Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Linux Test Project, Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of version 2 of the GNU General Public |
| 6 | * License as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it |
| 13 | * is free of the rightful claim of any third person regarding |
| 14 | * infringement or the like. Any license provided herein, whether |
| 15 | * implied or otherwise, applies only to this software file. Patent |
| 16 | * licenses, if any, provided herein do not apply to combinations of |
| 17 | * this program with other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 22 | * 02110-1301, USA. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * errno tests shared by process_vm_readv, process_vm_writev tests. |
| 27 | */ |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/stat.h> |
| 30 | #include <sys/syscall.h> |
| 31 | #include <sys/uio.h> |
| 32 | #include <sys/wait.h> |
| 33 | #include <sys/mman.h> |
| 34 | #include <errno.h> |
| 35 | #include <signal.h> |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <string.h> |
| 39 | #include <unistd.h> |
| 40 | #include <limits.h> |
| 41 | #include <pwd.h> |
| 42 | #include "config.h" |
| 43 | #include "test.h" |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 44 | #include "safe_macros.h" |
| 45 | #include "process_vm.h" |
| 46 | |
| 47 | struct process_vm_params { |
| 48 | int len; |
| 49 | char *ldummy; |
| 50 | char *rdummy; |
| 51 | pid_t pid; |
| 52 | struct iovec *lvec; |
| 53 | unsigned long liovcnt; |
| 54 | struct iovec *rvec; |
| 55 | unsigned long riovcnt; |
| 56 | unsigned long flags; |
| 57 | }; |
| 58 | |
| 59 | static int rflag; |
| 60 | static int wflag; |
| 61 | |
| 62 | static option_t options[] = { |
| 63 | {"r", &rflag, NULL}, |
| 64 | {"w", &wflag, NULL}, |
| 65 | {NULL, NULL, NULL} |
| 66 | }; |
| 67 | |
| 68 | static char TCID_readv[] = "process_vm_readv"; |
| 69 | static char TCID_writev[] = "process_vm_writev"; |
| 70 | char *TCID = "cma01"; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 71 | int TST_TOTAL = 1; |
| 72 | static void (*cma_test_params) (struct process_vm_params * params) = NULL; |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 73 | |
| 74 | static void setup(char *argv[]); |
| 75 | static void cleanup(void); |
| 76 | static void help(void); |
| 77 | |
| 78 | static void cma_test_params_read(struct process_vm_params *params); |
| 79 | static void cma_test_params_write(struct process_vm_params *params); |
| 80 | static void cma_test_errnos(void); |
| 81 | |
| 82 | int main(int argc, char *argv[]) |
| 83 | { |
| 84 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 85 | const char *msg; |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 86 | |
| 87 | msg = parse_opts(argc, argv, options, &help); |
| 88 | if (msg != NULL) |
| 89 | tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg); |
| 90 | |
| 91 | setup(argv); |
| 92 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
Caspar Zhang | d59a659 | 2013-03-07 14:59:12 +0800 | [diff] [blame] | 93 | tst_count = 0; |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 94 | cma_test_errnos(); |
| 95 | } |
| 96 | cleanup(); |
| 97 | tst_exit(); |
| 98 | } |
| 99 | |
| 100 | static void setup(char *argv[]) |
| 101 | { |
| 102 | tst_require_root(NULL); |
| 103 | |
| 104 | if (rflag && wflag) |
| 105 | tst_brkm(TBROK, NULL, "Parameters -r -w can not be used" |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 106 | " at the same time."); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 107 | else if (rflag) { |
| 108 | TCID = TCID_readv; |
| 109 | #if defined(__NR_process_vm_readv) |
| 110 | cma_test_params = cma_test_params_read; |
| 111 | #else |
| 112 | tst_brkm(TCONF, NULL, "process_vm_readv does not" |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 113 | " exist on your system."); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 114 | #endif |
| 115 | } else if (wflag) { |
| 116 | TCID = TCID_writev; |
| 117 | #if defined(__NR_process_vm_writev) |
| 118 | cma_test_params = cma_test_params_write; |
| 119 | #else |
| 120 | tst_brkm(TCONF, NULL, "process_vm_writev does not" |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 121 | " exist on your system."); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 122 | #endif |
| 123 | } else |
| 124 | tst_brkm(TBROK, NULL, "Parameter missing, required -r or -w."); |
| 125 | TEST_PAUSE; |
| 126 | } |
| 127 | |
| 128 | static void cleanup(void) |
| 129 | { |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | static void help(void) |
| 133 | { |
| 134 | printf(" -r Use process_vm_readv\n"); |
| 135 | printf(" -w Use process_vm_writev\n"); |
| 136 | } |
| 137 | |
| 138 | static void cma_test_params_read(struct process_vm_params *params) |
| 139 | { |
| 140 | TEST(test_process_vm_readv(params->pid, |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 141 | params->lvec, params->liovcnt, |
| 142 | params->rvec, params->riovcnt, |
| 143 | params->flags)); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | static void cma_test_params_write(struct process_vm_params *params) |
| 147 | { |
| 148 | TEST(test_process_vm_writev(params->pid, |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 149 | params->lvec, params->liovcnt, |
| 150 | params->rvec, params->riovcnt, |
| 151 | params->flags)); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | static int cma_check_ret(long expected_ret, long act_ret) |
| 155 | { |
| 156 | if (expected_ret == act_ret) { |
| 157 | tst_resm(TPASS, "expected ret success - " |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 158 | "returned value = %ld", act_ret); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 159 | } else { |
| 160 | tst_resm(TFAIL, "unexpected failure - " |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 161 | "returned value = %ld, expected: %ld", |
| 162 | act_ret, expected_ret); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 163 | return 1; |
| 164 | } |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | static int cma_check_errno(long expected_errno) |
| 169 | { |
| 170 | if (TEST_ERRNO == expected_errno) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 171 | tst_resm(TPASS | TTERRNO, "expected failure"); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 172 | else if (TEST_ERRNO == 0) { |
| 173 | tst_resm(TFAIL, "call succeeded unexpectedly"); |
| 174 | return 1; |
| 175 | } else { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 176 | tst_resm(TFAIL | TTERRNO, "unexpected failure - " |
| 177 | "expected = %ld : %s, actual", |
| 178 | expected_errno, strerror(expected_errno)); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 179 | return 2; |
| 180 | } |
| 181 | return 0; |
| 182 | } |
| 183 | |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 184 | static struct process_vm_params *cma_alloc_sane_params(void) |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 185 | { |
| 186 | struct process_vm_params *sane_params; |
| 187 | int len; |
| 188 | |
| 189 | len = getpagesize(); |
| 190 | sane_params = SAFE_MALLOC(NULL, sizeof(struct process_vm_params)); |
| 191 | sane_params->len = len; |
| 192 | sane_params->ldummy = SAFE_MALLOC(NULL, len); |
| 193 | sane_params->rdummy = SAFE_MALLOC(NULL, len); |
| 194 | |
| 195 | sane_params->lvec = SAFE_MALLOC(NULL, sizeof(struct iovec)); |
| 196 | sane_params->lvec->iov_base = sane_params->ldummy; |
| 197 | sane_params->lvec->iov_len = len; |
| 198 | sane_params->liovcnt = 1; |
| 199 | |
| 200 | sane_params->rvec = SAFE_MALLOC(NULL, sizeof(struct iovec)); |
| 201 | sane_params->rvec->iov_base = sane_params->rdummy; |
| 202 | sane_params->rvec->iov_len = len; |
| 203 | sane_params->riovcnt = 1; |
| 204 | |
| 205 | sane_params->flags = 0; |
| 206 | sane_params->pid = getpid(); |
| 207 | |
| 208 | return sane_params; |
| 209 | } |
| 210 | |
| 211 | static void cma_free_params(struct process_vm_params *params) |
| 212 | { |
| 213 | if (params) { |
| 214 | free(params->ldummy); |
| 215 | free(params->rdummy); |
| 216 | free(params->lvec); |
| 217 | free(params->rvec); |
| 218 | free(params); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | static void cma_test_sane_params(void) |
| 223 | { |
| 224 | struct process_vm_params *sane_params; |
| 225 | |
| 226 | sane_params = cma_alloc_sane_params(); |
| 227 | tst_resm(TINFO, "test_sane_params"); |
| 228 | cma_test_params(sane_params); |
| 229 | cma_check_ret(sane_params->len, TEST_RETURN); |
| 230 | cma_free_params(sane_params); |
| 231 | } |
| 232 | |
| 233 | static void cma_test_flags(void) |
| 234 | { |
| 235 | struct process_vm_params *params; |
| 236 | long flags[] = { -INT_MAX, -1, 1, INT_MAX, 0 }; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 237 | int flags_size = sizeof(flags) / sizeof(flags[0]); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 238 | int i; |
| 239 | |
| 240 | params = cma_alloc_sane_params(); |
| 241 | for (i = 0; i < flags_size; i++) { |
| 242 | params->flags = flags[i]; |
| 243 | tst_resm(TINFO, "test_flags, flags=%ld", flags[i]); |
| 244 | cma_test_params(params); |
| 245 | /* atm. only flags == 0 is allowed, everything else |
| 246 | * should fail with EINVAL */ |
| 247 | if (flags[i] != 0) { |
| 248 | cma_check_ret(-1, TEST_RETURN); |
| 249 | cma_check_errno(EINVAL); |
| 250 | } else { |
| 251 | cma_check_ret(params->len, TEST_RETURN); |
| 252 | } |
| 253 | } |
| 254 | cma_free_params(params); |
| 255 | } |
| 256 | |
| 257 | static void cma_test_iov_len_overflow(void) |
| 258 | { |
| 259 | struct process_vm_params *params; |
| 260 | ssize_t maxlen = -1; |
| 261 | params = cma_alloc_sane_params(); |
| 262 | |
| 263 | params->lvec->iov_len = maxlen; |
| 264 | params->rvec->iov_len = maxlen; |
| 265 | tst_resm(TINFO, "test_iov_len_overflow"); |
| 266 | cma_test_params(params); |
| 267 | cma_check_ret(-1, TEST_RETURN); |
| 268 | cma_check_errno(EINVAL); |
| 269 | cma_free_params(params); |
| 270 | } |
| 271 | |
| 272 | static void cma_test_iov_invalid(void) |
| 273 | { |
| 274 | struct process_vm_params *sane_params; |
| 275 | struct process_vm_params params_copy; |
| 276 | |
| 277 | sane_params = cma_alloc_sane_params(); |
| 278 | /* make a shallow copy we can 'damage' */ |
| 279 | |
| 280 | params_copy = *sane_params; |
| 281 | tst_resm(TINFO, "test_iov_invalid - lvec->iov_base"); |
| 282 | params_copy.lvec->iov_base = (void *)-1; |
| 283 | cma_test_params(¶ms_copy); |
| 284 | cma_check_ret(-1, TEST_RETURN); |
| 285 | cma_check_errno(EFAULT); |
| 286 | |
| 287 | params_copy = *sane_params; |
| 288 | tst_resm(TINFO, "test_iov_invalid - rvec->iov_base"); |
| 289 | params_copy.rvec->iov_base = (void *)-1; |
| 290 | cma_test_params(¶ms_copy); |
| 291 | cma_check_ret(-1, TEST_RETURN); |
| 292 | cma_check_errno(EFAULT); |
| 293 | |
| 294 | params_copy = *sane_params; |
| 295 | tst_resm(TINFO, "test_iov_invalid - lvec"); |
| 296 | params_copy.lvec = (void *)-1; |
| 297 | cma_test_params(¶ms_copy); |
| 298 | cma_check_ret(-1, TEST_RETURN); |
| 299 | cma_check_errno(EFAULT); |
| 300 | |
| 301 | params_copy = *sane_params; |
| 302 | tst_resm(TINFO, "test_iov_invalid - rvec"); |
| 303 | params_copy.rvec = (void *)-1; |
| 304 | cma_test_params(¶ms_copy); |
| 305 | cma_check_ret(-1, TEST_RETURN); |
| 306 | cma_check_errno(EFAULT); |
| 307 | |
| 308 | cma_free_params(sane_params); |
| 309 | } |
| 310 | |
| 311 | static void cma_test_invalid_pid(void) |
| 312 | { |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 313 | pid_t invalid_pid = -1; |
| 314 | struct process_vm_params *params; |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 315 | |
| 316 | params = cma_alloc_sane_params(); |
| 317 | tst_resm(TINFO, "test_invalid_pid"); |
| 318 | params->pid = invalid_pid; |
| 319 | cma_test_params(params); |
| 320 | cma_check_ret(-1, TEST_RETURN); |
| 321 | cma_check_errno(ESRCH); |
| 322 | cma_free_params(params); |
| 323 | |
Stanislav Kholmanskikh | 23b37f3 | 2014-06-30 14:48:24 +0400 | [diff] [blame] | 324 | invalid_pid = tst_get_unused_pid(cleanup); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 325 | |
| 326 | params = cma_alloc_sane_params(); |
| 327 | params->pid = invalid_pid; |
| 328 | cma_test_params(params); |
| 329 | cma_check_ret(-1, TEST_RETURN); |
| 330 | cma_check_errno(ESRCH); |
| 331 | cma_free_params(params); |
| 332 | } |
| 333 | |
| 334 | static void cma_test_invalid_perm(void) |
| 335 | { |
| 336 | char nobody_uid[] = "nobody"; |
| 337 | struct passwd *ltpuser; |
| 338 | int status; |
| 339 | struct process_vm_params *params; |
| 340 | pid_t child_pid; |
| 341 | pid_t parent_pid; |
| 342 | int ret = 0; |
| 343 | |
| 344 | tst_resm(TINFO, "test_invalid_perm"); |
| 345 | parent_pid = getpid(); |
| 346 | child_pid = fork(); |
| 347 | switch (child_pid) { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 348 | case -1: |
| 349 | tst_brkm(TBROK | TERRNO, cleanup, "fork"); |
| 350 | break; |
| 351 | case 0: |
| 352 | ltpuser = getpwnam(nobody_uid); |
| 353 | if (ltpuser == NULL) |
| 354 | tst_brkm(TBROK | TERRNO, NULL, "getpwnam failed"); |
| 355 | if (setuid(ltpuser->pw_uid) == -1) |
| 356 | tst_brkm(TBROK | TERRNO, NULL, |
| 357 | "setuid(%u) failed", ltpuser->pw_uid); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 358 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 359 | params = cma_alloc_sane_params(); |
| 360 | params->pid = parent_pid; |
| 361 | cma_test_params(params); |
| 362 | ret |= cma_check_ret(-1, TEST_RETURN); |
| 363 | ret |= cma_check_errno(EPERM); |
| 364 | cma_free_params(params); |
| 365 | exit(ret); |
| 366 | default: |
| 367 | if (waitpid(child_pid, &status, 0) == -1) |
| 368 | tst_brkm(TBROK | TERRNO, cleanup, "waitpid"); |
| 369 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) |
| 370 | tst_resm(TFAIL, "child returns %d", status); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 371 | } |
| 372 | } |
| 373 | |
| 374 | static void cma_test_invalid_protection(void) |
| 375 | { |
| 376 | struct process_vm_params *sane_params; |
| 377 | struct process_vm_params params_copy; |
| 378 | void *p; |
| 379 | |
| 380 | sane_params = cma_alloc_sane_params(); |
| 381 | /* make a shallow copy we can 'damage' */ |
| 382 | |
| 383 | p = mmap(NULL, getpagesize(), PROT_NONE, |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 384 | MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 385 | if (p == MAP_FAILED) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 386 | tst_brkm(TBROK | TERRNO, cleanup, "mmap"); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 387 | |
| 388 | params_copy = *sane_params; |
| 389 | params_copy.lvec->iov_base = p; |
| 390 | tst_resm(TINFO, "test_invalid_protection lvec"); |
| 391 | cma_test_params(¶ms_copy); |
| 392 | cma_check_ret(-1, TEST_RETURN); |
| 393 | cma_check_errno(EFAULT); |
| 394 | |
| 395 | params_copy = *sane_params; |
| 396 | params_copy.rvec->iov_base = p; |
| 397 | tst_resm(TINFO, "test_invalid_protection rvec"); |
| 398 | cma_test_params(¶ms_copy); |
| 399 | cma_check_ret(-1, TEST_RETURN); |
| 400 | cma_check_errno(EFAULT); |
| 401 | |
| 402 | if (munmap(p, getpagesize()) < 0) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 403 | tst_brkm(TBROK | TERRNO, cleanup, "munmap"); |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 404 | |
| 405 | cma_free_params(sane_params); |
| 406 | } |
| 407 | |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 408 | static void cma_test_errnos(void) |
Jan Stancek | 5d56dd5 | 2012-06-11 16:09:50 +0200 | [diff] [blame] | 409 | { |
| 410 | cma_test_sane_params(); |
| 411 | cma_test_flags(); |
| 412 | cma_test_iov_len_overflow(); |
| 413 | cma_test_iov_invalid(); |
| 414 | cma_test_invalid_pid(); |
| 415 | cma_test_invalid_perm(); |
| 416 | cma_test_invalid_protection(); |
| 417 | } |