diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c
index 9aff694e83fc..fee8012973f3 100644
--- a/sys/ufs/ffs/ffs_vfsops.c
+++ b/sys/ufs/ffs/ffs_vfsops.c
@@ -1064,7 +1064,7 @@ ffs_mountfs(devvp, mp, td)
 	 */
 	MNT_ILOCK(mp);
 	mp->mnt_kern_flag |= MNTK_MPSAFE | MNTK_LOOKUP_SHARED |
-	    MNTK_EXTENDED_SHARED;
+	    MNTK_EXTENDED_SHARED | MNTK_NO_IOPF;
 	MNT_IUNLOCK(mp);
 #ifdef UFS_EXTATTR
 #ifdef UFS_EXTATTR_AUTOSTART
diff --git a/sys/ufs/ffs/ffs_vnops.c b/sys/ufs/ffs/ffs_vnops.c
index 0699eef37b8e..6259911b8392 100644
--- a/sys/ufs/ffs/ffs_vnops.c
+++ b/sys/ufs/ffs/ffs_vnops.c
@@ -567,7 +567,7 @@ ffs_read(ap)
 			xfersize = size;
 		}
 
-		error = uiomove((char *)bp->b_data + blkoffset,
+		error = vn_io_fault_uiomove((char *)bp->b_data + blkoffset,
 		    (int)xfersize, uio);
 		if (error)
 			break;
@@ -738,8 +738,8 @@ ffs_write(ap)
 		if (size < xfersize)
 			xfersize = size;
 
-		error =
-		    uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio);
+		error = vn_io_fault_uiomove((char *)bp->b_data + blkoffset,
+		    (int)xfersize, uio);
 		/*
 		 * If the buffer is not already filled and we encounter an
 		 * error while trying to fill it, we have to clear out any