From: QintaoShen <unSimple1993@163.com>
Date: Thu, 24 Mar 2022 08:35:40 +0000 (+0800)
Subject: soc: bcm: Check for NULL return of devm_kzalloc()
X-Git-Tag: v5.17.14~278
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=36339ea7bae4943be01c8e9545e46e334591fecd;p=thirdparty%2Fkernel%2Fstable.git

soc: bcm: Check for NULL return of devm_kzalloc()

[ Upstream commit b4bd2aafacce48db26b0a213d849818d940556dd ]

As the potential failure of allocation, devm_kzalloc() may return NULL.  Then
the 'pd->pmb' and the follow lines of code may bring null pointer dereference.

Therefore, it is better to check the return value of devm_kzalloc() to avoid
this confusion.

Fixes: 8bcac4011ebe ("soc: bcm: add PM driver for Broadcom's PMB")
Signed-off-by: QintaoShen <unSimple1993@163.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/soc/bcm/bcm63xx/bcm-pmb.c b/drivers/soc/bcm/bcm63xx/bcm-pmb.c
index 7bbe46ea5f945..9407cac47fdbe 100644
--- a/drivers/soc/bcm/bcm63xx/bcm-pmb.c
+++ b/drivers/soc/bcm/bcm63xx/bcm-pmb.c
@@ -312,6 +312,9 @@ static int bcm_pmb_probe(struct platform_device *pdev)
 	for (e = table; e->name; e++) {
 		struct bcm_pmb_pm_domain *pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
 
+		if (!pd)
+			return -ENOMEM;
+
 		pd->pmb = pmb;
 		pd->data = e;
 		pd->genpd.name = e->name;