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

[Dave Cheney]

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:

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1448811

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Dave Cheney (dave-cheney)]

HI Brad,

I don't have sudo permission on rugby, I cannot run this command. Can you ?

rugby(~) % apport-collect 1448811
You need to run 'sudo apt-get install python-apport' for apport-collect to work.

On Mon, Apr 27, 2015 at 10:30 AM, Brad Figg <email address hidden> wrote:
> This bug is missing log files that will aid in diagnosing the problem.
> >From a terminal window please run:
>
> apport-collect 1448811
>
> and then change the status of the bug to 'Confirmed'.
>
> If, due to the nature of the issue you have encountered, you are unable
> to run this command, please add a comment stating that fact and change
> the bug status to 'Confirmed'.
>
> This change has been made by an automated script, maintained by the
> Ubuntu Kernel Team.
>
> ** Changed in: linux (Ubuntu)
> Status: New => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> 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:...

[dann frazier (dannf)]

@Dave: Can you provide instructions on obtaining/executing runtest.exe so I can attempt to reproduce it on another system?

[Dave Cheney (dave-cheney)]

I can confirm that when upgraded to

Linux rugby 3.13.0-52-generic #86-Ubuntu SMP Mon May 4 04:34:50 UTC 2015 aarch64 aarch64 aarch64 GNU/Linux

The oops has gone away. I think this can be marked as closed/fixed.