1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * Test that there is no value of 'size' which can be passed to copyin 31 * to cause mischief. The somewhat odd order of operations ensures 32 * that we test both size = 0 and size = 0xfff...fff 33 */ 34 #include <sys/types.h> 35 36 37 #if defined(_LP64) 38 #define MAX_BITS 63 39 size_t size; 40 #else 41 #define MAX_BITS 31 42 size_t size; 43 #endif 44 45 syscall::: 46 /pid == $pid/ 47 { 48 printf("size = 0x%lx\n", (ulong_t)size); 49 } 50 51 syscall::: 52 /pid == $pid/ 53 { 54 tracemem(copyin(curthread->t_procp->p_user.u_envp, size), 10); 55 } 56 57 syscall::: 58 /pid == $pid && size > (1 << MAX_BITS)/ 59 { 60 exit(0); 61 } 62 63 syscall::: 64 /pid == $pid/ 65 { 66 size = (size << 1ULL) | 1ULL; 67 } 68