Hello,
I tried running crash-head (HEAD: 5d172b230cf4) against today's linus'
master on a dump obtained via dump-guest-memory in qemu. And I got the
following when the image is loaded:
please wait... (determining panic task)
bt: read error: kernel virtual address: fffffe0000007000 type: "stack
contents"
KERNEL: vmlinux
DUMPFILE: memory-verbatim.img
CPUS: 1
DATE: Wed Apr 4 16:36:47 2018
UPTIME: 00:27:48
LOAD AVERAGE: 31.11, 17.80, 10.43
TASKS: 145
NODENAME: ubuntu-virtual
RELEASE: 4.16.0-rc7-nbor
VERSION: #570 SMP Wed Apr 4 16:03:44 EEST 2018
MACHINE: x86_64 (3392 Mhz)
MEMORY: 4 GB
PANIC: ""
PID: 0
COMMAND: "swapper/0"
TASK: ffffffff82016500 [THREAD_INFO: ffffffff82016500]
CPU: 0
STATE: TASK_RUNNING
WARNING: panic task not found
crash> bt
PID: 0 TASK: ffffffff82016500 CPU: 0 COMMAND: "swapper/0"
#0 [ffffffff82003dc8] __schedule at ffffffff817ea059
bt: invalid RSP: ffffffff82003dc8 bt->stackbase/stacktop:
ffffffff82000000/ffffffff82002000 cpu: 0
So the kernel has been compiled with : gcc (Ubuntu
5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609 which has retpoline enabled.
I have KASLR disabled: # CONFIG_RANDOMIZE_BASE is not set and the kernel
is compiled with CONFIG_FRAME_POINTER=y .
This scenario used to work around the 4.10 timeline. Am I doing
something wrong or crash still needs time to work on the latest upstream
kernel code?
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