提交 2f26afba 编写于 作者: S Shi Weihua 提交者: Chris Mason

Btrfs: should add a permission check for setfacl

On btrfs, do the following
------------------
# su user1
# cd btrfs-part/
# touch aaa
# getfacl aaa
  # file: aaa
  # owner: user1
  # group: user1
  user::rw-
  group::rw-
  other::r--
# su user2
# cd btrfs-part/
# setfacl -m u::rwx aaa
# getfacl aaa
  # file: aaa
  # owner: user1
  # group: user1
  user::rwx           <- successed to setfacl
  group::rw-
  other::r--
------------------
but we should prohibit it that user2 changing user1's acl.
In fact, on ext3 and other fs, a message occurs:
  setfacl: aaa: Operation not permitted

This patch fixed it.
Signed-off-by: NShi Weihua <shiwh@cn.fujitsu.com>
Signed-off-by: NChris Mason <chris.mason@oracle.com>
上级 cf1e99a4
......@@ -160,6 +160,9 @@ static int btrfs_xattr_acl_set(struct dentry *dentry, const char *name,
int ret;
struct posix_acl *acl = NULL;
if (!is_owner_or_cap(dentry->d_inode))
return -EPERM;
if (value) {
acl = posix_acl_from_xattr(value, size);
if (acl == NULL) {
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册