tree 7645d062e8808ab71b81b542c388e47d8b78b35f
parent e2bfb088fac03c0f621886a04cffc7faa2b49b1d
author Theodore Ts'o <tytso@mit.edu> 1412564160 -0400
committer Theodore Ts'o <tytso@mit.edu> 1412564160 -0400

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