From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4BCB4CA9EAF for ; Mon, 21 Oct 2019 12:12:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1DE9A20882 for ; Mon, 21 Oct 2019 12:12:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fEHnrnDL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1DE9A20882 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=the-dreams.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type:Cc: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=xYljGf6e6wN6XA6iA9yiP6o8NMoPP3KktP7jXZKYeWE=; b=fEHnrnDL1+RiCldAS0LS1xPFb Ce7R/84QpqUgru7pr0k7WT5OG5JwvLj5rjhQeRAIfYYaBLnb1c7dBKUQolCBxMFZTskOnYD/ns+he +BseLg98XvcBkh0+hQo6JHtwP2kdHHpYp5sAgxNEJt7CtvBtTnG93V+YvUKUgmvxPKirObrpEoGId EwC4YNTfJxYjaIwHHjdaB39vRozHTs9XZGE4wdrQbJZhm7j1brR9IJsh+l5vQBkWLtRuoGefNZTUY TVOSNl9U/BFxQb+mhB7MHA32jlbtADXfrKVcWH6fuPcuFwTHuaENAtKOu+dyBKU0nOQu6cEvyrJ+L pF/GbhuJA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMWYE-0003Vz-Jy; Mon, 21 Oct 2019 12:12:42 +0000 Received: from sauhun.de ([88.99.104.3] helo=pokefinder.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMWYB-0003VT-Hh; Mon, 21 Oct 2019 12:12:40 +0000 Received: from localhost (p54B33572.dip0.t-ipconnect.de [84.179.53.114]) by pokefinder.org (Postfix) with ESMTPSA id C6FD72C0076; Mon, 21 Oct 2019 14:12:38 +0200 (CEST) Date: Mon, 21 Oct 2019 14:12:38 +0200 From: Wolfram Sang To: Fabien Parent Subject: Re: [PATCH RESEND v2] i2c: i2c-mt65xx: fix NULL ptr dereference Message-ID: <20191021121238.GD1145@ninjato> References: <20191018173213.13282-1-fparent@baylibre.com> MIME-Version: 1.0 In-Reply-To: <20191018173213.13282-1-fparent@baylibre.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191021_051239_727883_AA54C2C5 X-CRM114-Status: GOOD ( 10.02 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ulrich Hecht , drinkcat@chromium.org, qii.wang@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-i2c@vger.kernel.org, hsinyi@chromium.org, matthias.bgg@gmail.com, Cengiz Can , tglx@linutronix.de, linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============5162781053311543480==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============5162781053311543480== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Ycz6tD7Th1CMF4v7" Content-Disposition: inline --Ycz6tD7Th1CMF4v7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Oct 18, 2019 at 07:32:13PM +0200, Fabien Parent wrote: > Since commit abf4923e97c3 ("i2c: mediatek: disable zero-length transfers > for mt8183"), there is a NULL pointer dereference for all the SoCs > that don't have any quirk. mtk_i2c_functionality is not checking that > the quirks pointer is not NULL before starting to use it. >=20 > This commit add a call to i2c_check_quirks which will check whether > the quirks pointer is set, and if so will check if the IP has the > NO_ZERO_LEN quirk. >=20 > Fixes: abf4923e97c3 ("i2c: mediatek: disable zero-length transfers for mt= 8183") > Signed-off-by: Fabien Parent > Reviewed-by: Cengiz Can > Reviewed-by: Hsin-Yi Wang > Tested-by: Ulrich Hecht >=20 Applied to for-current, thanks! 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