usb: dwc2: check return value after calling platform_get_resource()

Started by Yang Yingliang on Aug 31, 2021

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DORMANTno replies LANDED

Status: Landed in mainline as 856e6e8e0f93 on 2021-09-14.

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

Signed-off-by: Yang Yingliang <redacted>
---
 drivers/usb/dwc2/hcd.c | 4 ++++
 1 file changed, 4 insertions(+)
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index 2a7828971d05..a215ec9e172e 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -5191,6 +5191,10 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg)
 	hcd->has_tt = 1;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		retval = -EINVAL;
+		goto error1;
+	}
 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);
 
-- 
2.25.1
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