From: Kees Cook <keescook@chromium.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Emese Revfy <re.emese@gmail.com>,
Linux Next Mailing List <linux-next@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Willy Tarreau <w@1wt.eu>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Sami Tolvanen <samitolvanen@google.com>
Subject: Re: linux-next: build failure after merge of the origin tree
Date: Wed, 29 Jul 2020 20:17:48 -0700 [thread overview]
Message-ID: <202007292007.D87DBD34B@keescook> (raw)
In-Reply-To: <CAHk-=wjK8+12i8iDC41LXfZBcMjGsF+WyW_+ncPFmrexRT0yxw@mail.gmail.com>
On Wed, Jul 29, 2020 at 04:43:04PM -0700, Linus Torvalds wrote:
> On Wed, Jul 29, 2020 at 4:08 PM Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> >
> > include/linux/random.h:123:24: error: variable 'net_rand_state' with 'latent_entropy' attribute must not be local
> > 123 | DECLARE_PER_CPU(struct rnd_state, net_rand_state) __latent_entropy;
>
> Hmm.
>
> Ok, this shows a limitation of my allmodconfig testing (and all my
> normal builds) - no plugins. So that problem wasn't as obvious as it
> should have been.
I'll look into this more tomorrow. (But yes, __latent_entropy is
absolutely used for globals already, as you found, but this is the first
percpu it was applied to...)
> Adding the gcc plugin people. Otherwise the only option seems to be to
> just remove that __latent_entropy marker.
And just another heads-up, the patch[1] (which was never sent to a public
list) also breaks arm64 (circular header needs?):
$ make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 defconfig
...
$ make -j$(getconf _NPROCESSORS_ONLN) CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64
...
In file included from ./arch/arm64/include/asm/smp.h:33,
from ./include/linux/smp.h:82,
from ./include/linux/percpu.h:7,
from ./include/linux/random.h:14,
from arch/arm64/kernel/pointer_auth.c:5:
./arch/arm64/include/asm/pointer_auth.h: In function ‘ptrauth_keys_init_user’:
./arch/arm64/include/asm/pointer_auth.h:40:3: error: implicit declaration of function ‘get_random_bytes’; did you mean ‘get_random_once’? [-Werror=implicit-function-declaration]
40 | get_random_bytes(&keys->apia, sizeof(keys->apia));
| ^~~~~
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f227e3ec3b5cad859ad15666874405e8c1bbc1d4
--
Kees Cook
next prev parent reply other threads:[~2020-07-30 3:17 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-29 23:08 linux-next: build failure after merge of the origin tree Stephen Rothwell
2020-07-29 23:43 ` Linus Torvalds
2020-07-30 0:09 ` Linus Torvalds
2020-07-30 2:12 ` Linus Torvalds
2020-07-30 2:30 ` Willy Tarreau
2020-07-30 3:17 ` Kees Cook [this message]
2020-07-30 3:22 ` Willy Tarreau
2020-07-30 6:14 ` Willy Tarreau
2020-07-30 9:59 ` Marc Zyngier
2020-07-30 10:09 ` Catalin Marinas
2020-07-30 15:00 ` Will Deacon
2020-07-30 17:49 ` Kees Cook
2020-07-30 18:24 ` Linus Torvalds
2020-07-30 18:47 ` Kees Cook
-- strict thread matches above, loose matches on Subject: below --
2023-06-30 2:59 Stephen Rothwell
2023-06-30 3:43 ` Linus Torvalds
2021-09-19 23:42 Stephen Rothwell
2021-09-14 0:08 Stephen Rothwell
2021-09-14 0:19 ` Linus Torvalds
2021-09-14 0:24 ` Linus Torvalds
2021-09-14 0:58 ` Stephen Rothwell
2021-09-14 1:29 ` Linus Torvalds
2021-09-14 1:37 ` Linus Torvalds
2021-09-14 2:03 ` Linus Torvalds
2021-09-14 2:08 ` Stephen Rothwell
2021-09-14 2:12 ` Linus Torvalds
2021-09-14 2:50 ` Michael Ellerman
2021-09-14 12:21 ` Michael Ellerman
2021-09-14 2:39 ` Stephen Rothwell
2021-09-07 23:07 Stephen Rothwell
2021-09-07 23:09 ` Stephen Rothwell
2021-09-07 23:17 ` Marco Elver
2021-09-07 23:38 ` Miguel Ojeda
2020-07-30 22:58 Stephen Rothwell
2020-07-30 23:15 ` Stephen Rothwell
2020-06-04 22:37 Stephen Rothwell
2020-06-05 0:04 ` Josh Poimboeuf
2020-06-05 9:48 ` Jessica Yu
2020-04-20 10:23 Stephen Rothwell
2020-01-31 4:12 Stephen Rothwell
2020-01-31 4:17 ` Randy Dunlap
2020-01-31 9:39 ` Daniel Lezcano
2012-10-09 23:21 Stephen Rothwell
2012-10-09 23:45 ` Andrew Morton
2012-10-09 23:52 ` Yasuaki Ishimatsu
2012-10-10 3:12 ` Stephen Rothwell
2012-10-10 0:07 ` Stephen Rothwell
2012-06-04 2:57 Stephen Rothwell
2012-06-04 7:39 ` Paul Mundt
2012-01-18 23:31 Stephen Rothwell
2012-01-19 8:21 ` Jens Axboe
2012-01-19 8:23 ` Jens Axboe
2011-11-06 23:12 Stephen Rothwell
2011-11-07 1:52 ` David Miller
2011-11-07 2:47 ` Stephen Rothwell
2011-11-07 3:36 ` David Miller
2011-11-07 5:29 ` Kirsher, Jeffrey T
2011-11-07 16:46 ` Rose, Gregory V
2011-11-07 17:46 ` Rose, Gregory V
2011-07-25 1:16 Stephen Rothwell
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