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GET /api/patches/2223244/?format=api
{ "id": 2223244, "url": "http://patchwork.ozlabs.org/api/patches/2223244/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260414191533.1467353-3-michael.bommarito@gmail.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/projects/12/?format=api", "name": "Linux CIFS Client", "link_name": "linux-cifs-client", "list_id": "linux-cifs.vger.kernel.org", "list_email": "linux-cifs@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260414191533.1467353-3-michael.bommarito@gmail.com>", "list_archive_url": null, "date": "2026-04-14T19:15:32", "name": "[2/3] ksmbd: reject negative ngroups in ksmbd_alloc_user()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "925adb21e347fcfa3246bc5166c0dcd049066daf", "submitter": { "id": 93078, "url": "http://patchwork.ozlabs.org/api/people/93078/?format=api", "name": "Michael Bommarito", "email": "michael.bommarito@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260414191533.1467353-3-michael.bommarito@gmail.com/mbox/", "series": [ { "id": 499887, "url": "http://patchwork.ozlabs.org/api/series/499887/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=499887", "date": "2026-04-14T19:15:31", "name": "ksmbd: harden IPC response arithmetic and ACE walk", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499887/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2223244/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223244/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-cifs+bounces-10818-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-cifs@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=FX7CsWco;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; helo=sin.lore.kernel.org;\n envelope-from=linux-cifs+bounces-10818-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com\n header.b=\"FX7CsWco\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=209.85.219.53", "smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com", "smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=gmail.com" ], "Received": [ "from sin.lore.kernel.org (sin.lore.kernel.org\n [IPv6:2600:3c15:e001:75::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fwDX500Ztz1yHH\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 15 Apr 2026 05:16:04 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sin.lore.kernel.org (Postfix) with ESMTP id 2EDC2300D4EA\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 14 Apr 2026 19:15:43 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 703DA2D1F64;\n\tTue, 14 Apr 2026 19:15:41 +0000 (UTC)", "from mail-qv1-f53.google.com (mail-qv1-f53.google.com\n [209.85.219.53])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 31567283FEF\n\tfor <linux-cifs@vger.kernel.org>; Tue, 14 Apr 2026 19:15:40 +0000 (UTC)", "by mail-qv1-f53.google.com with SMTP id\n 6a1803df08f44-89f1e767f92so47882476d6.2\n for <linux-cifs@vger.kernel.org>;\n Tue, 14 Apr 2026 12:15:40 -0700 (PDT)", "from server0 (c-68-48-65-54.hsd1.mi.comcast.net. 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A\nnegative ngroups passes through into the subsequent multiplication\n\n\tresp_ext->ngroups * sizeof(gid_t)\n\nwhere signed-to-size_t conversion turns e.g. -1 into SIZE_MAX, and\nkmemdup() is handed an absurd size. In practice kmemdup() fails\ngracefully on the huge allocation, but the intent of the guard is\nto reject out-of-range values up front, not rely on the allocator\nto notice.\n\nReject negative ngroups explicitly so the check reflects the actual\nvalid range, and switch the log format for ngroups from %u to %d so\nthe bad signed value is printed correctly.\n\nFixes: a77e0e02af1c (\"ksmbd: add support for supplementary groups\")\nCc: stable@vger.kernel.org\nAssisted-by: Claude:claude-opus-4-6\nAssisted-by: Codex:gpt-5-4\nSigned-off-by: Michael Bommarito <michael.bommarito@gmail.com>\n---\n\nfs/smb/server/mgmt/user_config.c | 4 ++--\n1 file changed, 2 insertions(+), 2 deletions(-)\n\n--\n2.53.0", "diff": "diff --git a/fs/smb/server/mgmt/user_config.c b/fs/smb/server/mgmt/user_config.c\nindex a3183fe5c536..c62e2bf0ebef 100644\n--- a/fs/smb/server/mgmt/user_config.c\n+++ b/fs/smb/server/mgmt/user_config.c\n@@ -56,8 +56,8 @@ struct ksmbd_user *ksmbd_alloc_user(struct ksmbd_login_response *resp,\n \t\tgoto err_free;\n \n \tif (resp_ext) {\n-\t\tif (resp_ext->ngroups > NGROUPS_MAX) {\n-\t\t\tpr_err(\"ngroups(%u) from login response exceeds max groups(%d)\\n\",\n+\t\tif (resp_ext->ngroups < 0 || resp_ext->ngroups > NGROUPS_MAX) {\n+\t\t\tpr_err(\"ngroups(%d) from login response exceeds max groups(%d)\\n\",\n \t\t\t\t\tresp_ext->ngroups, NGROUPS_MAX);\n \t\t\tgoto err_free;\n \t\t}\n", "prefixes": [ "2/3" ] }