| Message ID | 150646664593.6588.2636887097527637750.stgit@dwillia2-desk3.amr.corp.intel.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 26417ae4fc61 |
| Headers | show |
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c index 9576c444f0ab..65cc171c721d 100644 --- a/drivers/nvdimm/pfn_devs.c +++ b/drivers/nvdimm/pfn_devs.c @@ -282,8 +282,16 @@ static struct attribute *nd_pfn_attributes[] = { NULL, }; +static umode_t pfn_visible(struct kobject *kobj, struct attribute *a, int n) +{ + if (a == &dev_attr_resource.attr) + return 0400; + return a->mode; +} + struct attribute_group nd_pfn_attribute_group = { .attrs = nd_pfn_attributes, + .is_visible = pfn_visible, }; static const struct attribute_group *nd_pfn_attribute_groups[] = {
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 pfn devices only readable by root. Otherwise we disclose physical address information. Fixes: f6ed58c70d14 ("libnvdimm, pfn: 'resource'-address and 'size'...") Cc: <stable@vger.kernel.org> Reported-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- drivers/nvdimm/pfn_devs.c | 8 ++++++++ 1 file changed, 8 insertions(+)