From patchwork Tue Jul 30 09:23:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oliver Neukum X-Patchwork-Id: 57785 X-Patchwork-Delegate: sean@mess.org Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hsOMR-0002Mg-SD; Tue, 30 Jul 2019 09:24:00 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731007AbfG3JX6 (ORCPT + 1 other); Tue, 30 Jul 2019 05:23:58 -0400 Received: from mx2.suse.de ([195.135.220.15]:58738 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730257AbfG3JX5 (ORCPT ); Tue, 30 Jul 2019 05:23:57 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 6D4BAAE34; Tue, 30 Jul 2019 09:23:56 +0000 (UTC) From: Oliver Neukum To: patrick.boettcher@posteo.de, mchehab@kernel.org, linux-media@vger.kernel.org Cc: Oliver Neukum Subject: [PATCH] b2c2-flexcop-usb: add sanity checking Date: Tue, 30 Jul 2019 11:23:46 +0200 Message-Id: <20190730092346.15520-1-oneukum@suse.com> X-Mailer: git-send-email 2.16.4 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The driver needs an isochronous endpoint to be present. It will oops in its absence. Add checking for it. Reported-by: syzbot+d93dff37e6a89431c158@syzkaller.appspotmail.com Signed-off-by: Oliver Neukum --- drivers/media/usb/b2c2/flexcop-usb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/usb/b2c2/flexcop-usb.c b/drivers/media/usb/b2c2/flexcop-usb.c index 1826ff825c2e..1a801dc286f8 100644 --- a/drivers/media/usb/b2c2/flexcop-usb.c +++ b/drivers/media/usb/b2c2/flexcop-usb.c @@ -538,6 +538,9 @@ static int flexcop_usb_probe(struct usb_interface *intf, struct flexcop_device *fc = NULL; int ret; + if (intf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) { err("out of memory\n"); return -ENOMEM;