Re: [PATCH] sysrq: Allow access to sensitive keys to be restrictedby default

[Dave Jones]

On Mon, Sep 30, 2013 at 02:31:08AM +0100, Ben Hutchings wrote:
 > From: Bastian Blank <waldi@xxxxxxxxxx>
 > 
 > Add a Kconfig variable to set the initial value of the Magic SysRq mask
 > (sysctl: kernel.sysrq).
 > 
 > Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
 > ---
 > This has been in Debian for a while, but should probably be signed-off
 > by Bastian as well.
 > 
 > Debian sets this to 0x01b6, which excludes.
 > 
 >           8 - enable debugging dumps of processes etc.
 >          64 - enable signalling of processes (term, kill, oom-kill)
 > ...
 >  
 > +config MAGIC_SYSRQ_DEFAULT_MASK
 > +	hex "Default mask for Magic SysRq keys on the console"
 > +	depends on MAGIC_SYSRQ
 > +	default 1
 > +	help
 > +	  Specifies the default mask for the allowed SysRq keys.  This can be
 > +	  used to disable several sensitive keys by default.

Might be nice to have the mask values duplicated here to save having to
go grepping through code ?

	Dave

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