Messages in this thread Patch in this message | | | From | Chao Yu <> | Subject | [PATCH 1/3] f2fs crypto: check context consistent for rename2 | Date | Mon, 25 May 2015 18:07:02 +0800 |
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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: Chao Yu <chao2.yu@samsung.com> --- fs/f2fs/namei.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index daed09c..3188464 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -754,6 +754,15 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, int old_nlink = 0, new_nlink = 0; int err = -ENOENT; + if ((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))) { + err = -EPERM; + goto out; + } + f2fs_balance_fs(sbi); old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); -- 2.3.0
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