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Commit 8b9c1c33 authored by Yang Yingliang's avatar Yang Yingliang Committed by Greg Kroah-Hartman
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usb: dwc2: check return value after calling platform_get_resource() 



[ Upstream commit 856e6e8e0f9300befa87dde09edb578555c99a82 ]

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

Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210831084236.1359677-1-yangyingliang@huawei.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 5d124ee0

drivers/usb/dwc2/hcd.c

+4 −0
Original line number Diff line number Diff line
@@ -5074,6 +5074,10 @@ 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);