Re: [RFC PATCH] panic: Add new taint flag for fault injection

Kees Cook
2022-12-01T16:53:10Z

On Thu, Dec 01, 2022 at 11:48:48AM -0500, Steven Rostedt wrote:
> On Thu, 1 Dec 2022 08:39:28 -0800
> Kees Cook <keescook@chromium.org> wrote:
>
> > 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?
> >
>
> Have you not been reading this thread?

I skimmed it -- trying to catch up from turkey week. If this was already
covered, then please ignore me. It just wasn't obvious from the commit
log why it was included.

--
Kees Cook