diff options
| author | Yang Yingliang <yangyingliang@huawei.com> | 2022-05-05 20:50:43 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-14 18:44:50 +0200 |
| commit | da38e86d6cf6dd3bc65c602d998f357145aa1a0b (patch) | |
| tree | 06e183081e0aafe6f106131d72863f1af133cf84 | |
| parent | b3c6a3ef8078d931c3d4f1d77b331187ad920844 (diff) | |
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 <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>
| -rw-r--r-- | drivers/rtc/rtc-mt6397.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c index 80dc479a6ff02..1d297af80f878 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); |