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[Launchpad Bug Tracker <1378856@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.16.0-23.30

---------------
linux (3.16.0-23.30) utopic; urgency=low

  [ Andy Whitcroft ]

  * Release Tracking Bug
    - LP: #1381927
  * [Config] CONFIG_DRM_BOCHS=n
    - LP: #1378648

  [ Paolo Pisati ]

  * [Config] armhf: disable JUMP_LABEL
    - LP: #1378856
 -- Andy Whitcroft <apw@xxxxxxxxxxxxx>   Thu, 16 Oct 2014 10:09:49 +0200

** Changed in: linux (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1378856

Title:
  [highbank] Oops on boot loading bridge module

Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  SRU Justification:

  Impact: oops upon loading of some modules that incur in the JUMP_LABEL
  optimization.

  Fix: disable JUMP_LABEL until patches that make the DEBUG_SET_NORX
  text section protection can cope with the rewriting.

  Testcase: boot an armhf board, create a bridge

  brctl addbr lxcbr0

  and watch for an oops or not.

  ===

  
  [   16.845971] Unable to handle kernel paging request at virtual address bf2c6a88
  [   16.853224] pgd = e76f15c0
  [   16.856108] [bf2c6a88] *pgd=2777a003, *pmd=2babb003, *pte=8000002753879f
  [   16.862870] Internal error: Oops: a0f [#1] SMP ARM
  [   16.867656] Modules linked in: bridge(+) stp llc iptable_filter ip_tables x_tables ib_iser[   16.867695] CPU: 0 PID: 1126 Comm: modprobe Not tainted 3.16.0-21-generic-lpae #28-Ubuntu
  [   16.867698] task: ec891a00 ti: e76a6000 task.ti: e76a6000
  [   16.867705] PC is at patch_text+0x4/0x10
  [   16.867713] LR is at __jump_label_update+0x64/0x6c
  [   16.867716] pc : [<c0a20494>]    lr : [<c0434ffc>]    psr: 80070013
  [   16.867716] sp : e76a7d78  ip : 00019d80  fp : bf2d0888
  [   16.867718] r10: 00000000  r9 : bf2d8000  r8 : 00000000
  [   16.867721] r7 : 00000001  r6 : c0f50458  r5 : bf2d0794  r4 : bf2d06f8
  [   16.867723] r3 : bf2c6a88  r2 : ea000000  r1 : ea000007  r0 : bf2c6a88
  [   16.867727] Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
  [   16.867730] Control: 30c5387d  Table: 276f15c0  DAC: fffffffd
  [   16.867732] Process modprobe (pid: 1126, stack limit = 0xe76a6250)
  [   16.867734] Stack: (0xe76a7d78 to 0xe76a8000)
  [   16.867737] 7d60:                                                       e7608040 c0f50458
  [   16.867741] 7d80: 00000001 00000000 00000000 c0435054 c0f50458 00000001 00000007 c0e04920
  [   16.867744] 7da0: bf2d0600 c043517c bf2d0600 bf2d0620 00000007 c095c62c 00000000 c095c70c
  [   16.867747] 7dc0: bf2d0a24 c0dff554 c0e04920 c0e04920 e7608b80 bf2d81a0 bf2d0a24 c092661c
  [   16.867751] 7de0: 00000000 00000000 c0dff554 bf2d8050 e76a6038 c0309740 00000001 c04836e4
  [   16.867754] 7e00: e9ce6c40 00000000 e76b8080 8040003f 00000001 c043d60c e9ce6c20 00000000
  [   16.867757] 7e20: 00000000 8040003f 00000000 80150014 00000000 c043f530 00000001 00000000
  [   16.867760] 7e40: 00000cab 8040003f e76b8080 f0c11000 00000001 bd94282a e76a7f58 00000000
  [   16.867763] 7e60: bf2d0894 e76a6000 c0dff554 00000000 e76a7f58 00000000 bf2d0888 c03d55c4
  [   16.867767] 7e80: ffff8000 00007fff c03d2374 ebad4188 b860d1c0 bf2d0894 0000040c bf2d1000
  [   16.867770] 7ea0: bf2d0894 ffffffff 00000000 b6fef398 c0dff554 00000000 e76a7f5c c049ef68
  [   16.867773] 7ec0: bf2cd024 00000001 bf2cd02c 00000002 00000000 00000000 00000000 00000000
  [   16.867776] 7ee0: 00000000 00000000 6e72656b 00006c65 00000000 00000000 00000000 00000000
  [   16.867779] 7f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  [   16.867783] 7f20: 00000000 bd94282a 00000120 00000000 00000000 b6fef398 0000017b c0320ec4
  [   16.867786] 7f40: e76a6000 00000000 b860d1c0 c03d5b90 00181088 00000000 f0c11000 0002391c
  [   16.867789] 7f60: f0c33fe4 f0c27059 f0c2b378 00014000 00017190 bf2d0798 0000000a 00000001
  [   16.867793] 7f80: 00000039 0000003a 0000002e 00000032 0000001a 00000000 b6ff0608 b6ff0e18
  [   16.867796] 7fa0: b6ff0990 c0320d20 b6ff0608 b6ff0e18 00000000 b6fef398 00000000 b6ff0968
  [   16.867799] 7fc0: b6ff0608 b6ff0e18 b6ff0990 0000017b b8615288 00000000 00000000 b860d1c0
  [   16.867803] 7fe0: bef98a38 bef98a28 b6fe6177 b6f5b2b2 40010030 00000000 705f646e 696c6275
  [   16.867812] [<c0a20494>] (patch_text) from [<c0434ffc>] (__jump_label_update+0x64/0x6c)
  [   16.867819] [<c0434ffc>] (__jump_label_update) from [<c0435054>] (jump_label_update+0x50/0x9c)
  [   16.867826] [<c0435054>] (jump_label_update) from [<c043517c>] (static_key_slow_inc+0xdc/0xe0)
  [   16.867835] [<c043517c>] (static_key_slow_inc) from [<c095c62c>] (nf_register_hook+0xc0/0xcc)
  [   16.867842] [<c095c62c>] (nf_register_hook) from [<c095c70c>] (nf_register_hooks+0x38/0x78)
  [   16.867861] [<c095c70c>] (nf_register_hooks) from [<bf2d81a0>] (br_netfilter_init+0x38/0xe98 [bridge])
  [   16.867895] [<bf2d81a0>] (br_netfilter_init [bridge]) from [<bf2d8050>] (br_init+0x50/0xd0 [bridge])
  [   16.867911] [<bf2d8050>] (br_init [bridge]) from [<c0309740>] (do_one_initcall+0xdc/0x20c)

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