From: wangyingjie55@126.com
To: dan.j.williams@intel.com, vishal.l.verma@intel.com,
dave.jiang@intel.com, ira.weiny@intel.com,
linux-nvdimm@lists.01.org
Cc: wangyingjie55@126.com, linux-kernel@vger.kernel.org
Subject: [PATCH v1] libnvdimm, dax: Fix a missing check in nd_dax_probe()
Date: Thu, 8 Apr 2021 18:58:26 -0700 [thread overview]
Message-ID: <1617933506-13684-1-git-send-email-wangyingjie55@126.com> (raw)
From: Yingjie Wang <wangyingjie55@126.com>
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 <wangyingjie55@126.com>
---
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
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next reply other threads:[~2021-04-09 1:58 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-09 1:58 wangyingjie55 [this message]
2021-04-09 16:41 ` [PATCH v1] libnvdimm, dax: Fix a missing check in nd_dax_probe() Ira Weiny
-- strict thread matches above, loose matches on Subject: below --
2021-04-10 0:33 wangyingjie55
2021-04-10 4:54 ` Dan Williams
2021-03-17 9:36 wangyingjie55
2021-03-17 9:32 wangyingjie55
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