diff options
author | Bryan Donlan <bdonlan@gmail.com> | 2009-04-02 23:57:15 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-03 02:04:52 (GMT) |
commit | de18f3b2d68c1f3481839be760a5ff93f6a9a5e5 (patch) | |
tree | 75b4b389baed2c56b1fc94948d1ab42e08ddcdfe /fs | |
parent | 45f902178022439795a21e14f886b8ccb49a75d2 (diff) | |
download | linux-fsl-qoriq-de18f3b2d68c1f3481839be760a5ff93f6a9a5e5.tar.xz |
ext3: return -EIO not -ESTALE on directory traversal through deleted inode
ext3_iget() returns -ESTALE if invoked on a deleted inode, in order to
report errors to NFS properly. However, in ext[234]_lookup(), this
-ESTALE can be propagated to userspace if the filesystem is corrupted such
that a directory entry references a deleted inode. This leads to a
misleading error message - "Stale NFS file handle" - and confusion on the
part of the admin.
The bug can be easily reproduced by creating a new filesystem, making a
link to an unused inode using debugfs, then mounting and attempting to ls
-l said link.
This patch thus changes ext3_lookup to return -EIO if it receives -ESTALE
from ext3_iget(), as ext3 does for other filesystem metadata corruption;
and also invokes the appropriate ext*_error functions when this case is
detected.
Signed-off-by: Bryan Donlan <bdonlan@gmail.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/ext3/namei.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c index bd87a60..6ddaa0a 100644 --- a/fs/ext3/namei.c +++ b/fs/ext3/namei.c @@ -1047,8 +1047,16 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str return ERR_PTR(-EIO); } inode = ext3_iget(dir->i_sb, ino); - if (IS_ERR(inode)) - return ERR_CAST(inode); + if (unlikely(IS_ERR(inode))) { + if (PTR_ERR(inode) == -ESTALE) { + ext3_error(dir->i_sb, __func__, + "deleted inode referenced: %lu", + ino); + return ERR_PTR(-EIO); + } else { + return ERR_CAST(inode); + } + } } return d_splice_alias(inode, dentry); } |