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GET /api/1.2/patches/2221367/?format=api
{ "id": 2221367, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2221367/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260409095926.905020-8-rajasimandalos@gmail.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/1.2/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": "<20260409095926.905020-8-rajasimandalos@gmail.com>", "list_archive_url": null, "date": "2026-04-09T09:59:25", "name": "[8/9] smb: client: fix domainauto remount by syncing domainname from session", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "71c8458b3e02b30c0d5b5a7bac339c0d158f0073", "submitter": { "id": 91740, "url": "http://patchwork.ozlabs.org/api/1.2/people/91740/?format=api", "name": "Rajasi Mandal", "email": "rajasimandalos@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260409095926.905020-8-rajasimandalos@gmail.com/mbox/", "series": [ { "id": 499267, "url": "http://patchwork.ozlabs.org/api/1.2/series/499267/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=499267", "date": "2026-04-09T09:59:18", "name": "[1/9] smb: client: block non-reconfigurable option changes on remount", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499267/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221367/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221367/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-cifs+bounces-10737-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=XBpknkqL;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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On remount, libmount re-feeds domain=X, but the\nverify check compares against old ctx->domainname (NULL) and rejects\nthe remount with \"can not change domainname during remount\".\n\nSteps to reproduce:\n\n 1. Mount with domainauto (no explicit domain= option):\n mount -t cifs //server/share /mnt \\\n -o username=u,password=p,domainauto\n At this point ctx->domainname is NULL, but the server populates\n ses->domainName (e.g. \"CORP\") during session setup.\n\n 2. Bare remount (or any remount):\n mount -o remount /mnt\n libmount reads /proc/mounts, sees domain=CORP (output by\n cifs_show_options() from ses->domainName), and feeds it back\n to the kernel. The kernel parses domain=CORP into\n new_ctx->domainname=\"CORP\", but old ctx->domainname is still\n NULL. smb3_verify_reconfigure_ctx() sees the mismatch and\n rejects the remount.\n\nThis affects any server that populates ses->domainName during session\nsetup (Active Directory domain controllers, Azure Files) when the\nadmin uses domainauto instead of an explicit domain= option.\n\nFix this by syncing ctx->domainname from ses->domainName in\nsmb3_sync_ctx_from_negotiated() before the verify check runs.\n\nSigned-off-by: Rajasi Mandal <rajasimandal@microsoft.com>\n---\n fs/smb/client/fs_context.c | 3 +++\n 1 file changed, 3 insertions(+)", "diff": "diff --git a/fs/smb/client/fs_context.c b/fs/smb/client/fs_context.c\nindex 2be72733ef2e..d804e5da578e 100644\n--- a/fs/smb/client/fs_context.c\n+++ b/fs/smb/client/fs_context.c\n@@ -1232,6 +1232,9 @@ static void smb3_sync_ctx_from_negotiated(struct cifs_sb_info *cifs_sb)\n \t */\n \tctx->ops = server->ops;\n \tctx->vals = server->vals;\n+\t/* /proc/mounts shows domain= from ses->domainName */\n+\tif (tcon->ses->domainName && !ctx->domainname)\n+\t\tctx->domainname = kstrdup(tcon->ses->domainName, GFP_KERNEL);\n }\n \n /*\n", "prefixes": [ "8/9" ] }