[Crash-utility] Re: crash: seek error: kernel virtual address: ffffffff8292c360 type: "page_offset_base"

Hi Crash-utility folks, Recently, I am using crash to debug a live system. When I execute the crash, it cannot enter the crash cmd shell, it was broken by crash seek error. My kernel turned on the CONFIG_RANDOMIZE_BASE, and I added the kaslr=auto parameter to crash. If I disable the CONFIG_RANDOMIZE_BASE, the issue has gone. Could you please help to check if any config/parameter I was missing? Thanks. The following is my system information: crash version: 8.0.6 kernel version: 6.1.118 Host system: qemux86-64 Here is the full log with -d: root@intel-x86-64:/boot# crash -S /boot/vmlinux-6.1.118-yocto-standard /proc/kcore -d10 --kaslr=auto

crash 8.0.6 Copyright (C) 2002-2025 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: 10 elf_header: 56471f1eb9c0 header_size: 12324 notes64: 56471f1eba00 load64: 56471f1eba38 notes32: 0 load32: 0 vmcoreinfo: 0 size_vmcoreinfo: 0 Elf64_Phdr: p_type: 4 (PT_NOTE) p_flags: 0 p_offset: 2a8 p_vaddr: 0 p_paddr: 0 p_filesz: 11644 p_memsz: 0 p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 7fffaa404000 p_vaddr: ffffffffaa400000 p_paddr: b8600000 p_filesz: 33751040 p_memsz: 33751040 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 286600004000 p_vaddr: ffffa86600000000 p_paddr: ffffffffffffffff p_filesz: 35184372088831 p_memsz: 35184372088831 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 7fffc0004000 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: 126ac0005000 p_vaddr: ffff926ac0001000 p_paddr: 1000 p_filesz: 647168 p_memsz: 647168 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 4d8880004000 p_vaddr: ffffcd8880000000 p_paddr: ffffffffffffffff p_filesz: 12288 p_memsz: 12288 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 126ac0104000 p_vaddr: ffff926ac0100000 p_paddr: 100000 p_filesz: 12902400 p_memsz: 12902400 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 4d8880008000 p_vaddr: ffffcd8880004000 p_paddr: ffffffffffffffff p_filesz: 204800 p_memsz: 204800 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 126ac0d53000 p_vaddr: ffff926ac0d4f000 p_paddr: d4f000 p_filesz: 3207118848 p_memsz: 3207118848 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 126bc0004000 p_vaddr: ffff926bc0000000 p_paddr: 100000000 p_filesz: 4294967296 p_memsz: 4294967296 p_align: 4096 Elf64_Phdr: p_type: 1 (PT_LOAD) p_flags: 7 p_offset: 4d8884004000 p_vaddr: ffffcd8884000000 p_paddr: ffffffffffffffff p_filesz: 67108864 p_memsz: 67108864 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: 7808 n_type: 4 (NT_TASKSTRUCT) Elf64_Nhdr: n_namesz: 11 ("VMCOREINFO") n_descsz: 3279 n_type: 0 (unknown) OSRELEASE=6.1.118-yocto-standard BUILD-ID=1400000003000000474e5500a343709706409b9c PAGESIZE=4096 SYMBOL(init_uts_ns)=ffffffffac037a80 OFFSET(uts_namespace.name)=0 SYMBOL(node_online_map)=ffffffffac06d3e8 SYMBOL(swapper_pg_dir)=ffffffffabe0a000 SYMBOL(_stext)=ffffffffaa400000 SYMBOL(vmap_area_list)=ffffffffabf12fb0 SYMBOL(mem_section)=ffff926cbfff5000 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)=15616 SIZE(zone)=1600 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_dtor)=16 OFFSET(page.compound_order)=17 OFFSET(page.compound_head)=8 OFFSET(pglist_data.node_zones)=0 OFFSET(pglist_data.nr_zones)=14624 OFFSET(pglist_data.node_start_pfn)=14632 OFFSET(pglist_data.node_spanned_pages)=14648 OFFSET(pglist_data.node_id)=14656 OFFSET(zone.free_area)=192 OFFSET(zone.vm_stat)=1472 OFFSET(zone.spanned_pages)=136 OFFSET(free_area.free_list)=0 OFFSET(list_head.next)=0 OFFSET(list_head.prev)=8 OFFSET(vmap_area.va_start)=0 OFFSET(vmap_area.list)=40 LENGTH(zone.free_area)=11 SYMBOL(prb)=ffffffffabe647d8 SYMBOL(printk_rb_static)=ffffffffabe647e0 SYMBOL(clear_seq)=ffffffffac307f20 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)=4 NUMBER(PG_private)=13 NUMBER(PG_swapcache)=10 NUMBER(PG_swapbacked)=19 NUMBER(PG_slab)=9 NUMBER(PG_hwpoison)=23 NUMBER(PG_head_mask)=65536 NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE)=-129 NUMBER(HUGETLB_PAGE_DTOR)=2 NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE)=-257 SYMBOL(kallsyms_names)=ffffffffaba0f7d8 SYMBOL(kallsyms_num_syms)=ffffffffaba0f7d0 SYMBOL(kallsyms_token_table)=ffffffffabbf5400 SYMBOL(kallsyms_token_index)=ffffffffabbf5788 SYMBOL(kallsyms_offsets)=ffffffffab9984f8 SYMBOL(kallsyms_relative_base)=ffffffffaba0f7c8 NUMBER(phys_base)=2384461824 SYMBOL(init_top_pgt)=ffffffffabe0a000 NUMBER(pgtable_l5_enabled)=0 SYMBOL(node_data)=ffffffffac06c3a0 LENGTH(node_data)=64 KERNELOFFSET=29400000 NUMBER(KERNEL_IMAGE_SIZE)=1073741824 NUMBER(sme_mask)=0 readmem: read_proc_kcore() -> /proc/kcore VMCOREINFO: NUMBER(phys_base): 2384461824 -> 8e200000 gdb /boot/vmlinux-6.1.118-yocto-standard 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-wrs-linux". 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: ffffffff8292c360, KVADDR, "page_offset_base", 8, (FOE|Q), 56471ef799c8> <read_proc_kcore: addr: ffffffff8292c360 paddr: 90b2c360 cnt: 8> crash: seek error: kernel virtual address: ffffffff8292c360 type: "page_offset_base" -- 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