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GET /api/1.1/patches/2230077/?format=api
{ "id": 2230077, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230077/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260429074232.180528-1-larysa.zaremba@intel.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/1.1/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260429074232.180528-1-larysa.zaremba@intel.com>", "date": "2026-04-29T07:42:30", "name": "[iwl-net] idpf: fix RSS LUT memcpy size", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c335df7fe5bb7fdc0639a0d9e9e8b90bce3fc927", "submitter": { "id": 84900, "url": "http://patchwork.ozlabs.org/api/1.1/people/84900/?format=api", "name": "Larysa Zaremba", "email": "larysa.zaremba@intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260429074232.180528-1-larysa.zaremba@intel.com/mbox/", "series": [ { "id": 502008, "url": "http://patchwork.ozlabs.org/api/1.1/series/502008/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=502008", "date": "2026-04-29T07:42:30", "name": "[iwl-net] idpf: fix RSS LUT memcpy size", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502008/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230077/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230077/checks/", "tags": {}, "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=Lh0mEjJL;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=140.211.166.137; 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envelope-from=intel-wired-lan-bounces@osuosl.org;\n receiver=<UNKNOWN> ", "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 smtp4.osuosl.org 6EEC14220D", "OpenDKIM Filter v2.11.0 smtp2.osuosl.org E033D4044A" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=osuosl.org;\n\ts=default; t=1777448561;\n\tbh=HhhqAOSf7r+oyqHVrybWEak9RazPKJT+nJg4pzZIXqM=;\n\th=From:To:Cc:Date:Subject:List-Id:List-Unsubscribe:List-Archive:\n\t List-Post:List-Help:List-Subscribe:From;\n\tb=Lh0mEjJL5DbDCO+ouGu8SO6dhpEQrZFlInTM2038eEQzhdlv7OPp6lpY0dlait2nA\n\t ft6Zf8Y+cjecbjPgxLil92HuFVPWiJZ6jHJMIwAb7YG1eILBZz9tpOFbjnQNv23EfF\n\t qLgwkfS2eK5g9sGR099rZj3d/LJPde1pCdDN/sv5W8abBQO1S8UuQPIVSQeU3ho4qY\n\t /zDi31s1PhS1UAZs0BkgrLgUm58aoRA1+xo2YclzdTOaSyWSBKwt/gg4AJrZmH752/\n\t pyO2ymWkr45puDN1IyLhQd07q2mITZZfHV24J+Dk9yfwsSvu7rwhfyl904vMw2uLSO\n\t TrJwDXlerst3A==", "Received-SPF": "Pass (mailfrom) identity=mailfrom; client-ip=198.175.65.12;\n helo=mgamail.intel.com; envelope-from=larysa.zaremba@intel.com;\n receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp2.osuosl.org E033D4044A", "X-CSE-ConnectionGUID": [ "ILy6+06JRj++BYRZtTOWfg==", "8EIVIcpZRqitLPI+BaAevg==" ], "X-CSE-MsgGUID": [ "J6QmZCOkT1CETFEPbUsYQg==", "CeyFazFEQhSIaQZgcZd+ww==" ], "X-IronPort-AV": [ "E=McAfee;i=\"6800,10657,11770\"; a=\"89833761\"", "E=Sophos;i=\"6.23,205,1770624000\"; d=\"scan'208\";a=\"89833761\"", "E=Sophos;i=\"6.23,205,1770624000\"; d=\"scan'208\";a=\"235968120\"" ], "X-ExtLoop1": "1", "From": "Larysa Zaremba <larysa.zaremba@intel.com>", "To": "intel-wired-lan@lists.osuosl.org, Jacob Keller <jacob.e.keller@intel.com>", "Cc": "Przemek Kitszel <przemyslaw.kitszel@intel.com>,\n Andrew Lunn <andrew+netdev@lunn.ch>,\n \"David S. Miller\" <davem@davemloft.net>,\n Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,\n Paolo Abeni <pabeni@redhat.com>, Joshua Hay <joshua.a.hay@intel.com>,\n Willem de Bruijn <willemb@google.com>,\n Alice Michael <alice.michael@intel.com>, netdev@vger.kernel.org,\n linux-kernel@vger.kernel.org,\n Aleksandr Loktionov <aleksandr.loktionov@intel.com>,\n Larysa Zaremba <larysa.zaremba@intel.com>,\n Tony Nguyen <anthony.l.nguyen@intel.com>", "Date": "Wed, 29 Apr 2026 09:42:30 +0200", "Message-ID": "<20260429074232.180528-1-larysa.zaremba@intel.com>", "X-Mailer": "git-send-email 2.47.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Mailman-Original-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1777448559; x=1808984559;\n h=from:to:cc:subject:date:message-id:mime-version:\n content-transfer-encoding;\n bh=Cr0vQaNUqcHT5qkJDPRkR29t4xZtKhdC8p1BUKcPsvY=;\n b=i/z50MRc5q2gQA6wuQLdhj5dGsVknE5cJHbKtL1pnYfD+F87QKbE83FQ\n SCo8CKimzyx5r6T6BvYMZD5uyjoWTB7sKjSPa0QKd1CoOLmK2VObPAZLG\n jASbeew4pA59oEfZH4UrgqW/f6k6n8ozHRDd1vN2HoU2uPHTO0bM+Kf8T\n Y1GWIByLlD0W2njhwJN7ndkzyIMhwSeFepUWcBdcY/wCuNagNAJlQyFzx\n A5vGgf2TuyGTbGpxVTT60t/7GTZgL7w+4ssSATGaroBSqLZfP+7sO2Ob6\n huVwSBef9P6+zilPmykd7GQQr7zPF1Iskjd3dZsts0UQn3HbUtrzc4EN5\n Q==;", "X-Mailman-Original-Authentication-Results": [ "smtp2.osuosl.org;\n dmarc=pass (p=none dis=none)\n header.from=intel.com", "smtp2.osuosl.org;\n dkim=pass (2048-bit key,\n unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256\n header.s=Intel header.b=i/z50MRc" ], "Subject": "[Intel-wired-lan] [PATCH iwl-net] idpf: fix RSS LUT memcpy size", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n <intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "Based on the following feedback from Sashiko (received for iXD phase 1\npatchset, but valid for the net tree):\n\n \"Is the bounds check xn_params.recv_mem.iov_len < lut_buf_size sufficient?\n Since lut_buf_size only represents the size of the array elements, should\n this check instead verify that the payload is at least\n sizeof(struct virtchnl2_rss_lut) + lut_buf_size?\n\n [...]\n\n Does memcpy copy the correct amount of data here? rss_lut_size stores the\n number of 32-bit entries, not the size in bytes. Should it use\n lut_buf_size or rss_data->rss_lut_size * sizeof(u32) instead?\"\n\nAfter inspecting the code, it was concluded that RSS memcpy size is in fact\n4 times smaller than it has to be, since a single array entry in a u32, and\nrss_data->rss_lut_size is clearly used as an array size. Required Rx buffer\nsize is also too small, but this is a common issue in the idpf code.\n\nUse a full buffer size (lut_buf_size) instead of the array length\n(rss_data->rss_lut_size) when doing memcpy of RSS lookup table.\nWhile at it, increase required Rx buffer size to a whole flex-array\ncontaining structure instead of just the array.\n\nLink: https://sashiko.dev/#/patchset/20260323174052.5355-1-larysa.zaremba%40intel.com?part=8\nFixes: 95af467d9a4e (\"idpf: configure resources for RX queues\")\nReviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>\nSigned-off-by: Larysa Zaremba <larysa.zaremba@intel.com>\n---\n drivers/net/ethernet/intel/idpf/idpf_virtchnl.c | 4 ++--\n 1 file changed, 2 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c\nindex be66f9b2e101..a97d2e9b54d4 100644\n--- a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c\n+++ b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c\n@@ -2916,7 +2916,7 @@ int idpf_send_get_set_rss_lut_msg(struct idpf_adapter *adapter,\n \t\treturn -EIO;\n \n \tlut_buf_size = le16_to_cpu(recv_rl->lut_entries) * sizeof(u32);\n-\tif (reply_sz < lut_buf_size)\n+\tif (reply_sz < lut_buf_size + sizeof(struct virtchnl2_rss_lut))\n \t\treturn -EIO;\n \n \t/* size didn't change, we can reuse existing lut buf */\n@@ -2933,7 +2933,7 @@ int idpf_send_get_set_rss_lut_msg(struct idpf_adapter *adapter,\n \t}\n \n do_memcpy:\n-\tmemcpy(rss_data->rss_lut, recv_rl->lut, rss_data->rss_lut_size);\n+\tmemcpy(rss_data->rss_lut, recv_rl->lut, lut_buf_size);\n \n \treturn 0;\n }\n", "prefixes": [ "iwl-net" ] }