diff options
| -rw-r--r-- | fs/ubifs/file.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index b4fbeefba246..a9c5cc6c0bc5 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -1605,6 +1605,35 @@ static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma) return 0; } +static int ubifs_file_open(struct inode *inode, struct file *filp) +{ + int ret; + struct dentry *dir; + struct ubifs_info *c = inode->i_sb->s_fs_info; + + if (ubifs_crypt_is_encrypted(inode)) { + ret = fscrypt_get_encryption_info(inode); + if (ret) + return -EACCES; + if (!fscrypt_has_encryption_key(inode)) + return -ENOKEY; + } + + dir = dget_parent(file_dentry(filp)); + if (ubifs_crypt_is_encrypted(d_inode(dir)) && + !fscrypt_has_permitted_context(d_inode(dir), inode)) { + ubifs_err(c, "Inconsistent encryption contexts: %lu/%lu", + (unsigned long) d_inode(dir)->i_ino, + (unsigned long) inode->i_ino); + dput(dir); + ubifs_ro_mode(c, -EPERM); + return -EPERM; + } + dput(dir); + + return 0; +} + const struct address_space_operations ubifs_file_address_operations = { .readpage = ubifs_readpage, .writepage = ubifs_writepage, @@ -1647,6 +1676,7 @@ const struct file_operations ubifs_file_operations = { .unlocked_ioctl = ubifs_ioctl, .splice_read = generic_file_splice_read, .splice_write = iter_file_splice_write, + .open = ubifs_file_open, #ifdef CONFIG_COMPAT .compat_ioctl = ubifs_compat_ioctl, #endif |