From 5927268f5a04c3b25683e52a0017aa5a9e8eee70 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 23 Mar 2018 10:06:56 -0700 Subject: xfs: flag inode corruption if parent ptr doesn't get us a real inode If a directory's parent inode pointer doesn't point to an inode, the directory should be flagged as corrupt. Enable IGET_UNTRUSTED here so that _iget will return -EINVAL if the inobt does not confirm that the inode is present and allocated and we can flag the directory corruption. Signed-off-by: Darrick J. Wong Reviewed-by: Brian Foster --- fs/xfs/scrub/parent.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'fs/xfs') diff --git a/fs/xfs/scrub/parent.c b/fs/xfs/scrub/parent.c index 0d3851410c74..1fb88c18d455 100644 --- a/fs/xfs/scrub/parent.c +++ b/fs/xfs/scrub/parent.c @@ -167,8 +167,18 @@ xfs_scrub_parent_validate( * if the parent pointer erroneously points to a file, we * can't use DONTCACHE here because DONTCACHE inodes can trigger * immediate inactive cleanup of the inode. + * + * If _iget returns -EINVAL then the parent inode number is garbage + * and the directory is corrupt. If the _iget returns -EFSCORRUPTED + * or -EFSBADCRC then the parent is corrupt which is a cross + * referencing error. Any other error is an operational error. */ - error = xfs_iget(mp, sc->tp, dnum, 0, 0, &dp); + error = xfs_iget(mp, sc->tp, dnum, XFS_IGET_UNTRUSTED, 0, &dp); + if (error == -EINVAL) { + error = -EFSCORRUPTED; + xfs_scrub_fblock_process_error(sc, XFS_DATA_FORK, 0, &error); + goto out; + } if (!xfs_scrub_fblock_xref_process_error(sc, XFS_DATA_FORK, 0, &error)) goto out; if (dp == sc->ip || !S_ISDIR(VFS_I(dp)->i_mode)) { -- cgit v1.2.3