Patch "libnvdimm, region : make 'resource' attribute only readable by root" has been added to the 4.14-stable tree

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

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

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
libnvdimm-region-make-resource-attribute-only-readable-by-root.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Dan Williams <[email protected]>
Date: Tue, 26 Sep 2017 11:17:52 -0700
Subject: libnvdimm, region : make 'resource' attribute only readable by root

From: Dan Williams <[email protected]>

commit b8ff981f88df03c72a4de2f6eaa9ce447a10ac03 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 region devices only readable by root. Otherwise we disclose physical address information.

---
 drivers/nvdimm/region_devs.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

@@ -562,8 +562,12 @@ static umode_t region_visible(struct kob
 	if (!is_nd_pmem(dev) && a == &dev_attr_badblocks.attr)
 		return 0;
 
-	if (!is_nd_pmem(dev) && a == &dev_attr_resource.attr)
-		return 0;
+	if (a == &dev_attr_resource.attr) {
+		if (is_nd_pmem(dev))
+			return 0400;
+		else
+			return 0;
+	}
 
 	if (a == &dev_attr_deep_flush.attr) {
 		int has_flush = nvdimm_has_flush(nd_region);

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/libnvdimm-dimm-clear-locked-status-on-successful-dimm-enable.patch queue-4.14/libnvdimm-pfn-make-resource-attribute-only-readable-by-root.patch queue-4.14/libnvdimm-region-make-resource-attribute-only-readable-by-root.patch queue-4.14/dax-fix-pmd-faults-on-zero-length-files.patch queue-4.14/libnvdimm-namespace-make-resource-attribute-only-readable-by-root.patch queue-4.14/dax-fix-general-protection-fault-in-dax_alloc_inode.patch queue-4.14/libnvdimm-namespace-fix-label-initialization-to-use-valid-seq-numbers.patch