[PATCH] Fix i386 memmove issue [BZ #22644]

[Andreas Schwab]

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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