diff options
Diffstat (limited to 'fs/xattr.c')
| -rw-r--r-- | fs/xattr.c | 82 |
1 files changed, 51 insertions, 31 deletions
diff --git a/fs/xattr.c b/fs/xattr.c index 6acd5c63da91..3f9c64bea151 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -51,20 +51,29 @@ setxattr(struct dentry *d, char __user *name, void __user *value, } } + down(&d->d_inode->i_sem); + error = security_inode_setxattr(d, kname, kvalue, size, flags); + if (error) + goto out; error = -EOPNOTSUPP; if (d->d_inode->i_op && d->d_inode->i_op->setxattr) { - down(&d->d_inode->i_sem); - error = security_inode_setxattr(d, kname, kvalue, size, flags); - if (error) - goto out; - error = d->d_inode->i_op->setxattr(d, kname, kvalue, size, flags); + error = d->d_inode->i_op->setxattr(d, kname, kvalue, + size, flags); if (!error) { fsnotify_xattr(d); - security_inode_post_setxattr(d, kname, kvalue, size, flags); + security_inode_post_setxattr(d, kname, kvalue, + size, flags); } -out: - up(&d->d_inode->i_sem); + } else if (!strncmp(kname, XATTR_SECURITY_PREFIX, + sizeof XATTR_SECURITY_PREFIX - 1)) { + const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1; + error = security_inode_setsecurity(d->d_inode, suffix, kvalue, + size, flags); + if (!error) + fsnotify_xattr(d); } +out: + up(&d->d_inode->i_sem); if (kvalue) kfree(kvalue); return error; @@ -139,20 +148,25 @@ getxattr(struct dentry *d, char __user *name, void __user *value, size_t size) return -ENOMEM; } + error = security_inode_getxattr(d, kname); + if (error) + goto out; error = -EOPNOTSUPP; - if (d->d_inode->i_op && d->d_inode->i_op->getxattr) { - error = security_inode_getxattr(d, kname); - if (error) - goto out; + if (d->d_inode->i_op && d->d_inode->i_op->getxattr) error = d->d_inode->i_op->getxattr(d, kname, kvalue, size); - if (error > 0) { - if (size && copy_to_user(value, kvalue, error)) - error = -EFAULT; - } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) { - /* The file system tried to returned a value bigger - than XATTR_SIZE_MAX bytes. Not possible. */ - error = -E2BIG; - } + else if (!strncmp(kname, XATTR_SECURITY_PREFIX, + sizeof XATTR_SECURITY_PREFIX - 1)) { + const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1; + error = security_inode_getsecurity(d->d_inode, suffix, kvalue, + size); + } + if (error > 0) { + if (size && copy_to_user(value, kvalue, error)) + error = -EFAULT; + } else if (error == -ERANGE && size >= XATTR_SIZE_MAX) { + /* The file system tried to returned a value bigger + than XATTR_SIZE_MAX bytes. Not possible. */ + error = -E2BIG; } out: if (kvalue) @@ -221,20 +235,24 @@ listxattr(struct dentry *d, char __user *list, size_t size) return -ENOMEM; } + error = security_inode_listxattr(d); + if (error) + goto out; error = -EOPNOTSUPP; if (d->d_inode->i_op && d->d_inode->i_op->listxattr) { - error = security_inode_listxattr(d); - if (error) - goto out; error = d->d_inode->i_op->listxattr(d, klist, size); - if (error > 0) { - if (size && copy_to_user(list, klist, error)) - error = -EFAULT; - } else if (error == -ERANGE && size >= XATTR_LIST_MAX) { - /* The file system tried to returned a list bigger - than XATTR_LIST_MAX bytes. Not possible. */ - error = -E2BIG; - } + } else { + error = security_inode_listsecurity(d->d_inode, klist, size); + if (size && error >= size) + error = -ERANGE; + } + if (error > 0) { + if (size && copy_to_user(list, klist, error)) + error = -EFAULT; + } else if (error == -ERANGE && size >= XATTR_LIST_MAX) { + /* The file system tried to returned a list bigger + than XATTR_LIST_MAX bytes. Not possible. */ + error = -E2BIG; } out: if (klist) @@ -307,6 +325,8 @@ removexattr(struct dentry *d, char __user *name) down(&d->d_inode->i_sem); error = d->d_inode->i_op->removexattr(d, kname); up(&d->d_inode->i_sem); + if (!error) + fsnotify_xattr(d); } out: return error; |
