From 865051de2d9eaa50630e055b73921ceaf3c4a7fc Mon Sep 17 00:00:00 2001 From: Yang Yingliang Date: Thu, 5 May 2022 20:50:43 +0800 Subject: [PATCH] rtc: mt6397: check return value after calling platform_get_resource() [ Upstream commit d3b43eb505bffb8e4cdf6800c15660c001553fe6 ] 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 Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20220505125043.1594771-1-yangyingliang@huawei.com Signed-off-by: Sasha Levin --- 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 80dc479..1d297af 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); -- 2.7.4