tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 9aaeb87ce1e966169a57f53a02ba05b30880ffb8 commit: 212857cd099510461127f40ae7dc21092d0c0dd1 [10218/10296] selftests: vDSO: ensure vgetrandom works in a time namespace :::::: branch date: 2 days ago :::::: commit date: 2 days ago compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240908/202409080600.YI5mIBVR-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/r/202409080600.YI5mIBVR-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> vdso_test_getrandom.c:281:40: warning: | has lower precedence than ==; == will be evaluated first [-Wparentheses] 281 | else if (WSTOPSIG(status) == SIGTRAP | 0x80) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^ vdso_test_getrandom.c:281:40: note: place parentheses around the '==' expression to silence this warning 281 | else if (WSTOPSIG(status) == SIGTRAP | 0x80) { | ~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ vdso_test_getrandom.c:281:40: note: place parentheses around the | expression to evaluate it first 281 | else if (WSTOPSIG(status) == SIGTRAP | 0x80) { | ~~~~~~~~^~~~~~ 1 warning generated. vim +281 tools/testing/selftests/vDSO/vdso_test_getrandom.c 4920a2590e91bc Jason A. Donenfeld 2024-07-07 241 4920a2590e91bc Jason A. Donenfeld 2024-07-07 242 static void kselftest(void) 4920a2590e91bc Jason A. Donenfeld 2024-07-07 243 { 4920a2590e91bc Jason A. Donenfeld 2024-07-07 244 uint8_t weird_size[1263]; 212857cd099510 Jason A. Donenfeld 2024-09-05 245 pid_t child; 4920a2590e91bc Jason A. Donenfeld 2024-07-07 246 4920a2590e91bc Jason A. Donenfeld 2024-07-07 247 ksft_print_header(); 212857cd099510 Jason A. Donenfeld 2024-09-05 248 ksft_set_plan(2); 4920a2590e91bc Jason A. Donenfeld 2024-07-07 249 4920a2590e91bc Jason A. Donenfeld 2024-07-07 250 for (size_t i = 0; i < 1000; ++i) { 4920a2590e91bc Jason A. Donenfeld 2024-07-07 251 ssize_t ret = vgetrandom(weird_size, sizeof(weird_size), 0); 4920a2590e91bc Jason A. Donenfeld 2024-07-07 252 if (ret != sizeof(weird_size)) 4920a2590e91bc Jason A. Donenfeld 2024-07-07 253 exit(KSFT_FAIL); 4920a2590e91bc Jason A. Donenfeld 2024-07-07 254 } 4920a2590e91bc Jason A. Donenfeld 2024-07-07 255 4920a2590e91bc Jason A. Donenfeld 2024-07-07 256 ksft_test_result_pass("getrandom: PASS\n"); 212857cd099510 Jason A. Donenfeld 2024-09-05 257 212857cd099510 Jason A. Donenfeld 2024-09-05 258 assert(unshare(CLONE_NEWUSER | CLONE_NEWTIME) == 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 259 child = fork(); 212857cd099510 Jason A. Donenfeld 2024-09-05 260 assert(child >= 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 261 if (!child) { 212857cd099510 Jason A. Donenfeld 2024-09-05 262 vgetrandom_init(); 212857cd099510 Jason A. Donenfeld 2024-09-05 263 child = getpid(); 212857cd099510 Jason A. Donenfeld 2024-09-05 264 assert(ptrace(PTRACE_TRACEME, 0, NULL, NULL) == 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 265 assert(kill(child, SIGSTOP) == 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 266 assert(vgetrandom(weird_size, sizeof(weird_size), 0) == sizeof(weird_size)); 212857cd099510 Jason A. Donenfeld 2024-09-05 267 _exit(0); 212857cd099510 Jason A. Donenfeld 2024-09-05 268 } 212857cd099510 Jason A. Donenfeld 2024-09-05 269 for (;;) { 212857cd099510 Jason A. Donenfeld 2024-09-05 270 struct ptrace_syscall_info info = { 0 }; 212857cd099510 Jason A. Donenfeld 2024-09-05 271 int status, ret; 212857cd099510 Jason A. Donenfeld 2024-09-05 272 assert(waitpid(child, &status, 0) >= 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 273 if (WIFEXITED(status)) { 212857cd099510 Jason A. Donenfeld 2024-09-05 274 if (WEXITSTATUS(status) != 0) 212857cd099510 Jason A. Donenfeld 2024-09-05 275 exit(KSFT_FAIL); 212857cd099510 Jason A. Donenfeld 2024-09-05 276 break; 212857cd099510 Jason A. Donenfeld 2024-09-05 277 } 212857cd099510 Jason A. Donenfeld 2024-09-05 278 assert(WIFSTOPPED(status)); 212857cd099510 Jason A. Donenfeld 2024-09-05 279 if (WSTOPSIG(status) == SIGSTOP) 212857cd099510 Jason A. Donenfeld 2024-09-05 280 assert(ptrace(PTRACE_SETOPTIONS, child, 0, PTRACE_O_TRACESYSGOOD) == 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 @281 else if (WSTOPSIG(status) == SIGTRAP | 0x80) { 212857cd099510 Jason A. Donenfeld 2024-09-05 282 assert(ptrace(PTRACE_GET_SYSCALL_INFO, child, sizeof(info), &info) > 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 283 if (info.entry.nr == __NR_getrandom && 212857cd099510 Jason A. Donenfeld 2024-09-05 284 (info.entry.args[0] == (uintptr_t)weird_size && info.entry.args[1] == sizeof(weird_size))) 212857cd099510 Jason A. Donenfeld 2024-09-05 285 exit(KSFT_FAIL); 212857cd099510 Jason A. Donenfeld 2024-09-05 286 } 212857cd099510 Jason A. Donenfeld 2024-09-05 287 assert(ptrace(PTRACE_SYSCALL, child, 0, 0) == 0); 212857cd099510 Jason A. Donenfeld 2024-09-05 288 } 212857cd099510 Jason A. Donenfeld 2024-09-05 289 212857cd099510 Jason A. Donenfeld 2024-09-05 290 ksft_test_result_pass("getrandom timens: PASS\n"); 212857cd099510 Jason A. Donenfeld 2024-09-05 291 4920a2590e91bc Jason A. Donenfeld 2024-07-07 292 exit(KSFT_PASS); 4920a2590e91bc Jason A. Donenfeld 2024-07-07 293 } 4920a2590e91bc Jason A. Donenfeld 2024-07-07 294 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
