From: Peter Zijlstra <peterz@infradead.org>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Kees Cook <kees@kernel.org>,
jannh@google.com, jmill@asu.edu, joao@overdrivepizza.com,
linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org,
luto@kernel.org, samitolvanen@google.com
Subject: Re: [RFC] Circumventing FineIBT Via Entrypoints
Date: Fri, 14 Feb 2025 11:05:45 +0100 [thread overview]
Message-ID: <20250214100545.GG21726@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <6641d1e0-7151-4857-bb0e-db555d4cdf50@citrix.com>
On Thu, Feb 13, 2025 at 08:41:16PM +0000, Andrew Cooper wrote:
> The problem is that SYSCALL entry/exit is a toxic operating mode,
> because you only have to think about sneezing and another user->kernel
> priv-esc appears.
For a very brief moment I thought we could leave out the ENDBR there and
eat the #CP, but 1) slow, and 2) then #CP needs to be an IST and ARGHH.
So yeah, I didn't just suggest anything at all.
I hate all this.
next prev parent reply other threads:[~2025-02-14 10:05 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-12 21:08 [RFC] Circumventing FineIBT Via Entrypoints Jennifer Miller
2025-02-12 22:29 ` Jann Horn
2025-02-13 1:31 ` Andrew Cooper
2025-02-13 2:09 ` Jann Horn
2025-02-13 2:42 ` Andrew Cooper
2025-02-22 20:43 ` Rudolf Marek
2025-02-25 18:10 ` Andrew Cooper
2025-02-25 20:06 ` Rudolf Marek
2025-02-25 21:14 ` Andrew Cooper
2025-02-26 2:55 ` Kees Cook
2025-02-26 22:48 ` Rudolf Marek
2025-02-27 0:41 ` Andrew Cooper
2025-03-01 22:48 ` Rudolf Marek
2025-03-02 19:16 ` Rudolf Marek
2025-03-02 22:31 ` Andrew Cooper
2025-02-28 12:13 ` Florian Weimer
2025-02-13 20:28 ` Kees Cook
2025-02-13 20:41 ` Andrew Cooper
2025-02-13 20:53 ` Kees Cook
2025-02-13 20:57 ` Jann Horn
2025-02-16 23:42 ` Kees Cook
2025-02-14 9:57 ` Peter Zijlstra
2025-02-15 21:07 ` Peter Zijlstra
2025-02-16 23:51 ` Kees Cook
2025-02-17 10:39 ` Peter Zijlstra
2025-02-17 13:06 ` David Laight
2025-02-17 13:13 ` Peter Zijlstra
2025-02-17 18:38 ` David Laight
2025-02-17 18:54 ` Peter Zijlstra
2025-02-14 10:05 ` Peter Zijlstra [this message]
2025-02-14 9:54 ` Peter Zijlstra
2025-02-13 6:15 ` Jennifer Miller
2025-02-13 19:23 ` Jann Horn
2025-02-13 21:24 ` Andrew Cooper
2025-02-13 23:24 ` Jennifer Miller
2025-02-13 23:43 ` Jann Horn
2025-02-14 23:06 ` Andrew Cooper
2025-02-15 0:07 ` Jennifer Miller
2025-02-15 0:11 ` Andrew Cooper
2025-02-15 0:19 ` Jennifer Miller
2025-02-14 22:25 ` Josh Poimboeuf
2025-02-18 19:18 ` Joao Moreira
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