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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/super.c
parente2bfb088fac03c0f621886a04cffc7faa2b49b1d (diff)
downloadlinux-f4bb2981024fc91b23b4d09a8817c415396dbabb.tar.bz2
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/super.c')
-rw-r--r--fs/ext4/super.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1070d6e521c6..a0811cc00c91 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1001,7 +1001,7 @@ static struct inode *ext4_nfs_get_inode(struct super_block *sb,
* Currently we don't know the generation for parent directory, so
* a generation of 0 means "accept any"
*/
- inode = ext4_iget(sb, ino);
+ inode = ext4_iget_normal(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (generation && inode->i_generation != generation) {