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GET /api/1.1/patches/2227565/?format=api
{ "id": 2227565, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2227565/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260423222209.3054909-4-dhowells@redhat.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260423222209.3054909-4-dhowells@redhat.com>", "date": "2026-04-23T22:22:06", "name": "[3/4] afs: Fix afs_get_link() to take validate_lock around afs_read_single()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "e283b1bec39c92e283419b506382aaf1b6ff4758", "submitter": { "id": 59, "url": "http://patchwork.ozlabs.org/api/1.1/people/59/?format=api", "name": "David Howells", "email": "dhowells@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260423222209.3054909-4-dhowells@redhat.com/mbox/", "series": [ { "id": 501258, "url": "http://patchwork.ozlabs.org/api/1.1/series/501258/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=501258", "date": "2026-04-23T22:22:03", "name": "netfs: Yet further miscellaneous fixes", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501258/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227565/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227565/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-cifs+bounces-11071-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 (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=G5uc/idx;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n\ts=mimecast20190719; t=1776982959;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\t to:to:cc:cc:mime-version:mime-version:\n\t content-transfer-encoding:content-transfer-encoding:\n\t in-reply-to:in-reply-to:references:references;\n\tbh=CEaZFT1kA2C9fmI8tLKUXOafS9Zq2QwNR5SdFuG0lEc=;\n\tb=G5uc/idxSx/apvBFFLOh1X2M/IEPV55jvoMl8SLbcMuZ0L1pNww627qP0gY+64wxbYzghw\n\tXUMo1uqdW4S2RwlGqQyWXR1KpWBMNwqg02v35+p3jXm1YtE/NUkFu0FEPH/Q6QciUc9tjQ\n\tvG6pAyRlAjSXoPsknZ4FBlYM7UEJWW4=", "X-MC-Unique": "6mRXVomyPvGKAhZHmx0xIA-1", "X-Mimecast-MFC-AGG-ID": "6mRXVomyPvGKAhZHmx0xIA_1776982956", "From": "David Howells <dhowells@redhat.com>", "To": "Christian Brauner <christian@brauner.io>", "Cc": "David Howells <dhowells@redhat.com>,\n\tPaulo Alcantara <pc@manguebit.org>,\n\tnetfs@lists.linux.dev,\n\tlinux-afs@lists.infradead.org,\n\tlinux-cifs@vger.kernel.org,\n\tceph-devel@vger.kernel.org,\n\tlinux-fsdevel@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tMarc Dionne <marc.dionne@auristor.com>", "Subject": "[PATCH 3/4] afs: Fix afs_get_link() to take validate_lock around\n afs_read_single()", "Date": "Thu, 23 Apr 2026 23:22:06 +0100", "Message-ID": "<20260423222209.3054909-4-dhowells@redhat.com>", "In-Reply-To": "<20260423222209.3054909-1-dhowells@redhat.com>", "References": "<20260423222209.3054909-1-dhowells@redhat.com>", "Precedence": "bulk", "X-Mailing-List": "linux-cifs@vger.kernel.org", "List-Id": "<linux-cifs.vger.kernel.org>", "List-Subscribe": "<mailto:linux-cifs+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-cifs+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.0 on 10.30.177.12" }, "content": "Fix afs_get_link() to take the validate_lock around afs_read_single() to\nprevent races between multiple ->get_link() calls.\n\nFixes: eae9e78951bb (\"afs: Use netfslib for symlinks, allowing them to be cached\")\nCloses: https://sashiko.dev/#/patchset/20260326104544.509518-1-dhowells%40redhat.com\nSigned-off-by: David Howells <dhowells@redhat.com>\ncc: Marc Dionne <marc.dionne@auristor.com>\ncc: linux-afs@lists.infradead.org\ncc: linux-fsdevel@vger.kernel.org\n---\n fs/afs/inode.c | 17 +++++++++++++----\n 1 file changed, 13 insertions(+), 4 deletions(-)", "diff": "diff --git a/fs/afs/inode.c b/fs/afs/inode.c\nindex 06e25e1b12df..5207c4a003f6 100644\n--- a/fs/afs/inode.c\n+++ b/fs/afs/inode.c\n@@ -78,10 +78,19 @@ const char *afs_get_link(struct dentry *dentry, struct inode *inode,\n \t\tgoto good;\n \n fetch:\n-\tret = afs_read_single(vnode, NULL);\n-\tif (ret < 0)\n-\t\treturn ERR_PTR(ret);\n-\tset_bit(AFS_VNODE_DIR_READ, &vnode->flags);\n+\tif (down_write_killable(&vnode->validate_lock) < 0)\n+\t\treturn ERR_PTR(-ERESTARTSYS);\n+\tif (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags) ||\n+\t !test_bit(AFS_VNODE_DIR_READ, &vnode->flags)) {\n+\t\tret = afs_read_single(vnode, NULL);\n+\t\tif (ret < 0) {\n+\t\t\tup_write(&vnode->validate_lock);\n+\t\t\treturn ERR_PTR(ret);\n+\t\t}\n+\t\tset_bit(AFS_VNODE_DIR_READ, &vnode->flags);\n+\t}\n+\n+\tup_write(&vnode->validate_lock);\n \n good:\n \tfolio = folioq_folio(vnode->directory, 0);\n", "prefixes": [ "3/4" ] }