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Message-ID: <CALCETrVvoX+XM_2++o-VyQ0w2_nTr6QbgdOxnvCXBFKb+qMPBA@mail.gmail.com>
Date: Thu, 25 Aug 2016 04:13:48 -0700
From: Andy Lutomirski <luto@...capital.net>
To: Mickaël Salaün <mic@...ikod.net>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
Arnd Bergmann <arnd@...db.de>, Casey Schaufler <casey@...aufler-ca.com>,
Daniel Borkmann <daniel@...earbox.net>, Daniel Mack <daniel@...que.org>,
David Drysdale <drysdale@...gle.com>, "David S . Miller" <davem@...emloft.net>,
Elena Reshetova <elena.reshetova@...el.com>, James Morris <james.l.morris@...cle.com>,
Kees Cook <keescook@...omium.org>, Paul Moore <pmoore@...hat.com>,
Sargun Dhillon <sargun@...gun.me>, "Serge E . Hallyn" <serge@...lyn.com>, Will Drewry <wad@...omium.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, Linux API <linux-api@...r.kernel.org>,
LSM List <linux-security-module@...r.kernel.org>,
Network Development <netdev@...r.kernel.org>
Subject: Re: [RFC v2 07/10] landlock: Add errno check
On Thu, Aug 25, 2016 at 3:32 AM, Mickaël Salaün <mic@...ikod.net> wrote:
> Add a max errno value.
>
> This is not strictly needed but should improve reliability.
>
> Signed-off-by: Mickaël Salaün <mic@...ikod.net>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: Serge E. Hallyn <serge@...lyn.com>
> Cc: James Morris <james.l.morris@...cle.com>
> Cc: Kees Cook <keescook@...omium.org>
> ---
> include/uapi/asm-generic/errno-base.h | 1 +
> security/landlock/lsm.c | 6 +++---
> 2 files changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/include/uapi/asm-generic/errno-base.h b/include/uapi/asm-generic/errno-base.h
> index 65115978510f..43407a403e72 100644
> --- a/include/uapi/asm-generic/errno-base.h
> +++ b/include/uapi/asm-generic/errno-base.h
> @@ -35,5 +35,6 @@
> #define EPIPE 32 /* Broken pipe */
> #define EDOM 33 /* Math argument out of domain of func */
> #define ERANGE 34 /* Math result not representable */
> +#define _ERRNO_LAST ERANGE
At the very least this needs a more sensible name.
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