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authorDan Williams <dan.j.williams@intel.com>2017-09-26 11:21:24 -0700
committerDan Williams <dan.j.williams@intel.com>2017-09-28 09:13:06 -0700
commitc1fb3542074fd0c4d901d778bd52455111e4eb6f (patch)
tree1271745a621c28817bced029c293dae3cf6cffe1
parentb8ff981f88df03c72a4de2f6eaa9ce447a10ac03 (diff)
downloadlinux-c1fb3542074fd0c4d901d778bd52455111e4eb6f.tar.bz2
libnvdimm, namespace: make 'resource' attribute only readable by root
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") Cc: <stable@vger.kernel.org> Reported-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-rw-r--r--drivers/nvdimm/namespace_devs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 3e4d1e7998da..0af988739a06 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1620,7 +1620,7 @@ static umode_t namespace_visible(struct kobject *kobj,
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)) {