From: Johan Hovold <johan@kernel.org>
Date: Tue, 3 Jan 2017 15:39:59 +0000 (+0100)
Subject: USB: serial: oti6858: fix NULL-deref at open
X-Git-Tag: v3.2.87~122
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=390eb6e1ca74cb6dd69bab39e2402f7922ab6dfe;p=pandora-kernel.git

USB: serial: oti6858: fix NULL-deref at open

commit 5afeef2366db14587b65558bbfd5a067542e07fb upstream.

Fix NULL-pointer dereference in open() should the device lack the
expected endpoints:

Unable to handle kernel NULL pointer dereference at virtual address 00000030
...
PC is at oti6858_open+0x30/0x1d0 [oti6858]

Note that a missing interrupt-in endpoint would have caused open() to
fail.

Fixes: 49cdee0ed0fc ("USB: oti6858 usb-serial driver (in Nokia CA-42
cable)")
Signed-off-by: Johan Hovold <johan@kernel.org>
[bwh: Backported to 3.2: add this check to the existing
 usb_serial_driver::attach implementation]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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