Fix an Oops in the NFSv4 asynchronous unlink code. The v4

getattr "bitmap" was allocated on the stack.

Make it use the bitmaps already allocated for that purpose
in the nfs_fattr struct.

fs/nfs/nfs4xdr.c

@@ -1333,8 +1333,10 @@ decode_getattr(struct xdr_stream *xdr, struct nfs4_getattr *getattr,
 		dprintk("read_attrs: server returned bad attributes!\n");
 		goto xdr_error;
 	}
-	getattr->gt_bmres[0] = bmval0;
-	getattr->gt_bmres[1] = bmval1;
+	if (nfp) {
+		nfp->bitmap[0] = bmval0;
+		nfp->bitmap[1] = bmval1;
+	}
 
 	/*
 	 * In case the server doesn't return some attributes,

include/linux/nfs_xdr.h

@@ -451,7 +451,6 @@ struct nfs4_getattr {
 	struct nfs_fsstat *		gt_fsstat;         /* response */
 	struct nfs_fsinfo *		gt_fsinfo;         /* response */
 	struct nfs_pathconf *		gt_pathconf;       /* response */
-	u32 *				gt_bmres;	   /* response */
 };
 
 struct nfs4_getfh {