drivers/base: cacheinfo: validate device node for all the caches
authorSudeep Holla <sudeep.holla@arm.com>
Tue, 17 Mar 2015 17:28:46 +0000 (17:28 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 25 Mar 2015 13:38:41 +0000 (14:38 +0100)
commit8a7d95f95c95f396decbd4cda6d4903fc4664946
tree91c6199e18c369b5cd55ffa5b1659fcc707d5115
parent2071b9502dadffd22ac1bc31c68728e2783ec3ac
drivers/base: cacheinfo: validate device node for all the caches

On architectures that depend on DT for obtaining cache hierarcy, we need
to validate the device node for all the cache indices, failing to do so
might result in wrong information being exposed to the userspace.

This is quite possible on initial/incomplete versions of the device
trees. In such cases, it's better to bail out if all the required device
nodes are not present.

This patch adds checks for the validation of device node for all the
caches and doesn't initialise the cacheinfo if there's any error.

Reported-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: stable <stable@vger.kernel.org> # 4.0
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/base/cacheinfo.c