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[Ming Lei <1548207@xxxxxxxxxxxxxxxxxx>]

When this commit c8d73ebfe19daac81b7cb5c8d1dd(module: clean up RO/NX handling)
is reverted, the issue disappeares.


So the above commit should be the cause.

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https://bugs.launchpad.net/bugs/1548207

Title:
  xenial 4.4.0-7-generic: kernel oops during load module

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  EFI stub: Booting Linux Kernel...
  EFI stub: Using DTB from configuration table
  EFI stub: Exiting boot services and installing virtual address map...
  L3c Cache: 8MB
  [    0.587986] kernel BUG at /build/linux-RKt9qy/linux-4.4.0/mm/memory.c:1887!
  [    0.594918] Internal error: Oops - BUG: 0 [#1] SMP
  [    0.599685] Modules linked in:
  [    0.602738] CPU: 7 PID: 164 Comm: systemd-udevd Not tainted 4.4.0-7-generic #22-Ubuntu
  [    0.610616] Hardware name: AppliedMicro Mustang/Mustang, BIOS 2.04.08-beta Feb  2 2016
  [    0.618493] task: ffff8007f95dcb00 ti: ffff8000fac44000 task.ti: ffff8000fac44000
  [    0.625941] PC is at apply_to_page_range+0x330/0x378
  [    0.630881] LR is at change_memory_common+0x94/0x148
  [    0.635819] pc : [<ffff8000001f8f20>] lr : [<ffff80000009a964>] pstate: 60000145
  [    0.643175] sp : ffff8000fac47b20
  [    0.646470] x29: ffff8000fac47b20 x28: 0000000000000000 
  [    0.651774] x27: ffff7ffffc00c000 x26: ffff7ffffc0067d0 
  [    0.657079] x25: ffff80000009aa18 x24: ffff7ffffc006780 
  [    0.662383] x23: ffff8000fac47c28 x22: ffff80000009a878 
  [    0.667686] x21: ffff800000d56000 x20: ffff7ffffc00c000 
  [    0.672990] x19: ffff7ffffc00c000 x18: ffff80000090f928 
  [    0.678293] x17: ffff8000fac479e8 x16: 40362c49a8665c46 
  [    0.683597] x15: ffffffffffffffff x14: ffff000000000000 
  [    0.688900] x13: ffffffffffffffff x12: 0000000000000010 
  [    0.694203] x11: 0000000000000018 x10: 0101010101010101 
  [    0.699506] x9 : fffffffffffffffb x8 : 7f7f7f7f7f7f7f7f 
  [    0.704810] x7 : 636e712cff646b61 x6 : 000000802e726f64 
  [    0.710113] x5 : 646f722e00000000 x4 : ffff8000fac47c28 
  [    0.715416] x3 : ffff80000009a878 x2 : 0000000000000000 
  [    0.720719] x1 : ffff7ffffc00c000 x0 : ffff80000009a964 
  [    0.726022] 
  [    0.727504] Process systemd-udevd (pid: 164, stack limit = 0xffff8000fac44020)
  [    0.734688] Stack: (0xffff8000fac47b20 to 0xffff8000fac48000)
  [    0.740404] 7b20: ffff8000fac47be0 ffff80000009a964 ffff7ffffc00c000 ffff7ffffc00c000
  [    0.748193] 7b40: ffff800000d56000 0008000000000000 0000000000000080 ffff7ffffc006780
  [    0.755982] 7b60: ffff80000009aa18 ffff7ffffc0067d0 ffff8000fac47df0 0000000000000000
  [    0.763770] 7b80: ffff8000fac47df0 0000000000000000 ffff800000f11800 ffff7ffffc005fff
  [    0.771559] 7ba0: ffff7ffffc00c000 ffff7ffffc005fff ffff7ffffc006000 ffff7ffffc006000
  [    0.779347] 7bc0: ffff800000e4c000 ffff800000000000 ffff7ffffc005fff ffff800000d93af0
  [    0.787136] 7be0: ffff8000fac47c40 ffff80000009aac8 ffff7ffffc00c000 0000000000000000
  [    0.794924] 7c00: ffff80000009aa98 ffff800000d56000 ffff800000d80000 ffff800000d56000
  [    0.802712] 7c20: ffff800000d80000 0000000000000080 0008000000000000 cb88537fdc8ba602
  [    0.810501] 7c40: ffff8000fac47c60 ffff800000146604 ffff7ffffc00c000 ffff7ffffc0067dc
  [    0.818289] 7c60: ffff8000fac47c90 ffff800000147344 ffff7ffffc006580 ffff80000009aa98
  [    0.826078] 7c80: ffff7ffffc006580 ffff80000009aa98 ffff8000fac47cb0 ffff8000001499cc
  [    0.833866] 7ca0: ffff7ffffc006598 ffff8000fac47e68 ffff8000fac47e30 ffff800000149ec8
  [    0.841655] 7cc0: ffff800000d56000 0000000000000000 0000000000000005 0000ffff84475948
  [    0.849443] 7ce0: 0000000080000000 0000000000000015 000000000000011d 0000000000000111
  [    0.857232] 7d00: ffff8000008d7000 ffff8000fac44000 ffff0000002d3000 ffff800000e35220
  [    0.865020] 7d20: ffff800000e354a0 ffff7ffffc00c000 ffff0000002e3dd8 ffff8000008e7f68
  [    0.872808] 7d40: 0000000000000072 ffff800000000064 ffff80000000006e 0000003f00000000
  [    0.880597] 7d60: ffff7ffffc00c000 0000000000000018 ffff8000fac47e30 ffff800000149e8c
  [    0.888385] 7d80: ffff800000d56000 0000000000000000 0000000000000005 0000ffff84475948
  [    0.896174] 7da0: 0000000000000000 0000000000000000 ffff7ffffc004028 ffff800000000019
  [    0.903962] 7dc0: 0000000000000000 ffff81a400000000 0000000000000000 0000000000000000
  [    0.911751] 7de0: 0000000000000000 0000000000000000 00006c656e72656b 0000000000000000
  [    0.919539] 7e00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
  [    0.927328] 7e20: 0000000000000000 cb88537fdc8ba602 0000fffff8415d90 ffff800000085c70
  [    0.935116] 7e40: 0000000000000000 00000000370b5810 ffffffffffffffff 0000ffff843008b4
  [    0.942905] 7e60: 000000000000011d ffff0000002d3000 0000000000010e58 ffff0000002e3598
  [    0.950693] 7e80: ffff0000002e3420 ffff0000002dda70 0000000000007000 0000000000009520
  [    0.958482] 7ea0: 0000000000000000 0000000100000000 0000002200000021 000000160000001b
  [    0.966270] 7ec0: 0000000000000012 cb88537fdc8ba602 0000000000000005 0000ffff84475948
  [    0.974059] 7ee0: 0000000000000000 0000000000000005 0000000000000000 0000000000000000
  [    0.981847] 7f00: 0000000000000000 0000000000000000 0000000000000111 fefefefefeff0110
  [    0.989635] 7f20: 00000000ffffffff 0000000000000007 0000000000000038 0000000000000800
  [    0.997424] 7f40: 656e72656b206f6b 0000ffff84382590 0000ffff84300890 0000ffff844881d0
  [    1.005212] 7f60: 0000fffff8415af0 00000000370b2bf0 00000000370b5810 0000ffff84475948
  [    1.013001] 7f80: 00000000370b2ba0 0000000000020000 00000000370a4420 0000000000020000
  [    1.020789] 7fa0: 0000000000000000 0000000000000000 0000000000000000 0000fffff8415d90
  [    1.028578] 7fc0: 0000ffff8446f3b0 0000fffff8415d90 0000ffff843008b4 0000000080000000
  [    1.036366] 7fe0: 0000000000000005 0000000000000111 0000000000000000 0000000000000000
  [    1.044154] Call trace:
  [    1.046587] [<ffff8000001f8f20>] apply_to_page_range+0x330/0x378
  [    1.052562] [<ffff80000009a964>] change_memory_common+0x94/0x148
  [    1.058537] [<ffff80000009aac8>] set_memory_ro+0x30/0x40
  [    1.063822] [<ffff800000146604>] frob_text.isra.17+0x44/0x68
  [    1.069451] [<ffff800000147344>] module_enable_ro+0x4c/0x68
  [    1.074994] [<ffff8000001499cc>] load_module+0x12a4/0x14c8
  [    1.080450] [<ffff800000149ec8>] SyS_finit_module+0xf0/0x128
  [    1.086080] [<ffff800000085c70>] el0_svc_naked+0x24/0x28
  [    1.091363] Code: 97fff8a0 35fffbe0 f9400300 17ffffce (d4210000) 
  [    1.097449] ---[ end trace f4460da3c7dcc2b2 ]---

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