Mike Frysinger | 50e31fa | 2018-01-19 18:59:49 -0500 | [diff] [blame] | 1 | /* Copyright 2016 The Chromium OS Authors. All rights reserved. |
| 2 | * Use of this source code is governed by a BSD-style license that can be |
| 3 | * found in the LICENSE file. |
| 4 | * |
| 5 | * Test platform independent logic of Minijail using gtest. |
| 6 | */ |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 7 | |
| 8 | #include <errno.h> |
| 9 | |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 10 | #include <dirent.h> |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 11 | #include <fcntl.h> |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 12 | #include <sys/mount.h> |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 13 | #include <sys/stat.h> |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 14 | #include <sys/types.h> |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 15 | #include <sys/wait.h> |
Dylan Reid | 0412dcc | 2017-08-24 11:33:15 -0700 | [diff] [blame] | 16 | #include <unistd.h> |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 17 | |
| 18 | #include <gtest/gtest.h> |
| 19 | |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 20 | #include <functional> |
| 21 | #include <map> |
| 22 | #include <set> |
| 23 | #include <string> |
| 24 | |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 25 | #include "libminijail-private.h" |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 26 | #include "libminijail.h" |
| 27 | #include "scoped_minijail.h" |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 28 | #include "util.h" |
| 29 | |
Mike Frysinger | b2c12d1 | 2017-09-29 21:18:59 -0400 | [diff] [blame] | 30 | namespace { |
| 31 | |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 32 | #if defined(__ANDROID__) |
Mike Frysinger | b2c12d1 | 2017-09-29 21:18:59 -0400 | [diff] [blame] | 33 | # define ROOT_PREFIX "/system" |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 34 | #else |
Mike Frysinger | b2c12d1 | 2017-09-29 21:18:59 -0400 | [diff] [blame] | 35 | # define ROOT_PREFIX "" |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 36 | #endif |
| 37 | |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 38 | constexpr char kShellPath[] = ROOT_PREFIX "/bin/sh"; |
| 39 | constexpr char kCatPath[] = ROOT_PREFIX "/bin/cat"; |
| 40 | constexpr char kPreloadPath[] = "./libminijailpreload.so"; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 41 | constexpr size_t kBufferSize = 128; |
| 42 | |
| 43 | std::set<pid_t> GetProcessSubtreePids(pid_t root_pid) { |
| 44 | std::set<pid_t> pids{root_pid}; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 45 | bool progress = false; |
| 46 | |
| 47 | do { |
| 48 | progress = false; |
| 49 | DIR* d = opendir("/proc"); |
| 50 | if (!d) |
| 51 | pdie("opendir(\"/proc\")"); |
| 52 | |
| 53 | struct dirent* dir_entry; |
| 54 | while ((dir_entry = readdir(d)) != nullptr) { |
| 55 | if (dir_entry->d_type != DT_DIR) |
| 56 | continue; |
| 57 | char* end; |
| 58 | const int pid = strtol(dir_entry->d_name, &end, 10); |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 59 | if (*end != '\0') |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 60 | continue; |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 61 | std::string path = "/proc/" + std::to_string(pid) + "/stat"; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 62 | |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 63 | FILE* f = fopen(path.c_str(), "re"); |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 64 | if (!f) |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 65 | pdie("fopen(%s)", path.c_str()); |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 66 | pid_t ppid; |
| 67 | int ret = fscanf(f, "%*d (%*[^)]) %*c %d", &ppid); |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 68 | fclose(f); |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 69 | if (ret != 1) { |
| 70 | continue; |
| 71 | } |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 72 | if (pids.find(ppid) == pids.end()) |
| 73 | continue; |
| 74 | progress |= pids.insert(pid).second; |
| 75 | } |
| 76 | closedir(d); |
| 77 | } while (progress); |
| 78 | return pids; |
| 79 | } |
| 80 | |
| 81 | std::map<std::string, std::string> GetNamespaces( |
| 82 | pid_t pid, |
| 83 | const std::vector<std::string>& namespace_names) { |
| 84 | std::map<std::string, std::string> namespaces; |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 85 | char buf[kBufferSize]; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 86 | for (const auto& namespace_name : namespace_names) { |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 87 | std::string path = "/proc/" + std::to_string(pid) + "/ns/" + namespace_name; |
| 88 | ssize_t len = readlink(path.c_str(), buf, sizeof(buf)); |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 89 | if (len == -1) |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 90 | pdie("readlink(\"%s\")", path.c_str()); |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 91 | namespaces.emplace(namespace_name, std::string(buf, len)); |
| 92 | } |
| 93 | return namespaces; |
| 94 | } |
Mike Frysinger | b2c12d1 | 2017-09-29 21:18:59 -0400 | [diff] [blame] | 95 | |
| 96 | } // namespace |
| 97 | |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 98 | /* Prototypes needed only by test. */ |
Martin Pelikán | ab9eb44 | 2017-01-25 11:53:58 +1100 | [diff] [blame] | 99 | size_t minijail_get_tmpfs_size(const struct minijail *); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 100 | |
| 101 | /* Silence unused variable warnings. */ |
| 102 | TEST(silence, silence_unused) { |
| 103 | EXPECT_STREQ(kLdPreloadEnvVar, kLdPreloadEnvVar); |
| 104 | EXPECT_STREQ(kFdEnvVar, kFdEnvVar); |
| 105 | EXPECT_STRNE(kFdEnvVar, kLdPreloadEnvVar); |
| 106 | } |
| 107 | |
| 108 | TEST(consumebytes, zero) { |
| 109 | char buf[1024]; |
| 110 | size_t len = sizeof(buf); |
| 111 | char *pos = &buf[0]; |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 112 | EXPECT_NE(nullptr, consumebytes(0, &pos, &len)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 113 | EXPECT_EQ(&buf[0], pos); |
| 114 | EXPECT_EQ(sizeof(buf), len); |
| 115 | } |
| 116 | |
| 117 | TEST(consumebytes, exact) { |
| 118 | char buf[1024]; |
| 119 | size_t len = sizeof(buf); |
| 120 | char *pos = &buf[0]; |
| 121 | /* One past the end since it consumes the whole buffer. */ |
| 122 | char *end = &buf[sizeof(buf)]; |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 123 | EXPECT_NE(nullptr, consumebytes(len, &pos, &len)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 124 | EXPECT_EQ((size_t)0, len); |
| 125 | EXPECT_EQ(end, pos); |
| 126 | } |
| 127 | |
| 128 | TEST(consumebytes, half) { |
| 129 | char buf[1024]; |
| 130 | size_t len = sizeof(buf); |
| 131 | char *pos = &buf[0]; |
| 132 | /* One past the end since it consumes the whole buffer. */ |
| 133 | char *end = &buf[sizeof(buf) / 2]; |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 134 | EXPECT_NE(nullptr, consumebytes(len / 2, &pos, &len)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 135 | EXPECT_EQ(sizeof(buf) / 2, len); |
| 136 | EXPECT_EQ(end, pos); |
| 137 | } |
| 138 | |
| 139 | TEST(consumebytes, toolong) { |
| 140 | char buf[1024]; |
| 141 | size_t len = sizeof(buf); |
| 142 | char *pos = &buf[0]; |
| 143 | /* One past the end since it consumes the whole buffer. */ |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 144 | EXPECT_EQ(nullptr, consumebytes(len + 1, &pos, &len)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 145 | EXPECT_EQ(sizeof(buf), len); |
| 146 | EXPECT_EQ(&buf[0], pos); |
| 147 | } |
| 148 | |
| 149 | TEST(consumestr, zero) { |
| 150 | char buf[1024]; |
| 151 | size_t len = 0; |
| 152 | char *pos = &buf[0]; |
| 153 | memset(buf, 0xff, sizeof(buf)); |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 154 | EXPECT_EQ(nullptr, consumestr(&pos, &len)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 155 | EXPECT_EQ((size_t)0, len); |
| 156 | EXPECT_EQ(&buf[0], pos); |
| 157 | } |
| 158 | |
| 159 | TEST(consumestr, nonul) { |
| 160 | char buf[1024]; |
| 161 | size_t len = sizeof(buf); |
| 162 | char *pos = &buf[0]; |
| 163 | memset(buf, 0xff, sizeof(buf)); |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 164 | EXPECT_EQ(nullptr, consumestr(&pos, &len)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 165 | EXPECT_EQ(sizeof(buf), len); |
| 166 | EXPECT_EQ(&buf[0], pos); |
| 167 | } |
| 168 | |
| 169 | TEST(consumestr, full) { |
| 170 | char buf[1024]; |
| 171 | size_t len = sizeof(buf); |
| 172 | char *pos = &buf[0]; |
| 173 | memset(buf, 0xff, sizeof(buf)); |
| 174 | buf[sizeof(buf)-1] = '\0'; |
| 175 | EXPECT_EQ((void *)buf, consumestr(&pos, &len)); |
| 176 | EXPECT_EQ((size_t)0, len); |
| 177 | EXPECT_EQ(&buf[sizeof(buf)], pos); |
| 178 | } |
| 179 | |
| 180 | TEST(consumestr, trailing_nul) { |
| 181 | char buf[1024]; |
| 182 | size_t len = sizeof(buf) - 1; |
| 183 | char *pos = &buf[0]; |
| 184 | memset(buf, 0xff, sizeof(buf)); |
| 185 | buf[sizeof(buf)-1] = '\0'; |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 186 | EXPECT_EQ(nullptr, consumestr(&pos, &len)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 187 | EXPECT_EQ(sizeof(buf) - 1, len); |
| 188 | EXPECT_EQ(&buf[0], pos); |
| 189 | } |
| 190 | |
| 191 | class MarshalTest : public ::testing::Test { |
| 192 | protected: |
| 193 | virtual void SetUp() { |
| 194 | m_ = minijail_new(); |
| 195 | j_ = minijail_new(); |
| 196 | size_ = minijail_size(m_); |
| 197 | } |
| 198 | virtual void TearDown() { |
| 199 | minijail_destroy(m_); |
| 200 | minijail_destroy(j_); |
| 201 | } |
| 202 | |
| 203 | char buf_[4096]; |
| 204 | struct minijail *m_; |
| 205 | struct minijail *j_; |
| 206 | size_t size_; |
| 207 | }; |
| 208 | |
| 209 | TEST_F(MarshalTest, empty) { |
| 210 | ASSERT_EQ(0, minijail_marshal(m_, buf_, sizeof(buf_))); |
| 211 | EXPECT_EQ(0, minijail_unmarshal(j_, buf_, size_)); |
| 212 | } |
| 213 | |
| 214 | TEST_F(MarshalTest, 0xff) { |
| 215 | memset(buf_, 0xff, sizeof(buf_)); |
| 216 | /* Should fail on the first consumestr since a NUL will never be found. */ |
| 217 | EXPECT_EQ(-EINVAL, minijail_unmarshal(j_, buf_, sizeof(buf_))); |
| 218 | } |
| 219 | |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 220 | TEST(Test, minijail_run_pid_pipes) { |
Luis Hector Chavez | eb42bb7 | 2018-10-15 09:46:29 -0700 | [diff] [blame] | 221 | // TODO(crbug.com/895875): The preload library interferes with ASan since they |
| 222 | // both need to use LD_PRELOAD. |
| 223 | if (running_with_asan()) { |
| 224 | SUCCEED(); |
| 225 | return; |
| 226 | } |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 227 | constexpr char teststr[] = "test\n"; |
| 228 | |
Luis Hector Chavez | eb42bb7 | 2018-10-15 09:46:29 -0700 | [diff] [blame] | 229 | ScopedMinijail j(minijail_new()); |
| 230 | minijail_set_preload_path(j.get(), kPreloadPath); |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 231 | |
| 232 | char* argv[4]; |
| 233 | argv[0] = const_cast<char*>(kCatPath); |
| 234 | argv[1] = nullptr; |
| 235 | pid_t pid; |
| 236 | int child_stdin, child_stdout; |
Luis Hector Chavez | eb42bb7 | 2018-10-15 09:46:29 -0700 | [diff] [blame] | 237 | int mj_run_ret = minijail_run_pid_pipes(j.get(), argv[0], argv, &pid, |
| 238 | &child_stdin, &child_stdout, nullptr); |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 239 | EXPECT_EQ(mj_run_ret, 0); |
| 240 | |
| 241 | const size_t teststr_len = strlen(teststr); |
| 242 | ssize_t write_ret = write(child_stdin, teststr, teststr_len); |
| 243 | EXPECT_EQ(write_ret, static_cast<ssize_t>(teststr_len)); |
| 244 | |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 245 | char buf[kBufferSize]; |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 246 | ssize_t read_ret = read(child_stdout, buf, 8); |
| 247 | EXPECT_EQ(read_ret, static_cast<ssize_t>(teststr_len)); |
| 248 | buf[teststr_len] = 0; |
| 249 | EXPECT_EQ(strcmp(buf, teststr), 0); |
| 250 | |
| 251 | int status; |
| 252 | EXPECT_EQ(kill(pid, SIGTERM), 0); |
| 253 | waitpid(pid, &status, 0); |
| 254 | ASSERT_TRUE(WIFSIGNALED(status)); |
| 255 | EXPECT_EQ(WTERMSIG(status), SIGTERM); |
| 256 | |
| 257 | argv[0] = const_cast<char*>(kShellPath); |
| 258 | argv[1] = "-c"; |
| 259 | argv[2] = "echo test >&2"; |
| 260 | argv[3] = nullptr; |
| 261 | int child_stderr; |
Luis Hector Chavez | eb42bb7 | 2018-10-15 09:46:29 -0700 | [diff] [blame] | 262 | mj_run_ret = minijail_run_pid_pipes(j.get(), argv[0], argv, &pid, |
| 263 | &child_stdin, &child_stdout, |
| 264 | &child_stderr); |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 265 | EXPECT_EQ(mj_run_ret, 0); |
| 266 | |
| 267 | read_ret = read(child_stderr, buf, sizeof(buf)); |
| 268 | EXPECT_GE(read_ret, static_cast<ssize_t>(teststr_len)); |
| 269 | |
| 270 | waitpid(pid, &status, 0); |
| 271 | ASSERT_TRUE(WIFEXITED(status)); |
| 272 | EXPECT_EQ(WEXITSTATUS(status), 0); |
Luis Hector Chavez | 9acba45 | 2018-10-11 10:13:25 -0700 | [diff] [blame] | 273 | } |
| 274 | |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 275 | TEST(Test, minijail_run_pid_pipes_no_preload) { |
| 276 | pid_t pid; |
| 277 | int child_stdin, child_stdout, child_stderr; |
| 278 | int mj_run_ret; |
| 279 | ssize_t write_ret, read_ret; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 280 | char buf[kBufferSize]; |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 281 | int status; |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 282 | char teststr[] = "test\n"; |
| 283 | size_t teststr_len = strlen(teststr); |
| 284 | char *argv[4]; |
| 285 | |
| 286 | struct minijail *j = minijail_new(); |
| 287 | |
Mike Frysinger | b2c12d1 | 2017-09-29 21:18:59 -0400 | [diff] [blame] | 288 | argv[0] = (char*)kCatPath; |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 289 | argv[1] = NULL; |
| 290 | mj_run_ret = minijail_run_pid_pipes_no_preload(j, argv[0], argv, |
| 291 | &pid, |
| 292 | &child_stdin, &child_stdout, |
| 293 | NULL); |
| 294 | EXPECT_EQ(mj_run_ret, 0); |
| 295 | |
| 296 | write_ret = write(child_stdin, teststr, teststr_len); |
| 297 | EXPECT_EQ(write_ret, (int)teststr_len); |
| 298 | |
| 299 | read_ret = read(child_stdout, buf, 8); |
| 300 | EXPECT_EQ(read_ret, (int)teststr_len); |
| 301 | buf[teststr_len] = 0; |
| 302 | EXPECT_EQ(strcmp(buf, teststr), 0); |
| 303 | |
| 304 | EXPECT_EQ(kill(pid, SIGTERM), 0); |
| 305 | waitpid(pid, &status, 0); |
| 306 | ASSERT_TRUE(WIFSIGNALED(status)); |
| 307 | EXPECT_EQ(WTERMSIG(status), SIGTERM); |
| 308 | |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 309 | argv[0] = (char*)kShellPath; |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 310 | argv[1] = "-c"; |
| 311 | argv[2] = "echo test >&2"; |
| 312 | argv[3] = NULL; |
| 313 | mj_run_ret = minijail_run_pid_pipes_no_preload(j, argv[0], argv, &pid, |
| 314 | &child_stdin, &child_stdout, |
| 315 | &child_stderr); |
| 316 | EXPECT_EQ(mj_run_ret, 0); |
| 317 | |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 318 | read_ret = read(child_stderr, buf, sizeof(buf)); |
Jorge Lucangeli Obes | a67bd6a | 2016-08-19 15:33:48 -0400 | [diff] [blame] | 319 | EXPECT_GE(read_ret, (int)teststr_len); |
| 320 | |
| 321 | waitpid(pid, &status, 0); |
| 322 | ASSERT_TRUE(WIFEXITED(status)); |
| 323 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 324 | |
| 325 | minijail_destroy(j); |
| 326 | } |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 327 | |
Jorge Lucangeli Obes | d2c951d | 2019-02-01 15:43:36 -0500 | [diff] [blame] | 328 | TEST(Test, minijail_run_env_pid_pipes_no_preload) { |
| 329 | pid_t pid; |
| 330 | int child_stdin, child_stdout, child_stderr; |
| 331 | int mj_run_ret; |
| 332 | ssize_t read_ret; |
| 333 | char buf[kBufferSize]; |
| 334 | int status; |
| 335 | char test_envvar[] = "TEST_VAR=test"; |
| 336 | size_t testvar_len = strlen("test"); |
| 337 | char *argv[4]; |
| 338 | char *envp[2]; |
| 339 | |
| 340 | struct minijail *j = minijail_new(); |
| 341 | |
| 342 | argv[0] = (char*)kShellPath; |
| 343 | argv[1] = "-c"; |
| 344 | argv[2] = "echo \"${TEST_PARENT+set}|${TEST_VAR}\""; |
| 345 | argv[3] = NULL; |
| 346 | |
| 347 | envp[0] = test_envvar; |
| 348 | envp[1] = NULL; |
| 349 | |
| 350 | // Set a canary env var in the parent that should not be present in the child. |
| 351 | ASSERT_EQ(setenv("TEST_PARENT", "test", 1 /*overwrite*/), 0); |
| 352 | |
| 353 | mj_run_ret = minijail_run_env_pid_pipes_no_preload( |
| 354 | j, argv[0], argv, envp, &pid, &child_stdin, &child_stdout, &child_stderr); |
| 355 | EXPECT_EQ(mj_run_ret, 0); |
| 356 | |
| 357 | read_ret = read(child_stdout, buf, sizeof(buf)); |
Jorge Lucangeli Obes | 8b28541 | 2019-06-03 16:28:16 -0400 | [diff] [blame] | 358 | EXPECT_EQ(read_ret, (int)testvar_len + 2); |
Jorge Lucangeli Obes | d2c951d | 2019-02-01 15:43:36 -0500 | [diff] [blame] | 359 | |
Jorge Lucangeli Obes | 8b28541 | 2019-06-03 16:28:16 -0400 | [diff] [blame] | 360 | EXPECT_EQ("|test\n", std::string(buf, 0, testvar_len + 2)); |
Jorge Lucangeli Obes | d2c951d | 2019-02-01 15:43:36 -0500 | [diff] [blame] | 361 | |
| 362 | EXPECT_EQ(waitpid(pid, &status, 0), pid); |
| 363 | ASSERT_TRUE(WIFEXITED(status)); |
| 364 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 365 | |
| 366 | minijail_destroy(j); |
| 367 | } |
| 368 | |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 369 | TEST(Test, test_minijail_no_fd_leaks) { |
| 370 | pid_t pid; |
| 371 | int child_stdout; |
| 372 | int mj_run_ret; |
| 373 | ssize_t read_ret; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 374 | char buf[kBufferSize]; |
| 375 | char script[kBufferSize]; |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 376 | int status; |
| 377 | char *argv[4]; |
| 378 | |
| 379 | int dev_null = open("/dev/null", O_RDONLY); |
| 380 | ASSERT_NE(dev_null, -1); |
| 381 | snprintf(script, |
| 382 | sizeof(script), |
| 383 | "[ -e /proc/self/fd/%d ] && echo yes || echo no", |
| 384 | dev_null); |
| 385 | |
| 386 | struct minijail *j = minijail_new(); |
| 387 | |
| 388 | argv[0] = (char*)kShellPath; |
| 389 | argv[1] = "-c"; |
| 390 | argv[2] = script; |
| 391 | argv[3] = NULL; |
| 392 | mj_run_ret = minijail_run_pid_pipes_no_preload( |
| 393 | j, argv[0], argv, &pid, NULL, &child_stdout, NULL); |
| 394 | EXPECT_EQ(mj_run_ret, 0); |
| 395 | |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 396 | read_ret = read(child_stdout, buf, sizeof(buf)); |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 397 | EXPECT_GE(read_ret, 0); |
| 398 | buf[read_ret] = '\0'; |
| 399 | EXPECT_STREQ(buf, "yes\n"); |
| 400 | |
| 401 | waitpid(pid, &status, 0); |
| 402 | ASSERT_TRUE(WIFEXITED(status)); |
| 403 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 404 | |
| 405 | minijail_close_open_fds(j); |
| 406 | mj_run_ret = minijail_run_pid_pipes_no_preload( |
| 407 | j, argv[0], argv, &pid, NULL, &child_stdout, NULL); |
| 408 | EXPECT_EQ(mj_run_ret, 0); |
| 409 | |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 410 | read_ret = read(child_stdout, buf, sizeof(buf)); |
Jorge Lucangeli Obes | e9740af | 2016-11-02 13:39:24 -0400 | [diff] [blame] | 411 | EXPECT_GE(read_ret, 0); |
| 412 | buf[read_ret] = '\0'; |
| 413 | EXPECT_STREQ(buf, "no\n"); |
| 414 | |
| 415 | waitpid(pid, &status, 0); |
| 416 | ASSERT_TRUE(WIFEXITED(status)); |
| 417 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 418 | |
| 419 | minijail_destroy(j); |
| 420 | |
| 421 | close(dev_null); |
| 422 | } |
Martin Pelikán | ab9eb44 | 2017-01-25 11:53:58 +1100 | [diff] [blame] | 423 | |
Dylan Reid | 0412dcc | 2017-08-24 11:33:15 -0700 | [diff] [blame] | 424 | TEST(Test, test_minijail_fork) { |
| 425 | pid_t mj_fork_ret; |
| 426 | int status; |
| 427 | int pipe_fds[2]; |
| 428 | ssize_t pid_size = sizeof(mj_fork_ret); |
| 429 | |
Luis Hector Chavez | eb42bb7 | 2018-10-15 09:46:29 -0700 | [diff] [blame] | 430 | ScopedMinijail j(minijail_new()); |
Dylan Reid | 0412dcc | 2017-08-24 11:33:15 -0700 | [diff] [blame] | 431 | |
| 432 | ASSERT_EQ(pipe(pipe_fds), 0); |
| 433 | |
Luis Hector Chavez | eb42bb7 | 2018-10-15 09:46:29 -0700 | [diff] [blame] | 434 | mj_fork_ret = minijail_fork(j.get()); |
Dylan Reid | 0412dcc | 2017-08-24 11:33:15 -0700 | [diff] [blame] | 435 | ASSERT_GE(mj_fork_ret, 0); |
| 436 | if (mj_fork_ret == 0) { |
| 437 | pid_t pid_in_parent; |
| 438 | // Wait for the parent to tell us the pid in the parent namespace. |
Luis Hector Chavez | 7e33301 | 2018-04-05 12:15:27 -0700 | [diff] [blame] | 439 | ASSERT_EQ(read(pipe_fds[0], &pid_in_parent, pid_size), pid_size); |
| 440 | ASSERT_EQ(pid_in_parent, getpid()); |
Dylan Reid | 0412dcc | 2017-08-24 11:33:15 -0700 | [diff] [blame] | 441 | exit(0); |
| 442 | } |
| 443 | |
| 444 | EXPECT_EQ(write(pipe_fds[1], &mj_fork_ret, pid_size), pid_size); |
| 445 | waitpid(mj_fork_ret, &status, 0); |
| 446 | ASSERT_TRUE(WIFEXITED(status)); |
| 447 | EXPECT_EQ(WEXITSTATUS(status), 0); |
Dylan Reid | 0412dcc | 2017-08-24 11:33:15 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Luis Hector Chavez | e0ba4ce | 2017-07-20 15:12:22 -0700 | [diff] [blame] | 450 | static int early_exit(void* payload) { |
| 451 | exit(static_cast<int>(reinterpret_cast<intptr_t>(payload))); |
| 452 | } |
| 453 | |
| 454 | TEST(Test, test_minijail_callback) { |
| 455 | pid_t pid; |
| 456 | int mj_run_ret; |
| 457 | int status; |
Luis Hector Chavez | e0ba4ce | 2017-07-20 15:12:22 -0700 | [diff] [blame] | 458 | char *argv[2]; |
| 459 | int exit_code = 42; |
| 460 | |
| 461 | struct minijail *j = minijail_new(); |
| 462 | |
| 463 | status = |
| 464 | minijail_add_hook(j, &early_exit, reinterpret_cast<void *>(exit_code), |
Jorge Lucangeli Obes | d2c951d | 2019-02-01 15:43:36 -0500 | [diff] [blame] | 465 | MINIJAIL_HOOK_EVENT_PRE_DROP_CAPS); |
Luis Hector Chavez | e0ba4ce | 2017-07-20 15:12:22 -0700 | [diff] [blame] | 466 | EXPECT_EQ(status, 0); |
| 467 | |
Mike Frysinger | b2c12d1 | 2017-09-29 21:18:59 -0400 | [diff] [blame] | 468 | argv[0] = (char*)kCatPath; |
Luis Hector Chavez | e0ba4ce | 2017-07-20 15:12:22 -0700 | [diff] [blame] | 469 | argv[1] = NULL; |
| 470 | mj_run_ret = minijail_run_pid_pipes_no_preload(j, argv[0], argv, &pid, NULL, |
Jorge Lucangeli Obes | d2c951d | 2019-02-01 15:43:36 -0500 | [diff] [blame] | 471 | NULL, NULL); |
Luis Hector Chavez | e0ba4ce | 2017-07-20 15:12:22 -0700 | [diff] [blame] | 472 | EXPECT_EQ(mj_run_ret, 0); |
| 473 | |
| 474 | status = minijail_wait(j); |
| 475 | EXPECT_EQ(status, exit_code); |
| 476 | |
| 477 | minijail_destroy(j); |
| 478 | } |
| 479 | |
Luis Hector Chavez | 1617f63 | 2017-08-01 18:32:30 -0700 | [diff] [blame] | 480 | TEST(Test, test_minijail_preserve_fd) { |
| 481 | int mj_run_ret; |
| 482 | int status; |
Luis Hector Chavez | 1617f63 | 2017-08-01 18:32:30 -0700 | [diff] [blame] | 483 | char *argv[2]; |
| 484 | char teststr[] = "test\n"; |
| 485 | size_t teststr_len = strlen(teststr); |
| 486 | int read_pipe[2]; |
| 487 | int write_pipe[2]; |
| 488 | char buf[1024]; |
| 489 | |
| 490 | struct minijail *j = minijail_new(); |
| 491 | |
| 492 | status = pipe(read_pipe); |
| 493 | ASSERT_EQ(status, 0); |
| 494 | status = pipe(write_pipe); |
| 495 | ASSERT_EQ(status, 0); |
| 496 | |
| 497 | status = minijail_preserve_fd(j, write_pipe[0], STDIN_FILENO); |
| 498 | ASSERT_EQ(status, 0); |
| 499 | status = minijail_preserve_fd(j, read_pipe[1], STDOUT_FILENO); |
| 500 | ASSERT_EQ(status, 0); |
| 501 | minijail_close_open_fds(j); |
| 502 | |
Mike Frysinger | b2c12d1 | 2017-09-29 21:18:59 -0400 | [diff] [blame] | 503 | argv[0] = (char*)kCatPath; |
Luis Hector Chavez | 1617f63 | 2017-08-01 18:32:30 -0700 | [diff] [blame] | 504 | argv[1] = NULL; |
| 505 | mj_run_ret = minijail_run_no_preload(j, argv[0], argv); |
| 506 | EXPECT_EQ(mj_run_ret, 0); |
| 507 | |
| 508 | close(write_pipe[0]); |
| 509 | status = write(write_pipe[1], teststr, teststr_len); |
| 510 | EXPECT_EQ(status, (int)teststr_len); |
| 511 | close(write_pipe[1]); |
| 512 | |
| 513 | close(read_pipe[1]); |
| 514 | status = read(read_pipe[0], buf, 8); |
| 515 | EXPECT_EQ(status, (int)teststr_len); |
| 516 | buf[teststr_len] = 0; |
| 517 | EXPECT_EQ(strcmp(buf, teststr), 0); |
| 518 | |
| 519 | status = minijail_wait(j); |
| 520 | EXPECT_EQ(status, 0); |
| 521 | |
| 522 | minijail_destroy(j); |
| 523 | } |
| 524 | |
Luis Hector Chavez | 7e33301 | 2018-04-05 12:15:27 -0700 | [diff] [blame] | 525 | TEST(Test, test_minijail_reset_signal_mask) { |
| 526 | struct minijail *j = minijail_new(); |
| 527 | |
| 528 | sigset_t original_signal_mask; |
| 529 | { |
| 530 | sigset_t signal_mask; |
| 531 | ASSERT_EQ(0, sigemptyset(&signal_mask)); |
| 532 | ASSERT_EQ(0, sigaddset(&signal_mask, SIGUSR1)); |
| 533 | ASSERT_EQ(0, sigprocmask(SIG_SETMASK, &signal_mask, &original_signal_mask)); |
| 534 | } |
| 535 | |
| 536 | minijail_reset_signal_mask(j); |
| 537 | |
| 538 | pid_t mj_fork_ret = minijail_fork(j); |
| 539 | ASSERT_GE(mj_fork_ret, 0); |
| 540 | if (mj_fork_ret == 0) { |
| 541 | sigset_t signal_mask; |
| 542 | ASSERT_EQ(0, sigprocmask(SIG_SETMASK, NULL, &signal_mask)); |
| 543 | ASSERT_EQ(0, sigismember(&signal_mask, SIGUSR1)); |
Jorge Lucangeli Obes | 1653280 | 2018-05-24 13:03:34 -0400 | [diff] [blame] | 544 | minijail_destroy(j); |
Luis Hector Chavez | 7e33301 | 2018-04-05 12:15:27 -0700 | [diff] [blame] | 545 | exit(0); |
| 546 | } |
| 547 | |
| 548 | ASSERT_EQ(0, sigprocmask(SIG_SETMASK, &original_signal_mask, NULL)); |
| 549 | |
| 550 | int status; |
| 551 | waitpid(mj_fork_ret, &status, 0); |
| 552 | ASSERT_TRUE(WIFEXITED(status)); |
| 553 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 554 | |
| 555 | minijail_destroy(j); |
| 556 | } |
| 557 | |
Luis Hector Chavez | a27118a | 2018-04-04 08:18:01 -0700 | [diff] [blame] | 558 | TEST(Test, test_minijail_reset_signal_handlers) { |
| 559 | struct minijail *j = minijail_new(); |
| 560 | |
| 561 | ASSERT_EQ(SIG_DFL, signal(SIGUSR1, SIG_DFL)); |
| 562 | ASSERT_EQ(SIG_DFL, signal(SIGUSR1, SIG_IGN)); |
| 563 | ASSERT_EQ(SIG_IGN, signal(SIGUSR1, SIG_IGN)); |
| 564 | |
| 565 | minijail_reset_signal_handlers(j); |
| 566 | |
| 567 | pid_t mj_fork_ret = minijail_fork(j); |
| 568 | ASSERT_GE(mj_fork_ret, 0); |
| 569 | if (mj_fork_ret == 0) { |
| 570 | ASSERT_EQ(SIG_DFL, signal(SIGUSR1, SIG_DFL)); |
Jorge Lucangeli Obes | 1653280 | 2018-05-24 13:03:34 -0400 | [diff] [blame] | 571 | minijail_destroy(j); |
Luis Hector Chavez | a27118a | 2018-04-04 08:18:01 -0700 | [diff] [blame] | 572 | exit(0); |
| 573 | } |
| 574 | |
| 575 | ASSERT_NE(SIG_ERR, signal(SIGUSR1, SIG_DFL)); |
| 576 | |
| 577 | int status; |
| 578 | waitpid(mj_fork_ret, &status, 0); |
| 579 | ASSERT_TRUE(WIFEXITED(status)); |
| 580 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 581 | |
| 582 | minijail_destroy(j); |
| 583 | } |
| 584 | |
Mike Frysinger | 780aef7 | 2017-10-03 01:39:52 -0400 | [diff] [blame] | 585 | namespace { |
| 586 | |
| 587 | // Tests that require userns access. |
| 588 | // Android unit tests don't currently support entering user namespaces as |
| 589 | // unprivileged users due to having an older kernel. Chrome OS unit tests |
| 590 | // don't support it either due to being in a chroot environment (see man 2 |
| 591 | // clone for more information about failure modes with the CLONE_NEWUSER flag). |
| 592 | class NamespaceTest : public ::testing::Test { |
| 593 | protected: |
| 594 | static void SetUpTestCase() { |
| 595 | userns_supported_ = UsernsSupported(); |
| 596 | } |
| 597 | |
| 598 | // Whether userns is supported. |
| 599 | static bool userns_supported_; |
| 600 | |
| 601 | static bool UsernsSupported() { |
| 602 | pid_t pid = fork(); |
| 603 | if (pid == -1) |
| 604 | pdie("could not fork"); |
| 605 | |
| 606 | if (pid == 0) |
| 607 | _exit(unshare(CLONE_NEWUSER) == 0 ? 0 : 1); |
| 608 | |
| 609 | int status; |
| 610 | if (waitpid(pid, &status, 0) < 0) |
| 611 | pdie("could not wait"); |
| 612 | |
| 613 | if (!WIFEXITED(status)) |
| 614 | die("child did not exit properly: %#x", status); |
| 615 | |
| 616 | bool ret = WEXITSTATUS(status) == 0; |
| 617 | if (!ret) |
| 618 | warn("Skipping userns related tests"); |
| 619 | return ret; |
| 620 | } |
| 621 | }; |
| 622 | |
| 623 | bool NamespaceTest::userns_supported_; |
| 624 | |
| 625 | } // namespace |
| 626 | |
| 627 | TEST_F(NamespaceTest, test_tmpfs_userns) { |
Luis Hector Chavez | 7132355 | 2017-09-05 09:17:22 -0700 | [diff] [blame] | 628 | int mj_run_ret; |
| 629 | int status; |
| 630 | char *argv[4]; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 631 | char uidmap[kBufferSize], gidmap[kBufferSize]; |
Luis Hector Chavez | 7132355 | 2017-09-05 09:17:22 -0700 | [diff] [blame] | 632 | constexpr uid_t kTargetUid = 1000; // Any non-zero value will do. |
| 633 | constexpr gid_t kTargetGid = 1000; |
| 634 | |
Mike Frysinger | 780aef7 | 2017-10-03 01:39:52 -0400 | [diff] [blame] | 635 | if (!userns_supported_) { |
| 636 | SUCCEED(); |
| 637 | return; |
| 638 | } |
| 639 | |
Luis Hector Chavez | 7132355 | 2017-09-05 09:17:22 -0700 | [diff] [blame] | 640 | struct minijail *j = minijail_new(); |
| 641 | |
| 642 | minijail_namespace_pids(j); |
| 643 | minijail_namespace_vfs(j); |
| 644 | minijail_mount_tmp(j); |
| 645 | minijail_run_as_init(j); |
| 646 | |
| 647 | // Perform userns mapping. |
| 648 | minijail_namespace_user(j); |
| 649 | snprintf(uidmap, sizeof(uidmap), "%d %d 1", kTargetUid, getuid()); |
| 650 | snprintf(gidmap, sizeof(gidmap), "%d %d 1", kTargetGid, getgid()); |
| 651 | minijail_change_uid(j, kTargetUid); |
| 652 | minijail_change_gid(j, kTargetGid); |
| 653 | minijail_uidmap(j, uidmap); |
| 654 | minijail_gidmap(j, gidmap); |
| 655 | minijail_namespace_user_disable_setgroups(j); |
| 656 | |
| 657 | argv[0] = (char*)kShellPath; |
| 658 | argv[1] = "-c"; |
| 659 | argv[2] = "exec touch /tmp/foo"; |
| 660 | argv[3] = NULL; |
| 661 | mj_run_ret = minijail_run_no_preload(j, argv[0], argv); |
| 662 | EXPECT_EQ(mj_run_ret, 0); |
| 663 | |
| 664 | status = minijail_wait(j); |
| 665 | EXPECT_EQ(status, 0); |
| 666 | |
| 667 | minijail_destroy(j); |
| 668 | } |
| 669 | |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 670 | TEST_F(NamespaceTest, test_namespaces) { |
| 671 | constexpr char teststr[] = "test\n"; |
| 672 | |
Luis Hector Chavez | eb42bb7 | 2018-10-15 09:46:29 -0700 | [diff] [blame] | 673 | // TODO(crbug.com/895875): The preload library interferes with ASan since they |
| 674 | // both need to use LD_PRELOAD. |
| 675 | if (!userns_supported_ || running_with_asan()) { |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 676 | SUCCEED(); |
| 677 | return; |
| 678 | } |
| 679 | |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 680 | std::string uidmap = "0 " + std::to_string(getuid()) + " 1"; |
| 681 | std::string gidmap = "0 " + std::to_string(getgid()) + " 1"; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 682 | |
Luis Hector Chavez | 83a4489 | 2018-10-12 08:56:20 -0700 | [diff] [blame] | 683 | const std::vector<std::string> namespace_names = {"pid", "mnt", "user", |
| 684 | "net", "cgroup", "uts"}; |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 685 | // Grab the set of namespaces outside the container. |
| 686 | std::map<std::string, std::string> init_namespaces = |
| 687 | GetNamespaces(getpid(), namespace_names); |
| 688 | std::function<void(struct minijail*)> test_functions[] = { |
| 689 | [](struct minijail* j attribute_unused) {}, |
| 690 | [](struct minijail* j) { |
| 691 | minijail_mount(j, "/", "/", "", MS_BIND | MS_REC | MS_RDONLY); |
| 692 | minijail_enter_pivot_root(j, "/tmp"); |
| 693 | }, |
| 694 | [](struct minijail* j) { minijail_enter_chroot(j, "/"); }, |
| 695 | }; |
| 696 | |
| 697 | // This test is run with and without the preload library. |
| 698 | for (const auto& run_function : |
| 699 | {minijail_run_pid_pipes, minijail_run_pid_pipes_no_preload}) { |
| 700 | for (const auto& test_function : test_functions) { |
| 701 | ScopedMinijail j(minijail_new()); |
| 702 | minijail_set_preload_path(j.get(), kPreloadPath); |
| 703 | |
| 704 | // Enter all the namespaces we can. |
| 705 | minijail_namespace_cgroups(j.get()); |
| 706 | minijail_namespace_net(j.get()); |
| 707 | minijail_namespace_pids(j.get()); |
| 708 | minijail_namespace_user(j.get()); |
| 709 | minijail_namespace_vfs(j.get()); |
| 710 | minijail_namespace_uts(j.get()); |
| 711 | |
Luis Hector Chavez | ac0acf3 | 2018-10-15 09:45:01 -0700 | [diff] [blame] | 712 | // Set up the user namespace. |
| 713 | minijail_uidmap(j.get(), uidmap.c_str()); |
| 714 | minijail_gidmap(j.get(), gidmap.c_str()); |
Luis Hector Chavez | 86e10d3 | 2018-10-11 20:36:48 -0700 | [diff] [blame] | 715 | minijail_namespace_user_disable_setgroups(j.get()); |
| 716 | |
| 717 | minijail_close_open_fds(j.get()); |
| 718 | test_function(j.get()); |
| 719 | |
| 720 | const char* argv[] = {kCatPath, nullptr}; |
| 721 | pid_t container_pid; |
| 722 | int child_stdin, child_stdout; |
| 723 | int mj_run_ret = |
| 724 | run_function(j.get(), argv[0], const_cast<char* const*>(argv), |
| 725 | &container_pid, &child_stdin, &child_stdout, nullptr); |
| 726 | EXPECT_EQ(mj_run_ret, 0); |
| 727 | |
| 728 | // Send some data to stdin and read it back to ensure that the child |
| 729 | // process is running. |
| 730 | const size_t teststr_len = strlen(teststr); |
| 731 | ssize_t write_ret = write(child_stdin, teststr, teststr_len); |
| 732 | EXPECT_EQ(write_ret, static_cast<ssize_t>(teststr_len)); |
| 733 | |
| 734 | char buf[kBufferSize]; |
| 735 | ssize_t read_ret = read(child_stdout, buf, 8); |
| 736 | EXPECT_EQ(read_ret, static_cast<ssize_t>(teststr_len)); |
| 737 | buf[teststr_len] = 0; |
| 738 | EXPECT_EQ(strcmp(buf, teststr), 0); |
| 739 | |
| 740 | // Grab the set of namespaces in every container process. They must not |
| 741 | // match the ones in the init namespace, and they must all match each |
| 742 | // other. |
| 743 | std::map<std::string, std::string> container_namespaces = |
| 744 | GetNamespaces(container_pid, namespace_names); |
| 745 | EXPECT_NE(container_namespaces, init_namespaces); |
| 746 | for (pid_t pid : GetProcessSubtreePids(container_pid)) |
| 747 | EXPECT_EQ(container_namespaces, GetNamespaces(pid, namespace_names)); |
| 748 | |
| 749 | EXPECT_EQ(0, close(child_stdin)); |
| 750 | |
| 751 | int status = minijail_wait(j.get()); |
| 752 | EXPECT_EQ(status, 0); |
| 753 | } |
| 754 | } |
| 755 | } |
| 756 | |
Mike Frysinger | 902a449 | 2018-12-27 05:22:56 -0500 | [diff] [blame] | 757 | TEST_F(NamespaceTest, test_enter_ns) { |
| 758 | char uidmap[kBufferSize], gidmap[kBufferSize]; |
| 759 | |
| 760 | if (!userns_supported_) { |
| 761 | SUCCEED(); |
| 762 | return; |
| 763 | } |
| 764 | |
| 765 | // We first create a child in a new userns so we have privs to run more tests. |
| 766 | // We can't combine the steps as the kernel disallows many resource sharing |
| 767 | // from outside the userns. |
| 768 | struct minijail *j = minijail_new(); |
| 769 | |
| 770 | minijail_namespace_vfs(j); |
| 771 | minijail_namespace_pids(j); |
| 772 | minijail_run_as_init(j); |
| 773 | |
| 774 | // Perform userns mapping. |
| 775 | minijail_namespace_user(j); |
| 776 | snprintf(uidmap, sizeof(uidmap), "0 %d 1", getuid()); |
| 777 | snprintf(gidmap, sizeof(gidmap), "0 %d 1", getgid()); |
| 778 | minijail_uidmap(j, uidmap); |
| 779 | minijail_gidmap(j, gidmap); |
| 780 | minijail_namespace_user_disable_setgroups(j); |
| 781 | |
| 782 | pid_t pid = minijail_fork(j); |
| 783 | if (pid == 0) { |
| 784 | // Child. |
| 785 | minijail_destroy(j); |
| 786 | |
| 787 | // Create new namespaces inside this userns which we may enter. |
| 788 | j = minijail_new(); |
| 789 | minijail_namespace_net(j); |
| 790 | minijail_namespace_vfs(j); |
| 791 | pid = minijail_fork(j); |
| 792 | if (pid == 0) { |
| 793 | // Child. |
| 794 | minijail_destroy(j); |
| 795 | |
| 796 | // Finally enter those namespaces. |
| 797 | j = minijail_new(); |
| 798 | |
| 799 | // We need to get the absolute path because entering a new mntns will |
| 800 | // implicitly chdir(/) for us. |
| 801 | char *path = realpath(kPreloadPath, nullptr); |
| 802 | ASSERT_NE(nullptr, path); |
| 803 | minijail_set_preload_path(j, path); |
| 804 | |
| 805 | minijail_namespace_net(j); |
| 806 | minijail_namespace_vfs(j); |
| 807 | |
| 808 | minijail_namespace_enter_net(j, "/proc/self/ns/net"); |
| 809 | minijail_namespace_enter_vfs(j, "/proc/self/ns/mnt"); |
| 810 | |
| 811 | char *argv[] = {"/bin/true", nullptr}; |
| 812 | EXPECT_EQ(0, minijail_run(j, argv[0], argv)); |
| 813 | EXPECT_EQ(0, minijail_wait(j)); |
| 814 | minijail_destroy(j); |
| 815 | exit(0); |
| 816 | } else { |
| 817 | ASSERT_GT(pid, 0); |
| 818 | EXPECT_EQ(0, minijail_wait(j)); |
| 819 | minijail_destroy(j); |
| 820 | exit(0); |
| 821 | } |
| 822 | } else { |
| 823 | ASSERT_GT(pid, 0); |
| 824 | EXPECT_EQ(0, minijail_wait(j)); |
| 825 | minijail_destroy(j); |
| 826 | } |
| 827 | } |
| 828 | |
Martin Pelikán | ab9eb44 | 2017-01-25 11:53:58 +1100 | [diff] [blame] | 829 | TEST(Test, parse_size) { |
| 830 | size_t size; |
| 831 | |
| 832 | ASSERT_EQ(0, parse_size(&size, "42")); |
| 833 | ASSERT_EQ(42U, size); |
| 834 | |
| 835 | ASSERT_EQ(0, parse_size(&size, "16K")); |
| 836 | ASSERT_EQ(16384U, size); |
| 837 | |
| 838 | ASSERT_EQ(0, parse_size(&size, "1M")); |
| 839 | ASSERT_EQ(1024U * 1024, size); |
| 840 | |
| 841 | uint64_t gigabyte = 1024ULL * 1024 * 1024; |
| 842 | ASSERT_EQ(0, parse_size(&size, "3G")); |
| 843 | ASSERT_EQ(3U, size / gigabyte); |
| 844 | ASSERT_EQ(0U, size % gigabyte); |
| 845 | |
| 846 | ASSERT_EQ(0, parse_size(&size, "4294967294")); |
| 847 | ASSERT_EQ(3U, size / gigabyte); |
| 848 | ASSERT_EQ(gigabyte - 2, size % gigabyte); |
| 849 | |
| 850 | #if __WORDSIZE == 64 |
| 851 | uint64_t exabyte = gigabyte * 1024 * 1024 * 1024; |
| 852 | ASSERT_EQ(0, parse_size(&size, "9E")); |
| 853 | ASSERT_EQ(9U, size / exabyte); |
| 854 | ASSERT_EQ(0U, size % exabyte); |
| 855 | |
| 856 | ASSERT_EQ(0, parse_size(&size, "15E")); |
| 857 | ASSERT_EQ(15U, size / exabyte); |
| 858 | ASSERT_EQ(0U, size % exabyte); |
| 859 | |
| 860 | ASSERT_EQ(0, parse_size(&size, "18446744073709551614")); |
| 861 | ASSERT_EQ(15U, size / exabyte); |
| 862 | ASSERT_EQ(exabyte - 2, size % exabyte); |
| 863 | |
| 864 | ASSERT_EQ(-ERANGE, parse_size(&size, "16E")); |
| 865 | ASSERT_EQ(-ERANGE, parse_size(&size, "19E")); |
Chirantan Ekbote | 8c13d10 | 2017-02-09 12:33:19 -0800 | [diff] [blame] | 866 | ASSERT_EQ(-EINVAL, parse_size(&size, "7GTPE")); |
Martin Pelikán | ab9eb44 | 2017-01-25 11:53:58 +1100 | [diff] [blame] | 867 | #elif __WORDSIZE == 32 |
| 868 | ASSERT_EQ(-ERANGE, parse_size(&size, "5G")); |
| 869 | ASSERT_EQ(-ERANGE, parse_size(&size, "9G")); |
| 870 | ASSERT_EQ(-ERANGE, parse_size(&size, "9E")); |
Chirantan Ekbote | 8c13d10 | 2017-02-09 12:33:19 -0800 | [diff] [blame] | 871 | ASSERT_EQ(-ERANGE, parse_size(&size, "7GTPE")); |
Martin Pelikán | ab9eb44 | 2017-01-25 11:53:58 +1100 | [diff] [blame] | 872 | #endif |
| 873 | |
| 874 | ASSERT_EQ(-EINVAL, parse_size(&size, "")); |
| 875 | ASSERT_EQ(-EINVAL, parse_size(&size, "14u")); |
| 876 | ASSERT_EQ(-EINVAL, parse_size(&size, "14.2G")); |
Martin Pelikán | ab9eb44 | 2017-01-25 11:53:58 +1100 | [diff] [blame] | 877 | ASSERT_EQ(-EINVAL, parse_size(&size, "-1G")); |
| 878 | ASSERT_EQ(-EINVAL, parse_size(&size, "; /bin/rm -- ")); |
| 879 | } |
Xiyuan Xia | 9b41e65 | 2019-05-23 11:03:04 -0700 | [diff] [blame] | 880 | |
| 881 | void TestCreateSession(bool create_session) { |
| 882 | int status; |
| 883 | int pipe_fds[2]; |
| 884 | pid_t child_pid; |
| 885 | pid_t parent_sid = getsid(0); |
| 886 | ssize_t pid_size = sizeof(pid_t); |
| 887 | |
| 888 | ScopedMinijail j(minijail_new()); |
| 889 | // stdin/stdout/stderr might be attached to TTYs. Close them to avoid creating |
| 890 | // a new session because of that. |
| 891 | minijail_close_open_fds(j.get()); |
| 892 | |
| 893 | if (create_session) |
| 894 | minijail_create_session(j.get()); |
| 895 | |
| 896 | ASSERT_EQ(pipe(pipe_fds), 0); |
| 897 | minijail_preserve_fd(j.get(), pipe_fds[0], pipe_fds[0]); |
| 898 | |
| 899 | child_pid = minijail_fork(j.get()); |
| 900 | ASSERT_GE(child_pid, 0); |
| 901 | if (child_pid == 0) { |
| 902 | pid_t sid_in_parent; |
| 903 | ASSERT_EQ(read(pipe_fds[0], &sid_in_parent, pid_size), pid_size); |
| 904 | if (create_session) |
| 905 | ASSERT_NE(sid_in_parent, getsid(0)); |
| 906 | else |
| 907 | ASSERT_EQ(sid_in_parent, getsid(0)); |
| 908 | exit(0); |
| 909 | } |
| 910 | |
| 911 | EXPECT_EQ(write(pipe_fds[1], &parent_sid, pid_size), pid_size); |
| 912 | waitpid(child_pid, &status, 0); |
| 913 | ASSERT_TRUE(WIFEXITED(status)); |
| 914 | EXPECT_EQ(WEXITSTATUS(status), 0); |
| 915 | } |
| 916 | |
| 917 | TEST(Test, default_no_new_session) { |
| 918 | TestCreateSession(/*create_session=*/false); |
| 919 | } |
| 920 | |
| 921 | TEST(Test, create_new_session) { |
| 922 | TestCreateSession(/*create_session=*/true); |
| 923 | } |