[PATCH 5.11 025/210] cifs: escape spaces in share names

[Greg Kroah-Hartman]

From: Maciek Borzecki <maciek.borze...@gmail.com>

commit 0fc9322ab5e1fe6910c9673e1a7ff29f7dd72611 upstream.

Commit 653a5efb849a ("cifs: update super_operations to show_devname")
introduced the display of devname for cifs mounts. However, when mounting
a share which has a whitespace in the name, that exact share name is also
displayed in mountinfo. Make sure that all whitespace is escaped.

Signed-off-by: Maciek Borzecki <maciek.borze...@gmail.com>
CC: <sta...@vger.kernel.org> # 5.11+
Reviewed-by: Shyam Prasad N <spra...@microsoft.com>
Signed-off-by: Steve French <stfre...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 fs/cifs/cifsfs.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -475,7 +475,8 @@ static int cifs_show_devname(struct seq_
                seq_puts(m, "none");
        else {
                convert_delimiter(devname, '/');
-               seq_puts(m, devname);
+               /* escape all spaces in share names */
+               seq_escape(m, devname, " \t");
                kfree(devname);
        }
        return 0;