From: Yang Yingliang <yangyingliang@huawei.com>
Date: Wed, 15 Sep 2021 03:49:25 +0000 (+0800)
Subject: usb: musb: tusb6010: check return value after calling platform_get_resource()
X-Git-Tag: accepted/tizen/unified/20230118.172025~5097
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=06cfb4cb2241e704d72e3045cf4d7dfb567fbce0;p=platform%2Fkernel%2Flinux-rpi.git

usb: musb: tusb6010: check return value after calling platform_get_resource()

[ 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@huawei.com>
Link: https://lore.kernel.org/r/20210915034925.2399823-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index c968ecd..7ed4cc3 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -1104,6 +1104,11 @@ 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 */