diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-09-26 11:21:24 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:37:23 +0000 |
| commit | 54a8d930b93f171acaffbac83a1d0f595fa277bd (patch) | |
| tree | 8d1fd9a05f226a3984a078b5389d3f9ce858bf6b | |
| parent | 4dae2f771fa72083cf247ea44bcdb7096409527d (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>
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index aae7379af4e4..c2184104b789 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1305,7 +1305,7 @@ 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)) { |