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authorJohan Hovold <johan@kernel.org>2017-03-07 21:14:13 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2017-03-24 14:28:25 +0300
commit03eb2a557ed552e920a0942b774aaf931596eec1 (patch)
treefafd74d7b22bff187744e7f9aa649ad25fe099dc /drivers/media/rc/mceusb.c
parent74c839b2f5544fd77fdb34a99b577965d4812edf (diff)
downloadlinux-03eb2a557ed552e920a0942b774aaf931596eec1.tar.xz
[media] mceusb: fix NULL-deref at probe
Make sure to check for the required out endpoint to avoid dereferencing a NULL-pointer in mce_request_packet should a malicious device lack such an endpoint. Note that this path is hit during probe. Fixes: 66e89522aff7 ("V4L/DVB: IR: add mceusb IR receiver driver") Cc: stable <stable@vger.kernel.org> # 2.6.36 Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/rc/mceusb.c')
-rw-r--r--drivers/media/rc/mceusb.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index 238d8eaf7d94..93b16fe3ab38 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -1288,8 +1288,8 @@ static int mceusb_dev_probe(struct usb_interface *intf,
}
}
}
- if (ep_in == NULL) {
- dev_dbg(&intf->dev, "inbound and/or endpoint not found");
+ if (!ep_in || !ep_out) {
+ dev_dbg(&intf->dev, "required endpoints not found\n");
return -ENODEV;
}