linux-kernel - [PATCH v1] soc: ti: ti_sci_pm_domains: Check for null return of devm

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Message-Id: <1648107843-29077-1-git-send-email-unSimple1993@163.com>
Date:   Thu, 24 Mar 2022 15:44:03 +0800
From:   QintaoShen <unSimple1993@....com>
To:     kristo@...nel.org
Cc:     ssantosh@...nel.org, nm@...com, linux-kernel@...r.kernel.org,
        QintaoShen <unSimple1993@....com>
Subject: [PATCH v1] soc: ti: ti_sci_pm_domains: Check for null return of devm_kcalloc

The allocation funciton devm_kcalloc may fail and return a null pointer,
which would cause a null-pointer dereference later.
It might be better to check it and directly return -ENOMEM just like the
usage of devm_kcalloc in previous code.

Signed-off-by: QintaoShen <unSimple1993@....com>
---
 drivers/soc/ti/ti_sci_pm_domains.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/soc/ti/ti_sci_pm_domains.c b/drivers/soc/ti/ti_sci_pm_domains.c
index 8afb3f45..a33ec7e 100644
--- a/drivers/soc/ti/ti_sci_pm_domains.c
+++ b/drivers/soc/ti/ti_sci_pm_domains.c
@@ -183,6 +183,8 @@ static int ti_sci_pm_domain_probe(struct platform_device *pdev)
 		devm_kcalloc(dev, max_id + 1,
 			     sizeof(*pd_provider->data.domains),
 			     GFP_KERNEL);
+	if (!pd_provider->data.domains)
+		return -ENOMEM;
 
 	pd_provider->data.num_domains = max_id + 1;
 	pd_provider->data.xlate = ti_sci_pd_xlate;
-- 
2.7.4