Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Jeff Layton <jlayton@kernel.org>
To:     chuck.lever@oracle.com
Cc:     linux-nfs@vger.kernel.org, trond.myklebust@hammerspace.com,
        anna@kernel.org, "J . Bruce Fields" <bfields@fieldses.org>
Subject: [PATCH 1/2] lockd: set fl_owner when unlocking files
Date:   Mon, 11 Jul 2022 14:30:13 -0400
Message-Id: <20220711183014.15161-2-jlayton@kernel.org>
In-Reply-To: <20220711183014.15161-1-jlayton@kernel.org>
References: <20220711183014.15161-1-jlayton@kernel.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Unlocking a POSIX inode with vfs_lock_file only works if the owner
matches. Ensure we set it in the request.

Cc: J. Bruce Fields <bfields@fieldses.org>
Fixes: 7f024fcd5c97 ("Keep read and write fds with each nlm_file")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/lockd/svcsubs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index 0a22a2faf552..b2f277727469 100644
--- a/fs/lockd/svcsubs.c
+++ b/fs/lockd/svcsubs.c
@@ -176,7 +176,7 @@ nlm_delete_file(struct nlm_file *file)
 	}
 }
 
-static int nlm_unlock_files(struct nlm_file *file)
+static int nlm_unlock_files(struct nlm_file *file, fl_owner_t owner)
 {
 	struct file_lock lock;
 
@@ -184,6 +184,7 @@ static int nlm_unlock_files(struct nlm_file *file)
 	lock.fl_type  = F_UNLCK;
 	lock.fl_start = 0;
 	lock.fl_end   = OFFSET_MAX;
+	lock.fl_owner = owner;
 	if (file->f_file[O_RDONLY] &&
 	    vfs_lock_file(file->f_file[O_RDONLY], F_SETLK, &lock, NULL))
 		goto out_err;
@@ -225,7 +226,7 @@ nlm_traverse_locks(struct nlm_host *host, struct nlm_file *file,
 		if (match(lockhost, host)) {
 
 			spin_unlock(&flctx->flc_lock);
-			if (nlm_unlock_files(file))
+			if (nlm_unlock_files(file, fl->fl_owner))
 				return 1;
 			goto again;
 		}
-- 
2.36.1