Index: ufs/ufs/ufs_vnops.c
===================================================================
--- ufs/ufs/ufs_vnops.c	(revision 181870)
+++ ufs/ufs/ufs_vnops.c	(working copy)
@@ -326,6 +326,21 @@
 		case VREG:
 			if (vp->v_mount->mnt_flag & MNT_RDONLY)
 				return (EROFS);
+#ifdef QUOTA
+			if (VOP_ISLOCKED(vp, ap->a_td) != LK_EXCLUSIVE) {
+				vhold(vp);
+				vn_lock(vp, LK_UPGRADE | LK_RETRY, ap->a_td);
+				VI_LOCK(vp);
+				vdropl(vp);
+				if (vp->v_iflag & VI_DOOMED) {
+					VI_UNLOCK(vp);
+					return (ENOENT);
+				}
+				VI_UNLOCK(vp);
+			}
+			if ((error = getinoquota(ip)) != 0)
+				return (error);
+#endif
 			break;
 		default:
 			break;