linux-kernel - [PATCH] usb: host: ohci-tmio: check return value after calling platform_get

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Date:   Wed, 15 Sep 2021 11:45:44 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
CC:     <gregkh@...uxfoundation.org>, <stern@...land.harvard.edu>
Subject: [PATCH] usb: host: ohci-tmio: check return value after calling platform_get_resource()

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/usb/host/ohci-tmio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
index 08ec2ab0d95a..68e769b82061 100644
--- a/drivers/usb/host/ohci-tmio.c
+++ b/drivers/usb/host/ohci-tmio.c
@@ -202,6 +202,9 @@ static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
 	if (!cell)
 		return -EINVAL;
 
+	if (!regs || !config || !sram)
+		return -EINVAL;
+
 	if (irq < 0)
 		return irq;
 
-- 
2.25.1