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GET /api/1.0/patches/2220104/?format=api
{ "id": 2220104, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2220104/?format=api", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/1.0/projects/15/?format=api", "name": "Ubuntu Kernel", "link_name": "ubuntu-kernel", "list_id": "kernel-team.lists.ubuntu.com", "list_email": "kernel-team@lists.ubuntu.com", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<e06d31ceaa4bace11b1ba4d6e3c251eb7763f69c.1775469458.git.cengiz.can@canonical.com>", "date": "2026-04-06T10:51:19", "name": "[SRU,N,1/1] nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "f03735a22378b9cc6d92b86f36a71f5d46d4af68", "submitter": { "id": 84024, "url": "http://patchwork.ozlabs.org/api/1.0/people/84024/?format=api", "name": "Cengiz Can", "email": "cengiz.can@canonical.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/e06d31ceaa4bace11b1ba4d6e3c251eb7763f69c.1775469458.git.cengiz.can@canonical.com/mbox/", "series": [ { "id": 498841, "url": "http://patchwork.ozlabs.org/api/1.0/series/498841/?format=api", "date": "2026-04-06T10:51:19", "name": "[SRU,N,1/1] nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498841/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220104/checks/", "tags": {}, "headers": { "Return-Path": "<kernel-team-bounces@lists.ubuntu.com>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (4096-bit key;\n unprotected) header.d=canonical.com header.i=@canonical.com\n header.a=rsa-sha256 header.s=20251003 header.b=XZPOH3kv;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com\n (client-ip=185.125.189.65; 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Mon, 6 Apr 2026 10:51:32 +0000 (UTC)", "by mail-wm1-f70.google.com with SMTP id\n 5b1f17b1804b1-488a9ed3c1eso8163655e9.1\n for <kernel-team@lists.ubuntu.com>; Mon, 06 Apr 2026 03:51:32 -0700 (PDT)", "from localhost ([176.41.26.180]) by smtp.gmail.com with ESMTPSA id\n 5b1f17b1804b1-488b739e00bsm33970455e9.10.2026.04.06.03.51.30\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Mon, 06 Apr 2026 03:51:31 -0700 (PDT)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com;\n s=20251003; t=1775472692;\n bh=KEKUhl06ySs742J3xcajOCxWilMS/rd6sDakVw2ZxcY=;\n h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n MIME-Version;\n b=XZPOH3kvZfgn08vHKgokDBf4nGxONwluBeQRI8Z/w3+nOPGBFaRN9Kt9oXMnP+HTa\n JBDRU7d6/wRhyDvS4VscbKfOltYqsQsYfJ9yTJCyA3jEHDVeuKN799Li2cUUZdIjT2\n vbzhadbabV75REmrmfrovfvdeiXp7KuFdEtFbkNfT6QJKMozini3Kofkjkm5dYR++k\n hVMNcpXi202X0qDFSFNO5jl2T5ishmioXHycRpxKiQ/x4RYI0QdQ0Vh70wSdPntinH\n /+U5WKjPB1GosesgGz5VYARdL/wdAKm+7ipsPWMgnIiTlNRhcnY7X7SYPZAZ1q3L38\n a0pcYBoM4OYVzEJ4knZNSrdyl+SXZo0l0c4tnfqP4YP+1guWZhCuJ0Dmy1hdIRbUV1\n b7i+jvRR4FrEce+CsyQ3KjZQN0K1EUgKd4H2d3OG1Ec1JiyP3VjC5SkwIHRpoYKGeC\n zNazPUxX8ZpH3d1q5XJ0MaxOZhEqpnlEFWwcV0tfxMcnd/Oc87xJcaJgRJg/B8NscD\n Qz7aeXxGBfsJbCl71nM2TA0yn//dRCEHWCMJonDFcGr0amSPfW+6NGGne8lutPJZfq\n 0Fyl/RDbLNrosXUZ4hyzB1MrQAL03Ni9jqLm3Q71gIO13ZbuvKT05KZGW/GuGe/q6P\n Y3NStMN8TwCHrQn/8667fphQ=", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1775472692; x=1776077492;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from\n :to:cc:subject:date:message-id:reply-to;\n bh=KEKUhl06ySs742J3xcajOCxWilMS/rd6sDakVw2ZxcY=;\n b=Beq2kj3TUltMlEM9IiDzpiR4I6kJ/fVXhDk4Q0garigcAd3uis+kaK1e2WW0Wtfk+K\n TWW6dFJzK1XkxLWgiJ8cB0rVmGOMC8ZMIsVocvJMLYREUn6v3/Hld4ENLk4q90la2z18\n eBG+L710hXeKGLMleOA246L+/akUJAmqSD+HyrfdrQ71z2GoZ/qBnNAjvzrT4sX7fsGy\n zaxJqRvTbWzFQi3l6uwozC2EHQse+UHlDPk/lmVmwUndNwgP/ZVAOt+yXfVBVft7SS23\n 3JAlMmGyBY8uV1BaS/5phH2xTeTLp7CFMbAWOhcnW9LkifyR1pIuZqqt60jaiqS6rlrU\n cBKQ==", "X-Gm-Message-State": "AOJu0YzRB+0I7dVsiGAo+G6PK3k7vC2Oe6AodvF1UxrgAE20DsIeQ11C\n /aHNYP7Cg6QVTAzGK/DyBR/0K9CjnsTPM77NEkvGw7bDoR8XSwpE19kJo2rwVEl0E4YJTteNHi1\n RJC4vEau77grqo2h5g37GAe53dIOtZdj65qOG7/3wJfCcoLjxgK+BJvyruos9plCZ4KxDWhYCSm\n 6cm9nx3OnZcMSQ+w==", "X-Gm-Gg": "AeBDievj/rIr1RGpi9YcZmnzEm+dnQBOBIuXlaNWQP03N3Ax1C3SfVwH0gTzzX+DKAT\n XtUZ/TQyud+s2Xqpr18IDVKK66QmmyOgbY9xCP4sxUQBjxXmNDe7KA8T9xzC+cb3XiFZPOEkCr3\n kHU4t3S2cMtR6Ud1WLOxfVb3r1h76XcbMFc985O1tNXXrnxknqKTUgJgiVUz7VXzo965eLEnDZ6\n oLFRFoYTpkChnApUAsyQ0qRdTKno92laIbnipAoRUE19RsVWOXvqrX1/XakQ/5+v4SRlpZNgofs\n ZEqdjh082F/AiOOZ9iuZhymmt9Ymh9DmEipcGB+i5G6TwAEPw0H70k7Igf6Re4UIa+OkTFQgRqD\n katC32gA5t7lw1pVq2Z+oTk8=", "X-Received": [ "by 2002:a05:600d:12:b0:488:8bdd:cfc7 with SMTP id\n 5b1f17b1804b1-488995d140bmr134618325e9.0.1775472691957;\n Mon, 06 Apr 2026 03:51:31 -0700 (PDT)", "by 2002:a05:600d:12:b0:488:8bdd:cfc7 with SMTP id\n 5b1f17b1804b1-488995d140bmr134618105e9.0.1775472691578;\n Mon, 06 Apr 2026 03:51:31 -0700 (PDT)" ], "From": "Cengiz Can <cengiz.can@canonical.com>", "To": "kernel-team@lists.ubuntu.com", "Subject": "[SRU][N][PATCH 1/1] nvmet-tcp: add bounds checks in\n nvmet_tcp_build_pdu_iovec", "Date": "Mon, 6 Apr 2026 13:51:19 +0300", "Message-ID": "\n <e06d31ceaa4bace11b1ba4d6e3c251eb7763f69c.1775469458.git.cengiz.can@canonical.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<cover.1775469458.git.cengiz.can@canonical.com>", "References": "<177546945105.885203.15305511673780617858@nexus9.public>\n <cover.1775469458.git.cengiz.can@canonical.com>", "MIME-Version": "1.0", "X-BeenThere": "kernel-team@lists.ubuntu.com", "X-Mailman-Version": "2.1.20", "Precedence": "list", "List-Id": "Kernel team discussions <kernel-team.lists.ubuntu.com>", "List-Unsubscribe": "<https://lists.ubuntu.com/mailman/options/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=unsubscribe>", "List-Archive": "<https://lists.ubuntu.com/archives/kernel-team>", "List-Post": "<mailto:kernel-team@lists.ubuntu.com>", "List-Help": "<mailto:kernel-team-request@lists.ubuntu.com?subject=help>", "List-Subscribe": "<https://lists.ubuntu.com/mailman/listinfo/kernel-team>,\n <mailto:kernel-team-request@lists.ubuntu.com?subject=subscribe>", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "kernel-team-bounces@lists.ubuntu.com", "Sender": "\"kernel-team\" <kernel-team-bounces@lists.ubuntu.com>" }, "content": "From: YunJe Shin <yjshin0438@gmail.com>\n\nnvmet_tcp_build_pdu_iovec() could walk past cmd->req.sg when a PDU\nlength or offset exceeds sg_cnt and then use bogus sg->length/offset\nvalues, leading to _copy_to_iter() GPF/KASAN. Guard sg_idx, remaining\nentries, and sg->length/offset before building the bvec.\n\nFixes: 872d26a391da (\"nvmet-tcp: add NVMe over TCP target driver\")\nSigned-off-by: YunJe Shin <ioerts@kookmin.ac.kr>\nReviewed-by: Sagi Grimberg <sagi@grimberg.me>\nReviewed-by: Joonkyo Jung <joonkyoj@yonsei.ac.kr>\nSigned-off-by: Keith Busch <kbusch@kernel.org>\n(cherry picked from commit 52a0a98549344ca20ad81a4176d68d28e3c05a5c)\nCVE-2026-23112\nSigned-off-by: Cengiz Can <cengiz.can@canonical.com>\n---\n drivers/nvme/target/tcp.c | 17 +++++++++++++++++\n 1 file changed, 17 insertions(+)", "diff": "diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c\nindex 9a5c6c114ba3..2bf592d3f041 100644\n--- a/drivers/nvme/target/tcp.c\n+++ b/drivers/nvme/target/tcp.c\n@@ -357,11 +357,14 @@ static void nvmet_tcp_free_cmd_buffers(struct nvmet_tcp_cmd *cmd)\n \tcmd->req.sg = NULL;\n }\n \n+static void nvmet_tcp_fatal_error(struct nvmet_tcp_queue *queue);\n+\n static void nvmet_tcp_build_pdu_iovec(struct nvmet_tcp_cmd *cmd)\n {\n \tstruct bio_vec *iov = cmd->iov;\n \tstruct scatterlist *sg;\n \tu32 length, offset, sg_offset;\n+\tunsigned int sg_remaining;\n \tint nr_pages;\n \n \tlength = cmd->pdu_len;\n@@ -369,9 +372,22 @@ static void nvmet_tcp_build_pdu_iovec(struct nvmet_tcp_cmd *cmd)\n \toffset = cmd->rbytes_done;\n \tcmd->sg_idx = offset / PAGE_SIZE;\n \tsg_offset = offset % PAGE_SIZE;\n+\tif (!cmd->req.sg_cnt || cmd->sg_idx >= cmd->req.sg_cnt) {\n+\t\tnvmet_tcp_fatal_error(cmd->queue);\n+\t\treturn;\n+\t}\n \tsg = &cmd->req.sg[cmd->sg_idx];\n+\tsg_remaining = cmd->req.sg_cnt - cmd->sg_idx;\n \n \twhile (length) {\n+\t\tif (!sg_remaining) {\n+\t\t\tnvmet_tcp_fatal_error(cmd->queue);\n+\t\t\treturn;\n+\t\t}\n+\t\tif (!sg->length || sg->length <= sg_offset) {\n+\t\t\tnvmet_tcp_fatal_error(cmd->queue);\n+\t\t\treturn;\n+\t\t}\n \t\tu32 iov_len = min_t(u32, length, sg->length - sg_offset);\n \n \t\tbvec_set_page(iov, sg_page(sg), iov_len,\n@@ -379,6 +395,7 @@ static void nvmet_tcp_build_pdu_iovec(struct nvmet_tcp_cmd *cmd)\n \n \t\tlength -= iov_len;\n \t\tsg = sg_next(sg);\n+\t\tsg_remaining--;\n \t\tiov++;\n \t\tsg_offset = 0;\n \t}\n", "prefixes": [ "SRU", "N", "1/1" ] }