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[68.61.232.219]) by smtp.gmail.com with ESMTPSA id f10sm7233182itf.41.2018.12.17.08.42.02 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Dec 2018 08:42:02 -0800 (PST) Received: from manet.1015granger.net (manet.1015granger.net [192.168.1.51]) by gateway.1015granger.net (8.14.7/8.14.7) with ESMTP id wBHGg1JE018669; Mon, 17 Dec 2018 16:42:01 GMT Subject: [PATCH v4 30/30] xprtrdma: Don't leak freed MRs From: Chuck Lever To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Date: Mon, 17 Dec 2018 11:42:01 -0500 Message-ID: <20181217164201.24133.618.stgit@manet.1015granger.net> In-Reply-To: <20181217162406.24133.27356.stgit@manet.1015granger.net> References: <20181217162406.24133.27356.stgit@manet.1015granger.net> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Defensive clean up. Don't set frwr->fr_mr until we know that the scatterlist allocation has succeeded. Signed-off-by: Chuck Lever --- net/sunrpc/xprtrdma/frwr_ops.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index 35c8f62..6a56105 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -155,36 +155,39 @@ void frwr_release_mr(struct rpcrdma_mr *mr) int frwr_init_mr(struct rpcrdma_ia *ia, struct rpcrdma_mr *mr) { unsigned int depth = ia->ri_max_frwr_depth; - struct rpcrdma_frwr *frwr = &mr->frwr; + struct scatterlist *sg; + struct ib_mr *frmr; int rc; - frwr->fr_mr = ib_alloc_mr(ia->ri_pd, ia->ri_mrtype, depth); - if (IS_ERR(frwr->fr_mr)) + frmr = ib_alloc_mr(ia->ri_pd, ia->ri_mrtype, depth); + if (IS_ERR(frmr)) goto out_mr_err; - mr->mr_sg = kcalloc(depth, sizeof(*mr->mr_sg), GFP_KERNEL); - if (!mr->mr_sg) + sg = kcalloc(depth, sizeof(*sg), GFP_KERNEL); + if (!sg) goto out_list_err; - frwr->fr_state = FRWR_IS_INVALID; + mr->frwr.fr_mr = frmr; + mr->frwr.fr_state = FRWR_IS_INVALID; mr->mr_dir = DMA_NONE; INIT_LIST_HEAD(&mr->mr_list); INIT_WORK(&mr->mr_recycle, frwr_mr_recycle_worker); - sg_init_table(mr->mr_sg, depth); - init_completion(&frwr->fr_linv_done); + init_completion(&mr->frwr.fr_linv_done); + + sg_init_table(sg, depth); + mr->mr_sg = sg; return 0; out_mr_err: - rc = PTR_ERR(frwr->fr_mr); + rc = PTR_ERR(frmr); trace_xprtrdma_frwr_alloc(mr, rc); return rc; out_list_err: - rc = -ENOMEM; dprintk("RPC: %s: sg allocation failure\n", __func__); - ib_dereg_mr(frwr->fr_mr); - return rc; + ib_dereg_mr(frmr); + return -ENOMEM; } /**