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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 B7C0BC3A5A8 for ; Wed, 4 Sep 2019 18:26:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8749B20870 for ; Wed, 4 Sep 2019 18:26:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567621584; bh=DKhQ2Ka0T+6bE1iWjHPMunDT9W+81VOX+TbTao7hZZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Obtj3phSsFiXUlU/gGcCljFLf3athJJJ5zYIOJV3clnaUZySupsA4XjL8CBKbiqKM /3U1Xe2LFUUIC0O9cN/ewT8dhF1xO+jNJj2DtvgwAz1hTYnZ6XK5zvKREp9Gmf8LJ4 7jhUNXHlOYz7zoLaL/zqaPzEsTV07DTM3kQY0av0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387997AbfIDR6L (ORCPT ); Wed, 4 Sep 2019 13:58:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:36530 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387991AbfIDR6K (ORCPT ); Wed, 4 Sep 2019 13:58:10 -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 270B322CED; Wed, 4 Sep 2019 17:58:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567619889; bh=DKhQ2Ka0T+6bE1iWjHPMunDT9W+81VOX+TbTao7hZZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ij8aw1wxN0Jz7wbV5LASxmYYQyjv/o/iLPVUJM1U7dEFZ0rYjz2iVNqQ60+KCHnkR 3+UuCwfwMSuEHdxT4Y33c0sFM4zBS/RJ4mrlVrgH7qWYIVH6gtVQSpqOm4gJnD5KAB OmWJPGRPHVc5LIg7N8HdTIs27dQDjXHLJ4+GDv2Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ding Xiang , Alexander Shishkin Subject: [PATCH 4.4 73/77] stm class: Fix a double free of stm_source_device Date: Wed, 4 Sep 2019 19:54:00 +0200 Message-Id: <20190904175310.160996505@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190904175303.317468926@linuxfoundation.org> References: <20190904175303.317468926@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 From: Ding Xiang commit 961b6ffe0e2c403b09a8efe4a2e986b3c415391a upstream. In the error path of stm_source_register_device(), the kfree is unnecessary, as the put_device() before it ends up calling stm_source_device_release() to free stm_source_device, leading to a double free at the outer kfree() call. Remove it. Signed-off-by: Ding Xiang Signed-off-by: Alexander Shishkin Fixes: 7bd1d4093c2fa ("stm class: Introduce an abstraction for System Trace Module devices") Link: https://lore.kernel.org/linux-arm-kernel/1563354988-23826-1-git-send-email-dingxiang@cmss.chinamobile.com/ Cc: stable@vger.kernel.org # v4.4+ Link: https://lore.kernel.org/r/20190821074955.3925-2-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/stm/core.c | 1 - 1 file changed, 1 deletion(-) --- a/drivers/hwtracing/stm/core.c +++ b/drivers/hwtracing/stm/core.c @@ -1020,7 +1020,6 @@ int stm_source_register_device(struct de err: put_device(&src->dev); - kfree(src); return err; }