From: Jesper Juhl <jj@chaosbits.net>
Date: Fri, 23 Mar 2012 00:08:34 +0000 (+0100)
Subject: drivers/platform/x86/amilo-rfkill.c::amilo_rfkill_probe() avoid NULL deref
X-Git-Tag: v3.4-rc1~63^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41603e9783a24c8c7cce548c0819bdc9e46a585b;p=pandora-kernel.git

drivers/platform/x86/amilo-rfkill.c::amilo_rfkill_probe() avoid NULL deref

In drivers/platform/x86/amilo-rfkill.c::amilo_rfkill_probe() the call
to dmi_first_match() may fail and return NULL. If it does return NULL,
then we'll be dereferencing a NULL pointer in the rfkill_alloc() call
where we do 'system_id->driver_data' --> KABOOM!

Avoid that problem by testing for a NULL return value from
dmi_first_match() and bailing out if it fails.

I was a bit uncertain about what to return in the failure case. In the
end I settled for -ENXIO as the most logical error to return.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
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