[RFC,4/4] libnvdimm/namespace: Add debug check while initializing namespace resource size.
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Message ID 20191028094825.21448-4-aneesh.kumar@linux.ibm.com
State New
Headers show
Series
  • Untitled series #194427
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Commit Message

Aneesh Kumar K.V Oct. 28, 2019, 9:48 a.m. UTC
This should enable us to catch if we are initializing the namespace with a wrong
size.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 drivers/nvdimm/namespace_devs.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Patch
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diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 83c70631a86f..9f2dc20bcc73 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -956,6 +956,18 @@  static void nd_namespace_pmem_set_resource(struct nd_region *nd_region,
  out:
 	res->start = nd_region->ndr_start + offset;
 	res->end = res->start + size - 1;
+#ifdef CONFIG_DEBUG_VM
+	if (size) {
+		unsigned long map_size;
+
+		map_size = arch_validate_namespace_size(nd_region->ndr_mappings, size);
+		WARN_ON(map_size);
+
+		map_size = arch_validate_namespace_size(1, res->start);
+		WARN_ON(map_size);
+
+	}
+#endif
 }
 
 static bool uuid_not_set(const u8 *uuid, struct device *dev, const char *where)