Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d3baf7c4 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs crypto: check context consistent for rename2 



For exchange rename, we should check context consistent of encryption
between new_dir and old_inode or old_dir and new_inode. Otherwise
inheritance of parent's encryption context will be broken.

Signed-off-by: default avatarChao Yu <chao2.yu@samsung.com>
[Jaegeuk Kim: sync with ext4 approach]
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 12377024

fs/f2fs/namei.c

+8 −0
Original line number Diff line number Diff line
@@ -756,6 +756,14 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, 
	int old_nlink = 0, new_nlink = 0;

	int err = -ENOENT;



	if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) &&

		(old_dir != new_dir) &&

		(!f2fs_is_child_context_consistent_with_parent(new_dir,

								old_inode) ||

		!f2fs_is_child_context_consistent_with_parent(old_dir,

								new_inode)))

		return -EPERM;



	f2fs_balance_fs(sbi);



	old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);