linux-kernel - [lkp] [mm, vmscan] 7afa13d0ba: kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] SMP KASAN

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Date:	Wed, 27 Jan 2016 09:37:09 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Mel Gorman <mgorman@...hsingularity.net>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: [lkp] [mm, vmscan] 7afa13d0ba: kasan: GPF could be caused by
 NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1]
 SMP KASAN

FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux-balancenuma mm-vmscan-node-lru-v2r25
commit 7afa13d0bac733288e6b45bbb17a7f4c3960523e ("mm, vmscan: Move LRU lists to node")


+------------------------------------------------------------------------+------------+------------+
|                                                                        | 47f7608253 | 7afa13d0ba |
+------------------------------------------------------------------------+------------+------------+
| boot_successes                                                         | 2          | 0          |
| boot_failures                                                          | 8          | 12         |
| IP-Config:Auto-configuration_of_network_failed                         | 8          |            |
| ptr_deref_or_user_memory_accessgeneral_protection_fault:#[##]SMP_KASAN | 0          | 12         |
| RIP:cpu_vm_stats_fold                                                  | 0          | 12         |
| Kernel_panic-not_syncing:Fatal_exception                               | 0          | 12         |
| backtrace:debug_hotplug_cpu                                            | 0          | 12         |
| backtrace:kernel_init_freeable                                         | 0          | 12         |
+------------------------------------------------------------------------+------------+------------+



[    5.548506] rtc-test rtc-test.0: setting system clock to 2016-01-26 09:20:10 UTC (1453800010)
[    5.550633] Unregister pv shared memory for cpu 0
[    5.558220] kasan: CONFIG_KASAN_INLINE enabled
[    5.558752] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] SMP KASAN
[    5.561515] Modules linked in:
[    5.562365] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.5.0-rc1-00005-g7afa13d #1
[    5.563991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[    5.565751] task: ffff88002e608000 ti: ffff88002e610000 task.ti: ffff88002e610000
[    5.567367] RIP: 0010:[<ffffffff8521af67>]  [<ffffffff8521af67>] cpu_vm_stats_fold+0x285/0x35a
[    5.569171] RSP: 0018:ffff88002e617a98  EFLAGS: 00010202
[    5.570174] RAX: 000000000001efe0 RBX: 000000000001efe1 RCX: 0000000000003dfc
[    5.571369] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff880038740c80
[    5.572566] RBP: ffff88002e617bf0 R08: 0000000000000001 R09: 0000000000000002
[    5.573759] R10: ffff88002e6bfb90 R11: ffffed0005cc2f6d R12: ffff880038740c88
[    5.574952] R13: dffffc0000000000 R14: ffff88003873d000 R15: ffff88002e617ae8
[    5.576150] FS:  0000000000000000(0000) GS:ffff88002eb00000(0000) knlGS:0000000000000000
[    5.577836] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    5.578888] CR2: 00007fa3ebbe4a30 CR3: 0000000005e0c000 CR4: 00000000000406a0
[    5.580082] Stack:
[    5.580740]  1ffffffff0c07388 ffffffff86039c40 ffff88002ea1f051 ffff88002e617b08
[    5.582615]  1ffff10005cc2f59 ffff88003873dd78 0000000041b58ab3 ffffffff85c86100
[    5.584480]  ffffffff8521ace2 ffffea0000fff000 0000000000000000 0000000000000000
[    5.586355] Call Trace:
[    5.587070]  [<ffffffff8521ace2>] ? inc_node_state+0x15/0x15
[    5.588112]  [<ffffffff851f90b7>] ? free_pcppages_bulk+0x1fb/0x27c
[    5.589210]  [<ffffffff85217d44>] ? next_zone+0x46/0x49
[    5.590210]  [<ffffffff851f9370>] page_alloc_cpu_notify+0x2e/0x3c
[    5.591301]  [<ffffffff8510c1b4>] notifier_call_chain+0xb0/0xf6
[    5.592374]  [<ffffffff8510c282>] __raw_notifier_call_chain+0x9/0xb
[    5.593485]  [<ffffffff850d345f>] __cpu_notify+0x1b/0x30
[    5.594497]  [<ffffffff850d3482>] cpu_notify+0xe/0x10
[    5.595476]  [<ffffffff850d35e2>] cpu_notify_nofail+0x9/0x11
[    5.596517]  [<ffffffff850d39eb>] _cpu_down+0x2d6/0x58e
[    5.597514]  [<ffffffff8525d77e>] ? free_debug_processing+0x19a/0x21b
[    5.598646]  [<ffffffff850d3715>] ? cpu_hotplug_done+0x1d/0x1d
[    5.599706]  [<ffffffff8511485f>] ? ___might_sleep+0x64/0x23a
[    5.600759]  [<ffffffff850d3cc8>] cpu_down+0x25/0x32
[    5.601730]  [<ffffffff85010e77>] _debug_hotplug_cpu+0x4b/0x141
[    5.602796]  [<ffffffff86066975>] ? topology_init+0xd3/0xd3
[    5.603836]  [<ffffffff86066982>] debug_hotplug_cpu+0xd/0x11
[    5.604883]  [<ffffffff850004d5>] do_one_initcall+0x1aa/0x265
[    5.605939]  [<ffffffff8500032b>] ? try_to_run_init_process+0x31/0x31
[    5.607069]  [<ffffffff85109600>] ? parse_args+0x4e1/0x62b
[    5.608098]  [<ffffffff8605e731>] kernel_init_freeable+0x2b9/0x34f
[    5.609196]  [<ffffffff859d6cd8>] ? rest_init+0xaf/0xaf
[    5.610195]  [<ffffffff859d6ce4>] kernel_init+0xc/0xee
[    5.611180]  [<ffffffff859d6cd8>] ? rest_init+0xaf/0xaf
[    5.612183]  [<ffffffff859e000f>] ret_from_fork+0x3f/0x70
[    5.613208]  [<ffffffff859d6cd8>] ? rest_init+0xaf/0xaf
[    5.614207] Code: 00 00 4d 8d a6 88 3c 00 00 4c 8d bd f8 fe ff ff 49 bd 00 00 00 00 00 fc ff df 48 8d 58 01 48 89 d9 48 89 de 48 c1 e9 03 83 e6 07 <42> 8a 0c 29 40 38 f1 7f 0c 84 c9 74 08 48 89 df e8 6f 53 04 00 
[    5.621660] RIP  [<ffffffff8521af67>] cpu_vm_stats_fold+0x285/0x35a
[    5.622832]  RSP <ffff88002e617a98>
[    5.623669] ---[ end trace 757bbc84cd1f3edc ]---
[    5.624617] Kernel panic - not syncing: Fatal exception





Thanks,
Ying Huang

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