From patchwork Tue Nov 15 09:46:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Denis Arefev X-Patchwork-Id: 625402 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6050CC4332F for ; Tue, 15 Nov 2022 09:54:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238149AbiKOJyp (ORCPT ); Tue, 15 Nov 2022 04:54:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229911AbiKOJyn (ORCPT ); Tue, 15 Nov 2022 04:54:43 -0500 X-Greylist: delayed 491 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 15 Nov 2022 01:54:41 PST Received: from mx.swemel.ru (mx.swemel.ru [95.143.211.150]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A802A38B4; Tue, 15 Nov 2022 01:54:41 -0800 (PST) From: Denis Arefev DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=swemel.ru; s=mail; t=1668505589; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=NmmBGedzdtOQXgj14ZUnuEyKYV0y5hMfZTUePWXPEbw=; b=sCnrEURWR+mhGX/LBvib/yhHGHOmE4zVV2U/doO+IVBvQrtJncWxwXNCNNUrjtYNonMigQ 25UDg0jFSQy9FsokzFGug5hM05TlaLVgsvDQYVRVG03WeY4Ndn0Fpge0LBBHdNmuJR+UG6 IFkTwM3LAyK+D16v+pATt5G3w6PlBak= To: Karen Xie Cc: "James E.J. Bottomley" , "Martin K. Petersen" , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Alexey Khoroshilov , ldv-project@linuxtesting.org, trufanov@swemel.ru, vfh@swemel.ru Subject: [PATCH] cxgb4i : Added pointer check Date: Tue, 15 Nov 2022 12:46:29 +0300 Message-Id: <20221115094629.73591-1-arefev@swemel.ru> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Return value of a function 'alloc_wr' is dereferenced at cxgb4i.c:624 without checking for null, but it is usually checked for this function Signed-off-by: Denis Arefev --- drivers/scsi/cxgbi/cxgb4i/cxgb4i.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c index 2c3491528d42..40ed8e27945c 100644 --- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c +++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c @@ -611,7 +611,7 @@ static inline int tx_flowc_wr_credits(int *nparamsp, int *flowclenp) static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) { - struct sk_buff *skb; + struct sk_buff *skb = NULL; struct fw_flowc_wr *flowc; int nparams, flowclen16, flowclen; @@ -620,6 +620,8 @@ static inline int send_tx_flowc_wr(struct cxgbi_sock *csk) #endif flowclen16 = tx_flowc_wr_credits(&nparams, &flowclen); skb = alloc_wr(flowclen, 0, GFP_ATOMIC); + if (!skb) + return -ENOMEM; flowc = (struct fw_flowc_wr *)skb->head; flowc->op_to_nparams = htonl(FW_WR_OP_V(FW_FLOWC_WR) | FW_FLOWC_WR_NPARAMS_V(nparams));