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| author | Dan Williams <dan.j.williams@intel.com> | 2017-09-26 21:17:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 11:40:54 +0300 |
| commit | d6667298d1d0d47de619b23078ceb83ec2c09d46 (patch) | |
| tree | f00edaa4f8e7c47141648f607fec8e0c58f99834 /drivers/nvdimm | |
| parent | 913ff23bac73a9a8825942c957b6252ab3f8f198 (diff) | |
| download | linux-d6667298d1d0d47de619b23078ceb83ec2c09d46.tar.xz | |
libnvdimm, region : make 'resource' attribute only readable by root
commit b8ff981f88df03c72a4de2f6eaa9ce447a10ac03 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 region
devices only readable by root. Otherwise we disclose physical address
information.
Fixes: 802f4be6feee ("libnvdimm: Add 'resource' sysfs attribute to regions")
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/region_devs.c | 8 |
1 files changed, 6 insertions, 2 deletions
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); |