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nvdimm: Sanity check labeloff 

This patch adds validation for the labeloff field in the indexes.

Reviewed-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Alexander Duyck 2018-10-10 16:38:41 -07:00 committed by Dan Williams
parent d11cf4a732
commit d86d4d63d8
1 changed files with 7 additions and 0 deletions
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7
drivers/nvdimm/label.c
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@ -183,6 +183,13 @@ static int __nd_label_validate(struct nvdimm_drvdata *ndd)
__le64_to_cpu(nsindex[i]->otheroff));
continue;
}
if (__le64_to_cpu(nsindex[i]->labeloff)
!= 2 * sizeof_namespace_index(ndd)) {
dev_dbg(dev, "nsindex%d labeloff: %#llx invalid\n",
i, (unsigned long long)
__le64_to_cpu(nsindex[i]->labeloff));
continue;
}
size = __le64_to_cpu(nsindex[i]->mysize);
if (size > sizeof_namespace_index(ndd)