Add missing endpoint sanity check to probe in order to prevent a
NULL-pointer dereference (or slab out-of-bounds access) when retrieving
the interrupt-endpoint bInterval on ndo_open() in case a device lacks
the expected endpoints.
Fixes: 40a82917b1d3 ("net/usb/r8152: enable interrupt transfer")
Cc: hayeswang <hayeswang@xxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
drivers/net/usb/r8152.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index c5ebf35d2488..031cb8fff909 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -6597,6 +6597,9 @@ static int rtl8152_probe(struct usb_interface *intf,
return -ENODEV;
}
+ if (intf->cur_altsetting->desc.bNumEndpoints < 3)
+ return -ENODEV;
+
usb_reset_device(udev);
netdev = alloc_etherdev(sizeof(struct r8152));
if (!netdev) {
--
2.24.1
