diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2014-10-06 04:56:00 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-10-06 04:56:00 +0200 |
| commit | f4bb2981024fc91b23b4d09a8817c415396dbabb (patch) | |
| tree | 7645d062e8808ab71b81b542c388e47d8b78b35f /fs/ext4/namei.c | |
| parent | ext4: don't orphan or truncate the boot loader inode (diff) | |
| download | linux-f4bb2981024fc91b23b4d09a8817c415396dbabb.tar.xz linux-f4bb2981024fc91b23b4d09a8817c415396dbabb.zip | |
ext4: add ext4_iget_normal() which is to be used for dir tree lookups
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>
Cc: stable@vger.kernel.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 a2a9d40522d2..7037ecf0fc23 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1417,7 +1417,7 @@ 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", @@ -1450,7 +1450,7 @@ 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)); } /* |