Re: [Crash-utility] [PATCH 0/1] arm64: Fix missing offset for modules_vaddr with aarch64 guest dump
----- Original Message -----
From: Masayoshi Mizuma <m.mizuma(a)jp.fujitsu.com>
Fix for aarch64 with Linux v5.0 and later kernels that
contains commit 91fc957c9b1d ("arm64/bpf: don't allocate
BPF JIT programs in module memory") and the memory dump
is captured by virsh dump.
Note: Another two issues remain for the memory dump captured by
virsh dump with aarch64.
I'm confused -- the vmcoreinfo data has been passed to the KVM host
for the virsh dump for quite some time now. Is it not passed back
to the host on aarch64?
Dave
I
1. KASLR
crash doesn't work in case KASLR is enabled on the guest.
That is because the memory dump doesn't have vmcoreinfo, so we
cannot get the relocation position.
I suppose we need to implement calc_kaslr_offset() for aarch64.
nokaslr with the guest kernel parameter is a workaround.
2. VA_BITS
crash doesn't work in case the guest kernel is v5.4 and later.
That is because the memory dump doesn't have vmcoreinfo, so we
cannot get vabits_actual.
I think there's no workaround so far...
Masayoshi Mizuma (1):
arm64: Fix missing offset for modules_vaddr with aarch64 guest dump
arm64.c | 2 ++
defs.h | 3 +++
2 files changed, 5 insertions(+)
--
2.18.1
--
Crash-utility mailing list
Crash-utility(a)redhat.com
https://www.redhat.com/mailman/listinfo/crash-utility