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,USER_AGENT_GIT autolearn=unavailable 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 23206C33CAF for ; Thu, 16 Jan 2020 17:24:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D852824684 for ; Thu, 16 Jan 2020 17:24:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579195468; bh=dzy2KhL75lDoksND+HhzTxU0ZmtY+fAKEeJElGLiyFQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=STwyunyqmH7V7F05mLxa5ZxHP44VEFyiKa0QNcpuXYkAO3YpLz2RT3VrfAm3HkokC zML43V94wxjgpfusEYFRdRtnot4b+75uTuUYbRICo+ynSbnMe9kMg66AdF8Ktqw2pF XtElX1hgzvmVxepnou5wWqRg/DwvKhOTzMS1DrR0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391760AbgAPRY0 (ORCPT ); Thu, 16 Jan 2020 12:24:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:58798 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391748AbgAPRYY (ORCPT ); Thu, 16 Jan 2020 12:24:24 -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 B6DA324690; Thu, 16 Jan 2020 17:24:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579195463; bh=dzy2KhL75lDoksND+HhzTxU0ZmtY+fAKEeJElGLiyFQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JXNqFbhqzN6N2aMhQVIA3PLsNCnEHKTkCvjvDmX7WRK7bUNVfNbcb5cHreVdxl2IT axasoSPsEwdih+zcp23EVd3hLKDnUDShXaud6dGX/NOfOvc9974Zgb/DT3gw269vcb keHR3zqAV6XC7wI5N9WSOkl98+3d8bHxeE9rhRBY= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Liu Jian , Hamish Martin , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL 4.14 071/371] driver: uio: fix possible memory leak in __uio_register_device Date: Thu, 16 Jan 2020 12:19:03 -0500 Message-Id: <20200116172403.18149-14-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116172403.18149-1-sashal@kernel.org> References: <20200116172403.18149-1-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: Liu Jian [ Upstream commit 1a392b3de7c5747506b38fc14b2e79977d3c7770 ] 'idev' is malloced in __uio_register_device() and leak free it before leaving from the uio_get_minor() error handing case, it will cause memory leak. Fixes: a93e7b331568 ("uio: Prevent device destruction while fds are open") Signed-off-by: Liu Jian Reviewed-by: Hamish Martin Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/uio/uio.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index fb5c9701b1fb..4e9b0ff79b13 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -939,8 +939,10 @@ int __uio_register_device(struct module *owner, atomic_set(&idev->event, 0); ret = uio_get_minor(idev); - if (ret) + if (ret) { + kfree(idev); return ret; + } idev->dev.devt = MKDEV(uio_major, idev->minor); idev->dev.class = &uio_class; -- 2.20.1