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rtc: mt6397: check return value after calling platform_get_resource()

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[ 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>
This commit is contained in:
Yang Yingliang 2022-05-05 20:50:43 +08:00 committed by Greg Kroah-Hartman
parent 6c493fde4c
commit 3867f0bbb9
1 changed files with 2 additions and 0 deletions
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2
drivers/rtc/rtc-mt6397.c
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@ -339,6 +339,8 @@ 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;
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);