From: Yang Yingliang <yangyingliang@huawei.com> stable inclusion from stable-v4.19.315 commit a7182993dd8e09f96839ddc3ac54f9b37370d282 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9R4OY CVE: CVE-2021-47409 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v... -------------------------------- [ Upstream commit 856e6e8e0f9300befa87dde09edb578555c99a82 ] It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20210831084236.1359677-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Wenyu Huang <huangwenyu5@huawei.com> --- 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 a5c8329fd462..de9b6a640def 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -5233,6 +5233,10 @@ 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); -- 2.34.1