From patchwork Fri Jun 30 06:28:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hariprasad Kelam X-Patchwork-Id: 13297653 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B00878BEA for ; Fri, 30 Jun 2023 06:29:09 +0000 (UTC) Received: from mx0b-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94C5E30C5; Thu, 29 Jun 2023 23:29:08 -0700 (PDT) Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 35U2CEYA013691; Thu, 29 Jun 2023 23:29:02 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=marvell.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=pfpt0220; bh=rWyzZqcmXgpWtJawATcjZRNO+M4ovmpNa6UwHV2ObrQ=; b=b7JXoL8B81QbYKXBfWLGenN1N9vFsjzCNyf7gXGBqvXnafMDiOTtO3W3Y4uJ/oDFVQYw u1gxkeLO6zR0yXnebDRxxYtBk1RYKvJF6PRMbBAZo1T/NFsTHvGiEuGMVTk1m84YWfcH x+1ArVT7ZM0ttiQ7jU/XtnogTjRE9vJDUpkuhojRRlDrEDhPWiEB+jJQRHvZhxy/cEEB RSiog1XjAS7uIrkr1csMaRuYHwklOWnqi6yyguLBSE6HBNlehaJRKpiHmHu/efGi7Xju DwMqsuLk7GKD0RZOHfioptyBRNO2PnFHY7gvdNDeI6Ho8vy56jJHHShQuG/HhZjf5ba8 Ug== Received: from dc5-exch02.marvell.com ([199.233.59.182]) by mx0a-0016f401.pphosted.com (PPS) with ESMTPS id 3rhp2egqtg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Thu, 29 Jun 2023 23:29:02 -0700 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by DC5-EXCH02.marvell.com (10.69.176.39) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Thu, 29 Jun 2023 23:29:00 -0700 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.48 via Frontend Transport; Thu, 29 Jun 2023 23:29:00 -0700 Received: from hyd1soter3.marvell.com (unknown [10.29.37.12]) by maili.marvell.com (Postfix) with ESMTP id E96FA3F707D; Thu, 29 Jun 2023 23:28:56 -0700 (PDT) From: Hariprasad Kelam To: , CC: , , , , , , , , Subject: [net Patch 3/4] octeontx2-af: Add validation before accessing cgx and lmac Date: Fri, 30 Jun 2023 11:58:44 +0530 Message-ID: <20230630062845.26606-4-hkelam@marvell.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230630062845.26606-1-hkelam@marvell.com> References: <20230630062845.26606-1-hkelam@marvell.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: KihpqnPpPuci-9vTPrLmHMojzsG8Mxhj X-Proofpoint-GUID: KihpqnPpPuci-9vTPrLmHMojzsG8Mxhj X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-30_03,2023-06-27_01,2023-05-22_02 X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org with the addition of new MAC blocks like CN10K RPM and CN10KB RPM_USX, LMACs are noncontiguous and CGX blocks are also noncontiguous. But during RVU driver initialization, the driver is assuming they are contiguous and trying to access cgx or lmac with their id which is resulting in kernel panic. This patch fixes the issue by adding proper checks. [ 23.219150] pc : cgx_lmac_read+0x38/0x70 [ 23.219154] lr : rvu_program_channels+0x3f0/0x498 [ 23.223852] sp : ffff000100d6fc80 [ 23.227158] x29: ffff000100d6fc80 x28: ffff00010009f880 x27: 000000000000005a [ 23.234288] x26: ffff000102586768 x25: 0000000000002500 x24: fffffffffff0f000 Fixes: 91c6945ea1f9 ("octeontx2-af: cn10k: Add RPM MAC support") Signed-off-by: Hariprasad Kelam Signed-off-by: Sunil Goutham Reviewed-by: Simon Horman --- drivers/net/ethernet/marvell/octeontx2/af/cgx.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c index bd77152bb8d7..f4bdca662d61 100644 --- a/drivers/net/ethernet/marvell/octeontx2/af/cgx.c +++ b/drivers/net/ethernet/marvell/octeontx2/af/cgx.c @@ -169,6 +169,9 @@ void cgx_lmac_write(int cgx_id, int lmac_id, u64 offset, u64 val) { struct cgx *cgx_dev = cgx_get_pdata(cgx_id); + /* Software must not access disabled LMAC registers */ + if (!is_lmac_valid(cgx_dev, lmac_id)) + return; cgx_write(cgx_dev, lmac_id, offset, val); } @@ -176,6 +179,10 @@ u64 cgx_lmac_read(int cgx_id, int lmac_id, u64 offset) { struct cgx *cgx_dev = cgx_get_pdata(cgx_id); + /* Software must not access disabled LMAC registers */ + if (!is_lmac_valid(cgx_dev, lmac_id)) + return 0; + return cgx_read(cgx_dev, lmac_id, offset); }