1/* 2 * Check decoding of setfsuid/setfsgid/setfsuid32/setfsgid32 syscalls. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#include <stdio.h> 31#include <unistd.h> 32 33void 34printuid(unsigned UGID_TYPE id) 35{ 36 if (id == (unsigned UGID_TYPE) -1U) 37 printf("-1"); 38 else 39 printf("%u", id); 40} 41 42int 43main(void) 44{ 45 unsigned int ugid = GETUGID; 46 47 const kernel_ulong_t tests[] = { 48 ugid, 49 0xffff0000U | ugid, 50 (kernel_ulong_t) 0xffffffff00000000ULL | ugid, 51 0xffffU, 52 -1U, 53 -1L, 54 0xc0deffffU, 55 0xfacefeedU, 56 (long) 0xfacefeeddeadbeefULL 57 }; 58 59 unsigned int i; 60 61 for (i = 0; i < ARRAY_SIZE(tests); ++i) { 62 const unsigned int num = (unsigned UGID_TYPE) tests[i]; 63 unsigned int rc; 64 65 rc = syscall(SYSCALL_NR, tests[i]); 66 printf("%s(", SYSCALL_NAME); 67 printuid(num); 68 printf(") = %u\n", rc); 69 70 rc = syscall(SYSCALL_NR, ugid); 71 printf("%s(%u) = %u\n", SYSCALL_NAME, ugid, rc); 72 } 73 74 puts("+++ exited with 0 +++"); 75 return 0; 76} 77