03 Nov, 2017

1 commit

  • In preparation for unconditionally passing the struct timer_list pointer to
    all timer callbacks, switch to using the new timer_setup() and from_timer()
    to pass the timer pointer explicitly.

    Cc: Florian Fainelli
    Cc: bcm-kernel-feedback-list@broadcom.com
    Cc: David Howells
    Cc: Arnd Bergmann
    Cc: linux-pcmcia@lists.infradead.org
    Cc: linux-arm-kernel@lists.infradead.org
    Signed-off-by: Kees Cook
    Acked-by: Russell King # for soc_common.c

    Kees Cook
     

20 Apr, 2017

1 commit

  • When the kernel is running in secure boot mode, we lock down the kernel to
    prevent userspace from modifying the running kernel image. Whilst this
    includes prohibiting access to things like /dev/mem, it must also prevent
    access by means of configuring driver modules in such a way as to cause a
    device to access or modify the kernel image.

    To this end, annotate module_param* statements that refer to hardware
    configuration and indicate for future reference what type of parameter they
    specify. The parameter parser in the core sees this information and can
    skip such parameters with an error message if the kernel is locked down.
    The module initialisation then runs as normal, but just sees whatever the
    default values for those parameters is.

    Note that we do still need to do the module initialisation because some
    drivers have viable defaults set in case parameters aren't specified and
    some drivers support automatic configuration (e.g. PNP or PCI) in addition
    to manually coded parameters.

    This patch annotates drivers in drivers/pcmcia/.

    Suggested-by: Alan Cox
    Signed-off-by: David Howells
    cc: linux-pcmcia@lists.infradead.org

    David Howells
     

20 Oct, 2014

1 commit