From: Yingjie Wang <[email protected]>
In nd_dax_probe()， 'nd_dax' is allocated by nd_dax_alloc().
nd_dax_alloc() may fail and return NULL, so we should better check
it's return value to avoid a NULL pointer dereference
a bit later in the code.
Fixes: c5ed9268643c ("libnvdimm, dax: autodetect support")
Signed-off-by: Yingjie Wang <[email protected]>
---
drivers/nvdimm/dax_devs.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/nvdimm/dax_devs.c b/drivers/nvdimm/dax_devs.c
index 99965077bac4..b1426ac03f01 100644
--- a/drivers/nvdimm/dax_devs.c
+++ b/drivers/nvdimm/dax_devs.c
@@ -106,6 +106,8 @@ int nd_dax_probe(struct device *dev, struct nd_namespace_common *ndns)
nvdimm_bus_lock(&ndns->dev);
nd_dax = nd_dax_alloc(nd_region);
+ if (!nd_dax)
+ return -ENOMEM;
nd_pfn = &nd_dax->nd_pfn;
dax_dev = nd_pfn_devinit(nd_pfn, ndns);
nvdimm_bus_unlock(&ndns->dev);
--
2.7.4