From patchwork Fri Jan 3 16:35:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 11317023 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2A38E1395 for ; Fri, 3 Jan 2020 16:35:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0983424653 for ; Fri, 3 Jan 2020 16:35:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578069337; bh=kjrgtrC2p5Ze8muSZDjMpTFZ6AR3yll5W1vZFaxFI9E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=q3rfFn7FfR2cj7q6V2ZvRKysJM8ZO3ey30zvAJEySk2zcYf9thnQhhtEapyjRHCay OYyDKr9kvICMkWT/hmCjGcl0+5839DZHypqZcOyUmqu5IC62/3w0DOSYLzRwdRM+VO GfFCVqeUF2Rj6t5VKZITae/bQNNEllcYhxC2Gb1g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728069AbgACQff (ORCPT ); Fri, 3 Jan 2020 11:35:35 -0500 Received: from mail-lf1-f65.google.com ([209.85.167.65]:36873 "EHLO mail-lf1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727980AbgACQfe (ORCPT ); Fri, 3 Jan 2020 11:35:34 -0500 Received: by mail-lf1-f65.google.com with SMTP id b15so32230161lfc.4; Fri, 03 Jan 2020 08:35:32 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=t2rl7ZcqsXYCGxJFsJJzURnWZhFxN2ZAlltA2Ev3mU0=; b=AmWBVvo5Xq/2tBHD+L2G9q7NB990zlGpdF0heX3OEKuI6aiLDMh2z2JVI/L0nEMVK3 KkrK/6ySm9rfgvHtkwERWvbJ7bztIXXVYG7mkv6mTiS7Up4BYptrAzAdkCefsF9I3q8Y to+5oQDwJKSYBimKztPlEFR7pKz6qcas6gpqtnw013FHeTptkMOvCQNjUhQ5v3T2YM69 85i0pPBoVoOK7Bt8BXCty33Ue9Rp1GihxumDiGaAsdpGkN3sAZQnDjaLIJGPcp8gA61q VIWw8bdaqs5w4L9szqA+lzq4k6dMhjLtbK/yA1TCYflM0BOFvC/nYjF9GXjNpSbkpqL6 p0ZA== X-Gm-Message-State: APjAAAUZ5uCbLx/Uu2lNKU8jLWQli+AFzCHEtn28xTZkvc0enyV2Zuoo zwwo2NVH0sgOv1qSkuqC4CXCxYPA X-Google-Smtp-Source: APXvYqwfQMiwtQBYqyr/l2m2RgF1Ki6vgIfhw+bV7PYO3ca3nP4scEMNOH8ETfGDb0vV1FuNaILXpw== X-Received: by 2002:ac2:5147:: with SMTP id q7mr50425117lfd.87.1578069332135; Fri, 03 Jan 2020 08:35:32 -0800 (PST) Received: from xi.terra (c-14b8e655.07-184-6d6c6d4.bbcust.telenor.se. [85.230.184.20]) by smtp.gmail.com with ESMTPSA id d20sm24857445lfm.32.2020.01.03.08.35.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Jan 2020 08:35:30 -0800 (PST) Received: from johan by xi.terra with local (Exim 4.92.3) (envelope-from ) id 1inPvB-0000Kj-3W; Fri, 03 Jan 2020 17:35:33 +0100 From: Johan Hovold To: Mauro Carvalho Chehab Cc: Sean Young , Hans Verkuil , linux-media@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , Oliver Neukum , stable Subject: [PATCH 1/6] media: flexcop-usb: fix endpoint sanity check Date: Fri, 3 Jan 2020 17:35:08 +0100 Message-Id: <20200103163513.1229-2-johan@kernel.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200103163513.1229-1-johan@kernel.org> References: <20200103163513.1229-1-johan@kernel.org> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org A recent commit added an endpoint sanity check to address a NULL-pointer dereference on probe. Unfortunately the check was done on the current altsetting which was later changed. Fix this by moving the sanity check to after the altsetting is changed. Fixes: 1b976fc6d684 ("media: b2c2-flexcop-usb: add sanity checking") Cc: Oliver Neukum Cc: stable Signed-off-by: Johan Hovold --- drivers/media/usb/b2c2/flexcop-usb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/b2c2/flexcop-usb.c b/drivers/media/usb/b2c2/flexcop-usb.c index 039963a7765b..198ddfb8d2b1 100644 --- a/drivers/media/usb/b2c2/flexcop-usb.c +++ b/drivers/media/usb/b2c2/flexcop-usb.c @@ -511,6 +511,9 @@ static int flexcop_usb_init(struct flexcop_usb *fc_usb) return ret; } + if (fc_usb->uintf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + switch (fc_usb->udev->speed) { case USB_SPEED_LOW: err("cannot handle USB speed because it is too slow."); @@ -544,9 +547,6 @@ 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;