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=-8.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 8FA6EC48BE1 for ; Thu, 20 Jun 2019 18:01:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6DF562084A for ; Thu, 20 Jun 2019 18:01:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561053685; bh=eqKl0zvJukqapTrsVsf8Glo6wcBxzBGqmpgcdf9rP5E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EHO1lRqru710T/LKlspT4vXz9FQsUvUZNxPKRYMC0icWGHqIJcaGLfWC2u0hsfHnE wnyFmFZPsh4d82f1L7BAYuAg+RVDObIrwAvQgP/WXODQ2jpfHRGafegzvE8mcImsjk pumHVjzsoJxZ2iA503boTQWKandO5S/Hh8ERAkMQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726619AbfFTSBY (ORCPT ); Thu, 20 Jun 2019 14:01:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:50942 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727230AbfFTSBX (ORCPT ); Thu, 20 Jun 2019 14:01:23 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 3A4E72083B; Thu, 20 Jun 2019 18:01:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561053682; bh=eqKl0zvJukqapTrsVsf8Glo6wcBxzBGqmpgcdf9rP5E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=02o/49R0ZJB6Zqn5XsatdCxTHztvUVEPQ+ZTuysz5U36HQyVIrb4cwm74SERjOhPj rfakEpb/lkBs9ek4QaD6c9qPfWYssEzlbyXWtRPWodq5nft2mZpGbXFssrfeuf4+e5 BzA4yQa8UmPJFE0EffW1exicKfTlaBkiGHw0wpzE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yingjoe Chen , Wolfram Sang , Sasha Levin Subject: [PATCH 4.4 75/84] i2c: dev: fix potential memory leak in i2cdev_ioctl_rdwr Date: Thu, 20 Jun 2019 19:57:12 +0200 Message-Id: <20190620174348.846387719@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190620174337.538228162@linuxfoundation.org> References: <20190620174337.538228162@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit a0692f0eef91354b62c2b4c94954536536be5425 ] If I2C_M_RECV_LEN check failed, msgs[i].buf allocated by memdup_user will not be freed. Pump index up so it will be freed. Fixes: 838bfa6049fb ("i2c-dev: Add support for I2C_M_RECV_LEN") Signed-off-by: Yingjoe Chen Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/i2c-dev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index 57e3790c87b1..e56b774e7cf9 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -295,6 +295,7 @@ static noinline int i2cdev_ioctl_rdwr(struct i2c_client *client, rdwr_pa[i].buf[0] < 1 || rdwr_pa[i].len < rdwr_pa[i].buf[0] + I2C_SMBUS_BLOCK_MAX) { + i++; res = -EINVAL; break; } -- 2.20.1