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[Bug 1448811] [NEW] Internal error: Oops: 9600004f [#41] SMP leaks unkillable processes

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Public bug reported:

We have an arm64 xgene system running 14.04.1 which leaks processes when
the kernel oopses

[928109.838289] Unable to handle kernel paging request at virtual address 42083b48a0
[928109.845776] pgd = ffffffc00a50b000
[928109.849254] [42083b48a0] *pgd=000000420bb45003, *pmd=00000042dd0fb003, *pte=00a000407272ffd3
[928109.857788] Internal error: Oops: 9600004f [#42] SMP
[928109.862815] Modules linked in: 8021q garp stp mrp llc gpio_dwapb gpio_generic xgene_rng uio_pdrv_genirq uio ahci_xgene ahci_platform libahci xgene_enet
[928109.876569] CPU: 5 PID: 11728 Comm: runtest.exe Tainted: G      D       3.13.0-37-generic #64-Ubuntu
[928109.885743] task: ffffffc2b013ac00 ti: ffffffc001884000 task.ti: ffffffc001884000
[928109.893281] PC is at __hyp_text_end+0x2230/0x3180
[928109.898052] LR is at pipe_read+0x23c/0x4d4
[928109.902219] pc : [<ffffffc00060d230>] lr : [<ffffffc0001aea20>] pstate: 20000145
[928109.909672] sp : ffffffc001887cf0
[928109.913058] x29: ffffffc001887cf0 x28: ffffffc2c56a9000 
[928109.918451] x27: ffffffc001887dc8 x26: 0000000000001000 
[928109.923842] x25: ffffffc2c56a9000 x24: ffffffc001884000 
[928109.929244] x23: 0000000000000001 x22: ffffffc0006269d8 
[928109.934636] x21: ffffffc219e81cc0 x20: ffffffc001971518 
[928109.940029] x19: 0000000000000000 x18: 0000000000000000 
[928109.945420] x17: 00000000003ce8e0 x16: 000000000001f4b0 
[928109.950810] x15: 0000000000000000 x14: 65757274202c3130 
[928109.956205] x13: 3030303030306666 x12: 6666666666377830 
[928109.961599] x11: 202c313137323030 x10: 3030666666666666 
[928109.966993] x9 : 66377830202c6665 x8 : 3864666666663078 
[928109.972385] x7 : 302d202c30303030 x6 : 00000042083b48a0 
[928109.977778] x5 : 0000000000001000 x4 : 0000000000000000 
[928109.983174] x3 : 000000001d365e9f x2 : 0000000000001000 
[928109.988566] x1 : ffffffc2c56a9030 x0 : 0000000000001000 
[928109.993954] 
[928109.995527] Process runtest.exe (pid: 11728, stack limit = 0xffffffc001884058)
[928110.002800] Stack: (0xffffffc001887cf0 to 0xffffffc001888000)
[928110.008606] 7ce0:                                     01887da0 ffffffc0 001a5b50 ffffffc0
[928110.016829] 7d00: 01887dd8 ffffffc0 01887ec8 ffffffc0 01887ec8 ffffffc0 083b48c0 00000042
[928110.025051] 7d20: 60000000 00000000 00000015 00000000 00000112 00000000 0000003f 00000000
[928110.033275] 7d40: 008ec000 ffffffc0 01884000 ffffffc0 60000000 00000000 00001000 00000000
[928110.041499] 7d60: 19e81d38 ffffffc2 19e81ce8 ffffffc2 d695cc00 ffffffc3 01884000 00000007
[928110.049722] 7d80: 00000000 00000001 00009540 00000000 00001000 00000000 01887dc8 ffffffc0
[928110.057946] 7da0: 01887e30 ffffffc0 001a6110 ffffffc0 d695cc00 ffffffc3 01884000 ffffffc0
[928110.066170] 7dc0: 00000000 00000000 083b48c0 00000042 00009540 00000000 d695cc00 ffffffc3
[928110.074393] 7de0: 00000000 00000000 00000000 00000000 00000000 00000000 b013ac00 ffffffc2
[928110.082616] 7e00: 00000000 00000000 00000000 00000000 00009540 00000000 00000000 00000000
[928110.090840] 7e20: 00000000 00000000 00000000 00000000 01887e80 ffffffc0 001a6c04 ffffffc0
[928110.099064] 7e40: d695cc00 ffffffc3 083b48c0 00000042 00000001 00000000 001467d8 00000000
[928110.107287] 7e60: 60000000 00000000 00000015 00000000 d695cc00 ffffffc3 00000000 00000000
[928110.115509] 7e80: 00000000 00000000 000849ec ffffffc0 00000000 00000000 00000000 00000000
[928110.123730] 7ea0: ffffffff ffffffff 000849ec ffffffc0 00000000 00000000 00009540 00000000
[928110.131951] 7ec0: 000e2920 00000000 00000000 00000000 00000010 00000000 083b48c0 00000042
[928110.140172] 7ee0: 00009540 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[928110.148394] 7f00: 00009540 00000000 0802a4e8 00000042 0000003f 00000000 00053a08 00000000
[928110.156618] 7f20: 0801a000 00000042 00324160 00000000 00324160 00000000 00000010 00000000
[928110.164841] 7f40: 0a3f13d0 00000000 0000000a 00000000 0004f570 00000000 00277ff0 00000000
[928110.173071] 7f60: 00000000 00000000 00000000 00000000 00000000 00000000 08119490 00000042
[928110.181302] 7f80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[928110.189527] 7fa0: 00000000 00000000 00324508 00000000 080bbcc0 00000042 00000000 00000000
[928110.197756] 7fc0: 001467b8 00000000 08312c40 00000042 001467d8 00000000 60000000 00000000
[928110.205982] 7fe0: 00000010 00000000 0000003f 00000000 00000000 00000000 00000000 00000000
[928110.214204] Call trace:
[928110.216736] [<ffffffc00060d230>] __hyp_text_end+0x2230/0x3180
[928110.222544] [<ffffffc0001a5b4c>] do_sync_read+0x64/0xa0
[928110.227832] [<ffffffc0001a610c>] vfs_read+0x8c/0x188
[928110.232868] [<ffffffc0001a6c00>] SyS_read+0x40/0x90
[928110.237814] Code: 14000003 aa0203e0 d10040c6 aa0003e2 (380014df) 
[928110.244003] ---[ end trace 499d849ab635d6dc ]---

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-37-generic 3.13.0-37.64
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
Uname: Linux 3.13.0-37-generic aarch64
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: arm64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: Error: [Errno 2] No such file or directory: 'iw'
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Mon Apr 27 00:22:34 2015
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
Lspci:
 
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
PciMultimedia:
 
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:
 
ProcKernelCmdLine: console=ttyS0,115200n8 ro
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: apport-bug arm64 trusty

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https://bugs.launchpad.net/bugs/1448811

Title:
  Internal error: Oops: 9600004f [#41] SMP leaks unkillable processes

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  We have an arm64 xgene system running 14.04.1 which leaks processes
  when the kernel oopses

  [928109.838289] Unable to handle kernel paging request at virtual address 42083b48a0
  [928109.845776] pgd = ffffffc00a50b000
  [928109.849254] [42083b48a0] *pgd=000000420bb45003, *pmd=00000042dd0fb003, *pte=00a000407272ffd3
  [928109.857788] Internal error: Oops: 9600004f [#42] SMP
  [928109.862815] Modules linked in: 8021q garp stp mrp llc gpio_dwapb gpio_generic xgene_rng uio_pdrv_genirq uio ahci_xgene ahci_platform libahci xgene_enet
  [928109.876569] CPU: 5 PID: 11728 Comm: runtest.exe Tainted: G      D       3.13.0-37-generic #64-Ubuntu
  [928109.885743] task: ffffffc2b013ac00 ti: ffffffc001884000 task.ti: ffffffc001884000
  [928109.893281] PC is at __hyp_text_end+0x2230/0x3180
  [928109.898052] LR is at pipe_read+0x23c/0x4d4
  [928109.902219] pc : [<ffffffc00060d230>] lr : [<ffffffc0001aea20>] pstate: 20000145
  [928109.909672] sp : ffffffc001887cf0
  [928109.913058] x29: ffffffc001887cf0 x28: ffffffc2c56a9000 
  [928109.918451] x27: ffffffc001887dc8 x26: 0000000000001000 
  [928109.923842] x25: ffffffc2c56a9000 x24: ffffffc001884000 
  [928109.929244] x23: 0000000000000001 x22: ffffffc0006269d8 
  [928109.934636] x21: ffffffc219e81cc0 x20: ffffffc001971518 
  [928109.940029] x19: 0000000000000000 x18: 0000000000000000 
  [928109.945420] x17: 00000000003ce8e0 x16: 000000000001f4b0 
  [928109.950810] x15: 0000000000000000 x14: 65757274202c3130 
  [928109.956205] x13: 3030303030306666 x12: 6666666666377830 
  [928109.961599] x11: 202c313137323030 x10: 3030666666666666 
  [928109.966993] x9 : 66377830202c6665 x8 : 3864666666663078 
  [928109.972385] x7 : 302d202c30303030 x6 : 00000042083b48a0 
  [928109.977778] x5 : 0000000000001000 x4 : 0000000000000000 
  [928109.983174] x3 : 000000001d365e9f x2 : 0000000000001000 
  [928109.988566] x1 : ffffffc2c56a9030 x0 : 0000000000001000 
  [928109.993954] 
  [928109.995527] Process runtest.exe (pid: 11728, stack limit = 0xffffffc001884058)
  [928110.002800] Stack: (0xffffffc001887cf0 to 0xffffffc001888000)
  [928110.008606] 7ce0:                                     01887da0 ffffffc0 001a5b50 ffffffc0
  [928110.016829] 7d00: 01887dd8 ffffffc0 01887ec8 ffffffc0 01887ec8 ffffffc0 083b48c0 00000042
  [928110.025051] 7d20: 60000000 00000000 00000015 00000000 00000112 00000000 0000003f 00000000
  [928110.033275] 7d40: 008ec000 ffffffc0 01884000 ffffffc0 60000000 00000000 00001000 00000000
  [928110.041499] 7d60: 19e81d38 ffffffc2 19e81ce8 ffffffc2 d695cc00 ffffffc3 01884000 00000007
  [928110.049722] 7d80: 00000000 00000001 00009540 00000000 00001000 00000000 01887dc8 ffffffc0
  [928110.057946] 7da0: 01887e30 ffffffc0 001a6110 ffffffc0 d695cc00 ffffffc3 01884000 ffffffc0
  [928110.066170] 7dc0: 00000000 00000000 083b48c0 00000042 00009540 00000000 d695cc00 ffffffc3
  [928110.074393] 7de0: 00000000 00000000 00000000 00000000 00000000 00000000 b013ac00 ffffffc2
  [928110.082616] 7e00: 00000000 00000000 00000000 00000000 00009540 00000000 00000000 00000000
  [928110.090840] 7e20: 00000000 00000000 00000000 00000000 01887e80 ffffffc0 001a6c04 ffffffc0
  [928110.099064] 7e40: d695cc00 ffffffc3 083b48c0 00000042 00000001 00000000 001467d8 00000000
  [928110.107287] 7e60: 60000000 00000000 00000015 00000000 d695cc00 ffffffc3 00000000 00000000
  [928110.115509] 7e80: 00000000 00000000 000849ec ffffffc0 00000000 00000000 00000000 00000000
  [928110.123730] 7ea0: ffffffff ffffffff 000849ec ffffffc0 00000000 00000000 00009540 00000000
  [928110.131951] 7ec0: 000e2920 00000000 00000000 00000000 00000010 00000000 083b48c0 00000042
  [928110.140172] 7ee0: 00009540 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  [928110.148394] 7f00: 00009540 00000000 0802a4e8 00000042 0000003f 00000000 00053a08 00000000
  [928110.156618] 7f20: 0801a000 00000042 00324160 00000000 00324160 00000000 00000010 00000000
  [928110.164841] 7f40: 0a3f13d0 00000000 0000000a 00000000 0004f570 00000000 00277ff0 00000000
  [928110.173071] 7f60: 00000000 00000000 00000000 00000000 00000000 00000000 08119490 00000042
  [928110.181302] 7f80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  [928110.189527] 7fa0: 00000000 00000000 00324508 00000000 080bbcc0 00000042 00000000 00000000
  [928110.197756] 7fc0: 001467b8 00000000 08312c40 00000042 001467d8 00000000 60000000 00000000
  [928110.205982] 7fe0: 00000010 00000000 0000003f 00000000 00000000 00000000 00000000 00000000
  [928110.214204] Call trace:
  [928110.216736] [<ffffffc00060d230>] __hyp_text_end+0x2230/0x3180
  [928110.222544] [<ffffffc0001a5b4c>] do_sync_read+0x64/0xa0
  [928110.227832] [<ffffffc0001a610c>] vfs_read+0x8c/0x188
  [928110.232868] [<ffffffc0001a6c00>] SyS_read+0x40/0x90
  [928110.237814] Code: 14000003 aa0203e0 d10040c6 aa0003e2 (380014df) 
  [928110.244003] ---[ end trace 499d849ab635d6dc ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-37-generic 3.13.0-37.64
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic aarch64
  AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access /dev/snd/: No such file or directory
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: arm64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
  Date: Mon Apr 27 00:22:34 2015
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  Lspci:
   
  Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
  PciMultimedia:
   
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: console=ttyS0,115200n8 ro
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:

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