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authorTheodore Ts'o <tytso@mit.edu>2014-10-05 22:56:00 -0400
committerTheodore Ts'o <tytso@mit.edu>2014-10-05 22:56:00 -0400
commitf4bb2981024fc91b23b4d09a8817c415396dbabb (patch)
tree7645d062e8808ab71b81b542c388e47d8b78b35f /fs/ext4/namei.c
parente2bfb088fac03c0f621886a04cffc7faa2b49b1d (diff)
downloadop-kernel-dev-f4bb2981024fc91b23b4d09a8817c415396dbabb.zip
op-kernel-dev-f4bb2981024fc91b23b4d09a8817c415396dbabb.tar.gz
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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index a2a9d40..7037ecf 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));
}
/*
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