[PATCH AUTOSEL 4.14 07/14] usb: host: ohci-tmio: check return value after calling platform_get_resource()

From: Sasha Levin
Date: Tue Nov 09 2021 - 17:42:12 EST


From: Yang Yingliang <yangyingliang@xxxxxxxxxx>

[ Upstream commit 9eff2b2e59fda25051ab36cd1cb5014661df657b ]

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211011134920.118477-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/usb/host/ohci-tmio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
index 0cf4b6dc89720..4c7846dc5eed1 100644
--- a/drivers/usb/host/ohci-tmio.c
+++ b/drivers/usb/host/ohci-tmio.c
@@ -199,7 +199,7 @@ static int ohci_hcd_tmio_drv_probe(struct platform_device *dev)
if (usb_disabled())
return -ENODEV;

- if (!cell)
+ if (!cell || !regs || !config || !sram)
return -EINVAL;

if (irq < 0)
--
2.33.0