This is a note to let you know that I've just added the patch titled usb: dwc2: check return value after calling platform_get_resource() to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-dwc2-check-return-value-after-calling-platform_g.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 1ff934db634034d6343efae586aea09dc9b5130a Author: Yang Yingliang <yangyingliang@xxxxxxxxxx> Date: Tue Aug 31 16:42:36 2021 +0800 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: Yang Yingliang <yangyingliang@xxxxxxxxxx> Link: https://lore.kernel.org/r/20210831084236.1359677-1-yangyingliang@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index f29fbadb0548..78329d0e9af0 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -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);