From: Kees Cook <keescook@chromium.org>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, stable <stable@vger.kernel.org>,
Daniel Micay <danielmicay@gmail.com>,
Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Nathan Chancellor <nathan@kernel.org>,
linux-mm@kvack.org, llvm@lists.linux.dev
Subject: Re: [PATCH] slab: remove __alloc_size attribute from __kmalloc_track_caller
Date: Sat, 19 Feb 2022 15:58:51 -0800 [thread overview]
Message-ID: <202202191558.11C173F04@keescook> (raw)
In-Reply-To: <CAKwvOd=4uwMVBwYU8XPP+cHkw5V1S_t7i8psMTRySsKEcDVZ_A@mail.gmail.com>
On Fri, Feb 18, 2022 at 09:19:51AM -0800, Nick Desaulniers wrote:
> On Fri, Feb 18, 2022 at 5:14 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > Commit c37495d6254c ("slab: add __alloc_size attributes for better
> > bounds checking") added __alloc_size attributes to a bunch of kmalloc
> > function prototypes. Unfortunately the change to __kmalloc_track_caller
> > seems to cause clang to generate broken code and the first time this is
> > called when booting, the box will crash.
> >
> > While the compiler problems are being reworked and attempted to be
> > solved, let's just drop the attribute to solve the issue now. Once it
> > is resolved it can be added back.
>
> Sorry about the mess; we'll get it cleaned up!
> Acked-by: Nick Desaulniers <ndesaulniers@google.com>
> Link: https://github.com/ClangBuiltLinux/linux/issues/1599
Thanks for the issue link!
Acked-by: Kees Cook <keescook@chromium.org>
--
Kees Cook
next prev parent reply other threads:[~2022-02-19 23:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-18 13:13 Greg Kroah-Hartman
2022-02-18 17:14 ` Vlastimil Babka
2022-02-18 17:57 ` Greg Kroah-Hartman
2022-02-18 18:54 ` Vlastimil Babka
2022-02-19 7:19 ` Greg Kroah-Hartman
2022-02-18 17:19 ` Nick Desaulniers
2022-02-19 23:58 ` Kees Cook [this message]
2022-02-18 18:47 ` David Rientjes
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