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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0388C38A06 for ; Mon, 30 May 2022 14:37:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242432AbiE3OhD (ORCPT ); Mon, 30 May 2022 10:37:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242126AbiE3OSY (ORCPT ); Mon, 30 May 2022 10:18:24 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80339A339C; Mon, 30 May 2022 06:49:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D93C36102F; Mon, 30 May 2022 13:48:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 36A8AC3411A; Mon, 30 May 2022 13:48:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1653918506; bh=7jqS2tTlnNZbrQ98eK9OJ7pRMtBHKuwDuhlgk5Xc4Sk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aFNNv2em0PARWRnwA7FUzBG2ekc4MGVAp4Hb4ciBpZfodSY0Q5w5jonZTlXXaMy/6 oMQkNxxcxKet1LaYBhDSrobgspdyWB6mOVBVHX5L1TVj5DqOcWzNofQwFu7JvAvoX3 cUpEAto+SWA9kaKtwHYQzE+bwrDGnoo8gKaOL78NuZI3cOf5LxNSpJgP5auiR0PR4w uct8PIiIUl88hQv7zg4Goq5NBdmqOdgDq7wCOCsDsN0luUKXtrM/isMQpPQR0UmSH1 Xun6292YOKVKxF11Hl9oDV014vw/1n8vaht2oX5Gd15GzITp5afYekDvm7DTh8lCPc iqPcaZbAD0Gow== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dongliang Mu , syzkaller , Jiri Kosina , Sasha Levin , jikos@kernel.org, benjamin.tissoires@redhat.com, linux-input@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 32/55] HID: bigben: fix slab-out-of-bounds Write in bigben_probe Date: Mon, 30 May 2022 09:46:38 -0400 Message-Id: <20220530134701.1935933-32-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220530134701.1935933-1-sashal@kernel.org> References: <20220530134701.1935933-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dongliang Mu [ Upstream commit fc4ef9d5724973193bfa5ebed181dba6de3a56db ] There is a slab-out-of-bounds Write bug in hid-bigbenff driver. The problem is the driver assumes the device must have an input but some malicious devices violate this assumption. Fix this by checking hid_device's input is non-empty before its usage. Reported-by: syzkaller Signed-off-by: Dongliang Mu Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin --- drivers/hid/hid-bigbenff.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/hid/hid-bigbenff.c b/drivers/hid/hid-bigbenff.c index 74ad8bf98bfd..e8c5e3ac9fff 100644 --- a/drivers/hid/hid-bigbenff.c +++ b/drivers/hid/hid-bigbenff.c @@ -347,6 +347,12 @@ static int bigben_probe(struct hid_device *hid, bigben->report = list_entry(report_list->next, struct hid_report, list); + if (list_empty(&hid->inputs)) { + hid_err(hid, "no inputs found\n"); + error = -ENODEV; + goto error_hw_stop; + } + hidinput = list_first_entry(&hid->inputs, struct hid_input, list); set_bit(FF_RUMBLE, hidinput->input->ffbit); -- 2.35.1