xfs: don't leak EFSBADCRC to userspace

While the verifier routines may return EFSBADCRC when a buffer has
a bad CRC, we need to translate that to EFSCORRUPTED so that the
higher layers treat the error appropriately and we return a
consistent error to userspace. This fixes a xfs/005 regression.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index 14e58f2..5fda189 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -80,6 +80,10 @@
 		if (error) {
 			xfs_buf_ioerror_alert(bp, __func__);
 			xfs_buf_relse(bp);
+
+			/* bad CRC means corrupted metadata */
+			if (error == EFSBADCRC)
+				error = EFSCORRUPTED;
 			goto out;
 		}
 		byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt);