| Message ID | 150646663509.6588.1400157739735618779.stgit@dwillia2-desk3.amr.corp.intel.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | b8ff981f88df |
| Headers | show |
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 829d760f651c..abaf38c61220 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -562,8 +562,12 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n) 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);
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. Fixes: 802f4be6feee ("libnvdimm: Add 'resource' sysfs attribute to regions") Cc: <stable@vger.kernel.org> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Reported-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- drivers/nvdimm/region_devs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)