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Date:   Fri, 17 Feb 2017 11:32:34 -0800
From:   Andy Lutomirski <>
To:     "Luis R. Rodriguez" <>
Cc:     Michal Hocko <>,
        Andrew Morton <>,
        Ingo Molnar <>,
        Andy Lutomirski <>,
        Kees Cook <>,
        "Eric W. Biederman" <>,
        Mateusz Guzik <>,
        "" <>
Subject: Re: kmemleak splat on copy_process()

On Fri, Feb 17, 2017 at 9:23 AM, Luis R. Rodriguez <> wrote:
> On Fri, Feb 17, 2017 at 9:07 AM, Andy Lutomirski <> 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?


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