f2fs: deny accessing encryption policy if encryption is off

This patch adds missing feature check in encryption ioctl interface.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 41a6f1f704167fdb333894144ec2e4454c868cb7..25038cfc921732ebcf410e6994865075d126da99 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1928,6 +1928,9 @@ static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
 {
        struct inode *inode = file_inode(filp);
 
+       if (!f2fs_sb_has_crypto(inode->i_sb))
+               return -EOPNOTSUPP;
+
        f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
 
        return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
@@ -1935,6 +1938,8 @@ static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
 
 static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
 {
+       if (!f2fs_sb_has_crypto(file_inode(filp)->i_sb))
+               return -EOPNOTSUPP;
        return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
 }