linux-kernel - [PATCH] cifs: escape spaces in share names

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Message-Id: <dc18955dda8844bf7b27dfd2cce50f7c62eb82e5.1617720952.git.maciek.borzecki@gmail.com>
Date:   Tue,  6 Apr 2021 17:02:29 +0200
From:   Maciek Borzecki <maciek.borzecki@...il.com>
To:     linux-kernel@...r.kernel.org, linux-cifs@...r.kernel.org,
        Steve French <sfrench@...ba.org>
Cc:     Maciek Borzecki <maciek.borzecki@...il.com>
Subject: [PATCH] cifs: escape spaces in share names

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.borzecki@...il.com>
---
 fs/cifs/cifsfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 099ad9f3660bb28db1b6a9aea9538282b41c6455..3c6cb85b95e207df222248f10cc9df937cdda24e 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -476,7 +476,8 @@ static int cifs_show_devname(struct seq_file *m, struct dentry *root)
 		seq_puts(m, "none");
 	else {
 		convert_delimiter(devname, '/');
-		seq_puts(m, devname);
+		/* escape all spaces in share names */
+		seq_escape(m, devname, " ");
 		kfree(devname);
 	}
 	return 0;
-- 
2.31.1