From: Eric Biggers <ebiggers@kernel.org>
To: Kristen Carlson Accardi <kristen@linux.intel.com>
Cc: kernel-hardening@lists.openwall.com
Subject: Re: [RFC PATCH] x86: entry: flush the cache if syscall error
Date: Tue, 11 Sep 2018 09:06:15 -0700 [thread overview]
Message-ID: <20180911160614.GA736@sol.localdomain> (raw)
In-Reply-To: <20180910191002.350195-1-kristen@linux.intel.com>
On Mon, Sep 10, 2018 at 12:10:02PM -0700, Kristen Carlson Accardi wrote:
> This patch aims to make it harder to perform cache timing attacks on data
> left behind by system calls. If we have an error returned from a syscall,
> flush the L1 cache.
Which L1 cache? There's no guarantee the task stayed on the same CPU...
- Eric
next prev parent reply other threads:[~2018-09-11 16:06 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-10 19:10 [RFC PATCH] x86: entry: flush the cache if syscall error Kristen Carlson Accardi
2018-09-10 20:32 ` Jann Horn
2018-09-11 15:58 ` Kristen C Accardi
2018-09-11 16:12 ` Jann Horn
2018-09-11 8:41 ` Greg KH
2018-09-11 16:01 ` Kristen C Accardi
2018-09-11 16:06 ` Eric Biggers [this message]
2018-09-12 17:29 ` Kristen C Accardi
2018-09-12 17:45 ` Eric Biggers
2018-09-12 18:19 ` Rik van Riel
2018-09-11 18:02 ` Jann Horn
2018-09-12 17:34 ` Kristen C Accardi
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