[PATCH 5.16 0312/1017] soc: qcom: rpmpd: Check for null return of devm_kcalloc

From: Greg Kroah-Hartman
Date: Tue Apr 05 2022 - 07:46:27 EST

From: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>

[ Upstream commit 5a811126d38f9767a20cc271b34db7c8efc5a46c ]

Because of the possible failure of the allocation, data->domains might
be NULL pointer and will cause the dereference of the NULL pointer
Therefore, it might be better to check it and directly return -ENOMEM
without releasing data manually if fails, because the comment of the
devm_kmalloc() says "Memory allocated with this function is
automatically freed on driver detach.".

Fixes: bbe3a66c3f5a ("soc: qcom: rpmpd: Add a Power domain driver to model corners")
Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211231094419.1941054-1-jiasheng@xxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/soc/qcom/rpmpd.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/soc/qcom/rpmpd.c b/drivers/soc/qcom/rpmpd.c
index 4f69fb9b2e0e..69b587822e39 100644
--- a/drivers/soc/qcom/rpmpd.c
+++ b/drivers/soc/qcom/rpmpd.c
@@ -570,6 +570,9 @@ static int rpmpd_probe(struct platform_device *pdev)

data->domains = devm_kcalloc(&pdev->dev, num, sizeof(*data->domains),
+ if (!data->domains)
+ return -ENOMEM;
data->num_domains = num;

for (i = 0; i < num; i++) {