FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-pkeys.git pkeys-v008
commit 6f8685f4731b4e391d9326ee3fc1bfa3eb764adf ("mm: simplify __get_user_pages()")


+------------------------------------------------+------------+------------+
|                                                | c30768730a | 6f8685f473 |
+------------------------------------------------+------------+------------+
| boot_successes                                 | 94         | 0          |
| boot_failures                                  | 4          | 54         |
| IP-Config:Auto-configuration_of_network_failed | 4          |            |
| kernel_BUG_at_mm/gup.c                         | 0          | 54         |
| invalid_opcode:#[##]SMP                        | 0          | 54         |
| EIP_is_at_get_user_pages                       | 0          | 54         |
| Kernel_panic-not_syncing:Fatal_exception       | 0          | 54         |
| backtrace:do_execve                            | 0          | 8          |
| backtrace:run_init_process                     | 0          | 8          |
| backtrace:call_usermodehelper_exec_async       | 0          | 46         |
+------------------------------------------------+------------+------------+


[   12.989809] Write protecting the kernel text: 10048k
[   12.991339] Write protecting the kernel read-only data: 4092k
[   12.992761] ------------[ cut here ]------------
[   12.993990] kernel BUG at mm/gup.c:648!
[   12.995318] invalid opcode: 0000 [#1] SMP 
[   12.996554] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.3.0-09276-g6f8685f #1338
[   12.998179] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[   13.007206] task: d44b0000 ti: d44ac000 task.ti: d44ac000
[   13.008736] EIP: 0060:[<c10b7992>] EFLAGS: 00010246 CPU: 0
[   13.010299] EIP is at get_user_pages+0x6c/0xee
[   13.011718] EAX: 00000001 EBX: 00000000 ECX: d44adf3c EDX: 00000000
[   13.013407] ESI: 00000017 EDI: d44adf3c EBP: d44adef0 ESP: d44aded0
[   13.015114]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[   13.016742] CR0: 80050033 CR2: c19d5fec CR3: 01f63000 CR4: 00040690
[   13.031489] Stack:
[   13.032652]  d5d62038 d44b0000 bffffff6 d5d62000 00000000 00000ff6 00000000 d5d21e00
[   13.034587]  d44adf4c c10dc0f9 00000001 00000001 00000001 d44adf3c 00000000 d5d21eb0
[   13.036539]  00000ff6 d44b0000 00000000 d5cd6010 00000000 00000000 d44b0000 00000001
[   13.051646] Call Trace:
[   13.052968]  [<c10dc0f9>] copy_strings+0x12c/0x23f
[   13.054523]  [<c10dc4ab>] copy_strings_kernel+0x21/0x2b
[   13.056125]  [<c10dd616>] do_execveat_common+0x344/0x4ee
[   13.057761]  [<c10dd7d4>] do_execve+0x14/0x16
[   13.059291]  [<c1000384>] run_init_process+0x1c/0x1e
[   13.060890]  [<c19c6fa4>] kernel_init+0x34/0xb5
[   13.062461]  [<c19cdd11>] ret_from_kernel_thread+0x21/0x40
[   13.073448]  [<c19c6f70>] ? rest_init+0x72/0x72
[   13.075273] Code: 55 ec 8b 4d e8 50 8b 45 e4 ff 75 18 57 56 ff 75 08 e8 fc fc ff ff 8b 55 f0 83 c4 14 85 d2 75 0d 85 c0 79 02 0f 0b 39 45 08 77 02 <0f> 0b 85 ff 74 70 85 c0 7e 07 01 c3 29 45 08 74 67 85 d2 75 42
[   13.080967] EIP: [<c10b7992>] get_user_pages+0x6c/0xee SS:ESP 0068:d44aded0
[   13.083049] ---[ end trace 4cd3e2eb20b11012 ]---
[   13.084836] Kernel panic - not syncing: Fatal exception


Thanks,
Ying Huang