linux-kernel - Re: [PATCH] mm: optionally disable brk()

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Message-ID: <653873ef-2a57-37e0-1ac3-fba763652b35@redhat.com>
Date:   Fri, 2 Oct 2020 19:52:19 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Topi Miettinen <toiwoton@...il.com>, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: optionally disable brk()

On 02.10.20 19:19, Topi Miettinen wrote:
> The brk() system call allows to change data segment size (heap). This
> is mainly used by glibc for memory allocation, but it can use mmap()
> and that results in more randomized memory mappings since the heap is
> always located at fixed offset to program while mmap()ed memory is
> randomized.

Want to take more Unix out of Linux?

Honestly, why care about disabling? User space can happily use mmap() if
it prefers.


-- 
Thanks,

David / dhildenb