000] random: crng init done
[ 0.000000] esrt: Reserving ESRT space from 0x00000000bb242298 to 0x00000000bb2422f8.
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x00000000BFC30000 000024 (v02 Ampere)
[ 0.000000] ACPI: XSDT 0x00000000BB300000 0000E4 (v01 Ampere Altra 00000000 AMI 01000013)
[ 0.000000] ACPI: FACP 0x00000000BB1A0000 000114 (v06 Ampere Altra 00000000 INTL 20190509)
[ 0.000000] ACPI: DSDT 0x00000000BB0B0000 02F09A (v02 Ampere Jade 00000001 INTL 20200717)
[ 0.000000] ACPI: FACS 0x00000000BFC50000 000040
[ 0.000000] ACPI: DBG2 0x00000000BB1B0000 00005C (v00 Ampere Altra 00000000 INTL 20190509)
[ 0.000000] ACPI: GTDT 0x00000000BB190000 000110 (v03 Ampere Altra 00000000 INTL 20190509)
[ 0.000000] ACPI: SSDT 0x00000000BB180000 00002D (v02 Ampere Altra 00000001 INTL 20190509)
[ 0.000000] ACPI: EINJ 0x00000000BB150000 000150 (v01 Ampere Altra 00000001 INTL 20200717)
[ 0.000000] ACPI: SDEI 0x00000000BB140000 000024 (v01 Ampere Altra 00000001 INTL 20200717)
[ 0.000000] ACPI: SPMI 0x00000000BB130000 000041 (v05 ALASKA A M I 00000000 AMI. 00000000)
[ 0.000000] ACPI: SPMI 0x00000000BB120000 000041 (v05 ALASKA A M I 00000000 AMI. 00000000)
[ 0.000000] ACPI: SPMI 0x00000000BB110000 000041 (v05 ALASKA A M I 00000000 AMI. 00000000)
[ 0.000000] ACPI: FIDT 0x00000000BA5F0000 00009C (v01 ALASKA A M I 01072009 AMI 00010013)
[ 0.000000] ACPI: SPCR 0x00000000B8E10000 000050 (v02 A M I APTIO V 01072009 AMI. 0005000F)
[ 0.000000] ACPI: TPM2 0x00000000B3050000 000064 (v04 ALASKA A M I 00000001 AMI 00000000)
[ 0.000000] ACPI: PPTT 0x00000000B2F50000 006E60 (v02 Ampere Altra 00000000 AMP. 01000013)
[ 0.000000] ACPI: SLIT 0x00000000B2F90000 000030 (v01 Ampere Altra 00000000 AMP. 01000013)
[ 0.000000] ACPI: SRAT 0x00000000B2F40000 000CF0 (v03 Ampere Altra 00000000 AMP. 01000013)
[ 0.000000] ACPI: HEST 0x00000000B2F30000 0008D8 (v01 Ampere Altra 00000001 ARM 00000099)
[ 0.000000] ACPI: BERT 0x00000000BB160000 000030 (v01 Ampere Altra 00000001 INTL 20200717)
[ 0.000000] ACPI: MCFG 0x00000000B2F20000 0000EC (v01 Ampere Altra 00000001 AMP. 01000013)
[ 0.000000] ACPI: IORT 0x00000000B2F10000 000900 (v00 Ampere Altra 00000000 AMP. 01000013)
[ 0.000000] ACPI: APIC 0x00000000B2F60000 003354 (v05 Ampere Altra 00000003 AMI 01000013)
[ 0.000000] ACPI: PCCT 0x00000000B2E80000 000ABC (v02 Ampere Altra 00000003 AMP. 01000013)
[ 0.000000] ACPI: FPDT 0x00000000B2E50000 000044 (v01 ALASKA A M I 01072009 AMI 01000013)
[ 0.000000] ACPI: WSMT 0x00000000B8090000 000028 (v01 ALASKA A M I 01072009 AMI 00010013)
[ 0.000000] ACPI: BGRT 0x00000000B8DB0000 000038 (v01 ALASKA A M I 01072009 AMI 00010013)
[ 0.000000] ACPI: SPCR: console: pl011,mmio32,0x100002600000,115200
[ 0.000000] ACPI: Use ACPI SPCR as default console: Yes
[ 0.000000] ACPI: SRAT: Node 0 PXM 0 [mem 0x88300000-0x883fffff]
[ 0.000000] ACPI: SRAT: Node 0 PXM 0 [mem 0x90000000-0xbfffffff]
[ 0.000000] ACPI: SRAT: Node 0 PXM 0 [mem 0x80000000000-0x8007fffffff]
[ 0.000000] ACPI: SRAT: Node 0 PXM 0 [mem 0x800c0000000-0x83fffffffff]
[ 0.000000] ACPI: SRAT: Node 1 PXM 1 [mem 0x400000000000-0x4000bfffffff]
[ 0.000000] ACPI: SRAT: Node 1 PXM 1 [mem 0x400100000000-0x403fffffffff]
[ 0.000000] NUMA: Node 0 [mem 0x88300000-0x883fffff] + [mem 0x90000000-0xbfffffff] -> [mem 0x88300000-0xbfffffff]
[ 0.000000] NUMA: Node 0 [mem 0x88300000-0xbfffffff] + [mem 0x80000000000-0x8007fffffff] -> [mem 0x88300000-0x8007fffffff]
[ 0.000000] NUMA: Node 0 [mem 0x88300000-0x8007fffffff] + [mem 0x800c0000000-0x83fffffffff] -> [mem 0x88300000-0x83fffffffff]
[ 0.000000] NUMA: Node 1 [mem 0x400000000000-0x4000bfffffff] + [mem 0x400100000000-0x403fffffffff] -> [mem 0x400000000000-0x403fffffffff]
[ 0.000000] NODE_DATA(0) allocated [mem 0x83ffffe92c0-0x83fffffffff]
[ 0.000000] NODE_DATA(1) allocated [mem 0x403fc00b22c0-0x403fc00c8fff]
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: CPU: 0 PID: 0 at mm/sparse.c:142 memblocks_present+0x154/0x3f0
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.14.0-rc3-00060-g6537cfb395f3 #1
[ 0.000000] pstate: 600000c9 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 0.000000] pc : memblocks_present+0x154/0x3f0
[ 0.000000] lr : memblocks_present+0x168/0x3f0
[ 0.000000] sp : ffffd58845d17b30
[ 0.000000] x29: ffffd58845d17c20 x28: 00000000c4b40000 x27: 0000000400000000
[ 0.000000] x26: dfff800000000000 x25: 00000000001fffff x24: 00000004000c0000
[ 0.000000] x23: 0000000000000001 x22: 0000000000000004 x21: ffffd58846cd81e0
[ 0.000000] x20: 0000000000001078 x19: 000000000000020f x18: 0000000000000003
[ 0.000000] x17: 0000000000000004 x16: 0000403fc00c9000 x15: 0000020000000000
[ 0.000000] x14: 0000000000036d40 x13: 0000000100000000 x12: ffff6b7e97ffb258
[ 0.000000] x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
[ 0.000000] x8 : 0000000000000000 x7 : ffffd58846ca8424 x6 : 1ffffab108d95082
[ 0.000000] x5 : 00000000000000de x4 : 1ffffab108ba2f7c x3 : 1ffffab108ba2f76
[ 0.000000] x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
[ 0.000000] Call trace:
[ 0.000000] memblocks_present+0x154/0x3f0 (P)
[ 0.000000] sparse_init+0x40/0x340
[ 0.000000] bootmem_init+0x134/0x360
[ 0.000000] setup_arch+0xc0/0x170
[ 0.000000] start_kernel+0x74/0x3c8
[ 0.000000] __primary_switched+0x8c/0xa0
[ 0.000000] ---[ end trace 0000000000000000 ]---
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000088300000-0x00000000ffffffff]
[ 0.000000] DMA32 empty
[ 0.000000] Normal [mem 0x0000000100000000-0x0000403fffffffff]
[ 0.000000] Device empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000088300000-0x00000000883fffff]
[ 0.000000] node 0: [mem 0x0000000090000000-0x0000000091ceffff]
[ 0.000000] node 0: [mem 0x0000000091cf0000-0x0000000091deffff]
[ 0.000000] node 0: [mem 0x0000000091df0000-0x0000000091ffffff]
[ 0.000000] node 0: [mem 0x0000000092000000-0x000000009277ffff]
[ 0.000000] node 0: [mem 0x0000000092780000-0x00000000b1085fff]
[ 0.000000] node 0: [mem 0x00000000b1086000-0x00000000b134ffff]
[ 0.000000] node 0: [mem 0x00000000b1350000-0x00000000b15effff]
[ 0.000000] node 0: [mem 0x00000000b15f0000-0x00000000b25fffff]
[ 0.000000] node 0: [mem 0x00000000b2600000-0x00000000b2e8ffff]
[ 0.000000] node 0: [mem 0x00000000b2e90000-0x00000000b2f0ffff]
[ 0.000000] node 0: [mem 0x00000000b2f10000-0x00000000b308ffff]
[ 0.000000] node 0: [mem 0x00000000b3090000-0x00000000b30effff]
[ 0.000000] node 0: [mem 0x00000000b30f0000-0x00000000b310ffff]
[ 0.000000] node 0: [mem 0x00000000b3110000-0x00000000b315ffff]
[ 0.000000] node 0: [mem 0x00000000b3160000-0x00000000b3d2ffff]
[ 0.000000] node 0: [mem 0x00000000b3d30000-0x00000000b3d3ffff]
[ 0.000000] node 0: [mem 0x00000000b3d40000-0x00000000b402ffff]
[ 0.000000] node 0: [mem 0x00000000b4030000-0x00000000b403ffff]
[ 0.000000] node 0: [mem 0x00000000b4040000-0x00000000b433ffff]
[ 0.000000] node 0: [mem 0x00000000b4340000-0x00000000b547ffff]
[ 0.000000] node 0: [mem 0x00000000b5480000-0x00000000b8e3ffff]
[ 0.000000] node 0: [mem 0x00000000b8e40000-0x00000000b8e4ffff]
[ 0.000000] node 0: [mem 0x00000000b8e50000-0x00000000b8feffff]
[ 0.000000] node 0: [mem 0x00000000b8ff0000-0x00000000b900ffff]
[ 0.000000] node 0: [mem 0x00000000b9010000-0x00000000b93affff]
[ 0.000000] node 0: [mem 0x00000000b93b0000-0x00000000b94fffff]
[ 0.000000] node 0: [mem 0x00000000b9500000-0x00000000b953ffff]
[ 0.000000] node 0: [mem 0x00000000b9540000-0x00000000b955ffff]
[ 0.000000] node 0: [mem 0x00000000b9560000-0x00000000b957ffff]
[ 0.000000] node 0: [mem 0x00000000b9580000-0x00000000ba5affff]
[ 0.000000] node 0: [mem 0x00000000ba5b0000-0x00000000ba64ffff]
[ 0.000000] node 0: [mem 0x00000000ba650000-0x00000000ba66ffff]
[ 0.000000] node 0: [mem 0x00000000ba670000-0x00000000ba85ffff]
[ 0.000000] node 0: [mem 0x00000000ba860000-0x00000000ba8cffff]
[ 0.000000] node 0: [mem 0x00000000ba8d0000-0x00000000ba99ffff]
[ 0.000000] node 0: [mem 0x00000000ba9a0000-0x00000000bab2ffff]
[ 0.000000] node 0: [mem 0x00000000bab30000-0x00000000bab7ffff]
[ 0.000000] node 0: [mem 0x00000000bab80000-0x00000000bac1ffff]
[ 0.000000] node 0: [mem 0x00000000bac20000-0x00000000bac6ffff]
[ 0.000000] node 0: [mem 0x00000000bac70000-0x00000000bad0ffff]
[ 0.000000] node 0: [mem 0x00000000bad10000-0x00000000bad9ffff]
[ 0.000000] node 0: [mem 0x00000000bada0000-0x00000000bae3ffff]
[ 0.000000] node 0: [mem 0x00000000bae40000-0x00000000bae4ffff]
[ 0.000000] node 0: [mem 0x00000000bae50000-0x00000000baf2ffff]
[ 0.000000] node 0: [mem 0x00000000baf30000-0x00000000baf7ffff]
[ 0.000000] node 0: [mem 0x00000000baf80000-0x00000000bb01ffff]
[ 0.000000] node 0: [mem 0x00000000bb020000-0x00000000bb0dffff]
[ 0.000000] node 0: [mem 0x00000000bb0e0000-0x00000000bb0effff]
[ 0.000000] node 0: [mem 0x00000000bb0f0000-0x00000000bb25ffff]
[ 0.000000] node 0: [mem 0x00000000bb260000-0x00000000bb28ffff]
[ 0.000000] node 0: [mem 0x00000000bb290000-0x00000000bb7affff]
[ 0.000000] node 0: [mem 0x00000000bb7b0000-0x00000000bb84ffff]
[ 0.000000] node 0: [mem 0x00000000bb850000-0x00000000bb8dffff]
[ 0.000000] node 0: [mem 0x00000000bb8e0000-0x00000000bb97ffff]
[ 0.000000] node 0: [mem 0x00000000bb980000-0x00000000bb99ffff]
[ 0.000000] node 0: [mem 0x00000000bb9a0000-0x00000000bb9bffff]
[ 0.000000] node 0: [mem 0x00000000bb9c0000-0x00000000bba0ffff]
[ 0.000000] node 0: [mem 0x00000000bba10000-0x00000000bde4ffff]
[ 0.000000] node 0: [mem 0x00000000bde50000-0x00000000bdebffff]
[ 0.000000] node 0: [mem 0x00000000bdec0000-0x00000000bf05ffff]
[ 0.000000] node 0: [mem 0x00000000bf060000-0x00000000bf0effff]
[ 0.000000] node 0: [mem 0x00000000bf0f0000-0x00000000bf1cffff]
[ 0.000000] node 0: [mem 0x00000000bf1d0000-0x00000000bf21ffff]
[ 0.000000] node 0: [mem 0x00000000bf220000-0x00000000bf2bffff]
[ 0.000000] node 0: [mem 0x00000000bf2c0000-0x00000000bf2dffff]
[ 0.000000] node 0: [mem 0x00000000bf2e0000-0x00000000bf2fffff]
[ 0.000000] node 0: [mem 0x00000000bf300000-0x00000000bfc2dfff]
[ 0.000000] node 0: [mem 0x00000000bfc2e000-0x00000000bfc2ffff]
[ 0.000000] node 0: [mem 0x00000000bfc30000-0x00000000bfc4ffff]
[ 0.000000] node 0: [mem 0x00000000bfc50000-0x00000000bfcbffff]
[ 0.000000] node 0: [mem 0x00000000bfcc0000-0x00000000bfffffff]
[ 0.000000] node 0: [mem 0x0000080000000000-0x000008007fffffff]
[ 0.000000] node 0: [mem 0x00000800c0000000-0x0000083fffffffff]
[ 0.000000] node 1: [mem 0x0000400000000000-0x00004000bfffffff]
[ 0.000000] Unable to handle kernel paging request at virtual address dfff800000000001
[ 0.000000] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
[ 0.000000] Mem abort info:
[ 0.000000] ESR = 0x0000000096000004
[ 0.000000] EC = 0x25: DABT (current EL), IL = 32 bits
[ 0.000000] SET = 0, FnV = 0
[ 0.000000] EA = 0, S1PTW = 0
[ 0.000000] FSC = 0x04: level 0 translation fault
[ 0.000000] Data abort info:
[ 0.000000] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
[ 0.000000] CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[ 0.000000] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[ 0.000000] [dfff800000000001] address between user and kernel address ranges
[ 0.000000] Internal error: Oops: 0000000096000004 [#1] SMP
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 UID: 0 PID: 0 Comm: swapper Tainted: G W 6.14.0-rc3-00060-g6537cfb395f3 #1
[ 0.000000] Tainted: [W]=WARN
[ 0.000000] pstate: 800000c9 (Nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 0.000000] pc : subsection_map_init+0xb4/0x160
[ 0.000000] lr : free_area_init+0x368/0xd08
[ 0.000000] sp : ffffd58845d17a90
[ 0.000000] x29: ffffd58845d17a90 x28: 00000000000c0000 x27: 0000000400000000
[ 0.000000] x26: 0000000000080000 x25: ffffd58843f11d60 x24: ffffd58843f11920
[ 0.000000] x23: 0000000000008000 x22: 0000000000080017 x21: dfff800000000000
[ 0.000000] x20: 0000000000000000 x19: 0000000000008000 x18: 0000000000000003
[ 0.000000] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[ 0.000000] x14: 0000000000000000 x13: 0000000000000001 x12: ffff7ab108bb333d
[ 0.000000] x11: 1ffffab108bb333c x10: ffff7ab108bb333c x9 : dfff800000000000
[ 0.000000] x8 : 0000854ef744ccc4 x7 : ffffd58845d999e3 x6 : 0000000000000001
[ 0.000000] x5 : ffffd58845d999e0 x4 : ffff7ab108bb333d x3 : 0000000000000000
[ 0.000000] x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000008
[ 0.000000] Call trace:
[ 0.000000] subsection_map_init+0xb4/0x160 (P)
[ 0.000000] free_area_init+0x368/0xd08
[ 0.000000] bootmem_init+0x208/0x360
[ 0.000000] setup_arch+0xc0/0x170
[ 0.000000] start_kernel+0x74/0x3c8
[ 0.000000] __primary_switched+0x8c/0xa0
[ 0.000000] Code: d37b1b40 8b000294 91002280 d343fc01 (38f56821)
[ 0.000000] ---[ end trace 0000000000000000 ]---
[ 0.000000] Kernel panic - not syncing: Oops: Fatal exception
[ 0.000000] ---[ end Kernel panic - not syncing: Oops: Fatal exception ]---
