linux-kernel - Re: [PATCH] error-injection: Add prompt for function error injection

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Message-ID: <20221121192423.1ab25c4d@gandalf.local.home>
Date:   Mon, 21 Nov 2022 19:24:23 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Borislav Petkov <bp@...en8.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        KP Singh <kpsingh@...nel.org>, Chris Mason <clm@...a.com>,
        Mark Rutland <mark.rutland@....com>,
        Florent Revest <revest@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH] error-injection: Add prompt for function error
 injection

On Mon, 21 Nov 2022 15:36:08 -0800
Alexei Starovoitov <alexei.starovoitov@...il.com> wrote:

> The commit log is bogus and the lack of understanding what
> bpf and error injection hooks are used for expressed
> in this thread is quite sad.
> Disabling error injection makes the system _less_ secure.

Please specify.

As Masami replied, you are abusing this feature for some arcane way to do
security. It's "error injection" how does enabling this improve security???

-- Steve


> But giving people an option to reduce security is a decision
> that every distro and data center has to make on their own.