diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2014-10-05 22:56:00 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-14 08:59:58 -0800 |
| commit | 1ae35c4429db5faebb217b4255077b196f14227e (patch) | |
| tree | b3e84d142f141a19c05479e5168e3ebf68fbdf78 /fs/ext4/namei.c | |
| parent | 72cc870f5feeffcedf59ff673071ab4c87dc65fb (diff) | |
ext4: add ext4_iget_normal() which is to be used for dir tree lookups
commit f4bb2981024fc91b23b4d09a8817c415396dbabb upstream.
If there is a corrupted file system which has directory entries that
point at reserved, metadata inodes, prohibit them from being used by
treating them the same way we treat Boot Loader inodes --- that is,
mark them to be bad inodes. This prohibits them from being opened,
deleted, or modified via chmod, chown, utimes, etc.
In particular, this prevents a corrupted file system which has a
directory entry which points at the journal inode from being deleted
and its blocks released, after which point Much Hilarity Ensues.
Reported-by: Sami Liedes <sami.liedes@iki.fi>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ext4/namei.c')
| -rw-r--r-- | fs/ext4/namei.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index d050e043e884..ad36eb36e329 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1429,7 +1429,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi dentry); return ERR_PTR(-EIO); } - inode = ext4_iget(dir->i_sb, ino); + inode = ext4_iget_normal(dir->i_sb, ino); if (inode == ERR_PTR(-ESTALE)) { EXT4_ERROR_INODE(dir, "deleted inode referenced: %u", @@ -1460,7 +1460,7 @@ struct dentry *ext4_get_parent(struct dentry *child) return ERR_PTR(-EIO); } - return d_obtain_alias(ext4_iget(child->d_inode->i_sb, ino)); + return d_obtain_alias(ext4_iget_normal(child->d_inode->i_sb, ino)); } /* |