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Re: mips qemu test failures in -next due to "kthread: Fix use-after-free if kthread fork fails"

From Vegard Nossum <vegard.nossum@oracle.com>
Newsgroups linux.kernel
Subject Re: mips qemu test failures in -next due to "kthread: Fix use-after-free if kthread fork fails"
Date 2017-05-28 13:50 +0200
Message-ID <tM4RP-1pY-1@gated-at.bofh.it> (permalink)
References <tLOal-7br-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 05/27/17 19:56, Guenter Roeck wrote:
> Hi,
> 
> my qemu testis of mips images are failing in -next. Symptom is a hang during
> boot; see http://kerneltests.org/builders/qemu-mips-next for some examples.
> 
> I bisected the problem in next-20170526. It points to commit 4d6501dce079c
> ("kthread: Fix use-after-free if kthread fork fails"). Reverting that patch
> fixes the problem.
> 
> Bisect log is attached.

Hi,

Thanks for the report and sorry for the breakage :-/

I can't immediately spot what's going wrong, but I am able to reproduce
it on mips so I will try to debug.

Are you sure it's this commit, though? I checked out linus/master and
I get a boot hang even after reverting it.


Vegard

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Thread

mips qemu test failures in -next due to "kthread: Fix use-after-free  if kthread fork fails" Guenter Roeck <linux@roeck-us.net> - 2017-05-27 20:00 +0200
  Re: mips qemu test failures in -next due to "kthread: Fix  use-after-free if kthread fork fails" Vegard Nossum <vegard.nossum@oracle.com> - 2017-05-28 13:50 +0200
    Re: mips qemu test failures in -next due to "kthread: Fix  use-after-free if kthread fork fails" Guenter Roeck <linux@roeck-us.net> - 2017-05-28 16:50 +0200
    Re: mips qemu test failures in -next due to "kthread: Fix  use-after-free if kthread fork fails" Vegard Nossum <vegard.nossum@oracle.com> - 2017-05-28 17:00 +0200
      Re: mips qemu test failures in -next due to "kthread: Fix  use-after-free if kthread fork fails" Guenter Roeck <linux@roeck-us.net> - 2017-05-28 17:10 +0200
      Re: mips qemu test failures in -next due to "kthread: Fix  use-after-free if kthread fork fails" Guenter Roeck <linux@roeck-us.net> - 2017-05-28 17:30 +0200

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