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Message-ID: <CAJcbSZEqeKVKbtUABzuhavxoH9KWCaVUBG3j5owAwyRhiw8Z7g@mail.gmail.com>
Date: Thu, 23 Mar 2017 08:14:44 -0700
From: Thomas Garnier <thgarnie@...gle.com>
To: "H. Peter Anvin" <hpa@...or.com>
Cc: Andy Lutomirski <luto@...capital.net>, Martin Schwidefsky <schwidefsky@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>, Dave Hansen <dave.hansen@...el.com>,
David Howells <dhowells@...hat.com>, Al Viro <viro@...iv.linux.org.uk>,
Arnd Bergmann <arnd@...db.de>, René Nyffenegger <mail@...enyffenegger.ch>,
Andrew Morton <akpm@...ux-foundation.org>,
"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>, Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>, Oleg Nesterov <oleg@...hat.com>,
Pavel Tikhomirov <ptikhomirov@...tuozzo.com>, Stephen Smalley <sds@...ho.nsa.gov>,
Ingo Molnar <mingo@...hat.com>, Andy Lutomirski <luto@...nel.org>, Paolo Bonzini <pbonzini@...hat.com>,
Rik van Riel <riel@...hat.com>, Kees Cook <keescook@...omium.org>,
Josh Poimboeuf <jpoimboe@...hat.com>, Borislav Petkov <bp@...en8.de>, Brian Gerst <brgerst@...il.com>,
"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
Christian Borntraeger <borntraeger@...ibm.com>, Russell King <linux@...linux.org.uk>,
Vladimir Murzin <vladimir.murzin@....com>, Will Deacon <will.deacon@....com>,
Catalin Marinas <catalin.marinas@....com>, Mark Rutland <mark.rutland@....com>,
James Morse <james.morse@....com>,
"linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Linux API <linux-api@...r.kernel.org>,
X86 ML <x86@...nel.org>,
"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
"kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH v4 1/4] syscalls: Restore address limit after a syscall
Okay well then people are fine with a BUG_ON approach. I will do a
next iteration tailored to that. I will also try to add the static
inline suggestion from Peter.
On Wed, Mar 22, 2017 at 1:54 PM, H. Peter Anvin <hpa@...or.com> wrote:
> On 03/22/17 13:49, Thomas Garnier wrote:
>>
>> We can default to BUGging. I think my approach was avoiding doing a
>> BUG_ON just to avoid breaking people.
>>
>
> Breaking on a potentially-exploitable bug is a feature.
>
> -hpa
>
>
--
Thomas
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