Patch "soc: bcm: Check for NULL return of devm_kzalloc()" has been added to the 5.18-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

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

to the 5.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     soc-bcm-check-for-null-return-of-devm_kzalloc.patch
and it can be found in the queue-5.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 630ebd8f1825af33183faf459dc8ab75c81f82d0
Author: QintaoShen <unSimple1993@xxxxxxx>
Date:   Thu Mar 24 16:35:40 2022 +0800

    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@xxxxxxx>
    Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/soc/bcm/bcm63xx/bcm-pmb.c b/drivers/soc/bcm/bcm63xx/bcm-pmb.c
index 7bbe46ea5f94..9407cac47fdb 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;