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authorTheodore Ts'o <tytso@mit.edu>2016-12-28 00:22:52 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-10-12 11:27:35 +0200
commit82854fb438caaeb84a0b2e47d0b0b8bbc4736aed (patch)
tree8ce45a54ae2187b7914f09c6f5a42532916d068e
parent4f22f0793ccedb43a8fd47c20943a777228b2265 (diff)
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 <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/ext4/namei.c12
1 files changed, 12 insertions, 0 deletions
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) &&