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 16:59:32 +0200 |
| commit | 6ecd4d5c28408df36a1a6f0b1973f633c949ac1f (patch) | |
| tree | 294f991b67e3049bb3ed5a6d00f34fb951693de6 | |
| parent | 3448aa3b941999f5fed7570ad6bad79972cbd18c (diff) | |
| download | linux-stable-6ecd4d5c28408df36a1a6f0b1973f633c949ac1f.tar.gz | |
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 964ed91416e1..671b6d275da3 100644 --- a/drivers/rtc/rtc-mt6397.c +++ b/drivers/rtc/rtc-mt6397.c @@ -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; rtc->irq = platform_get_irq(pdev, 0); |