[Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-11-13 Thread Launchpad Bug Tracker 
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
   Status: Incomplete => Expired

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Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  Expired

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

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Re: [Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-09-14 Thread Ming Lei 
On Tue, Sep 1, 2015 at 11:27 PM, dann frazier
 wrote:
> Sorry, I missed the request for more information. I retested yesterday,
> and it is still possible to crash the system with the above stress-ng
> command 4.2.0-6.6 from ppa:canonical-kernel-team/ppa. In fact, it seems
> to be 100% reproducible in just seconds. I'm no longer seeing the NULL
> pointer dereference - or any additional information on the console - but
> that could just be that the console is running too slow. The system no
> longer responds to pings - so I don't believe it is just overloaded.

I can't trigger that on mustang/merlin.

And looks the kernel won't crash too when I run one 4.2 upstream kernel.

But on wily, stress-ng often causes itself translation fault, see the report
below:

https://bugs.launchpad.net/ubuntu/+source/stress-ng/+bug/1495761

Thanks,


>
> --
> You received this bug notification because you are subscribed to linux
> in Ubuntu.
> https://bugs.launchpad.net/bugs/1469859
>
> Title:
>   HP ProLiant m400: NULL pointer dereference PC is at
>   ctx_sched_in+0xdc/0x30c
>
> Status in linux package in Ubuntu:
>   Incomplete
>
> Bug description:
>   [Impact]
>   A heavily loaded system can lead to a kernel crash.
>
>   [Test Case]
>   while :; do stress-ng --all 64 -t 600 -v; done
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469859/+subscriptions

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https://bugs.launchpad.net/bugs/1469859

Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469859/+subscriptions

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[Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-09-01 Thread dann frazier 
** Changed in: linux (Ubuntu)
   Status: Expired => New

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https://bugs.launchpad.net/bugs/1469859

Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  New

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-09-01 Thread dann frazier 
Sorry, I missed the request for more information. I retested yesterday,
and it is still possible to crash the system with the above stress-ng
command 4.2.0-6.6 from ppa:canonical-kernel-team/ppa. In fact, it seems
to be 100% reproducible in just seconds. I'm no longer seeing the NULL
pointer dereference - or any additional information on the console - but
that could just be that the console is running too slow. The system no
longer responds to pings - so I don't believe it is just overloaded.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1469859

Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469859/+subscriptions

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[Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-08-30 Thread Launchpad Bug Tracker 
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
   Status: Incomplete = Expired

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1469859

Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  Expired

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469859/+subscriptions

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[Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-07-01 Thread Ming Lei 
** Changed in: linux (Ubuntu)
   Status: Triaged = Incomplete

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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1469859

Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469859/+subscriptions

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[Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-07-01 Thread Ming Lei 
Given 'stress-ng --all 64' is  quite heavy and system-wide stress, and 
thousands of tasks are created for
running lots of stress concurrently which may touch most areas of kernel,  the 
triggered issue is quite difficult
to reproduce, so please add the detailed log information for further 
invesitigating in the following report,
otherwise it isn't helpful for the invesitigation.

Thanks,

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1469859

Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  Triaged

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469859/+subscriptions

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[Kernel-packages] [Bug 1469859] Re: HP ProLiant m400: NULL pointer dereference PC is at ctx_sched_in+0xdc/0x30c

2015-06-30 Thread Joseph Salisbury 
** Changed in: linux (Ubuntu)
   Importance: Undecided = High

** Changed in: linux (Ubuntu)
   Status: Incomplete = Triaged

** Tags added: kernel-da-key

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1469859

Title:
  HP ProLiant m400: NULL pointer dereference PC is at
  ctx_sched_in+0xdc/0x30c

Status in linux package in Ubuntu:
  Triaged

Bug description:
  [Impact]
  A heavily loaded system can lead to a kernel crash.

  [Test Case]
  while :; do stress-ng --all 64 -t 600 -v; done

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469859/+subscriptions

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