From patchwork Sun Aug 22 13:43:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "F.A.Sulaiman" X-Patchwork-Id: 501443 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT 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 46A0DC4338F for ; Sun, 22 Aug 2021 13:43:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 16B7261262 for ; Sun, 22 Aug 2021 13:43:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231907AbhHVNo3 (ORCPT ); Sun, 22 Aug 2021 09:44:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230495AbhHVNo2 (ORCPT ); Sun, 22 Aug 2021 09:44:28 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1B4AC061575 for ; Sun, 22 Aug 2021 06:43:46 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id e15so8609293plh.8 for ; Sun, 22 Aug 2021 06:43:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=itfac-mrt-ac-lk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=r1Enw6eKYLeGW0q6ReZjdVeghYydNYSv2C3y3Z0cpkM=; b=NSo9ngLhucEUmwdAMxx6cuXU6f2BurZbvDGjfAT3Tv9nWJvGDx+Ds5wF9qtRDvNClM mN6ZCzFmmqqOmBgA0Hhz4rU7AOX1wGdELmKauwjcu6CVYvlq9Fk+PI33BEk/a8E1RGiA Oq8E+OM5yEXo7yJoEnI0ZFRhjgdTJdR3NCneKWPPPBCgerl95qLVv96J8LpaTdyl5hcl qr7Q5XAy3rRP5gGxmpFuzyfP7eCFyhH6UTCHcVZyE0OPViMapsHXS/gIR2DgUuuzpoL7 tK3bL63mIMsvm7doOWAHSPpr5VGptxaZlyp/7JzEIg8unXkFoZxqfo41P88B9bwNAOqR 1TEA== 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; bh=r1Enw6eKYLeGW0q6ReZjdVeghYydNYSv2C3y3Z0cpkM=; b=hPFKqORpg1awRL3+smHsxR30qaBsgKGYyLv3TjGAon7AZcG8uiL/ffBRdKm1LMPcAH GPoNKw/kYItgTs/v4EZ+fyCiLg53kUYjg74000gLOrQA2e5MlAm0BBqvYveciEm+7aSW OUbthrK3sKk6YVjG0p8XS94sPlpFpND5kjPb1uuvGplo6Zy58VM4lvrrLmXWELs2wndo 2amvd3c9DTDvxxMNusZNXWLgPQ2UVymU16i1kQaMSIdH2MCvNkYD+o9kytEt8xXE8mLt nZ5Bq8VOkl4ZJoYlRyfzHQQJcom2US4ig7WwTg+HqGDx30kuKjq4GMwXjAf4ddJZFRIW 44aw== X-Gm-Message-State: AOAM533g7PVhJ+yIDtCi7LeBLt/1Wgi46QQPO83TVhB6thyRzc86N+HB hlqno3enCdSSu5pAauu28SJU X-Google-Smtp-Source: ABdhPJwqYkottPCIqJX23CCHTUq+6WgHNDI7zo0sXHcXtSxT0lWbxtbrjQo8Iu1JRnmnLyN9nt4giQ== X-Received: by 2002:a17:902:8c83:b029:129:17e5:a1cc with SMTP id t3-20020a1709028c83b029012917e5a1ccmr24343549plo.49.1629639826358; Sun, 22 Aug 2021 06:43:46 -0700 (PDT) Received: from localhost.localdomain ([123.231.122.209]) by smtp.gmail.com with ESMTPSA id g26sm15106581pgb.45.2021.08.22.06.43.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Aug 2021 06:43:46 -0700 (PDT) From: "F.A.Sulaiman" To: jikos@kernel.org, benjamin.tissoires@redhat.com Cc: "F.A.Sulaiman" , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, paskripkin@gmail.com Subject: [PATCH v2] HID: betop: fix slab-out-of-bounds Write in betop_probe Date: Sun, 22 Aug 2021 19:13:19 +0530 Message-Id: <20210822134319.3738-1-asha.16@itfac.mrt.ac.lk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210816201544.26405-1-asha.16@itfac.mrt.ac.lk> References: <20210816201544.26405-1-asha.16@itfac.mrt.ac.lk> Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Syzbot reported slab-out-of-bounds Write bug in hid-betopff driver. The problem is the driver assumes the device must have an input report but some malicious devices violate this assumption. So this patch checks hid_device's input is non empty before it's been used. Reported-by: syzbot+07efed3bc5a1407bd742@syzkaller.appspotmail.com Signed-off-by: F.A. SULAIMAN --- drivers/hid/hid-betopff.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/hid/hid-betopff.c b/drivers/hid/hid-betopff.c index 0790fbd3fc9a..2d62bde21413 100644 --- a/drivers/hid/hid-betopff.c +++ b/drivers/hid/hid-betopff.c @@ -116,6 +116,11 @@ static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; + if (list_empty(&hdev->inputs)) { + hid_err(hdev, "no inputs found\n"); + return -ENODEV; + } + if (id->driver_data) hdev->quirks |= HID_QUIRK_MULTI_INPUT;