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From: Andreas Schwab <schwab@suse.de>
To: Andrew Senkevich <andrew.n.senkevich@gmail.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>,  libc-alpha <libc-alpha@sourceware.org>,  Max Horn <max@quendi.de>,  thomas@grindinggear.com
Subject: Re: [PATCH] Fix i386 memmove issue [BZ #22644]
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Date: Mon, 19 Mar 2018 13:11:00 -0000
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	(Andrew Senkevich's message of "Mon, 19 Mar 2018 13:45:43 +0100")
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On Mär 19 2018, Andrew Senkevich <andrew.n.senkevich@gmail.com> wrote:

> +static void
> +do_test2 (void)
> +{
> +  uint32_t num = 0x20000000;
> +  uint32_t * large_buf;
> +
> +  large_buf = mmap ((void*)0x70000000, num, PROT_READ | PROT_WRITE,
> +     MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0);

Since you are using MAP_FIXED this may overwrite an existing mapping.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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