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Miller" , Sasha Levin Subject: [PATCH AUTOSEL 4.4 13/17] s390/qeth: don't dump past end of unknown HW header Thread-Topic: [PATCH AUTOSEL 4.4 13/17] s390/qeth: don't dump past end of unknown HW header Thread-Index: AQHUWR9/5LExO6njw0+kapDw3T9Smg== Date: Mon, 1 Oct 2018 00:41:32 +0000 Message-ID: <20181001004122.147276-13-alexander.levin@microsoft.com> References: <20181001004122.147276-1-alexander.levin@microsoft.com> In-Reply-To: <20181001004122.147276-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;CY4PR21MB0791;6:NJi4rCE9RIQxtC+i2xbN8FCS8iDkL2JMgi3S6R52bPdAMy/TfpZEVrh/uJRPkul27WuWznnZo1dJwEIc6TY59HwP19JkHVKO79x/THuz+rEusPqKwbGkmcuJFdrn7kPIruiFX3G6bG3qazdjSntsz2XQHaRkGGoD54pzHZwtq38iYMfUxh/FOE5Gf6LxJve6+ybmLbGlCqOP3Kt43nMQ3ra7jwfpWpDpP/K+kK2GV/LWbpGk0l0l2+KracivCucqOJ/5ahqM3ERPj2RRNLv1RNf5WNwZOGmsfzRFOhp9TS/YaEvOg49SZO2v5MqQG6DD1t8ZlQ4+xgpwolSpgJGvHITMDg9rwdcZGQAqOm6/PUT33lUqWTjcetWASTGeoP6JqtUg39V6SIQpy5CtJ5GtwmbwLjicwFcVvhAN6yj4AggYkH6qwB6qvcw3WPp4eaOuBPOMDcyWFdwFhHGA5N9YKQ==;5:KOVmom8oDb658yCrc9O9K0+WFa2zLOUDb03ZtfXi8l6KUZUhNOKmYNV3qoOP315I/WNrCtGSn4frHMWkAJoI1kK15YEythjr8rwM/Bmx47jo5CoMAFqDmj+wRLJql++O6Zl+7dou3UheI/CYdZpEFZqFVSMdh4NSB0kb4fvJDr8=;7:Yl7rLX8T5O07xm2s4H6JUnBzYOJ/ye60AVSUk0Wsejelc1mUDoA5JiQyXA4rIn/VomOstAKe4EyERq6IvGSEHso5LU8Enpj4spbwdel/teDlpV++jKdgXU5Adt4/wiT0caGDFd4yWA/FuTxpBknikLpS/Jj7qDl6719B23y2wq5WaxF8r83VQvWHC2kTRGKfyrPlNyR4qMOBY1GoFk1/eBLrFscYHhws9Ey1feUO6/5cnDsNkKkMI9kAX0bqTgem x-ms-office365-filtering-correlation-id: e515201d-b4bc-4709-e636-08d62736a281 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0;PCL:0;RULEID:(7020095)(4652040)(8989299)(4534165)(4627221)(201703031133081)(201702281549075)(8990200)(5600074)(711020)(4618075)(2017052603328)(7193020);SRVR:CY4PR21MB0791; x-ms-traffictypediagnostic: CY4PR21MB0791: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(104084551191319)(28532068793085)(89211679590171); x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(6040522)(2401047)(5005006)(8121501046)(93006095)(93001095)(3231355)(944501410)(52105095)(2018427008)(10201501046)(3002001)(6055026)(149066)(150057)(6041310)(20161123558120)(20161123562045)(20161123564045)(20161123560045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(201708071742011)(7699051)(76991041);SRVR:CY4PR21MB0791;BCL:0;PCL:0;RULEID:;SRVR:CY4PR21MB0791; x-forefront-prvs: 0812095267 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(136003)(346002)(396003)(366004)(376002)(39860400002)(189003)(199004)(72206003)(71190400001)(478600001)(316002)(110136005)(14454004)(2616005)(54906003)(105586002)(107886003)(106356001)(186003)(305945005)(26005)(34290500001)(71200400001)(22452003)(7736002)(256004)(14444005)(25786009)(10290500003)(99286004)(68736007)(53936002)(486006)(6512007)(446003)(66066001)(36756003)(6506007)(81166006)(81156014)(6486002)(5250100002)(575784001)(86362001)(2501003)(5660300001)(4326008)(11346002)(6116002)(476003)(3846002)(10090500001)(97736004)(1076002)(8676002)(8936002)(102836004)(217873002)(6436002)(76176011)(86612001)(2900100001)(2906002);DIR:OUT;SFP:1102;SCL:1;SRVR:CY4PR21MB0791;H:CY4PR21MB0776.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: FGFAhqe2SyUy38f+J4eSxe4Xd7Hq93KfBfs+tNg3Pf2K9CdbwgPKcH7F9clCUgYJULDNdr6NQ4B3sH0MILMDiOvw5CoLtnsbGgoLSCC7XJbZAVLZDe7uoV9/DrJCj03y8fTraKEiNQcyw/3WE493UbioBiAZOLJMpflt6VbxJDCunUiF6sX4RPCjKhlfzITu9wSriMObpqrt1PM5oKSLTB/RXPT5crupy/VDAzqbGLrleJ3/gPhgR80gd9K+0k9mfBsorenRHRcy0Fpwkr4L2ZDfEpMGuH2YRNIP2PieuFWoloHW80zBZB1nay49sy3VTDrwcW386VXaAxZhhvud0P02GFVRREsDr4Rt7YBJKM4= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: e515201d-b4bc-4709-e636-08d62736a281 X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Oct 2018 00:41:32.6602 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR21MB0791 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Julian Wiedmann [ Upstream commit 0ac1487c4b2de383b91ecad1be561b8f7a2c15f4 ] For inbound data with an unsupported HW header format, only dump the actual HW header. We have no idea how much payload follows it, and what it contains. Worst case, we dump past the end of the Inbound Buffer and access whatever is located next in memory. Signed-off-by: Julian Wiedmann Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/s390/net/qeth_l2_main.c | 2 +- drivers/s390/net/qeth_l3_main.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_mai= n.c index acdb5ccb0ab9..34d3b7aff513 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -523,7 +523,7 @@ static int qeth_l2_process_inbound_buffer(struct qeth_c= ard *card, default: dev_kfree_skb_any(skb); QETH_CARD_TEXT(card, 3, "inbunkno"); - QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN); + QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr)); continue; } work_done++; diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_mai= n.c index bbdb3b6c54bb..2cc9bc1ef1e3 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -1902,7 +1902,7 @@ static int qeth_l3_process_inbound_buffer(struct qeth= _card *card, default: dev_kfree_skb_any(skb); QETH_CARD_TEXT(card, 3, "inbunkno"); - QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN); + QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr)); continue; } work_done++; --=20 2.17.1