[RFC PATCH 4/4] libnvdimm/namespace: Add debug check while initializing namespace resource size.
From: Aneesh Kumar K.V <hidden>
Date: 2019-10-28 09:56:38
Also in:
nvdimm
Subsystem:
libnvdimm: non-volatile memory device subsystem, the rest · Maintainers:
Dan Williams, Vishal Verma, Dave Jiang, Ira Weiny, Linus Torvalds
This should enable us to catch if we are initializing the namespace with a wrong size. Signed-off-by: Aneesh Kumar K.V <redacted> --- drivers/nvdimm/namespace_devs.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
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)
--
2.21.0