From patchwork Thu Jul 15 18:38:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 478223 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 27459C636C9 for ; Thu, 15 Jul 2021 18:50:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1086F613D7 for ; Thu, 15 Jul 2021 18:50:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240596AbhGOSxV (ORCPT ); Thu, 15 Jul 2021 14:53:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:55914 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239831AbhGOSws (ORCPT ); Thu, 15 Jul 2021 14:52:48 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3052C613D9; Thu, 15 Jul 2021 18:49:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626374994; bh=YG0qm79BroaI6CylnQisfmeMk0+lZCDIprASKU7iuVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kY2rXex2LS47ZeLTsfscP3XjO03S9oSSlbONiXrkcD1nnTUPfh44S1WfkFqGMaBx1 /t7DgBT+ogy1HLIIyFrUEWxPdQApvem0uQO473HXgTNVqDWVacQmJpGZx8cSU5ZNLT y9pejqJFfnqMSHcT3q4eyawtEMV0cImGxJhzyVCc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Gerd Rausch , Jason Gunthorpe , Sasha Levin Subject: [PATCH 5.10 115/215] RDMA/cma: Fix rdma_resolve_route() memory leak Date: Thu, 15 Jul 2021 20:38:07 +0200 Message-Id: <20210715182619.899457746@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210715182558.381078833@linuxfoundation.org> References: <20210715182558.381078833@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Gerd Rausch [ Upstream commit 74f160ead74bfe5f2b38afb4fcf86189f9ff40c9 ] Fix a memory leak when "mda_resolve_route() is called more than once on the same "rdma_cm_id". This is possible if cma_query_handler() triggers the RDMA_CM_EVENT_ROUTE_ERROR flow which puts the state machine back and allows rdma_resolve_route() to be called again. Link: https://lore.kernel.org/r/f6662b7b-bdb7-2706-1e12-47c61d3474b6@oracle.com Signed-off-by: Gerd Rausch Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/core/cma.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 0c879e40bd18..34b94e525390 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -2793,7 +2793,8 @@ static int cma_resolve_ib_route(struct rdma_id_private *id_priv, cma_init_resolve_route_work(work, id_priv); - route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); + if (!route->path_rec) + route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL); if (!route->path_rec) { ret = -ENOMEM; goto err1;