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;