Re: [4.11 Regression] 64-bit process gets AT_BASE in the first 4 GB if exec'ed from 32-bit process

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2018-05-17 21:46 GMT+01:00 Andy Lutomirski <luto@xxxxxxxxxx>:
> On Thu, May 17, 2018 at 1:25 PM Alexey Izbyshev <izbyshev@xxxxxxxxx> wrote:
>
>> Hello everyone,
>
>> I've discovered the following strange behavior of a 4.15.13-based kernel
>> (bisected to
>
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b028f784e8c341e762c264f70dc0ca1418c8b7a
>> between 4.11-rc2 and -rc3 thanks to Alexander Monakov).
>
>
> It's definitely not intended.  Can you confirm that the problem still
> exists in 4.16?  I have some vague recollection that this was a known issue
> that got fixed, and we could plausibly just be missing a backport.

I'm looking into that ATM, the problem like that was fixed with
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ada26481dfe6

Will check what's happening there.

Thanks,
             Dmitry




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