lkml.org 
[lkml]   [2018]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v8 0/8] arm64: untag user pointers passed to the kernel
On Thu, Nov 8, 2018 at 3:36 PM, Andrey Konovalov <andreyknvl@google.com> wrote:

[...]

> Changes in v8:
> - Rebased onto 65102238 (4.20-rc1).
> - Added a note to the cover letter on why syscall wrappers/shims that untag
> user pointers won't work.
> - Added a note to the cover letter that this patchset has been merged into
> the Pixel 2 kernel tree.
> - Documentation fixes, in particular added a list of syscalls that don't
> support tagged user pointers.

Hi Catalin,

I've changed the documentation to be more specific, please take a look.

I haven't done anything about adding a way for the user to find out
that the kernel supports this ABI extension. I don't know what would
the the preferred way to do this, and we haven't received any comments
on that from anybody else. Probing "on some innocuous syscall
currently returning -EFAULT on tagged pointer arguments" works though,
as you mentioned.

As mentioned in the cover letter, this patchset has been merged into
the Pixel 2 kernel tree.

Thanks!

\
 
 \ /
  Last update: 2018-11-08 15:49    [W:0.090 / U:4.728 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site