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GET /api/1.0/patches/2220105/?format=api
{ "id": 2220105, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2220105/?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": "<c375cdea3d4300f3e06c1a0bb57004665d4a7bd8.1775471884.git.cengiz.can@canonical.com>", "date": "2026-04-06T10:51:21", "name": "[SRU,J,1/1] nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5b23dc4e56ede515dff4309cd54c3507b998826b", "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/c375cdea3d4300f3e06c1a0bb57004665d4a7bd8.1775471884.git.cengiz.can@canonical.com/mbox/", "series": [ { "id": 498840, "url": "http://patchwork.ozlabs.org/api/1.0/series/498840/?format=api", "date": "2026-04-06T10:51:20", "name": "CVE-2026-23112", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498840/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220105/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=pt8SNIHn;\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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a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1775472696; x=1776077496;\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=4uQRJawU1GOQVh+SCBkBbtaIrlrWfKYNDfnqwkw5Z00=;\n b=rU50/V6FdhMtUm/1i8uGijVT4uyqwkUFfhxrRgdNnSdfgzK4AZWHrctqt/FDu47uqq\n o8s3QdL4IPL3ypslOYEWnMypbldllqarM7t4VVFccquDsS5D3u8FngSXD3vV0ajk5h2N\n a4bHYKA2I3HQpScDagMhCoxt43n9pTAPcUMqOl/K9WgeqvKwIhtHZFXbC73YRTBK7F6V\n eSzWq/ZqDX0ZCw2XKhSlVGm1qrgONOZq+F+/Rtuqonz2dhDd6LDcozs21HkRZ4luQ1YZ\n a+FrU4wSHSNEUKhfGaoP/+VyqMetUc8bPB/3TJbtZ3rpyAObZvX/jCL+IweGTTEP0yUv\n 8sgA==", "X-Gm-Message-State": "AOJu0Yw+IkrGxAZ7gs1FItuB6Be/C96Ylhfpaq79hOomoZP/LnD0L6pN\n KJc/kapCTGksizMK1yzcoyRRcOrPxZ4fg/+VgmLwYboBq2Fd3ImR0GAOiz6hP2mJOJB/AQ7nXDv\n sPRrpSs2j7zHPcy3ZKAZLAr3ibYhRNUhlgZDuoLnlGzyTweSG2H1G2Kp2D+x4dHR/wgX8crUqE4\n uHpnQdtgWxA145HA==", "X-Gm-Gg": "AeBDietEPaOxyZqAY/zcHhCwii8+eXZAkrhEbiiWSHydnzb6pV1UgpU+IlGjGn5euN7\n gKTtkmY0jOn3/mX3b2QzwJ6wMRdbjz3fZsgkObfv0Z0yM+3o/Gwwo0hZ89Q9iEv3QDMxBzQtP1G\n w5EYD6j6QpPNaVzCxMT3MtmvBU/lpupoVNN4OXTrT1pi17xiCEWjcTSmFJf6lH0XYT8DS1WjIdg\n wzigS60rheSJsJpmw8SMdnZ5gtk/jWqX57nmiWeOrrHVuQj1gH6TrLgkDmfDaPrPVsuTTaIr2KC\n HZNSkXI8CwC3y+L6GrkPI/vVpgf/W4G4ADIE6fHbyJpZN1hEArDeWpAf9+Bvq+cp/l/8FgyWa7O\n VlbmSXRKr+8+PqZ2lTpfk78E=", "X-Received": [ "by 2002:a05:600c:154b:b0:488:af14:f1da with SMTP id\n 5b1f17b1804b1-488af14f30amr58868575e9.7.1775472696275;\n Mon, 06 Apr 2026 03:51:36 -0700 (PDT)", "by 2002:a05:600c:154b:b0:488:af14:f1da with SMTP id\n 5b1f17b1804b1-488af14f30amr58867805e9.7.1775472695773;\n Mon, 06 Apr 2026 03:51:35 -0700 (PDT)" ], "From": "Cengiz Can <cengiz.can@canonical.com>", "To": "kernel-team@lists.ubuntu.com", "Subject": "[SRU][J][PATCH 1/1] nvmet-tcp: add bounds checks in\n nvmet_tcp_build_pdu_iovec", "Date": "Mon, 6 Apr 2026 13:51:21 +0300", "Message-ID": "\n <c375cdea3d4300f3e06c1a0bb57004665d4a7bd8.1775471884.git.cengiz.can@canonical.com>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<cover.1775471884.git.cengiz.can@canonical.com>", "References": "<177546945105.885203.15305511673780617858@nexus9.public>\n <cover.1775471884.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\n[ Upstream commit 52a0a98549344ca20ad81a4176d68d28e3c05a5c ]\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>\nSigned-off-by: Sasha Levin <sashal@kernel.org>\nSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>\n(backported from commit 42afe8ed8ad2de9c19457156244ef3e1eca94b5d linux-5.15.y)\n[cengizcan: adjusted for kvec/kmap style, moved bounds checks before iov_len assignment]\nCVE-2026-23112\nSigned-off-by: Cengiz Can <cengiz.can@canonical.com>\n---\n drivers/nvme/target/tcp.c | 22 +++++++++++++++++++++-\n 1 file changed, 21 insertions(+), 1 deletion(-)", "diff": "diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c\nindex 051798ef7431..f8d158e0aa34 100644\n--- a/drivers/nvme/target/tcp.c\n+++ b/drivers/nvme/target/tcp.c\n@@ -309,27 +309,47 @@ static void nvmet_tcp_unmap_pdu_iovec(struct nvmet_tcp_cmd *cmd)\n \t\tkunmap(sg_page(&sg[i]));\n }\n \n+static void nvmet_tcp_fatal_error(struct nvmet_tcp_queue *queue);\n+\n static void nvmet_tcp_map_pdu_iovec(struct nvmet_tcp_cmd *cmd)\n {\n \tstruct kvec *iov = cmd->iov;\n \tstruct scatterlist *sg;\n \tu32 length, offset, sg_offset;\n+\tunsigned int sg_remaining;\n \n \tlength = cmd->pdu_len;\n \tcmd->nr_mapped = DIV_ROUND_UP(length, PAGE_SIZE);\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\tu32 iov_len = min_t(u32, length, sg->length - sg_offset);\n+\t\tu32 iov_len;\n+\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+\n+\t\tiov_len = min_t(u32, length, sg->length - sg_offset);\n \n \t\tiov->iov_base = kmap(sg_page(sg)) + sg->offset + sg_offset;\n \t\tiov->iov_len = iov_len;\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", "J", "1/1" ] }