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GET /api/patches/2220099/?format=api
{ "id": 2220099, "url": "http://patchwork.ozlabs.org/api/patches/2220099/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/4bd30a75fc6c59d459d6d955085b065fdac36357.1775469458.git.cengiz.can@canonical.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/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, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<4bd30a75fc6c59d459d6d955085b065fdac36357.1775469458.git.cengiz.can@canonical.com>", "list_archive_url": null, "date": "2026-04-06T10:51:17", "name": "[SRU,Q,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/people/84024/?format=api", "name": "Cengiz Can", "email": "cengiz.can@canonical.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/4bd30a75fc6c59d459d6d955085b065fdac36357.1775469458.git.cengiz.can@canonical.com/mbox/", "series": [ { "id": 498839, "url": "http://patchwork.ozlabs.org/api/series/498839/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=498839", "date": "2026-04-06T10:51:17", "name": "CVE-2026-23112", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498839/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220099/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220099/checks/", "tags": {}, "related": [], "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=owmk5bCB;\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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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 470bf37e5a63..f7413d4ada92 100644\n--- a/drivers/nvme/target/tcp.c\n+++ b/drivers/nvme/target/tcp.c\n@@ -349,11 +349,14 @@ 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@@ -361,9 +364,22 @@ 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@@ -371,6 +387,7 @@ 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", "Q", "1/1" ] }