summaryrefslogtreecommitdiffhomepage
path: root/test/syscalls/linux/prctl.cc
diff options
context:
space:
mode:
Diffstat (limited to 'test/syscalls/linux/prctl.cc')
-rw-r--r--test/syscalls/linux/prctl.cc230
1 files changed, 0 insertions, 230 deletions
diff --git a/test/syscalls/linux/prctl.cc b/test/syscalls/linux/prctl.cc
deleted file mode 100644
index d07571a5f..000000000
--- a/test/syscalls/linux/prctl.cc
+++ /dev/null
@@ -1,230 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <sys/prctl.h>
-#include <sys/ptrace.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <string>
-
-#include "gtest/gtest.h"
-#include "absl/flags/flag.h"
-#include "test/util/capability_util.h"
-#include "test/util/cleanup.h"
-#include "test/util/multiprocess_util.h"
-#include "test/util/posix_error.h"
-#include "test/util/test_util.h"
-#include "test/util/thread_util.h"
-
-ABSL_FLAG(bool, prctl_no_new_privs_test_child, false,
- "If true, exit with the return value of prctl(PR_GET_NO_NEW_PRIVS) "
- "plus an offset (see test source).");
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-#ifndef SUID_DUMP_DISABLE
-#define SUID_DUMP_DISABLE 0
-#endif /* SUID_DUMP_DISABLE */
-#ifndef SUID_DUMP_USER
-#define SUID_DUMP_USER 1
-#endif /* SUID_DUMP_USER */
-#ifndef SUID_DUMP_ROOT
-#define SUID_DUMP_ROOT 2
-#endif /* SUID_DUMP_ROOT */
-
-TEST(PrctlTest, NameInitialized) {
- const size_t name_length = 20;
- char name[name_length] = {};
- ASSERT_THAT(prctl(PR_GET_NAME, name), SyscallSucceeds());
- ASSERT_NE(std::string(name), "");
-}
-
-TEST(PrctlTest, SetNameLongName) {
- const size_t name_length = 20;
- const std::string long_name(name_length, 'A');
- ASSERT_THAT(prctl(PR_SET_NAME, long_name.c_str()), SyscallSucceeds());
- char truncated_name[name_length] = {};
- ASSERT_THAT(prctl(PR_GET_NAME, truncated_name), SyscallSucceeds());
- const size_t truncated_length = 15;
- ASSERT_EQ(long_name.substr(0, truncated_length), std::string(truncated_name));
-}
-
-TEST(PrctlTest, ChildProcessName) {
- constexpr size_t kMaxNameLength = 15;
-
- char parent_name[kMaxNameLength + 1] = {};
- memset(parent_name, 'a', kMaxNameLength);
-
- ASSERT_THAT(prctl(PR_SET_NAME, parent_name), SyscallSucceeds());
-
- pid_t child_pid = fork();
- TEST_PCHECK(child_pid >= 0);
- if (child_pid == 0) {
- char child_name[kMaxNameLength + 1] = {};
- TEST_PCHECK(prctl(PR_GET_NAME, child_name) >= 0);
- TEST_CHECK(memcmp(parent_name, child_name, sizeof(parent_name)) == 0);
- _exit(0);
- }
-
- int status;
- ASSERT_THAT(waitpid(child_pid, &status, 0),
- SyscallSucceedsWithValue(child_pid));
- EXPECT_TRUE(WIFEXITED(status) && WEXITSTATUS(status) == 0)
- << "status =" << status;
-}
-
-// Offset added to exit code from test child to distinguish from other abnormal
-// exits.
-constexpr int kPrctlNoNewPrivsTestChildExitBase = 100;
-
-TEST(PrctlTest, NoNewPrivsPreservedAcrossCloneForkAndExecve) {
- // Check if no_new_privs is already set. If it is, we can still test that it's
- // preserved across clone/fork/execve, but we also expect it to still be set
- // at the end of the test. Otherwise, call prctl(PR_SET_NO_NEW_PRIVS) so as
- // not to contaminate the original thread.
- int no_new_privs;
- ASSERT_THAT(no_new_privs = prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0),
- SyscallSucceeds());
- ScopedThread([] {
- ASSERT_THAT(prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0), SyscallSucceeds());
- EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0),
- SyscallSucceedsWithValue(1));
- ScopedThread([] {
- EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0),
- SyscallSucceedsWithValue(1));
- // Note that these ASSERT_*s failing will only return from this thread,
- // but this is the intended behavior.
- pid_t child_pid = -1;
- int execve_errno = 0;
- auto cleanup = ASSERT_NO_ERRNO_AND_VALUE(
- ForkAndExec("/proc/self/exe",
- {"/proc/self/exe", "--prctl_no_new_privs_test_child"}, {},
- nullptr, &child_pid, &execve_errno));
-
- ASSERT_GT(child_pid, 0);
- ASSERT_EQ(execve_errno, 0);
-
- int status = 0;
- ASSERT_THAT(RetryEINTR(waitpid)(child_pid, &status, 0),
- SyscallSucceeds());
- ASSERT_TRUE(WIFEXITED(status));
- ASSERT_EQ(WEXITSTATUS(status), kPrctlNoNewPrivsTestChildExitBase + 1);
-
- EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0),
- SyscallSucceedsWithValue(1));
- });
- EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0),
- SyscallSucceedsWithValue(1));
- });
- EXPECT_THAT(prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0),
- SyscallSucceedsWithValue(no_new_privs));
-}
-
-TEST(PrctlTest, PDeathSig) {
- pid_t child_pid;
-
- // Make the new process' parent a separate thread since the parent death
- // signal fires when the parent *thread* exits.
- ScopedThread([&] {
- child_pid = fork();
- TEST_CHECK(child_pid >= 0);
- if (child_pid == 0) {
- // In child process.
- TEST_CHECK(prctl(PR_SET_PDEATHSIG, SIGKILL) >= 0);
- int signo;
- TEST_CHECK(prctl(PR_GET_PDEATHSIG, &signo) >= 0);
- TEST_CHECK(signo == SIGKILL);
- // Enable tracing, then raise SIGSTOP and expect our parent to suppress
- // it.
- TEST_CHECK(ptrace(PTRACE_TRACEME, 0, 0, 0) >= 0);
- raise(SIGSTOP);
- // Sleep until killed by our parent death signal. sleep(3) is
- // async-signal-safe, absl::SleepFor isn't.
- while (true) {
- sleep(10);
- }
- }
- // In parent process.
-
- // Wait for the child to send itself SIGSTOP and enter signal-delivery-stop.
- int status;
- ASSERT_THAT(waitpid(child_pid, &status, 0),
- SyscallSucceedsWithValue(child_pid));
- EXPECT_TRUE(WIFSTOPPED(status) && WSTOPSIG(status) == SIGSTOP)
- << "status = " << status;
-
- // Suppress the SIGSTOP and detach from the child.
- ASSERT_THAT(ptrace(PTRACE_DETACH, child_pid, 0, 0), SyscallSucceeds());
- });
-
- // The child should have been killed by its parent death SIGKILL.
- int status;
- ASSERT_THAT(waitpid(child_pid, &status, 0),
- SyscallSucceedsWithValue(child_pid));
- EXPECT_TRUE(WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL)
- << "status = " << status;
-}
-
-// This test is to validate that calling prctl with PR_SET_MM without the
-// CAP_SYS_RESOURCE returns EPERM.
-TEST(PrctlTest, InvalidPrSetMM) {
- if (ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_RESOURCE))) {
- ASSERT_NO_ERRNO(SetCapability(CAP_SYS_RESOURCE,
- false)); // Drop capability to test below.
- }
- ASSERT_THAT(prctl(PR_SET_MM, 0, 0, 0, 0), SyscallFailsWithErrno(EPERM));
-}
-
-// Sanity check that dumpability is remembered.
-TEST(PrctlTest, SetGetDumpability) {
- int before;
- ASSERT_THAT(before = prctl(PR_GET_DUMPABLE), SyscallSucceeds());
- auto cleanup = Cleanup([before] {
- ASSERT_THAT(prctl(PR_SET_DUMPABLE, before), SyscallSucceeds());
- });
-
- EXPECT_THAT(prctl(PR_SET_DUMPABLE, SUID_DUMP_DISABLE), SyscallSucceeds());
- EXPECT_THAT(prctl(PR_GET_DUMPABLE),
- SyscallSucceedsWithValue(SUID_DUMP_DISABLE));
-
- EXPECT_THAT(prctl(PR_SET_DUMPABLE, SUID_DUMP_USER), SyscallSucceeds());
- EXPECT_THAT(prctl(PR_GET_DUMPABLE), SyscallSucceedsWithValue(SUID_DUMP_USER));
-}
-
-// SUID_DUMP_ROOT cannot be set via PR_SET_DUMPABLE.
-TEST(PrctlTest, RootDumpability) {
- EXPECT_THAT(prctl(PR_SET_DUMPABLE, SUID_DUMP_ROOT),
- SyscallFailsWithErrno(EINVAL));
-}
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor
-
-int main(int argc, char** argv) {
- gvisor::testing::TestInit(&argc, &argv);
-
- if (absl::GetFlag(FLAGS_prctl_no_new_privs_test_child)) {
- exit(gvisor::testing::kPrctlNoNewPrivsTestChildExitBase +
- prctl(PR_GET_NO_NEW_PRIVS, 0, 0, 0, 0));
- }
-
- return RUN_ALL_TESTS();
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 19:37:02 +0000