--- 2830b415e2147ecfda36acc99d620408472128bd
+++ c49865b30719d2e8113313591834f34d4d5fa063
@@ -526,7 +526,7 @@ int copy_thread(unsigned long clone_flag
 			 * Set some valid stack frames to give to the child.
 			 */
 			childstack = (struct sparc_stackf __user *)
-				(sp & ~0x7UL);
+				(sp & ~0xfUL);
 			parentstack = (struct sparc_stackf __user *)
 				regs->u_regs[UREG_FP];