From 82854fb438caaeb84a0b2e47d0b0b8bbc4736aed Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Wed, 28 Dec 2016 00:22:52 -0500 Subject: [PATCH] ext4: don't allow encrypted operations without keys commit 173b8439e1ba362007315868928bf9d26e5cc5a6 upstream. While we allow deletes without the key, the following should not be permitted: # cd /vdc/encrypted-dir-without-key # ls -l total 4 -rw-r--r-- 1 root root 0 Dec 27 22:35 6,LKNRJsp209FbXoSvJWzB -rw-r--r-- 1 root root 286 Dec 27 22:35 uRJ5vJh9gE7vcomYMqTAyD # mv uRJ5vJh9gE7vcomYMqTAyD 6,LKNRJsp209FbXoSvJWzB Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/namei.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 1d007e853f5c..6445d84266fa 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -3506,6 +3506,12 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, int credits; u8 old_file_type; + if ((ext4_encrypted_inode(old_dir) && + !ext4_has_encryption_key(old_dir)) || + (ext4_encrypted_inode(new_dir) && + !ext4_has_encryption_key(new_dir))) + return -ENOKEY; + retval = dquot_initialize(old.dir); if (retval) return retval; @@ -3706,6 +3712,12 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry, u8 new_file_type; int retval; + if ((ext4_encrypted_inode(old_dir) && + !ext4_has_encryption_key(old_dir)) || + (ext4_encrypted_inode(new_dir) && + !ext4_has_encryption_key(new_dir))) + return -ENOKEY; + if ((ext4_encrypted_inode(old_dir) || ext4_encrypted_inode(new_dir)) && (old_dir != new_dir) && -- 2.20.1