Bug 1876589
| Summary: | Crash utility cannot analyse a core dump image from virsh | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Kappa <commodorekappa+redhat> |
| Component: | crash | Assignee: | lijiang |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | rawhide | CC: | jieli, lijiang, ruqin, xiawu |
| Target Milestone: | --- | Keywords: | Reopened |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | crash-7.3.0-1.fc35 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-06-17 01:48:21 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This message is a reminder that Fedora 32 is nearing its end of life. Fedora will stop maintaining and issuing updates for Fedora 32 on 2021-05-25. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '32'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 32 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. Fedora 32 changed to end-of-life (EOL) status on 2021-05-25. Fedora 32 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. Crash can not still work on the latest Fedora vmcore from "virsh dump". It reported a failure of initialization and eventually failed on the "qemu_load()". So reopen this issue and move it to rawhide. Thanks. Hi, Emma, Ruowen and Kappa It doesn't support to analyze a vmcore dumped by "virsh dump domain file", the vmcore must be dumped with option "--memory-only", otherwise it will fail to analyze vmcore. Important The crash utility no longer supports the default core dump file format of the virsh dump command. If you use crash to analyze a core dump file created by virsh dump, you must use the --memory-only option. Here is a documentation link: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-domain_commands-creating_a_dump_file_of_a_domains_core Thanks. Hi, Kappa Would you mind trying it again with the following command? I didn't see this issue on the latest crash-utility. # virsh dump fedora34 /tmp/vmcore --memory-only --format=kdump-lzo Domain 'fedora34' dumped to /tmp/vmcore # crash /usr/lib/debug/usr/lib/modules/5.12.9-300.fc34.x86_64/vmlinux /tmp/vmcore crash 7.3.0-1.fc34 Copyright (C) 2002-2021 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, 2020-2021 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, 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. GNU gdb (GDB) 7.6 Copyright (C) 2013 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-unknown-linux-gnu"... WARNING: kernel relocated [192MB]: patching 134298 gdb minimal_symbol values KERNEL: /usr/lib/debug/usr/lib/modules/5.12.9-300.fc34.x86_64/vmlinux DUMPFILE: /tmp/vmcore [PARTIAL DUMP] CPUS: 4 DATE: Tue Jun 15 05:24:18 EDT 2021 UPTIME: 00:31:45 LOAD AVERAGE: 0.00, 0.00, 0.00 TASKS: 175 NODENAME: fedora RELEASE: 5.12.9-300.fc34.x86_64 VERSION: #1 SMP Thu Jun 3 13:51:40 UTC 2021 MACHINE: x86_64 (2499 Mhz) MEMORY: 8 GB PANIC: "" PID: 0 COMMAND: "swapper/0" TASK: ffffffff8ea1a940 (1 of 4) [THREAD_INFO: ffffffff8ea1a940] CPU: 0 STATE: TASK_RUNNING (ACTIVE) WARNING: panic task not found crash> bt PID: 0 TASK: ffffffff8ea1a940 CPU: 0 COMMAND: "swapper/0" [exception RIP: native_safe_halt+14] RIP: ffffffff8dbf6e5e RSP: ffffffff8ea03eb0 RFLAGS: 00000206 RAX: ffffffff8dbf6d00 RBX: 0000000000000000 RCX: ffff99e7b7c2b180 RDX: 0000000000000000 RSI: 0000000000000083 RDI: 0000000000000000 RBP: ffffffff8ea1a940 R8: 000001beef6153db R9: 0000000000000004 R10: 0000000000000a08 R11: 0000000000000cb5 R12: 0000000000000000 R13: 0000000000000000 R14: 000000000000008e R15: 000000000026b508 CS: 0010 SS: 0018 #0 [ffffffff8ea03eb0] default_idle at ffffffff8dbf6d0a #1 [ffffffff8ea03eb8] default_idle_call at ffffffff8dbf6f78 #2 [ffffffff8ea03ec0] do_idle at ffffffff8d114d00 #3 [ffffffff8ea03ef8] cpu_startup_entry at ffffffff8d114f09 #4 [ffffffff8ea03f08] start_kernel at ffffffff8f258631 #5 [ffffffff8ea03f50] secondary_startup_64_no_verify at ffffffff8d000107 crash> kmem -s CACHE OBJSIZE ALLOCATED TOTAL SLABS SSIZE NAME ffff99e646013a00 216 0 0 0 4k nf_conntrack_expect ffff99e646013000 256 48 125 5 8k nf_conntrack ffff99e64a5b5500 184 0 0 0 4k nf-frags ffff99e64a5b5b00 640 22 23 1 16k rpc_inode_cache ffff99e6462c3500 2048 15 16 1 32k rpc_buffers ffff99e6462c3b00 232 15 16 1 4k rpc_tasks ffff99e649d35e00 736 42 44 2 16k fat_inode_cache ffff99e649d35100 32 0 0 0 4k fat_cache ffff99e647b09000 136 0 0 0 4k kvm_async_pf ffff99e647b09f00 9728 0 0 0 32k kvm_vcpu ffff99e647b09d00 184 0 0 0 4k kvm_mmu_page_header ffff99e647b09300 32 0 0 0 4k pte_list_desc ffff99e647b09600 2672 0 0 0 32k x86_emulator ffff99e647b09200 4160 0 0 0 32k x86_fpu ffff99e646013f00 48 84 85 1 4k zspage ffff99e646013d00 8 511 512 1 4k zs_handle ffff99e647b09c00 152 0 0 0 4k fuse_request ffff99e647b09900 824 0 0 0 16k fuse_inode ffff99e6464d0600 528 0 0 0 16k xfs_dqtrx ffff99e6464d0200 496 0 0 0 8k xfs_dquot ffff99e6464d0c00 360 2159 2163 103 8k xfs_buf ffff99e649d35400 200 0 0 0 4k xfs_bui_item ffff99e649d35700 168 0 0 0 4k xfs_bud_item ffff99e649d35800 424 0 0 0 8k xfs_cui_item ffff99e649d35a00 168 0 0 0 4k xfs_cud_item ffff99e6409c9000 680 0 0 0 16k xfs_rui_item ffff99e6409c9f00 168 0 0 0 4k xfs_rud_item ffff99e6409c9d00 176 0 0 0 4k xfs_icr ffff99e6409c9300 192 113 126 6 4k xfs_ili ffff99e6409c9600 960 9490 9504 594 16k xfs_inode ffff99e6409c9200 424 50 57 3 8k xfs_efi_item crash> It could run okay with Fedora 34 now. But previously, at specific conditions, the virsh dump memory/core has problem. It happened when the guest is at 100% processing power or hanged. I tried to reproduce the problem (waiting for VM to hang) and try to run the virsh dump command. Also, I used --memory-only option when I run the dump command in the past (https://bugzilla.redhat.com/show_bug.cgi?id=1876589#c0) Usually the guest reboot by itself or hanged and used 100% processing power. If it reboot my itself I can't run the virsh dump. Usually the problem happened again within a few days. When the guest VM has problem, I have test the virsh dump on it. The crash program is okay now. Version is crash-7.3.0-1.fc34.x86_64. Thank you for the confirmation, Kappa. This has been fixed on Fedora 34(crash-7.3.0-1.fc34) and rawhide(crash-7.3.0-1.fc35), so I will close it as current release. https://src.fedoraproject.org/rpms/crash |
Description of problem: Having some KVM guest OS utilizing 100% of processing power and is not responsive. Used virsh dump to dump an image but it cannot be analyzed by crash utility. The Host and Guest also run Fedora 32. crash 7.2.8-2.fc32 Copyright (C) 2002-2020 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 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, 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. vmcore_data: flags: c0 (KDUMP_LOCAL|KDUMP_ELF64) ndfd: 3 ofp: 7fab709d9500 header_size: 2144 num_pt_load_segments: 7 pt_load_segment[0]: file_offset: 860 phys_start: 0 phys_end: a0000 zero_fill: 0 pt_load_segment[1]: file_offset: a0860 phys_start: c0000 phys_end: 80000000 zero_fill: 0 pt_load_segment[2]: file_offset: 7ffe0860 phys_start: f0000000 phys_end: f4000000 zero_fill: 0 pt_load_segment[3]: file_offset: 83fe0860 phys_start: f4000000 phys_end: f8000000 zero_fill: 0 pt_load_segment[4]: file_offset: 87fe0860 phys_start: f9a10000 phys_end: f9a12000 zero_fill: 0 pt_load_segment[5]: file_offset: 87fe2860 phys_start: fffc0000 phys_end: 100000000 zero_fill: 0 pt_load_segment[6]: file_offset: 88022860 phys_start: 100000000 phys_end: 148000000 zero_fill: 0 elf_header: 55d7fec6b400 elf32: 0 notes32: 0 load32: 0 elf64: 55d7fec6b400 notes64: 55d7fec6b440 load64: 55d7fec6b478 sect0_64: 0 nt_prstatus: 55d7fec6b600 nt_prpsinfo: 0 nt_taskstruct: 0 task_struct: 0 arch_data1: (unused) arch_data2: (unused) switch_stack: 0 page_size: 0 xen_kdump_data: (unused) num_prstatus_notes: 2 num_qemu_notes: 2 vmcoreinfo: 0 size_vmcoreinfo: 0 nt_prstatus_percpu: 000055d7fec6b600 000055d7fec6b764 nt_qemu_percpu: 000055d7fec6b8dc 000055d7fec6baa8 backup_src_start: 0 backup_src_size: 0 backup_offset: 0 Elf64_Ehdr: e_ident: \177ELF e_ident[EI_CLASS]: 2 (ELFCLASS64) e_ident[EI_DATA]: 1 (ELFDATA2LSB) e_ident[EI_VERSION]: 1 (EV_CURRENT) e_ident[EI_OSABI]: 0 (ELFOSABI_SYSV) e_ident[EI_ABIVERSION]: 0 e_type: 4 (ET_CORE) e_machine: 62 (EM_X86_64) e_version: 1 (EV_CURRENT) e_entry: 0 e_phoff: 40 e_shoff: 0 e_flags: 0 e_ehsize: 40 e_phentsize: 38 e_phnum: 8 e_shentsize: 0 e_shnum: 0 e_shstrndx: 0 Elf64_Phdr: p_type: 4 (PT_NOTE) p_offset: 512 (200) p_vaddr: 0 p_paddr: 0 p_filesz: 1632 (660) p_memsz: 1632 (660) p_flags: 0 () p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_offset: 2144 (860) p_vaddr: 0 p_paddr: 0 p_filesz: 655360 (a0000) p_memsz: 655360 (a0000) p_flags: 0 () p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_offset: 657504 (a0860) p_vaddr: c0000 p_paddr: c0000 p_filesz: 2146697216 (7ff40000) p_memsz: 2146697216 (7ff40000) p_flags: 0 () p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_offset: 2147354720 (7ffe0860) p_vaddr: f0000000 p_paddr: f0000000 p_filesz: 67108864 (4000000) p_memsz: 67108864 (4000000) p_flags: 0 () p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_offset: 2214463584 (83fe0860) p_vaddr: f4000000 p_paddr: f4000000 p_filesz: 67108864 (4000000) p_memsz: 67108864 (4000000) p_flags: 0 () p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_offset: 2281572448 (87fe0860) p_vaddr: f9a10000 p_paddr: f9a10000 p_filesz: 8192 (2000) p_memsz: 8192 (2000) p_flags: 0 () p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_offset: 2281580640 (87fe2860) p_vaddr: fffc0000 p_paddr: fffc0000 p_filesz: 262144 (40000) p_memsz: 262144 (40000) p_flags: 0 () p_align: 0 Elf64_Phdr: p_type: 1 (PT_LOAD) p_offset: 2281842784 (88022860) p_vaddr: 100000000 p_paddr: 100000000 p_filesz: 1207959552 (48000000) p_memsz: 1207959552 (48000000) p_flags: 0 () p_align: 0 Elf64_Nhdr: n_namesz: 5 ("CORE") n_descsz: 336 n_type: 1 (NT_PRSTATUS) si.signo: 0 si.code: 0 si.errno: 0 cursig: 0 sigpend: 0 sighold: 0 pid: 1 ppid: 0 pgrp: 0 sid:0 utime: 0.000000 stime: 0.000000 cutime: 0.000000 cstime: 0.000000 ORIG_RAX: 0 fpvalid: 0 R15: ffffa522c0003e20 R14: 0000000000000000 R13: 0000000000000001 R12: 0000000000000033 RBP: 00000000000003ac RBX: 0000000000000046 R11: 000000000002bf40 R10: 00000000000003ab R9: ffffffff953f7c44 R8: 0000001d7358df44 RAX: 0000000000000001 RCX: ffff9116c1f88000 RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffffffff953f7c30 RIP: ffffffff931497c4 RFLAGS: 0000000000000002 RSP: ffffa522c0003dd0 FS_BASE: 0000000000000000 GS_BASE: ffff9116c4a00000 CS: 0010 SS: 0018 DS: 0000 ES: 0000 FS: 0000 GS: 0000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000001 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ffffa522c0003e20 0000000000000000 0000000000000001 0000000000000033 00000000000003ac 0000000000000046 000000000002bf40 00000000000003ab ffffffff953f7c44 0000001d7358df44 0000000000000001 ffff9116c1f88000 0000000000000001 0000000000000002 ffffffff953f7c30 0000000000000000 ffffffff931497c4 0000000000000010 0000000000000002 ffffa522c0003dd0 0000000000000018 0000000000000000 ffff9116c4a00000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Elf64_Nhdr: n_namesz: 5 ("CORE") n_descsz: 336 n_type: 1 (NT_PRSTATUS) si.signo: 0 si.code: 0 si.errno: 0 cursig: 0 sigpend: 0 sighold: 0 pid: 2 ppid: 0 pgrp: 0 sid:0 utime: 0.000000 stime: 0.000000 cutime: 0.000000 cstime: 0.000000 ORIG_RAX: 0 fpvalid: 0 R15: 0000000000000001 R14: 000000000000000b R13: 0000000000000000 R12: 0000000000000046 RBP: ffffa522c05dfe08 RBX: 0000000000000001 R11: 0000000000000000 R10: 0000000000000000 R9: 0000000000000000 R8: 0000000000000000 RAX: 0000000000000001 RCX: ffff9116c4001308 RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff9538506c RIP: ffffffff9313ac20 RFLAGS: 0000000000000002 RSP: ffffa522c05dfd58 FS_BASE: 00007f205bfa1740 GS_BASE: ffff9116c4b00000 CS: 0010 SS: 0000 DS: 0000 ES: 0000 FS: 0000 GS: 0000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000002 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000001 000000000000000b 0000000000000000 0000000000000046 ffffa522c05dfe08 0000000000000001 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000001 ffff9116c4001308 0000000000000001 0000000000000001 ffffffff9538506c 0000000000000000 ffffffff9313ac20 0000000000000010 0000000000000002 ffffa522c05dfd58 0000000000000000 00007f205bfa1740 ffff9116c4b00000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Elf64_Nhdr: n_namesz: 5 ("QEMU") n_descsz: 440 n_type: 0 (QEMUCPUState) version: 1 size: 440 RAX: 0000000000000001 RBX: 0000000000000046 RCX: ffff9116c1f88000 RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffffffff953f7c30 RSP: ffffa522c0003dd0 RBP: 00000000000003ac RIP: ffffffff931497c4 RFLAGS: 0000000000000002 R8: 0000001d7358df44 R9: ffffffff953f7c44 R10: 00000000000003ab R11: 000000000002bf40 R12: 0000000000000033 R13: 0000000000000001 R14: 0000000000000000 R15: ffffa522c0003e20 CS: selector: 0010 limit: ffffffff flags: 00a09b00 pad: 00000000 base: 0000000000000000 DS: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: 0000000000000000 ES: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: 0000000000000000 FS: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: 0000000000000000 GS: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: ffff9116c4a00000 SS: selector: 0018 limit: ffffffff flags: 00c09300 pad: 00000000 base: 0000000000000000 LDT: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: fffffe0000000000 TR: selector: 0040 limit: 00004087 flags: 00008b00 pad: 00000000 base: fffffe0000003000 GDT: selector: 0000 limit: 0000007f flags: 00000000 pad: 00000000 base: fffffe0000001000 IDT: selector: 0000 limit: 00000fff flags: 00000000 pad: 00000000 base: fffffe0000000000 CR0: 0000000080050033 CR1: 0000000000000000 CR2: 00000000055dde3f CR3: 000000013ed6a000 CR4: 0000000000340ef0 000001b800000001 0000000000000001 0000000000000046 ffff9116c1f88000 0000000000000001 0000000000000002 ffffffff953f7c30 ffffa522c0003dd0 00000000000003ac 0000001d7358df44 ffffffff953f7c44 00000000000003ab 000000000002bf40 0000000000000033 0000000000000001 0000000000000000 ffffa522c0003e20 ffffffff931497c4 0000000000000002 ffffffff00000010 0000000000a09b00 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ffff9116c4a00000 ffffffff00000018 0000000000c09300 0000000000000000 0000000000000000 0000000000000000 fffffe0000000000 0000408700000040 0000000000008b00 fffffe0000003000 0000007f00000000 0000000000000000 fffffe0000001000 00000fff00000000 0000000000000000 fffffe0000000000 0000000080050033 0000000000000000 00000000055dde3f 000000013ed6a000 0000000000340ef0 0000000000000000 Elf64_Nhdr: n_namesz: 5 ("QEMU") n_descsz: 440 n_type: 0 (QEMUCPUState) version: 1 size: 440 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff9116c4001308 RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffffff9538506c RSP: ffffa522c05dfd58 RBP: ffffa522c05dfe08 RIP: ffffffff9313ac20 RFLAGS: 0000000000000002 R8: 0000000000000000 R9: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000046 R13: 0000000000000000 R14: 000000000000000b R15: 0000000000000001 CS: selector: 0010 limit: ffffffff flags: 00a09b00 pad: 00000000 base: 0000000000000000 DS: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: 0000000000000000 ES: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: 0000000000000000 FS: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: 00007f205bfa1740 GS: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: ffff9116c4b00000 SS: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: 0000000000000000 LDT: selector: 0000 limit: 00000000 flags: 00000000 pad: 00000000 base: fffffe0000000000 TR: selector: 0040 limit: 00004087 flags: 00008b00 pad: 00000000 base: fffffe0000034000 GDT: selector: 0000 limit: 0000007f flags: 00000000 pad: 00000000 base: fffffe0000032000 IDT: selector: 0000 limit: 00000fff flags: 00000000 pad: 00000000 base: fffffe0000000000 CR0: 0000000080050033 CR1: 0000000000000000 CR2: ffff9116bc5247d8 CR3: 0000000141232000 CR4: 0000000000340ee0 000001b800000001 0000000000000001 0000000000000001 ffff9116c4001308 0000000000000001 0000000000000001 ffffffff9538506c ffffa522c05dfd58 ffffa522c05dfe08 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000046 0000000000000000 000000000000000b 0000000000000001 ffffffff9313ac20 0000000000000002 ffffffff00000010 0000000000a09b00 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007f205bfa1740 0000000000000000 0000000000000000 ffff9116c4b00000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 fffffe0000000000 0000408700000040 0000000000008b00 fffffe0000034000 0000007f00000000 0000000000000000 fffffe0000032000 00000fff00000000 0000000000000000 fffffe0000000000 0000000080050033 0000000000000000 ffff9116bc5247d8 0000000141232000 0000000000340ee0 0000000000000000 readmem: read_kdump() <readmem: 13ed6a000, PHYSADDR, "pgd", 4096, (ROE), 55d7feca3270> <read_kdump: addr: 13ed6a000 paddr: 13ed6a000 cnt: 4096> read_netdump: addr: 0 paddr: 13ed6a000 cnt: 4096 offset: c6d8c860 PGD DIRECTORY: 13ed6a000 PAGE DIRECTORY: 147fc9067 <readmem: 147fc9000, PHYSADDR, "pud page", 4096, (FOE), 55d7feca4280> <read_kdump: addr: 147fc9000 paddr: 147fc9000 cnt: 4096> read_netdump: addr: 0 paddr: 147fc9000 cnt: 4096 offset: cffeb860 PUD: 147fc9000 => 147fc7067 <readmem: 147fc7000, PHYSADDR, "pmd page", 4096, (FOE), 55d7feca5290> <read_kdump: addr: 147fc7000 paddr: 147fc7000 cnt: 4096> read_netdump: addr: 0 paddr: 147fc7000 cnt: 4096 offset: cffe9860 PMD: 147fc7000 => 147fc6067 <readmem: 147fc6000, PHYSADDR, "page table", 4096, (FOE), 55d7feca62a0> <read_kdump: addr: 147fc6000 paddr: 147fc6000 cnt: 4096> read_netdump: addr: 0 paddr: 147fc6000 cnt: 4096 offset: cffe8860 PTE: 147fc6000 => 800000005b37d161 PAGE: 5b37d000 PTE PHYSICAL FLAGS 800000005b37d161 5b37d000 (PRESENT|ACCESSED|DIRTY|GLOBAL|NX) <readmem: 5b37d000, PHYSADDR, "idt_table", 16, (FOE), 7ffd756a2630> <read_kdump: addr: 5b37d000 paddr: 5b37d000 cnt: 16> read_netdump: addr: 0 paddr: 5b37d000 cnt: 16 offset: 5b35d860 calc_kaslr_offset: idtr=fffffe0000000000 calc_kaslr_offset: pgd=13ed6a000 calc_kaslr_offset: idtr(phys)=5b37d000 calc_kaslr_offset: divide_error(vmlinux): 0 calc_kaslr_offset: divide_error(vmcore): ffffffff93c00870 PGD DIRECTORY: 13ed6a000 PAGE DIRECTORY: 5aa0f067 <readmem: 5aa0f000, PHYSADDR, "pud page", 4096, (FOE), 55d7feca4280> <read_kdump: addr: 5aa0f000 paddr: 5aa0f000 cnt: 4096> read_netdump: addr: 0 paddr: 5aa0f000 cnt: 4096 offset: 5a9ef860 PUD: 5aa0ffe0 => 0 kaslr_helper: failed to determine which kernel was running at crash, kaslr_helper: asssuming the kdump 1st kernel. calc_kaslr_offset: kaslr_offset=ffffffff93c00870 calc_kaslr_offset: phys_base=c43ff790 crash: pv_ops exists: ARCH_PVOPS <readmem: 5a000200, PHYSADDR, "linux_banner verify", 13, (ROE|Q), 7ffd756a21f0> <read_kdump: addr: 5a000200 paddr: 5a000200 cnt: 13> read_netdump: addr: 0 paddr: 5a000200 cnt: 13 offset: 59fe0a60 gdb /data/vmlinux-5.8.4 GNU gdb (GDB) 7.6 Copyright (C) 2013 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-unknown-linux-gnu"... GETBUF(328 -> 0) GETBUF(1500 -> 1) WARNING: kernel relocated [1731MB]: patching 126940 gdb minimal_symbol values FREEBUF(1) FREEBUF(0) <readmem: ffffffff16083cc8, KVADDR, "__pgtable_l5_enabled", 4, (FOE|Q), 7ffd756a2b18> <read_kdump: addr: ffffffff16083cc8 paddr: 77ff16083cc8 cnt: 4> read_netdump: READ_ERROR: offset not found for paddr: 77ff16083cc8 crash: read error: kernel virtual address: ffffffff16083cc8 type: "__pgtable_l5_enabled"