[Crash-utility] Re: seek error when loading /proc/kcore with type: "page_offset_base"

I'm trying to get crash to work on Arch Linux but I keep running into this error: crash: seek error: kernel virtual address: ffffffff82b195c0 type: "page_offset_base"

I've the upstream 6.11RC and the latest CachyOS kernel (6.10.2). I boot into the target kernel and then run crash with the respective vmlinux file. I'm simply trying to load /proc/kcore with this command: crash /usr/src/debug/linux-cachyos/vmlinux /proc/kcore -d10 Here is the full output: crash 8.0.5 Copyright (C) 2002-2024 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011, 2020-2024 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. Copyright (C) 2015, 2021 VMware, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. get_live_memory_source: /proc/kcore proc_kcore_data: flags: 500 (KCORE_LOCAL|KCORE_ELF64) segments: 28 elf_header: 64e6aab34860 header_size: 11828 notes64: 64e6aab348a0 load64: 64e6aab348d8 notes32: 0 load32: 0 vmcoreinfo: 0 size_vmcoreinfo: 0 Elf64_Phdr: p_type: 4 (PT_NOTE) p_flags: 0 p_offset: 698 p_vaddr: 0 p_paddr: 0 p_filesz: 10140 p_memsz: 0 p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 7fffbc403000 p_vaddr: ffffffffbc400000 p_paddr: 915000000 p_filesz: 50528256 p_memsz: 50528256 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 277fc0003000 p_vaddr: ffffa77fc0000000 p_paddr: ffffffffffffffff p_filesz: 35184372088831 p_memsz: 35184372088831 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 7fffc0003000 p_vaddr: ffffffffc0000000 p_paddr: ffffffffffffffff p_filesz: 1056964608 p_memsz: 1056964608 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec00004000 p_vaddr: ffff8fec00001000 p_paddr: 1000 p_filesz: 651264 p_memsz: 651264 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 727480003000 p_vaddr: fffff27480000000 p_paddr: ffffffffffffffff p_filesz: 12288 p_memsz: 12288 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec00103000 p_vaddr: ffff8fec00100000 p_paddr: 100000 p_filesz: 162529280 p_memsz: 162529280 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 727480007000 p_vaddr: fffff27480004000 p_paddr: ffffffffffffffff p_filesz: 2539520 p_memsz: 2539520 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec09de4000 p_vaddr: ffff8fec09de1000 p_paddr: 9de1000 p_filesz: 1175552 p_memsz: 1175552 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 72748027a000 p_vaddr: fffff27480277000 p_paddr: ffffffffffffffff p_filesz: 20480 p_memsz: 20480 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec09f3f000 p_vaddr: ffff8fec09f3c000 p_paddr: 9f3c000 p_filesz: 169684992 p_memsz: 169684992 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 72748027f000 p_vaddr: fffff2748027c000 p_paddr: ffffffffffffffff p_filesz: 2658304 p_memsz: 2658304 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec18313000 p_vaddr: ffff8fec18310000 p_paddr: 18310000 p_filesz: 14557184 p_memsz: 14557184 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 72748060f000 p_vaddr: fffff2748060c000 p_paddr: ffffffffffffffff p_filesz: 229376 p_memsz: 229376 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec190f6000 p_vaddr: ffff8fec190f3000 p_paddr: 190f3000 p_filesz: 20480 p_memsz: 20480 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec190fc000 p_vaddr: ffff8fec190f9000 p_paddr: 190f9000 p_filesz: 29282304 p_memsz: 29282304 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec1acea000 p_vaddr: ffff8fec1ace7000 p_paddr: 1ace7000 p_filesz: 12288 p_memsz: 12288 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 7274806b6000 p_vaddr: fffff274806b3000 p_paddr: ffffffffffffffff p_filesz: 4096 p_memsz: 4096 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec1acee000 p_vaddr: ffff8fec1aceb000 p_paddr: 1aceb000 p_filesz: 143360 p_memsz: 143360 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec20e84000 p_vaddr: ffff8fec20e81000 p_paddr: 20e81000 p_filesz: 694374400 p_memsz: 694374400 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 72748083d000 p_vaddr: fffff2748083a000 p_paddr: ffffffffffffffff p_filesz: 10850304 p_memsz: 10850304 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec4a6fa000 p_vaddr: ffff8fec4a6f7000 p_paddr: 4a6f7000 p_filesz: 76910592 p_memsz: 76910592 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 72748129e000 p_vaddr: fffff2748129b000 p_paddr: ffffffffffffffff p_filesz: 1208320 p_memsz: 1208320 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec4f054000 p_vaddr: ffff8fec4f051000 p_paddr: 4f051000 p_filesz: 71499776 p_memsz: 71499776 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec58201000 p_vaddr: ffff8fec581fe000 p_paddr: 581fe000 p_filesz: 31371264 p_memsz: 31371264 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 72748160a000 p_vaddr: fffff27481607000 p_paddr: ffffffffffffffff p_filesz: 495616 p_memsz: 495616 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fec59ff0000 p_vaddr: ffff8fec59fed000 p_paddr: 59fed000 p_filesz: 8192 p_memsz: 8192 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: fed00003000 p_vaddr: ffff8fed00000000 p_paddr: 100000000 p_filesz: 66004713472 p_memsz: 66004713472 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 727484003000 p_vaddr: fffff27484000000 p_paddr: ffffffffffffffff p_filesz: 1031323648 p_memsz: 1031323648 p_align: 4096 Elf64_Nhdr: n_namesz: 5 ("CORE") n_descsz: 336 n_type: 1 (NT_PRSTATUS) Elf64_Nhdr: n_namesz: 5 ("CORE") n_descsz: 136 n_type: 3 (NT_PRPSINFO) Elf64_Nhdr: n_namesz: 5 ("CORE") n_descsz: 6360 n_type: 4 (NT_TASKSTRUCT) Elf64_Nhdr: n_namesz: 11 ("VMCOREINFO") n_descsz: 3224 n_type: 0 (unknown) OSRELEASE=6.10.2-2-cachyos BUILD-ID=464ddea46107c047dd447fc06ce515bc716030fc PAGESIZE=4096 SYMBOL(init_uts_ns)=ffffffffbe7c70c0 OFFSET(uts_namespace.name)=0 SYMBOL(node_online_map)=ffffffffbe81bb48 SYMBOL(swapper_pg_dir)=ffffffffbe620000 SYMBOL(_stext)=ffffffffbc400000 NUMBER(VMALLOC_START)=0xffffa77fc0000000 SYMBOL(vmemmap)=fffff27480000000 SYMBOL(mem_section)=ffff8ffc5e2f7000 LENGTH(mem_section)=2048 SIZE(mem_section)=16 OFFSET(mem_section.section_mem_map)=0 NUMBER(SECTION_SIZE_BITS)=27 NUMBER(MAX_PHYSMEM_BITS)=46 SIZE(page)=64 SIZE(pglist_data)=16704 SIZE(zone)=1728 SIZE(free_area)=104 SIZE(list_head)=16 SIZE(nodemask_t)=8 OFFSET(page.flags)=0 OFFSET(page._refcount)=52 OFFSET(page.mapping)=24 OFFSET(page.lru)=8 OFFSET(page._mapcount)=48 OFFSET(page.private)=40 OFFSET(page.compound_head)=8 OFFSET(pglist_data.node_zones)=0 OFFSET(pglist_data.nr_zones)=13792 OFFSET(pglist_data.node_start_pfn)=13800 OFFSET(pglist_data.node_spanned_pages)=13816 OFFSET(pglist_data.node_id)=13824 OFFSET(zone.free_area)=256 OFFSET(zone.vm_stat)=1536 OFFSET(zone.spanned_pages)=152 OFFSET(free_area.free_list)=0 OFFSET(list_head.next)=0 OFFSET(list_head.prev)=8 LENGTH(zone.free_area)=11 SYMBOL(prb)=ffffffffbe65b940 SYMBOL(printk_rb_static)=ffffffffbe65b960 SYMBOL(clear_seq)=ffffffffbf1351a0 SIZE(printk_ringbuffer)=88 OFFSET(printk_ringbuffer.desc_ring)=0 OFFSET(printk_ringbuffer.text_data_ring)=48 OFFSET(printk_ringbuffer.fail)=80 SIZE(prb_desc_ring)=48 OFFSET(prb_desc_ring.count_bits)=0 OFFSET(prb_desc_ring.descs)=8 OFFSET(prb_desc_ring.infos)=16 OFFSET(prb_desc_ring.head_id)=24 OFFSET(prb_desc_ring.tail_id)=32 SIZE(prb_desc)=24 OFFSET(prb_desc.state_var)=0 OFFSET(prb_desc.text_blk_lpos)=8 SIZE(prb_data_blk_lpos)=16 OFFSET(prb_data_blk_lpos.begin)=0 OFFSET(prb_data_blk_lpos.next)=8 SIZE(printk_info)=88 OFFSET(printk_info.seq)=0 OFFSET(printk_info.ts_nsec)=8 OFFSET(printk_info.text_len)=16 OFFSET(printk_info.caller_id)=20 OFFSET(printk_info.dev_info)=24 SIZE(dev_printk_info)=64 OFFSET(dev_printk_info.subsystem)=0 LENGTH(printk_info_subsystem)=16 OFFSET(dev_printk_info.device)=16 LENGTH(printk_info_device)=48 SIZE(prb_data_ring)=32 OFFSET(prb_data_ring.size_bits)=0 OFFSET(prb_data_ring.data)=8 OFFSET(prb_data_ring.head_lpos)=16 OFFSET(prb_data_ring.tail_lpos)=24 SIZE(atomic_long_t)=8 OFFSET(atomic_long_t.counter)=0 SIZE(latched_seq)=24 OFFSET(latched_seq.val)=8 LENGTH(free_area.free_list)=6 NUMBER(NR_FREE_PAGES)=0 NUMBER(PG_lru)=5 NUMBER(PG_private)=14 NUMBER(PG_swapcache)=11 NUMBER(PG_swapbacked)=18 NUMBER(PAGE_SLAB_MAPCOUNT_VALUE)=-4097 NUMBER(PG_hwpoison)=22 NUMBER(PG_head_mask)=64 NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE)=-129 NUMBER(PAGE_HUGETLB_MAPCOUNT_VALUE)=-2049 NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE)=-257 SYMBOL(kallsyms_names)=ffffffffbda452f8 SYMBOL(kallsyms_num_syms)=ffffffffbda452f0 SYMBOL(kallsyms_token_table)=ffffffffbdc94af8 SYMBOL(kallsyms_token_index)=ffffffffbdc94e98 SYMBOL(kallsyms_offsets)=ffffffffbdc95098 SYMBOL(kallsyms_relative_base)=ffffffffbdd549d8 NUMBER(phys_base)=37996199936 SYMBOL(init_top_pgt)=ffffffffbe620000 NUMBER(pgtable_l5_enabled)=0 SYMBOL(node_data)=ffffffffbe81a620 LENGTH(node_data)=32 KERNELOFFSET=3b400000 NUMBER(KERNEL_IMAGE_SIZE)=1073741824 NUMBER(sme_mask)=0 /proc/version: Linux version 6.10.2-2-cachyos (linux-cachyos@cachyos) (gcc (GCC) 14.1.1 20240720, GNU ld (GNU Binutils) 2.42.0) #1 SMP PREEMPT_DYNAMIC Sat, 27 Jul 2024 19:37:59 +0000 /usr/src/debug/linux-cachyos/vmlinux: Linux version 6.10.2-2-cachyos (linux-cachyos@cachyos) (gcc (GCC) 14.1.1 20240720, GNU ld (GNU Binutils) 2.42.0) #1 SMP PREEMPT_DYNAMIC Sat, 27 Jul 2024 19:37:59 +0000 readmem: read_proc_kcore() -> /proc/kcore crash: pv_ops exists: ARCH_PVOPS VMCOREINFO: NUMBER(phys_base): 37996199936 -> 8d8c00000 gdb /usr/src/debug/linux-cachyos/vmlinux GNU gdb (GDB) 10.2 Copyright (C) 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-pc-linux-gnu". Type "show configuration" for configuration details. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>;. For help, type "help". Type "apropos word" to search for commands related to "word"... GETBUF(344 -> 0) GETBUF(1500 -> 1) FREEBUF(1) FREEBUF(0) <readmem: ffffffff82b195c0, KVADDR, "page_offset_base", 8, (FOE|Q), 64e6a75445e8> <read_proc_kcore: addr: ffffffff82b195c0 paddr: 8db7195c0 cnt: 8> crash: seek error: kernel virtual address: ffffffff82b195c0 type: "page_offset_base" [root@archlinux jose]# -- Crash-utility mailing list -- devel(a)lists.crash-utility.osci.io To unsubscribe send an email to devel-leave(a)lists.crash-utility.osci.io https://${domain_name}/admin/lists/devel.lists.crash-utility.osci.io/ Contribution Guidelines: https://github.com/crash-utility/crash/wiki