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| author | Chao Yu <chao2.yu@samsung.com> | 2015-05-25 18:07:02 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-06-01 16:21:05 -0700 |
| commit | d3baf7c4725601d4689397b9f7dde9e3ddea032d (patch) | |
| tree | 5ad0bae1f48ef76cdcdcdc4cb04b707610d9c26c /fs/f2fs/namei.c | |
| parent | 12377024719f08b7411afe9fc0169b13808dfefa (diff) | |
| download | linux-d3baf7c4725601d4689397b9f7dde9e3ddea032d.tar.gz linux-d3baf7c4725601d4689397b9f7dde9e3ddea032d.tar.bz2 linux-d3baf7c4725601d4689397b9f7dde9e3ddea032d.zip | |
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: Chao Yu <chao2.yu@samsung.com>
[Jaegeuk Kim: sync with ext4 approach]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/namei.c')
| -rw-r--r-- | fs/f2fs/namei.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 55d0d27dfdf2..1cc24a0cbc58 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -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); |