1 /* 2 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include "tests.h" 29 #include <asm/unistd.h> 30 #ifdef HAVE_PRCTL 31 # include <sys/prctl.h> 32 #endif 33 34 #if defined HAVE_PRCTL && defined PR_SET_SECCOMP && defined __NR_exit 35 36 # include <stdio.h> 37 # include <unistd.h> 38 39 int 40 main(void) 41 { 42 static const char text1[] = 43 "prctl(PR_SET_SECCOMP, SECCOMP_MODE_STRICT) = 0\n"; 44 static const char text2[] = "+++ exited with 0 +++\n"; 45 46 int rc = prctl(PR_SET_SECCOMP, -1L, 1, 2, 3); 47 printf("prctl(PR_SET_SECCOMP, %#lx /* SECCOMP_MODE_??? */, 0x1, 0x2, 0x3)" 48 " = %d %s (%m)\n", -1L, rc, errno2name()); 49 fflush(stdout); 50 51 rc = prctl(PR_SET_SECCOMP, 1); 52 if (rc) { 53 printf("prctl(PR_SET_SECCOMP, SECCOMP_MODE_STRICT)" 54 " = %d %s (%m)\n", rc, errno2name()); 55 fflush(stdout); 56 rc = 0; 57 } else { 58 /* 59 * If kernel implementaton of SECCOMP_MODE_STRICT is buggy, 60 * the following syscall will result to SIGKILL. 61 */ 62 rc = write(1, text1, LENGTH_OF(text1)) != LENGTH_OF(text1); 63 } 64 65 rc += write(1, text2, LENGTH_OF(text2)) != LENGTH_OF(text2); 66 return !!syscall(__NR_exit, rc); 67 } 68 69 #else 70 71 SKIP_MAIN_UNDEFINED("HAVE_PRCTL && PR_SET_SECCOMP && __NR_exit") 72 73 #endif 74
