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Subject[PATCH] rtc: mt6397: check return value after calling platform_get_resource()
Date
It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Fixes: fc2979118f3f ("rtc: mediatek: Add MT6397 RTC driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
drivers/rtc/rtc-mt6397.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c
index 80dc479a6ff0..1d297af80f87 100644
--- a/drivers/rtc/rtc-mt6397.c
+++ b/drivers/rtc/rtc-mt6397.c
@@ -269,6 +269,8 @@ static int mtk_rtc_probe(struct platform_device *pdev)
return -ENOMEM;

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
rtc->addr_base = res->start;

rtc->data = of_device_get_match_data(&pdev->dev);
--
2.25.1
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