diff options
| -rw-r--r-- | fs/ecryptfs/main.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c index 7d3ed6bfcfa5..cbd4e18adb20 100644 --- a/fs/ecryptfs/main.c +++ b/fs/ecryptfs/main.c @@ -483,6 +483,7 @@ out: } struct kmem_cache *ecryptfs_sb_info_cache; +static struct file_system_type ecryptfs_fs_type; /** * ecryptfs_read_super @@ -503,6 +504,13 @@ static int ecryptfs_read_super(struct super_block *sb, const char *dev_name) ecryptfs_printk(KERN_WARNING, "path_lookup() failed\n"); goto out; } + if (path.dentry->d_sb->s_type == &ecryptfs_fs_type) { + rc = -EINVAL; + printk(KERN_ERR "Mount on filesystem of type " + "eCryptfs explicitly disallowed due to " + "known incompatibilities\n"); + goto out_free; + } ecryptfs_set_superblock_lower(sb, path.dentry->d_sb); sb->s_maxbytes = path.dentry->d_sb->s_maxbytes; sb->s_blocksize = path.dentry->d_sb->s_blocksize; |