Date: Tue, 11 Sep 2018 09:06:15 -0700 From: Eric Biggers <ebiggers@...nel.org> To: Kristen Carlson Accardi <kristen@...ux.intel.com> Cc: kernel-hardening@...ts.openwall.com Subject: Re: [RFC PATCH] x86: entry: flush the cache if syscall error 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
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