On 29.10.20 г. 14:42 ч., Nikolay Borisov wrote: > Hello, > > I haven't been able to open a crashdump generated by 'dump-guest-memory > -z' option. When I run crash -d10 vmlinux dump.img last thing I get is: > > kaslr_helper: failed to determine which kernel was running at crash, > kaslr_helper: asssuming the kdump 1st kernel. > calc_kaslr_offset: kaslr_offset=ffffffff9ba00810 > calc_kaslr_offset: phys_base=19a5ff7f0 > crash: pv_ops exists: ARCH_PVOPS > <readmem: 137e001e0, PHYSADDR, "linux_banner verify", 13, (ROE|Q), > 7ffffe50ff50> > <read_diskdump: addr: 137e001e0 paddr: 137e001e0 cnt: 13> > read_diskdump: paddr/pfn: 137e001e0/137e00 -> cache physical page: 137e00000 > gdb vmlinux > 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 [1605MB]: patching 97581 gdb minimal_symbol values > > FREEBUF(1) > FREEBUF(0) > <readmem: ffffffff1db75260, KVADDR, "page_offset_base", 8, (FOE|Q), > 55bcc3a177e8> > <read_diskdump: addr: ffffffff1db75260 paddr: 77ff1db75260 cnt: 8> > read_diskdump: SEEK_ERROR: paddr/pfn: 77ff1db75260/77ff1db75 max_mapnr: > 140000 > crash: seek error: kernel virtual address: ffffffff1db75260 type: > "page_offset_base" > > That kernel has RANDOMIZE_BASE set to y > > I get same error when I take an image dump of a kernel booted with > nokaslr. > > My crash is freshly compiled, with HEAD commit : 915cc069ec03 x86_64: > Perform EFRAME_VERIFY always if set in x86_64_exception_frame (7 weeks > ago) <David Mair> > Ok, the porblem is that divide_error is no longer in the kernel as of upstream kernel commit 9d06c4027f21 ("x86/entry: Convert Divide Error to IDTENTRY") the correct symbol following this commit is 'asm_exc_divide_error'. I will be sending in a fix soon. -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
