linux-kernel - [kvm] b916ec9e0b: BUG:unable_to_handle

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Date:   Tue, 6 Mar 2018 01:48:48 +0800
From:   kernel test robot <fengguang.wu@...el.com>
To:     Thomas Garnier <thgarnie@...gle.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Thomas Garnier <thgarnie@...gle.com>, lkp@...org
Subject: [kvm]  b916ec9e0b: BUG:unable_to_handle_kernel


FYI, we noticed the following commit (built with gcc-7):

commit: b916ec9e0bd05841928f4352076c700a2f8e8d03 ("kvm: Adapt assembly for PIE support")
https://github.com/thgarnie/linux.git kaslr_pie_v2

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G

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


+------------------------------------------------------------------+------------+------------+
|                                                                  | a0cf071d8a | b916ec9e0b |
+------------------------------------------------------------------+------------+------------+
| boot_successes                                                   | 0          | 0          |
| boot_failures                                                    | 7          | 16         |
| invoked_oom-killer:gfp_mask=0x                                   | 7          | 2          |
| Mem-Info                                                         | 7          | 2          |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 7          | 2          |
| BUG:unable_to_handle_kernel                                      | 0          | 14         |
| Oops:#[##]                                                       | 0          | 14         |
| RIP:__raw_callee_save___kvm_vcpu_is_preempted                    | 0          | 14         |
| Kernel_panic-not_syncing:Fatal_exception                         | 0          | 14         |
+------------------------------------------------------------------+------------+------------+



[    0.050553] BUG: unable to handle kernel paging request at 0000000000016250
[    0.051000] IP: __raw_callee_save___kvm_vcpu_is_preempted+0xb/0x20
[    0.051000] PGD 0 P4D 0 
[    0.051000] Oops: 0000 [#1] SMP PTI
[    0.051000] Modules linked in:
[    0.051000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.16.0-rc3-next-20180301-05054-gb916ec9 #1
[    0.051000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[    0.051000] RIP: 0010:__raw_callee_save___kvm_vcpu_is_preempted+0xb/0x20
[    0.051000] RSP: 0000:ffffc90000633c98 EFLAGS: 00010046
[    0.051000] RAX: ffff88013fd00000 RBX: ffffffff82b19578 RCX: 0000000000000001
[    0.051000] RDX: 0000000000008000 RSI: 0000000000000000 RDI: 0000000000000001
[    0.051000] RBP: ffff88013fc23500 R08: 0000000000000001 R09: 0000000000000000
[    0.051000] R10: ffff88013300f6f0 R11: 0000000000000001 R12: ffff88013fd23500
[    0.051000] R13: 0000000000000001 R14: 0000000000040000 R15: ffff88013fc23544
[    0.051000] FS:  0000000000000000(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000
[    0.051000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.051000] CR2: 0000000000016250 CR3: 000000000220a000 CR4: 00000000000006f0
[    0.051000] Call Trace:
[    0.051000]  __pv_queued_spin_lock_slowpath+0x218/0x280
[    0.051000]  check_tsc_warp+0xaa/0x170
[    0.051000]  check_tsc_sync_source+0x8f/0x1c0
[    0.051000]  native_cpu_up+0x3dc/0x930
[    0.051000]  ? cpuhp_kick_ap+0x70/0x70
[    0.051000]  bringup_cpu+0x2b/0xa0
[    0.051000]  cpuhp_invoke_callback+0x8a/0x5c0
[    0.051000]  ? ring_buffer_record_is_on+0x10/0x10
[    0.051000]  _cpu_up+0xad/0x170
[    0.051000]  ? set_debug_rodata+0x11/0x11
[    0.051000]  do_cpu_up+0x82/0xa0
[    0.051000]  smp_init+0xc5/0xca
[    0.051000]  kernel_init_freeable+0x10d/0x21e
[    0.051000]  ? rest_init+0xd0/0xd0
[    0.051000]  kernel_init+0xa/0x110
[    0.051000]  ret_from_fork+0x35/0x40
[    0.051000] Code: 48 83 c4 08 89 d8 5b 5d 41 5c c3 bb ea ff ff ff e9 42 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 48 8d 05 69 30 12 01 48 8b 04 f8 <48> 03 05 6e 3e fb 7e 80 38 00 0f 95 c0 c3 0f 1f 80 00 00 00 00 
[    0.051000] RIP: __raw_callee_save___kvm_vcpu_is_preempted+0xb/0x20 RSP: ffffc90000633c98
[    0.051000] CR2: 0000000000016250
[    0.051000] ---[ end trace 34c84f63453fdd06 ]---


To reproduce:

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



Thanks,
lkp

View attachment "config-4.16.0-rc3-next-20180301-05054-gb916ec9" of type "text/plain" (163890 bytes)

View attachment "job-script" of type "text/plain" (4267 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (5912 bytes)