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 4230DC433EF for ; Mon, 24 Jan 2022 19:04:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344896AbiAXTEY (ORCPT ); Mon, 24 Jan 2022 14:04:24 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:57298 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345206AbiAXS74 (ORCPT ); Mon, 24 Jan 2022 13:59:56 -0500 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 ams.source.kernel.org (Postfix) with ESMTPS id B707CB8121C; Mon, 24 Jan 2022 18:59:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6AE1C340E5; Mon, 24 Jan 2022 18:59:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643050794; bh=8+gCBx0g7+QE7u/fTFVaw7lf8xg7PIrSLStF9YpUgcY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xHKf48nyTKpw/plnmYAT6zNUOJeROWaddZQmsn9VnES2b0+MxEUWPIP2cpdIZlNfT 87wRhOtXh9bPkysGf7MUV0TGlP0bP8Oqk0WjAhi1TmVjSbQqK/HyLh3MXH3GS80ow+ pcT+y6y0Ga2knJ0ErF6xyoWvaWtBvLGnDpKRho54= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chengfeng Ye , Sebastian Reichel , Sasha Levin Subject: [PATCH 4.9 081/157] HSI: core: Fix return freed object in hsi_new_client Date: Mon, 24 Jan 2022 19:42:51 +0100 Message-Id: <20220124183935.354484686@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124183932.787526760@linuxfoundation.org> References: <20220124183932.787526760@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chengfeng Ye [ Upstream commit a1ee1c08fcd5af03187dcd41dcab12fd5b379555 ] cl is freed on error of calling device_register, but this object is return later, which will cause uaf issue. Fix it by return NULL on error. Signed-off-by: Chengfeng Ye Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin --- drivers/hsi/hsi_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/hsi/hsi_core.c b/drivers/hsi/hsi_core.c index e9d63b966caff..4a9fd745b8cb4 100644 --- a/drivers/hsi/hsi_core.c +++ b/drivers/hsi/hsi_core.c @@ -115,6 +115,7 @@ struct hsi_client *hsi_new_client(struct hsi_port *port, if (device_register(&cl->device) < 0) { pr_err("hsi: failed to register client: %s\n", info->name); put_device(&cl->device); + goto err; } return cl; -- 2.34.1