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Message-Id: <20221122023350.29128-1-jiasheng@iscas.ac.cn>
Date: Tue, 22 Nov 2022 10:33:50 +0800
From: Jiasheng Jiang <jiasheng@...as.ac.cn>
To: dan.j.williams@...el.com, vishal.l.verma@...el.com,
dave.jiang@...el.com, ira.weiny@...el.com
Cc: nvdimm@...ts.linux.dev, linux-kernel@...r.kernel.org,
Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] libnvdimm: Add check for nd_dax_alloc
As the nd_dax_alloc may return NULL pointer,
it should be better to add check for the return
value, as same as the one in nd_dax_create().
Fixes: c5ed9268643c ("libnvdimm, dax: autodetect support")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
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 7f4a9d28b670..9efe62b95dd8 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);
--
2.25.1
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