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

From: Yang Yingliang
Date: Tue Sep 14 2021 - 23:44:16 EST


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>
---
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 c42937692207..e0347780907f 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -1103,6 +1103,11 @@ 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 */
--
2.25.1