lkml.org 
[lkml]   [2019]   [Jun]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v7 07/14] x86/cet/ibt: Add arch_prctl functions for IBT
On Thu, Jun 06, 2019 at 01:09:19PM -0700, Yu-cheng Yu wrote:

> +static int handle_bitmap(unsigned long arg2)
> +{
> + unsigned long addr, size;
> +
> + if (get_user(addr, (unsigned long __user *)arg2) ||
> + get_user(size, (unsigned long __user *)arg2 + 1))
> + return -EFAULT;
> +
> + return cet_setup_ibt_bitmap(addr, size);
> +}


> + /*
> + * Allocate legacy bitmap and return address & size to user.
> + */
> + case ARCH_X86_CET_SET_LEGACY_BITMAP:
> + return handle_bitmap(arg2);

AFAICT it does exactly the opposite of that comment; it gets the address
and size from userspace and doesn't allocate anything at all.

\
 
 \ /
  Last update: 2019-06-07 10:08    [W:0.153 / U:0.552 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site