summaryrefslogtreecommitdiff
path: root/drivers/nvdimm
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2017-09-26 11:21:24 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-11-30 08:39:07 +0000
commit194eb4a4fcd2098d00bca50561a18078b2a843e0 (patch)
treed149813eaa3e723c1955d6b4719b3ad093921f06 /drivers/nvdimm
parent6e83c891b68aa1f27a20489dfde38b189738bf8a (diff)
libnvdimm, namespace: make 'resource' attribute only readable by root
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>
Diffstat (limited to 'drivers/nvdimm')
-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 a38ae34b74e4..b8fb1ef1fc15 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1451,7 +1451,7 @@ 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)) {