linux-kernel - Re: incoming

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Message-ID: <202109101312.C145D4F@keescook>
Date:   Fri, 10 Sep 2021 13:13:29 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        mm-commits@...r.kernel.org
Subject: Re: incoming

On Fri, Sep 10, 2021 at 10:11:53AM -0700, Kees Cook wrote:
> On Thu, Sep 09, 2021 at 08:09:48PM -0700, Andrew Morton wrote:
> > 
> > More post linux-next material.
> > 
> > 9 patches, based on f154c806676ad7153c6e161f30c53a44855329d6.
> > 
> > Subsystems affected by this patch series:
> > 
> >   mm/slab-generic
> >   rapidio
> >   mm/debug
> > 
> > Subsystem: mm/slab-generic
> > 
> >     "Matthew Wilcox (Oracle)" <willy@...radead.org>:
> >       mm: move kvmalloc-related functions to slab.h
> > 
> > Subsystem: rapidio
> > 
> >     Kees Cook <keescook@...omium.org>:
> >       rapidio: avoid bogus __alloc_size warning
> > 
> > Subsystem: mm/debug
> > 
> >     Kees Cook <keescook@...omium.org>:
> >     Patch series "Add __alloc_size() for better bounds checking", v2:
> >       Compiler Attributes: add __alloc_size() for better bounds checking
> >       checkpatch: add __alloc_size() to known $Attribute
> >       slab: clean up function declarations
> >       slab: add __alloc_size attributes for better bounds checking
> >       mm/page_alloc: add __alloc_size attributes for better bounds checking
> >       percpu: add __alloc_size attributes for better bounds checking
> >       mm/vmalloc: add __alloc_size attributes for better bounds checking
> 
> Hi,
> 
> FYI, in overnight build testing I found yet another corner case in
> GCC's handling of the __alloc_size attribute. It's the gift that keeps
> on giving. The fix is here:
> 
> https://lore.kernel.org/lkml/20210910165851.3296624-1-keescook@chromium.org/

I'm so glad it's Friday. Here's the v2 fix... *sigh*

https://lore.kernel.org/lkml/20210910201132.3809437-1-keescook@chromium.org/

-Kees

> 
> > 
> >  Makefile                                 |   15 +++
> >  drivers/of/kexec.c                       |    1 
> >  drivers/rapidio/devices/rio_mport_cdev.c |    9 +-
> >  include/linux/compiler_attributes.h      |    6 +
> >  include/linux/gfp.h                      |    2 
> >  include/linux/mm.h                       |   34 --------
> >  include/linux/percpu.h                   |    3 
> >  include/linux/slab.h                     |  122 ++++++++++++++++++++++---------
> >  include/linux/vmalloc.h                  |   11 ++
> >  scripts/checkpatch.pl                    |    3 
> >  10 files changed, 132 insertions(+), 74 deletions(-)
> > 
> 
> -- 
> Kees Cook

-- 
Kees Cook