Re: [PATCH v5] init: Disable defaults if init= fails

From: Rusty Russell
Date: Tue Oct 14 2014 - 02:54:04 EST

Andy Lutomirski <luto@xxxxxxxxxxxxxx> writes:
> If a user puts init=/whatever on the command line and /whatever
> can't be run, then the kernel will try a few default options before
> giving up. If init=/whatever came from a bootloader prompt, then
> this is unexpected but probably harmless. On the other hand, if it
> comes from a script (e.g. a tool like virtme or perhaps a future
> kselftest script), then the fallbacks are likely to exist, but
> they'll do the wrong thing. For example, they might unexpectedly
> invoke systemd.
> This makes a failure to run the specified init= process be fatal.
> As a temporary measure, users can set CONFIG_INIT_FALLBACK=y to
> preserve the old behavior. If no one speaks up, we can remove that
> option entirely after a release or two.
> Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxxxxxx>

Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

Andrew, please apply.

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