エラーメッセージ「CIFS VFS: No writable handles for inode」が表示され、CIFS 共有でファイルを作成できない

Issue

• ユーザーは CIFS 共有のファイルの読み取りや削除ができます。
• しかし、同じ CIFS 共有でファイルを作成できません。メッセージに以下のエラーが表示されます。

Mar 25 14:55:02 client kernel: cifs_vfs_err: 9 callbacks suppressed
Mar 25 14:55:02 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:55:02 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:55:02 client kernel: CIFS VFS: No writable handles for inode
...
Mar 25 14:55:46 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:55:47 client kernel: CIFS VFS: No writable handles for inode 
Mar 25 14:55:47 client kernel: device eth2 entered promiscuous mode
Mar 25 14:55:47 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:55:47 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:55:47 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:55:48 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:55:51 client kernel: cifs_vfs_err: 9 callbacks suppressed
Mar 25 14:55:51 client kernel: CIFS VFS: No writable handles for inode
...
Mar 25 14:56:48 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:56:59 client systemd-logind: Removed session 27595.
Mar 25 14:56:59 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:57:22 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:57:37 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:57:55 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:58:09 client kernel: CIFS VFS: No writable handles for inode
Mar 25 14:58:21 client kernel: CIFS VFS: No writable handles for inode