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Groups > linux.kernel > #1316593
| From | Jiri Slaby <jslaby@suse.cz> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.12 13/39] Input: aiptek - fix crash on detecting device without endpoints |
| Date | 2016-01-25 13:10 +0100 |
| Message-ID | <qUO82-3Gp-23@gated-at.bofh.it> (permalink) |
| References | <qUNYl-3kJ-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Vladis Dronov <vdronov@redhat.com>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 8e20cf2bce122ce9262d6034ee5d5b76fbb92f96 upstream.
The aiptek driver crashes in aiptek_probe() when a specially crafted USB
device without endpoints is detected. This fix adds a check that the device
has proper configuration expected by the driver. Also an error return value
is changed to more matching one in one of the error paths.
Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/input/tablet/aiptek.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index ee83c3904ee8..fcf9aa1eb167 100644
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -1820,6 +1820,14 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
input_set_abs_params(inputdev, ABS_TILT_Y, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0);
+ /* Verify that a device really has an endpoint */
+ if (intf->altsetting[0].desc.bNumEndpoints < 1) {
+ dev_err(&intf->dev,
+ "interface has %d endpoints, but must have minimum 1\n",
+ intf->altsetting[0].desc.bNumEndpoints);
+ err = -EINVAL;
+ goto fail3;
+ }
endpoint = &intf->altsetting[0].endpoint[0].desc;
/* Go set up our URB, which is called when the tablet receives
@@ -1862,6 +1870,7 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
if (i == ARRAY_SIZE(speeds)) {
dev_info(&intf->dev,
"Aiptek tried all speeds, no sane response\n");
+ err = -EINVAL;
goto fail3;
}
--
2.7.0
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