This is a note to let you know that I've just added the patch titled

libnvdimm, namespace: make 'resource' attribute only readable by root

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: libnvdimm-namespace-make-resource-attribute-only-readable-by-root.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From c1fb3542074fd0c4d901d778bd52455111e4eb6f Mon Sep 17 00:00:00 2001

From: Dan Williams dan.j.williams@intel.com Date: Tue, 26 Sep 2017 11:21:24 -0700 Subject: libnvdimm, namespace: make 'resource' attribute only readable by root

From: Dan Williams dan.j.williams@intel.com

commit c1fb3542074fd0c4d901d778bd52455111e4eb6f upstream.

For the same reason that /proc/iomem returns 0's for non-root readers and acpi tables are root-only, make the 'resource' attribute for namespace devices only readable by root. Otherwise we disclose physical address information.

Fixes: bf9bccc14c05 ("libnvdimm: pmem label sets and namespace instantiation") Reported-by: Dave Hansen dave.hansen@linux.intel.com Signed-off-by: Dan Williams dan.j.williams@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/nvdimm/namespace_devs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1451,7 +1451,7 @@ static umode_t namespace_visible(struct if (a == &dev_attr_resource.attr) { if (is_namespace_blk(dev)) return 0; - return a->mode; + return 0400; }

if (is_namespace_pmem(dev) || is_namespace_blk(dev)) {

Patches currently in stable-queue which might be from dan.j.williams@intel.com are

queue-4.9/libnvdimm-pfn-make-resource-attribute-only-readable-by-root.patch queue-4.9/libnvdimm-namespace-make-resource-attribute-only-readable-by-root.patch queue-4.9/libnvdimm-namespace-fix-label-initialization-to-use-valid-seq-numbers.patch