Re: Arm64 crash while reading memory sysfs

From: Qian Cai
Date: Thu May 27 2021 - 10:33:25 EST



On 5/27/2021 4:56 AM, Mike Rapoport wrote:
> Let's drop memblock=debug for now and add this instead:

[ 0.000000][ T0] Booting Linux on physical CPU 0x0000000000 [0x503f0002]
[ 0.000000][ T0] Linux version 5.13.0-rc3-next-20210526+ (root@admin5) (gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #31 SMP Thu May 27 12:32:40 UTC 2021
[ 0.000000][ T0] efi: EFI v2.70 by American Megatrends
[ 0.000000][ T0] efi: ACPI 2.0=0x9ff5b40000 SMBIOS 3.0=0x9ff686fd98 ESRT=0x9ff1d18298 MEMRESERVE=0x9fe6dbed98
[ 0.000000][ T0] esrt: Reserving ESRT space from 0x0000009ff1d18298 to 0x0000009ff1d182f8.
[ 0.000000][ T0] ACPI: Early table checksum verification disabled
[ 0.000000][ T0] ACPI: RSDP 0x0000009FF5B40000 000024 (v02 ALASKA)
[ 0.000000][ T0] ACPI: XSDT 0x0000009FF5B40028 000094 (v01 ALASKA A M I 01072009 AMI 00010013)
[ 0.000000][ T0] ACPI: FACP 0x0000009FF5B400C0 000114 (v06 Ampere eMAG 00000003 INTL 20190509)
[ 0.000000][ T0] ACPI: DSDT 0x0000009FF5B401D8 00765A (v05 ALASKA A M I 00000001 INTL 20190509)
[ 0.000000][ T0] ACPI: FIDT 0x0000009FF5B47838 00009C (v01 ALASKA A M I 01072009 AMI 00010013)
[ 0.000000][ T0] ACPI: DBG2 0x0000009FF5B478D8 000061 (v00 Ampere eMAG 00000000 INTL 20190509)
[ 0.000000][ T0] ACPI: GTDT 0x0000009FF5B47940 000108 (v02 Ampere eMAG 00000001 INTL 20190509)
[ 0.000000][ T0] ACPI: IORT 0x0000009FF5B47A48 000BCC (v00 Ampere eMAG 00000000 INTL 20190509)
[ 0.000000][ T0] ACPI: MCFG 0x0000009FF5B48618 0000AC (v01 Ampere eMAG 00000001 INTL 20190509)
[ 0.000000][ T0] ACPI: SSDT 0x0000009FF5B486C8 00002D (v02 Ampere eMAG 00000001 INTL 20190509)
[ 0.000000][ T0] ACPI: SPMI 0x0000009FF5B486F8 000041 (v05 ALASKA A M I 00000000 AMI. 00000000)
[ 0.000000][ T0] ACPI: APIC 0x0000009FF5B48740 000A68 (v04 Ampere eMAG 00000004 01000013)
[ 0.000000][ T0] ACPI: PCCT 0x0000009FF5B491A8 0005D0 (v01 Ampere eMAG 00000003 01000013)
[ 0.000000][ T0] ACPI: BERT 0x0000009FF5B49778 000030 (v01 Ampere eMAG 00000003 INTL 20190509)
[ 0.000000][ T0] ACPI: HEST 0x0000009FF5B497A8 000328 (v01 Ampere eMAG 00000003 INTL 20190509)
[ 0.000000][ T0] ACPI: SPCR 0x0000009FF5B49AD0 000050 (v02 A M I APTIO V 01072009 AMI. 0005000D)
[ 0.000000][ T0] ACPI: PPTT 0x0000009FF5B49B20 000CB8 (v01 Ampere eMAG 00000003 01000013)
[ 0.000000][ T0] ACPI: SPCR: console: pl011,mmio32,0x12600000,115200
[ 0.000000][ T0] earlycon: pl11 at MMIO32 0x0000000012600000 (options '115200')
[ 0.000000][ T0] printk: bootconsole [pl11] enabled
[ 0.000000][ T0] NUMA: Failed to initialise from firmware
[ 0.000000][ T0] NUMA: Faking a node at [mem 0x0000000090000000-0x0000009fffffffff]
[ 0.000000][ T0] NUMA: NODE_DATA [mem 0x9ffefbabc0-0x9ffefbffff]
[ 0.000000][ T0] Zone ranges:
[ 0.000000][ T0] Normal [mem 0x0000000090000000-0x0000009fffffffff]
[ 0.000000][ T0] Movable zone start for each node
[ 0.000000][ T0] Early memory node ranges
[ 0.000000][ T0] node 0: [mem 0x0000000090000000-0x0000000091ffffff]
[ 0.000000][ T0] node 0: [mem 0x0000000092000000-0x00000000928fffff]
[ 0.000000][ T0] node 0: [mem 0x0000000092900000-0x00000000fffbffff]
[ 0.000000][ T0] node 0: [mem 0x00000000fffc0000-0x00000000ffffffff]
[ 0.000000][ T0] node 0: [mem 0x0000000880000000-0x0000000fffffffff]
[ 0.000000][ T0] node 0: [mem 0x0000008800000000-0x0000009ff5aeffff]
[ 0.000000][ T0] node 0: [mem 0x0000009ff5af0000-0x0000009ff5b2ffff]
[ 0.000000][ T0] node 0: [mem 0x0000009ff5b30000-0x0000009ff5baffff]
[ 0.000000][ T0] node 0: [mem 0x0000009ff5bb0000-0x0000009ff7deffff]
[ 0.000000][ T0] node 0: [mem 0x0000009ff7df0000-0x0000009ff7e5ffff]
[ 0.000000][ T0] node 0: [mem 0x0000009ff7e60000-0x0000009ff7ffffff]
[ 0.000000][ T0] node 0: [mem 0x0000009ff8000000-0x0000009fffffffff]
[ 0.000000][ T0] Initmem setup node 0 [mem 0x0000000090000000-0x0000009fffffffff]
[ 0.000000][ T0] kasan: KernelAddressSanitizer initialized
[ 0.000000][ T0] psci: probing for conduit method from ACPI.
[ 0.000000][ T0] psci: PSCIv1.0 detected in firmware.
[ 0.000000][ T0] psci: Using standard PSCI v0.2 function IDs
[ 0.000000][ T0] psci: MIGRATE_INFO_TYPE not supported.
[ 0.000000][ T0] psci: SMC Calling Convention v65535.65535
[ 0.000000][ T0] ACPI: SRAT not present
[ 0.000000][ T0] percpu: Embedded 10 pages/cpu s584592 r8192 d62576 u655360
[ 0.000000][ T0] Detected PIPT I-cache on CPU0
[ 0.000000][ T0] CPU features: detected: GIC system register CPU interface
[ 0.000000][ T0] CPU features: detected: Spectre-v2
[ 0.000000][ T0] CPU features: detected: Spectre-v4
[ 0.000000][ T0] CPU features: detected: Kernel page table isolation (KPTI)
[ 0.000000][ T0] Built 1 zonelists, mobility grouping on. Total pages: 2091012
[ 0.000000][ T0] Policy zone: Normal
[ 0.000000][ T0] Kernel command line: BOOT_IMAGE=/vmlinuz-5.13.0-rc3-next-20210526+ root=/dev/mapper/ubuntu--vg-ubuntu--lv ro cma=1024M iommu.passthrough=1 earlycon mminit_loglevel=4
[ 0.000000][ T0] Unknown command line parameters: BOOT_IMAGE=/vmlinuz-5.13.0-rc3-next-20210526+ cma=1024M mminit_loglevel=4
[ 0.000000][ T0] Dentry cache hash table entries: 8388608 (order: 10, 67108864 bytes, linear)
[ 0.000000][ T0] Inode-cache hash table entries: 4194304 (order: 9, 33554432 bytes, linear)
[ 0.000000][ T0] mem auto-init: stack:off, heap alloc:on, heap free:off
[ 0.000000][ T0] MEMBLOCK configuration:
[ 0.000000][ T0] memory size = 0x0000001ff0000000 reserved size = 0x0000000421e33ae8
[ 0.000000][ T0] memory.cnt = 0xc
[ 0.000000][ T0] memory[0x0] [0x0000000090000000-0x0000000091ffffff], 0x0000000002000000 bytes on node 0 flags: 0x0
[ 0.000000][ T0] memory[0x1] [0x0000000092000000-0x00000000928fffff], 0x0000000000900000 bytes on node 0 flags: 0x4
[ 0.000000][ T0] memory[0x2] [0x0000000092900000-0x00000000fffbffff], 0x000000006d6c0000 bytes on node 0 flags: 0x0
[ 0.000000][ T0] memory[0x3] [0x00000000fffc0000-0x00000000ffffffff], 0x0000000000040000 bytes on node 0 flags: 0x4
[ 0.000000][ T0] memory[0x4] [0x0000000880000000-0x0000000fffffffff], 0x0000000780000000 bytes on node 0 flags: 0x0
[ 0.000000][ T0] memory[0x5] [0x0000008800000000-0x0000009ff5aeffff], 0x00000017f5af0000 bytes on node 0 flags: 0x0
[ 0.000000][ T0] memory[0x6] [0x0000009ff5af0000-0x0000009ff5b2ffff], 0x0000000000040000 bytes on node 0 flags: 0x4
[ 0.000000][ T0] memory[0x7] [0x0000009ff5b30000-0x0000009ff5baffff], 0x0000000000080000 bytes on node 0 flags: 0x0
[ 0.000000][ T0] memory[0x8] [0x0000009ff5bb0000-0x0000009ff7deffff], 0x0000000002240000 bytes on node 0 flags: 0x4
[ 0.000000][ T0] memory[0x9] [0x0000009ff7df0000-0x0000009ff7e5ffff], 0x0000000000070000 bytes on node 0 flags: 0x0
[ 0.000000][ T0] memory[0xa] [0x0000009ff7e60000-0x0000009ff7ffffff], 0x00000000001a0000 bytes on node 0 flags: 0x4
[ 0.000000][ T0] memory[0xb] [0x0000009ff8000000-0x0000009fffffffff], 0x0000000008000000 bytes on node 0 flags: 0x0
[ 0.000000][ T0] reserved.cnt = 0x16
[ 0.000000][ T0] reserved[0x0] [0x000000088b7c0000-0x000000088fffffff], 0x0000000004840000 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x1] [0x0000009be0000000-0x0000009be07fffff], 0x0000000000800000 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x2] [0x0000009be0da0000-0x0000009be819ffff], 0x0000000007400000 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x3] [0x0000009be81c0000-0x0000009f6c800255], 0x0000000384640256 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x4] [0x0000009f6c810000-0x0000009fe6daffff], 0x000000007a5a0000 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x5] [0x0000009fe6dbed98-0x0000009fe6dbeda7], 0x0000000000000010 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x6] [0x0000009fe6dc0000-0x0000009ff1d0ffff], 0x000000000af50000 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x7] [0x0000009ff1d18298-0x0000009ff1d182f7], 0x0000000000000060 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x8] [0x0000009ff1d1c600-0x0000009ff1d1c61f], 0x0000000000000020 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x9] [0x0000009ff1d1c640-0x0000009ff1d1ce47], 0x0000000000000808 bytes flags: 0x0
[ 0.000000][ T0] reserved[0xa] [0x0000009ff1d1ce80-0x0000009ff1d1d70f], 0x0000000000000890 bytes flags: 0x0
[ 0.000000][ T0] reserved[0xb] [0x0000009ff1d1d740-0x0000009ff1d1e787], 0x0000000000001048 bytes flags: 0x0
[ 0.000000][ T0] reserved[0xc] [0x0000009ff1d1e7c0-0x0000009ff1d1f84f], 0x0000000000001090 bytes flags: 0x0
[ 0.000000][ T0] reserved[0xd] [0x0000009ff1d1f880-0x0000009ff1d1fb1f], 0x00000000000002a0 bytes flags: 0x0
[ 0.000000][ T0] reserved[0xe] [0x0000009ff1d1fb40-0x0000009ff1d1fcc7], 0x0000000000000188 bytes flags: 0x0
[ 0.000000][ T0] reserved[0xf] [0x0000009ff1d1fd00-0x0000009ff5aeffff], 0x0000000003dd0300 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x10] [0x0000009ff5b30000-0x0000009ff5baffff], 0x0000000000080000 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x11] [0x0000009ff7df0000-0x0000009ff7e5ffff], 0x0000000000070000 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x12] [0x0000009ff8000000-0x0000009ffefa0007], 0x0000000006fa0008 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x13] [0x0000009ffefa0040-0x0000009ffefa00d0], 0x0000000000000091 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x14] [0x0000009ffefa0100-0x0000009ffefa0190], 0x0000000000000091 bytes flags: 0x0
[ 0.000000][ T0] reserved[0x15] [0x0000009ffefa01c0-0x0000009fffffffff], 0x000000000105fe40 bytes flags: 0x0
[ 0.000000][ T0] Memory: 777216K/133955584K available (17984K kernel code, 118722K rwdata, 4416K rodata, 6080K init, 67276K bss, 17379072K reserved, 0K cma-reserved)

> Sorry, I've missed that the BUG is apparently triggered for pfn + i. Can
> you please try this instead:

[ 259.216661][ T1417] test_pages_in_a_zone: pfn 8000 is not valid
[ 259.226547][ T1417] page:00000000f4aa8c5c is uninitialized and poisoned
[ 259.226560][ T1417] page dumped because: VM_BUG_ON_PAGE(PagePoisoned(p))