linux-kernel - [PATCH 5.15 156/667] soc: ti: ti_sci_pm_domains: Check for null return of devm

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Message-Id: <20220607164939.494610235@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 18:57:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, QintaoShen <unSimple1993@....com>,
        Nishanth Menon <nm@...com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 156/667] soc: ti: ti_sci_pm_domains: Check for null return of devm_kcalloc

From: QintaoShen <unSimple1993@....com>

[ Upstream commit ba56291e297d28aa6eb82c5c1964fae2d7594746 ]

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>
Signed-off-by: Nishanth Menon <nm@...com>
Link: https://lore.kernel.org/r/1648107843-29077-1-git-send-email-unSimple1993@163.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 8afb3f45d263..a33ec7eaf23d 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;
-- 
2.35.1