[Crash-utility] Can't read stack contents from qemu dump

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?