Re: [kernel-hardening] [PATCH v2 1/7] bug: Clarify help text for BUG_ON_DATA_CORRUPTION

[Ian Campbell]

> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 77fadface4f9..5ac4d1148385 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1998,9 +1998,12 @@ config BUG_ON_DATA_CORRUPTION
> >  	bool "Trigger a BUG when data corruption is detected"
> >  	select DEBUG_LIST
> >  	help
> > -	  Select this option if the kernel should BUG when it encounters
> > -	  data corruption in kernel memory structures when they get checked
> > -	  for validity.
> > +	  This option enables several inexpensive data corruption checks.
> > +	  Most of these checks normally just WARN and try to further avoid
> +	  the corruption. Selecting this option upgrades these to BUGs so

First it says it enables some checks, but here it says it upgrades them
to BUGs which seems inconsistent.

> +	  that the offending process is killed. Additionally, the system
> +	  owner can furhter configure the system for immediate reboots

                   "further"

> +	  (via panic_on_oops sysctl) or crash dumps.
>  
> >  	  If unsure, say N.
>