linux-kernel - [lkp] [mm/memblock.c] cabc3d3f73: kernel BUG at arch/x86/mm/pageattr.c:1348!

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Date:	Thu, 10 Dec 2015 10:04:17 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Alexander Kuleshov <kuleshovmail@...il.com>
CC:	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: [lkp] [mm/memblock.c] cabc3d3f73: kernel BUG at
 arch/x86/mm/pageattr.c:1348!

FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit cabc3d3f732505b3ad56009e4a8aba0c7d39a7d7 ("mm/memblock.c: use memblock_insert_region() for the empty array")


+-----------------------------------------------------------+------------+------------+
|                                                           | b0fd5507e8 | cabc3d3f73 |
+-----------------------------------------------------------+------------+------------+
| boot_successes                                            | 70         | 0          |
| boot_failures                                             | 26         | 28         |
| Kernel_panic-not_syncing:Attempted_to_kill_init!exitcode= | 26         |            |
| kernel_BUG_at_arch/x86/mm/pageattr.c                      | 0          | 28         |
| invalid_opcode:#[##]DEBUG_PAGEALLOC                       | 0          | 28         |
| RIP:__change_page_attr_set_clr                            | 0          | 28         |
| Kernel_panic-not_syncing:Fatal_exception                  | 0          | 28         |
| backtrace:set_real_mode_permissions                       | 0          | 28         |
| backtrace:kernel_init_freeable                            | 0          | 28         |
+-----------------------------------------------------------+------------+------------+



[    0.401891] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
[    0.402749] CPU: GenuineIntel Intel Xeon E312xx (Sandy Bridge) (family: 0x6, model: 0x2a, stepping: 0x1)
[    0.407809] ------------[ cut here ]------------
[    0.408497] kernel BUG at arch/x86/mm/pageattr.c:1348!
[    0.409498] invalid opcode: 0000 [#1] DEBUG_PAGEALLOC 
[    0.410280] Modules linked in:
[    0.410746] CPU: 0 PID: 1 Comm: swapper Not tainted 4.4.0-rc4-00140-gcabc3d3 #1
[    0.411798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[    0.413063] task: ffff880000128000 ti: ffff88000011c000 task.ti: ffff88000011c000
[    0.414136] RIP: 0010:[<ffffffff8102687c>]  [<ffffffff8102687c>] __change_page_attr_set_clr+0x905/0xaf7
[    0.415507] RSP: 0000:ffff88000011fce0  EFLAGS: 00010286
[    0.416273] RAX: 0000000000000001 RBX: ffff88000011fde0 RCX: ffff880000000000
[    0.417325] RDX: 0000000000000099 RSI: 000000000000009a RDI: ffffffff81000000
[    0.418303] RBP: ffff88000011fdb8 R08: 0000000000000099 R09: ffff880000000000
[    0.419280] R10: 00003fffffe00000 R11: 0000000000000067 R12: 0000000002600000
[    0.420262] R13: ffff8800025ed4c8 R14: 000000000179a000 R15: 8000000000000161
[    0.421239] FS:  0000000000000000(0000) GS:ffffffff817bc000(0000) knlGS:0000000000000000
[    0.422348] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.423134] CR2: 00000000ffffffff CR3: 00000000017ab000 CR4: 00000000000406b0
[    0.424119] Stack:
[    0.424413]  ffffffff81998b00 0000000000000000 ffff88000011fd98 0000000000000002
[    0.425500]  00ffffff81998b00 ffff88000011fd20 0000000000000000 ffff88000011fd40
[    0.426590]  ffff88000011fd88 ffffff6700000001 8000000000099163 0000000000000099
[    0.427709] Call Trace:
[    0.428059]  [<ffffffff81026bd0>] change_page_attr_set_clr+0x162/0x36b
[    0.428958]  [<ffffffff810276a8>] set_memory_ro+0x21/0x23
[    0.429708]  [<ffffffff81a226ef>] set_real_mode_permissions+0x74/0x98
[    0.430594]  [<ffffffff81a2267b>] ? map_vsyscall+0x40/0x40
[    0.431350]  [<ffffffff8100048a>] do_one_initcall+0x191/0x1a6
[    0.432141]  [<ffffffff81065751>] ? finish_task_switch+0x152/0x1b3
[    0.432993]  [<ffffffff814c2043>] ? rest_init+0xba/0xba
[    0.433717]  [<ffffffff81a20fa3>] kernel_init_freeable+0x5b/0x182
[    0.434559]  [<ffffffff814c2043>] ? rest_init+0xba/0xba
[    0.435284]  [<ffffffff814c204c>] kernel_init+0x9/0xca
[    0.435993]  [<ffffffff814ccb0f>] ret_from_fork+0x3f/0x70
[    0.436742]  [<ffffffff814c2043>] ? rest_init+0xba/0xba
[    0.437491] Code: b8 f4 ff ff ff e9 01 02 00 00 85 c0 0f 85 f9 01 00 00 83 bd 70 ff ff ff 00 75 12 48 63 43 20 39 85 74 ff ff ff 0f 8d 95 01 00 00 <0f> 0b 48 8b 7b 28 48 b9 00 00 00 00 00 88 ff ff 48 89 f8 48 8d 
[    0.441265] RIP  [<ffffffff8102687c>] __change_page_attr_set_clr+0x905/0xaf7
[    0.442251]  RSP <ffff88000011fce0>
[    0.442772] ---[ end trace 3d6543145e4caae4 ]---
[    0.443446] Kernel panic - not syncing: Fatal exception





Thanks,
Ying Huang

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