[PATCH 5.12 067/173] usb: misc: brcmstb-usb-pinmap: check return value after calling platform_get_resource()

[Greg Kroah-Hartman]

From: Yang Yingliang <yangyingliang@xxxxxxxxxx>

commit fbf649cd6d64d40c03c5397ecd6b1ae922ba7afc upstream.

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

Fixes: 517c4c44b323 ("usb: Add driver to allow any GPIO to be used for 7211 USB signals")
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210605080914.2057758-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/misc/brcmstb-usb-pinmap.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/usb/misc/brcmstb-usb-pinmap.c
+++ b/drivers/usb/misc/brcmstb-usb-pinmap.c
@@ -263,6 +263,8 @@ static int __init brcmstb_usb_pinmap_pro
 		return -EINVAL;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -EINVAL;
 
 	pdata = devm_kzalloc(&pdev->dev,
 			     sizeof(*pdata) +