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Date:   Thu, 1 Dec 2022 08:39:28 -0800
From:   Kees Cook <keescook@chromium.org>
To:     "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        Borislav Petkov <bp@alien8.de>,
        Alexei Starovoitov <alexei.starovoitov@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        KP Singh <kpsingh@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Florent Revest <revest@chromium.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Christoph Hellwig <hch@infradead.org>,
        Chris Mason <clm@meta.com>
Subject: Re: [RFC PATCH] panic: Add new taint flag for fault injection
Message-ID: <202212010838.B0B109DA@keescook>
References: <20221201234121.8925fdf83115747ac4ac116a@kernel.org>
 <166991263326.311919.16890937584677289681.stgit@devnote3>
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On Fri, Dec 02, 2022 at 01:37:13AM +0900, Masami Hiramatsu (Google) wrote:
> From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
> 
> Since the function error injection framework in the fault injection
> subsystem can change the function code flow forcibly, it may cause
> unexpected behavior (but that is the purpose of this feature).
> To identify this in the kernel oops message, add a new taint flag
> for this, and set it if it is (and similar things in BPF) used.

Why is hooking through BPF considered to be "fault injection" here?

-- 
Kees Cook