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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 259E6C43215 for ; Fri, 22 Nov 2019 19:49:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E6452207DD for ; Fri, 22 Nov 2019 19:49:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574452176; bh=Qcp/95hKgiUmF3weNB1n/j5vx2wAk9FNB3Kh8AoxmL0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=im1SE+ROxODW3D0DhkvkjPZ6rTglEuk73xoZxuEfSJwGqGkxMNuLUIBOqi4YWwne2 S4lYOBQupRu37VdHxXGQlM34/oIPzVdKPTM9z6oQ+/WuGzb4I+eAVxBS3HhyIGDsCg 3kqCJR5eZWhyTMg0Cp+9TFh02uUQ7t9gJOasw0gE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727466AbfKVTte (ORCPT ); Fri, 22 Nov 2019 14:49:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:49152 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727416AbfKVTt2 (ORCPT ); Fri, 22 Nov 2019 14:49:28 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 02E6D20748; Fri, 22 Nov 2019 19:49:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574452167; bh=Qcp/95hKgiUmF3weNB1n/j5vx2wAk9FNB3Kh8AoxmL0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M8ZDldT0QigIUuH8h32N3/foquOzirJHYLRSMEz0ibjaE76u5s+jJf9bAV7KqqDwm /X/CWG10Dhz4tZ2vxOxD9Gwj2QA89OLmgg8l8dN6swCYeD+jPXG6wd/1FdmWZ/ENAF ReEsV8duCOEr6bzE2Dke7FWX3KtviR4pwH4crU64= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wen Yang , Wolfram Sang , Sasha Levin , linux-i2c@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 23/25] i2c: core: fix use after free in of_i2c_notify Date: Fri, 22 Nov 2019 14:48:56 -0500 Message-Id: <20191122194859.24508-23-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191122194859.24508-1-sashal@kernel.org> References: <20191122194859.24508-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wen Yang [ Upstream commit a4c2fec16f5e6a5fee4865e6e0e91e2bc2d10f37 ] We can't use "adap->dev" after it has been freed. Fixes: 5bf4fa7daea6 ("i2c: break out OF support into separate file") Signed-off-by: Wen Yang Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/i2c-core-of.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c index 0f01cdba9d2c6..14d4884996968 100644 --- a/drivers/i2c/i2c-core-of.c +++ b/drivers/i2c/i2c-core-of.c @@ -253,14 +253,14 @@ static int of_i2c_notify(struct notifier_block *nb, unsigned long action, } client = of_i2c_register_device(adap, rd->dn); - put_device(&adap->dev); - if (IS_ERR(client)) { dev_err(&adap->dev, "failed to create client for '%pOF'\n", rd->dn); + put_device(&adap->dev); of_node_clear_flag(rd->dn, OF_POPULATED); return notifier_from_errno(PTR_ERR(client)); } + put_device(&adap->dev); break; case OF_RECONFIG_CHANGE_REMOVE: /* already depopulated? */ -- 2.20.1