linux-kernel - Re: [PATCH v1] x86: Pin cr4 FSGSBASE

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Message-ID: <20200526211601.GA166522@kroah.com>
Date:   Tue, 26 May 2020 23:16:01 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Andi Kleen <andi@...stfloor.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org, sashal@...nel.org,
        Andi Kleen <ak@...ux.intel.com>, stable@...r.kernel.org
Subject: Re: [PATCH v1] x86: Pin cr4 FSGSBASE

On Tue, May 26, 2020 at 09:15:04AM -0700, Kees Cook wrote:
> On Tue, May 26, 2020 at 08:56:18AM +0200, Greg KH wrote:
> > What about those systems that panic-on-warn?
> 
> This is (modulo the general discussion about whether it's the right
> way to check) the correct use for WARN*(). It's an undesirable system
> state; people choosing panic-on-warn want this:
> https://www.kernel.org/doc/html/latest/process/deprecated.html#bug-and-bug-on

Ok, tha's good to know, thanks for that.

greg k-h