summaryrefslogtreecommitdiffhomepage
path: root/test/syscalls
diff options
context:
space:
mode:
Diffstat (limited to 'test/syscalls')
-rw-r--r--test/syscalls/linux/exec.cc41
1 files changed, 41 insertions, 0 deletions
diff --git a/test/syscalls/linux/exec.cc b/test/syscalls/linux/exec.cc
index a9067df2a..581f03533 100644
--- a/test/syscalls/linux/exec.cc
+++ b/test/syscalls/linux/exec.cc
@@ -533,6 +533,47 @@ TEST(ExecTest, CloexecEventfd) {
W_EXITCODE(0, 0), "");
}
+constexpr int kLinuxMaxSymlinks = 40;
+
+TEST(ExecTest, SymlinkLimitExceeded) {
+ std::string path = WorkloadPath(kBasicWorkload);
+
+ // Hold onto TempPath objects so they are not destructed prematurely.
+ std::vector<TempPath> symlinks;
+ for (int i = 0; i < kLinuxMaxSymlinks + 1; i++) {
+ symlinks.push_back(
+ ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateSymlinkTo("/tmp", path)));
+ path = symlinks[i].path();
+ }
+
+ int execve_errno;
+ ASSERT_NO_ERRNO_AND_VALUE(
+ ForkAndExec(path, {path}, {}, /*child=*/nullptr, &execve_errno));
+ EXPECT_EQ(execve_errno, ELOOP);
+}
+
+TEST(ExecTest, SymlinkLimitRefreshedForInterpreter) {
+ std::string tmp_dir = "/tmp";
+ std::string interpreter_path = "/bin/echo";
+ TempPath script = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
+ tmp_dir, absl::StrCat("#!", interpreter_path), 0755));
+ std::string script_path = script.path();
+
+ // Hold onto TempPath objects so they are not destructed prematurely.
+ std::vector<TempPath> interpreter_symlinks;
+ std::vector<TempPath> script_symlinks;
+ for (int i = 0; i < kLinuxMaxSymlinks; i++) {
+ interpreter_symlinks.push_back(ASSERT_NO_ERRNO_AND_VALUE(
+ TempPath::CreateSymlinkTo(tmp_dir, interpreter_path)));
+ interpreter_path = interpreter_symlinks[i].path();
+ script_symlinks.push_back(ASSERT_NO_ERRNO_AND_VALUE(
+ TempPath::CreateSymlinkTo(tmp_dir, script_path)));
+ script_path = script_symlinks[i].path();
+ }
+
+ CheckExec(script_path, {script_path}, {}, ArgEnvExitStatus(0, 0), "");
+}
+
TEST(ExecveatTest, BasicWithFDCWD) {
std::string path = WorkloadPath(kBasicWorkload);
CheckExecveat(AT_FDCWD, path, {path}, {}, /*flags=*/0, ArgEnvExitStatus(0, 0),