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libnvdimm, namespace: make 'resource' attribute only readable by root
commitc1fb354207
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:bf9bccc14c
("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>
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@ -1620,7 +1620,7 @@ static umode_t namespace_visible(struct kobject *kobj,
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if (a == &dev_attr_resource.attr) {
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if (is_namespace_blk(dev))
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return 0;
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return a->mode;
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return 0400;
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}
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if (is_namespace_pmem(dev) || is_namespace_blk(dev)) {
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