This is a note to let you know that I've just added the patch titled
rtc: mt6397: check return value after calling platform_get_resource()
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rtc-mt6397-check-return-value-after-calling-platform.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3eb728bc02a9c1eb05f5b2187fad5e5419a3f307
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date: Thu May 5 20:50:43 2022 +0800
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@xxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220505125043.1594771-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
