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{ "id": 2220590, "url": "http://patchwork.ozlabs.org/api/1.1/covers/2220590/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/20260407153757.2047930-1-john.cabaj@canonical.com/", "project": { "id": 15, "url": "http://patchwork.ozlabs.org/api/1.1/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": "<20260407153757.2047930-1-john.cabaj@canonical.com>", "date": "2026-04-07T15:37:53", "name": "[SRU,Q/N:linux-azure,0/2,v2] Backporting critical SMB client fixes to affected Ubuntu distros", "submitter": { "id": 85032, "url": "http://patchwork.ozlabs.org/api/1.1/people/85032/?format=api", "name": "John Cabaj", "email": "john.cabaj@canonical.com" }, "mbox": "http://patchwork.ozlabs.org/project/ubuntu-kernel/cover/20260407153757.2047930-1-john.cabaj@canonical.com/mbox/", "series": [ { "id": 498995, "url": "http://patchwork.ozlabs.org/api/1.1/series/498995/?format=api", "web_url": "http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=498995", "date": "2026-04-07T15:37:53", "name": "Backporting critical SMB client fixes to affected Ubuntu distros", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/498995/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2220590/comments/", "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=lWELlGK5;\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; helo=lists.ubuntu.com;\n envelope-from=kernel-team-bounces@lists.ubuntu.com;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fqr1x6Z4bz1yD3\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 08 Apr 2026 01:38:13 +1000 (AEST)", "from localhost ([127.0.0.1] helo=lists.ubuntu.com)\n\tby lists.ubuntu.com with esmtp (Exim 4.86_2)\n\t(envelope-from <kernel-team-bounces@lists.ubuntu.com>)\n\tid 1wA8V8-0003rI-NB; Tue, 07 Apr 2026 15:38:02 +0000", "from smtp-relay-internal-0.internal ([10.131.114.225]\n helo=smtp-relay-internal-0.canonical.com)\n by lists.ubuntu.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.86_2) (envelope-from <john.cabaj@canonical.com>)\n id 1wA8V7-0003qU-0W\n for kernel-team@lists.ubuntu.com; Tue, 07 Apr 2026 15:38:01 +0000", "from mail-qt1-f200.google.com (mail-qt1-f200.google.com\n [209.85.160.200])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id D80873F63D\n for <kernel-team@lists.ubuntu.com>; Tue, 7 Apr 2026 15:38:00 +0000 (UTC)", "by mail-qt1-f200.google.com with SMTP id\n d75a77b69052e-50da31af14cso24308091cf.1\n for <kernel-team@lists.ubuntu.com>; Tue, 07 Apr 2026 08:38:00 -0700 (PDT)", "from smtp.gmail.com\n (h208-73-92-250.mdtnwi.broadband.dynamic.tds.net. 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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": "BugLink: https://bugs.launchpad.net/bugs/2147347\n\nSRU Justification\n\n[Impact]\n\n* Microsoft requested patches to address potential data corruption issues when network disconnects during extended writes.\n\n[Fix]\nQuesting\n* clean cherry-pick of upstream patches:\n * d78840a6a38d: \"smb: client: fix in-place encryption corruption in SMB2_write()\"\n * e3beefd3af09: \"cifs: make default value of retrans as zero\"\nNoble\n* clean cherry-pick of upstream patch:\n * d78840a6a38d: \"smb: client: fix in-place encryption corruption in SMB2_write()\"\n* simple backport of upstream patch:\n * e3beefd3af09: \"cifs: make default value of retrans as zero\"\nJammy\n* Requires additional patches, to be sent by Microsoft\n\n[Test Plan]\n\n* Compile tested\n* Microsoft to test\n\n[Regression potential]\n\n* Patches limited to CIFs. Possible regressions result in unexpected behavior of CIFs driver.\n\n[Other info]\n\n* SF#00432539\n\n------------------------\n\nv2: Removing Jammy from patch list as Microsoft needs to supply additional patches\n\nBharath SM (1):\n smb: client: fix in-place encryption corruption in SMB2_write()\n\nShyam Prasad N (1):\n cifs: make default value of retrans as zero\n\n fs/smb/client/fs_context.c | 2 +-\n fs/smb/client/smb2pdu.c | 5 ++++-\n 2 files changed, 5 insertions(+), 2 deletions(-)" }