Re: kmemleak splat on copy_process()

From	Andy Lutomirski <luto@amacapital.net>
Newsgroups	linux.kernel
Subject	Re: kmemleak splat on copy_process()
Date	2017-02-17 20:40 +0100
Message-ID	<tbWxP-8rv-7@gated-at.bofh.it> (permalink)
References	(2 earlier) <t82Vc-4qF-11@gated-at.bofh.it> <t890B-gF-13@gated-at.bofh.it> <t8LSh-7Ue-13@gated-at.bofh.it> <tbUcH-76j-27@gated-at.bofh.it> <tbUw1-7dc-9@gated-at.bofh.it>
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On Fri, Feb 17, 2017 at 9:23 AM, Luis R. Rodriguez <mcgrof@kernel.org> wrote:
> On Fri, Feb 17, 2017 at 9:07 AM, Andy Lutomirski <luto@amacapital.net> wrote:
>> But maybe
>> there really is a race in which a kmemleak check right in the middle
>> of duplicating the task struct really can't see the stack pointer.
>
> Funny, but it was actually using kmemleak how I can easily reproduce:
>
> To reproduce the kmemleak splat:
>
> echo clear >  /sys/kernel/debug/kmemleak
> echo scan >  /sys/kernel/debug/kmemleak
> cat /sys/kernel/debug/kmemleak

Worked fine for me.  Maybe your config is special?

--Andy

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Re: kmemleak splat on copy_process() Andy Lutomirski <luto@amacapital.net> - 2017-02-17 18:10 +0100
  Re: kmemleak splat on copy_process() "Luis R. Rodriguez" <mcgrof@kernel.org> - 2017-02-17 18:30 +0100
    Re: kmemleak splat on copy_process() Andy Lutomirski <luto@amacapital.net> - 2017-02-17 20:40 +0100

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