ext4: add ext4_iget_normal() which is to be used for dir tree lookups

Browse source

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

...

This commit is contained in:

Theodore Ts'o 2014-10-05 22:56:00 -04:00

parent e2bfb088fa

commit f4bb298102

4 changed files with 11 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

fs/ext4/ext4.h

View file

7

fs/ext4/inode.c

View file

4

fs/ext4/namei.c

View file

2

fs/ext4/super.c

View file