From patchwork Wed Oct 14 17:43:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Karsten Graul X-Patchwork-Id: 269993 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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,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 60D2CC433DF for ; Wed, 14 Oct 2020 17:43:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F04482072C for ; Wed, 14 Oct 2020 17:43:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="ftOheAfO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727819AbgJNRnz (ORCPT ); Wed, 14 Oct 2020 13:43:55 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:14000 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726903AbgJNRny (ORCPT ); Wed, 14 Oct 2020 13:43:54 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 09EHacm9044171; Wed, 14 Oct 2020 13:43:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=pp1; bh=jjyulqcpxlMPbqXd6zWSDFg6RCOZJO1mm6tP1lvXPdE=; b=ftOheAfOptlfJlia3WKyfYB4hVdTNpKl47E9CTnuaG0m1h9l0mjuj5BdIlragqptCQ9k RBWoqJLV/LcrbpOLOknpbUELfTkUzNrRC8SUftfE27XXGVgwZwzpcF3P4f8Vb6x3yDoV lNyIICdhOIgtvlTGsPrr71goAMhCSyGlxczPaBFGIH1Wkb2WFWrPwDYhMt+U0GZ+0IU4 DGs554JSBF4cqyvBO9S5NT3hJlJRBlt18DRqBEYlfOAMGVnaT67k7WdoZ+dOzdnnEdir iGsJTL3TcmX4LzfD19y6kQOrAspWhQ5GJYb9RsVhn69GyijzUH0aMS+IwoNXOUrj8EEf rg== Received: from ppma01fra.de.ibm.com (46.49.7a9f.ip4.static.sl-reverse.com [159.122.73.70]) by mx0b-001b2d01.pphosted.com with ESMTP id 3465nq0n00-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 14 Oct 2020 13:43:52 -0400 Received: from pps.filterd (ppma01fra.de.ibm.com [127.0.0.1]) by ppma01fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 09EHg16G013475; Wed, 14 Oct 2020 17:43:50 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma01fra.de.ibm.com with ESMTP id 344558sn4c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 14 Oct 2020 17:43:50 +0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 09EHhll033423830 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 14 Oct 2020 17:43:47 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 81C0652050; Wed, 14 Oct 2020 17:43:47 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 394525204F; Wed, 14 Oct 2020 17:43:47 +0000 (GMT) From: Karsten Graul To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com, raspl@linux.ibm.com, ubraun@linux.ibm.com Subject: [PATCH net 3/3] net/smc: fix invalid return code in smcd_new_buf_create() Date: Wed, 14 Oct 2020 19:43:29 +0200 Message-Id: <20201014174329.35791-4-kgraul@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201014174329.35791-1-kgraul@linux.ibm.com> References: <20201014174329.35791-1-kgraul@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-10-14_09:2020-10-14,2020-10-14 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 phishscore=0 impostorscore=0 malwarescore=0 mlxscore=0 spamscore=0 adultscore=0 suspectscore=1 bulkscore=0 clxscore=1015 mlxlogscore=999 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010140122 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org smc_ism_register_dmb() returns error codes set by the ISM driver which are not guaranteed to be negative or in the errno range. Such values would not be handled by ERR_PTR() and finally the return code will be used as a memory address. Fix that by using a valid negative errno value with ERR_PTR(). Fixes: 72b7f6c48708 ("net/smc: unique reason code for exceeded max dmb count") Signed-off-by: Karsten Graul --- net/smc/smc_core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c index 5de637472a11..d790c43c473f 100644 --- a/net/smc/smc_core.c +++ b/net/smc/smc_core.c @@ -1615,7 +1615,8 @@ static struct smc_buf_desc *smcd_new_buf_create(struct smc_link_group *lgr, rc = smc_ism_register_dmb(lgr, bufsize, buf_desc); if (rc) { kfree(buf_desc); - return (rc == -ENOMEM) ? ERR_PTR(-EAGAIN) : ERR_PTR(rc); + return (rc == -ENOMEM) ? ERR_PTR(-EAGAIN) : + ERR_PTR(-EIO); } buf_desc->pages = virt_to_page(buf_desc->cpu_addr); /* CDC header stored in buf. So, pretend it was smaller */