linux-kernel - [x86] d5c5dc4bef: PANIC:early

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Date:   Thu, 27 Jul 2017 21:07:52 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        x86@...nel.org, boris.ostrovsky@...cle.com, hpa@...or.com,
        tglx@...utronix.de, mingo@...hat.com,
        Juergen Gross <jgross@...e.com>, lkp@...org
Subject: [x86]  d5c5dc4bef: PANIC:early_exception

FYI, we noticed the following commit:

commit: d5c5dc4befe6cbec1b4d2c961bfa1075d51de4f6 ("x86: provide an init_mem_mapping hypervisor hook")
url: https://github.com/0day-ci/linux/commits/Juergen-Gross/fix-xen-hvm-guest-with-kaslr-enabled/20170727-083556
base: https://git.kernel.org/cgit/linux/kernel/git/xen/tip.git linux-next

in testcase: boot

on test machine: qemu-system-x86_64 -m 420M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+-------------------------------+------------+------------+
|                               | 96edd61dcf | d5c5dc4bef |
+-------------------------------+------------+------------+
| boot_successes                | 15         | 4          |
| boot_failures                 | 0          | 4          |
| PANIC:early_exception         | 0          | 4          |
| BUG:kernel_hang_in_boot_stage | 0          | 4          |
+-------------------------------+------------+------------+



[    0.000000] Base memory trampoline at [ffff880000099000] 99000 size 24576
[    0.000000] BRK [0x02515000, 0x02515fff] PGTABLE
[    0.000000] BRK [0x02516000, 0x02516fff] PGTABLE
[    0.000000] BRK [0x02517000, 0x02517fff] PGTABLE
[    0.000000] BRK [0x02518000, 0x02518fff] PGTABLE
PANIC: early exception 0x0e IP 10:ffffffff821003d1 error 0 cr2 0x28
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.13.0-rc1-00416-gd5c5dc4 #1
[    0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[    0.000000] task: ffffffff81e10480 task.stack: ffffffff81e00000
[    0.000000] RIP: 0010:init_mem_mapping+0x257/0x26d
[    0.000000] RSP: 0000:ffffffff81e03e20 EFLAGS: 00000082 ORIG_RAX: 0000000000000000
[    0.000000] RAX: 0000000000000000 RBX: 0000000000100000 RCX: ffffffff81e03de0
[    0.000000] RDX: 0000000000000630 RSI: 0000000000000400 RDI: 0000000000000046
[    0.000000] RBP: ffffffff81e03e48 R08: 0000000000000000 R09: 0000000000000001
[    0.000000] R10: ffffffff81e03e20 R11: 383135323078305b R12: 0000000018800000
[    0.000000] R13: 000000001a3e0000 R14: 0000000018700000 R15: 0000000020000000
[    0.000000] FS:  0000000000000000(0000) GS:ffffffff820c2000(0000) knlGS:0000000000000000
[    0.000000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.000000] CR2: 0000000000000028 CR3: 0000000001e09000 CR4: 00000000000006b0
[    0.000000] Call Trace:
[    0.000000]  setup_arch+0x662/0xca3
[    0.000000]  ? printk+0x43/0x4b
[    0.000000]  ? early_idt_handler_array+0x120/0x120
[    0.000000]  start_kernel+0x64/0x405
[    0.000000]  ? early_idt_handler_array+0x120/0x120
[    0.000000]  x86_64_start_reservations+0x2a/0x2c
[    0.000000]  x86_64_start_kernel+0x13e/0x14d
[    0.000000]  secondary_startup_64+0x9f/0x9f
[    0.000000] Code: ff 14 25 18 cc d8 81 48 8b 05 e0 d2 f9 ff 0f ba e0 0d 73 09 ff 14 25 40 cc d8 81 eb 07 ff 14 25 38 cc d8 81 48 8b 05 9f 09 26 00 <48> 8b 40 28 48 85 c0 74 02 ff d0 5b 41 5c 41 5d 41 5e 41 5f 5d 

Elapsed time: 510
BUG: kernel hang in boot stage

initrds=(
	/osimage/yocto/yocto-tiny-i386-2016-04-22.cgz
	/lkp/scheduled/vm-lkp-os-yocto-ia32-1/boot-1-yocto-tiny-i386-2016-04-22.cgz-d5c5dc4befe6cbec1b4d2c961bfa1075d51de4f6-20170727-34117-k9lx8y-0.cgz
	/lkp/lkp/lkp-i386.cgz


To reproduce:

        git clone https://github.com/01org/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Kernel Test Robot

View attachment "config-4.13.0-rc1-00416-gd5c5dc4" of type "text/plain" (160972 bytes)

View attachment "job-script" of type "text/plain" (4007 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (2596 bytes)