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nvdimm: Allow overwrite in the presence of disabled dimms

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[ Upstream commit bb7bf697fe ]

It is not clear why the original implementation of overwrite support
required the dimm driver to be active before overwrite could proceed. In
fact that can lead to cases where the kernel retains an invalid cached
copy of the labels from before the overwrite. Unfortunately the kernel
has not only allowed that case, but enforced it.

Going forward, allow for overwrite to happen while the label area is
offline, and follow-on with updates to 'ndctl sanitize-dimm --overwrite'
to trigger the label area invalidation by default.

Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Reported-by: Krzysztof Kensicki <krzysztof.kensicki@intel.com>
Fixes: 7d988097c5 ("acpi/nfit, libnvdimm/security: Add security DSM overwrite support")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Williams 2022-04-28 15:47:46 -07:00 • committed by Greg Kroah-Hartman
commit 8a8b40d007
1 changed files with 0 additions and 5 deletions
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5
drivers/nvdimm/security.c
View file

@ -379,11 +379,6 @@ static int security_overwrite(struct nvdimm *nvdimm, unsigned int keyid)
|| !nvdimm->sec.flags)
return -EOPNOTSUPP;
if (dev->driver == NULL) {
dev_dbg(dev, "Unable to overwrite while DIMM active.\n");
return -EINVAL;
}
rc = check_security_state(nvdimm);
if (rc)
return rc;