diff options
Diffstat (limited to 'fs/ecryptfs/file.c')
| -rw-r--r-- | fs/ecryptfs/file.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c index 805be43324a..ef830491326 100644 --- a/fs/ecryptfs/file.c +++ b/fs/ecryptfs/file.c @@ -146,6 +146,15 @@ static int read_or_initialize_metadata(struct dentry *dentry) struct ecryptfs_mount_crypt_stat *mount_crypt_stat; struct ecryptfs_crypt_stat *crypt_stat; int rc; + struct file *lower_file = ecryptfs_file_to_lower(file); + + /* + * Don't allow mmap on top of file systems that don't support it + * natively. If FILESYSTEM_MAX_STACK_DEPTH > 2 or ecryptfs + * allows recursive mounting, this will need to be extended. + */ + if (!lower_file->f_op->mmap) + return -ENODEV; crypt_stat = &ecryptfs_inode_to_private(inode)->crypt_stat; mount_crypt_stat = &ecryptfs_superblock_to_private( |