diff mbox series

[2/3] xfs: mark extended attr corrupt when lookup-by-hash fails

Message ID 158388769356.939608.4585090255151116523.stgit@magnolia (mailing list archive)
State Accepted
Headers show
Series xfs: fix errors in attr/directory scrubbers | expand

Commit Message

Darrick J. Wong March 11, 2020, 12:48 a.m. UTC
From: Darrick J. Wong <darrick.wong@oracle.com>

In xchk_xattr_listent, we attempt to validate the extended attribute
hash structures by performing a attr lookup by (hashed) name.  If the
lookup returns ENODATA, that means that the hash information is corrupt.
The _process_error functions don't catch this, so we have to add that
explicitly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/scrub/attr.c |    3 +++
 1 file changed, 3 insertions(+)

Comments

Dave Chinner March 11, 2020, 5:53 a.m. UTC | #1
On Tue, Mar 10, 2020 at 05:48:13PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <darrick.wong@oracle.com>
> 
> In xchk_xattr_listent, we attempt to validate the extended attribute
> hash structures by performing a attr lookup by (hashed) name.  If the
> lookup returns ENODATA, that means that the hash information is corrupt.
> The _process_error functions don't catch this, so we have to add that
> explicitly.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
> ---
>  fs/xfs/scrub/attr.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> 
> diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
> index d9f0dd444b80..941c09bafb35 100644
> --- a/fs/xfs/scrub/attr.c
> +++ b/fs/xfs/scrub/attr.c
> @@ -163,6 +163,9 @@ xchk_xattr_listent(
>  	args.valuelen = valuelen;
>  
>  	error = xfs_attr_get_ilocked(context->dp, &args);
> +	/* ENODATA means the hash lookup failed and the attr is bad */
> +	if (error == -ENODATA)
> +		error = -EFSCORRUPTED;
>  	if (!xchk_fblock_process_error(sx->sc, XFS_ATTR_FORK, args.blkno,
>  			&error))
>  		goto fail_xref;

Much nicer than the previous iteration :)

Reviewed-by: Dave Chinner <dchinner@redhat.com>
diff mbox series

Patch

diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
index d9f0dd444b80..941c09bafb35 100644
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -163,6 +163,9 @@  xchk_xattr_listent(
 	args.valuelen = valuelen;
 
 	error = xfs_attr_get_ilocked(context->dp, &args);
+	/* ENODATA means the hash lookup failed and the attr is bad */
+	if (error == -ENODATA)
+		error = -EFSCORRUPTED;
 	if (!xchk_fblock_process_error(sx->sc, XFS_ATTR_FORK, args.blkno,
 			&error))
 		goto fail_xref;