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=-6.8 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_GIT autolearn=unavailable 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 A3BFAC35247 for ; Mon, 3 Feb 2020 16:48:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7870E2051A for ; Mon, 3 Feb 2020 16:48:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580748517; bh=UteHNnpLt/O9YQ6oHAMfw8GJtA0rGXMaFuZvPNpQoR0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=uyh5jIOT0B9Dm2CKD/AkSyg2sKywUC2gPWFJn+QumneQf7zOqhCgtSJWOcR0iIsU2 ADMZ0M7oQ3Q6iWqLfLO5c+XdeNYb1Z03wMIPlY4PNEGrrJZ8NiWRp2iCtZ8A45BE2D sVH5qxFznfct1Y7HwPO6JBA+DjrRphfMOBZDhG1c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728917AbgBCQ0G (ORCPT ); Mon, 3 Feb 2020 11:26:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:36946 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728882AbgBCQ0D (ORCPT ); Mon, 3 Feb 2020 11:26:03 -0500 Received: from localhost (unknown [104.132.45.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A5A002080C; Mon, 3 Feb 2020 16:26:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580747162; bh=UteHNnpLt/O9YQ6oHAMfw8GJtA0rGXMaFuZvPNpQoR0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RwW46wH4oj+MabdomE9w58XUEX4YLjKkssxkMRSS6zsDeeKyWzXxd34D16B6XWGhR aSzmkXKRXXLYMEhXq6awDkx52zInMFe3gsmiXfR5LFW3cqPzlgxJqYk4/DR5N4pcBu TTPeRCvy8ufKBS5TFySKLAdReyxI8K+XRGZLMvm8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans Verkuil , Mauro Carvalho Chehab , syzbot+32310fc2aea76898d074@syzkaller.appspotmail.com, syzbot+99706d6390be1ac542a2@syzkaller.appspotmail.com, syzbot+64437af5c781a7f0e08e@syzkaller.appspotmail.com Subject: [PATCH 4.9 36/68] media: gspca: zero usb_buf Date: Mon, 3 Feb 2020 16:19:32 +0000 Message-Id: <20200203161910.889671568@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200203161904.705434837@linuxfoundation.org> References: <20200203161904.705434837@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hans Verkuil commit de89d0864f66c2a1b75becfdd6bf3793c07ce870 upstream. Allocate gspca_dev->usb_buf with kzalloc instead of kmalloc to ensure it is property zeroed. This fixes various syzbot errors about uninitialized data. Syzbot links: https://syzkaller.appspot.com/bug?extid=32310fc2aea76898d074 https://syzkaller.appspot.com/bug?extid=99706d6390be1ac542a2 https://syzkaller.appspot.com/bug?extid=64437af5c781a7f0e08e Reported-and-tested-by: syzbot+32310fc2aea76898d074@syzkaller.appspotmail.com Reported-and-tested-by: syzbot+99706d6390be1ac542a2@syzkaller.appspotmail.com Reported-and-tested-by: syzbot+64437af5c781a7f0e08e@syzkaller.appspotmail.com Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/usb/gspca/gspca.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/media/usb/gspca/gspca.c +++ b/drivers/media/usb/gspca/gspca.c @@ -2043,7 +2043,7 @@ int gspca_dev_probe2(struct usb_interfac pr_err("couldn't kzalloc gspca struct\n"); return -ENOMEM; } - gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); + gspca_dev->usb_buf = kzalloc(USB_BUF_SZ, GFP_KERNEL); if (!gspca_dev->usb_buf) { pr_err("out of memory\n"); ret = -ENOMEM;