| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.18 060/339] rtc: mt6397: check return value after calling platform_get_resource() | Date | Mon, 13 Jun 2022 12:08:05 +0200 |
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From: Yang Yingliang <yangyingliang@huawei.com>
[ 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 <yangyingliang@huawei.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220505125043.1594771-1-yangyingliang@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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); -- 2.35.1
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