From: Yang Yingliang <yangyingliang@xxxxxxxxxx> [ Upstream commit 14651496a3de6807a17c310f63c894ea0c5d858e ] 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/20210915034925.2399823-1-yangyingliang@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/usb/musb/tusb6010.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c index 7d7cb1c5ec808..9a7b5b2d7ccc7 100644 --- a/drivers/usb/musb/tusb6010.c +++ b/drivers/usb/musb/tusb6010.c @@ -1108,6 +1108,11 @@ static int tusb_musb_init(struct musb *musb) /* dma address for async dma */ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + pr_debug("no async dma resource?\n"); + ret = -ENODEV; + goto done; + } musb->async = mem->start; /* dma address for sync dma */ -- 2.33.0
