linux-kernel - Re: [x86, kaslr] PANIC: early exception 0e rip 10:ffffffff8ae04c6e error 0 cr2 ffffffff81972b28

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Date:	Wed, 15 Jan 2014 20:24:01 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [x86, kaslr] PANIC: early exception 0e rip 10:ffffffff8ae04c6e
 error 0 cr2 ffffffff81972b28

Kees,

This script can reproduce the problem. Please modify the -initrd line
before use.

Usage:
        ./kvm-0day.sh vmlinuz-3.12.0-rc4-00008-g6e6a493

#!/bin/bash

kernel=$1

kvm=(
	qemu-system-x86_64 -cpu kvm64 -enable-kvm
	-kernel $kernel
	-initrd /kernel-tests/initrd/yocto-minimal-x86_64.cgz
	# -initrd /kernel-tests/initrd/yocto-minimal-i386.cgz
	# -initrd /kernel-tests/initrd/quantal-core-i386.cgz
	# -initrd /kernel-tests/initrd/quantal-core-x86_64.cgz
	-smp 2
	-m 256M
	-net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio
	-net user,vlan=0
	-net nic,vlan=1,model=e1000
	-net user,vlan=1
	-boot order=nc
	-no-reboot
	-watchdog i6300esb
	-serial stdio
	-display none
	-monitor null
)

append=(
	debug
	sched_debug
	apic=debug
	ignore_loglevel
	# dyndbg=\"func kobject_release +p\"
	sysrq_always_enabled
	panic=10
	prompt_ramdisk=0
	earlyprintk=ttyS0,115200
	console=ttyS0,115200
	console=tty0
	vga=normal
	root=/dev/ram0
	rw
)

"${kvm[@]}" --append "${append[*]}"
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