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Message-Id: <20191219183220.650160944@linuxfoundation.org>
Date: Thu, 19 Dec 2019 19:33:06 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Johan Hovold <johan@...nel.org>
Subject: [PATCH 4.9 104/199] staging: gigaset: add endpoint-type sanity check
From: Johan Hovold <johan@...nel.org>
commit ed9ed5a89acba51b82bdff61144d4e4a4245ec8a upstream.
Add missing endpoint-type sanity checks to probe.
This specifically prevents a warning in USB core on URB submission when
fuzzing USB descriptors.
Signed-off-by: Johan Hovold <johan@...nel.org>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20191202085610.12719-4-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/isdn/gigaset/usb-gigaset.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -708,6 +708,12 @@ static int gigaset_probe(struct usb_inte
endpoint = &hostif->endpoint[0].desc;
+ if (!usb_endpoint_is_bulk_out(endpoint)) {
+ dev_err(&interface->dev, "missing bulk-out endpoint\n");
+ retval = -ENODEV;
+ goto error;
+ }
+
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
ucs->bulk_out_size = buffer_size;
ucs->bulk_out_epnum = usb_endpoint_num(endpoint);
@@ -727,6 +733,12 @@ static int gigaset_probe(struct usb_inte
endpoint = &hostif->endpoint[1].desc;
+ if (!usb_endpoint_is_int_in(endpoint)) {
+ dev_err(&interface->dev, "missing int-in endpoint\n");
+ retval = -ENODEV;
+ goto error;
+ }
+
ucs->busy = 0;
ucs->read_urb = usb_alloc_urb(0, GFP_KERNEL);
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