lkml.org 
[lkml]   [2020]   [Apr]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [RFC PATCH] powerpc/spufs: fix copy_to_user while atomic
On Tue, Apr 28, 2020 at 2:05 PM Jeremy Kerr <jk@ozlabs.org> wrote:
>
> Currently, we may perform a copy_to_user (through
> simple_read_from_buffer()) while holding a context's register_lock,
> while accessing the context save area.
>
> This change uses a temporary buffers for the context save area data,
> which we then pass to simple_read_from_buffer.
>
> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
> ---

Thanks for fixing this!

I wonder how far it should be backported, given that this has been broken for
14 years now.

Fixes: bf1ab978be23 ("[POWERPC] coredump: Add SPU elf notes to coredump.")
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

\
 
 \ /
  Last update: 2020-04-28 18:01    [W:0.120 / U:0.032 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site