Add a regression test

test/apps/clone3/clone_files.c

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: MPL-2.0
+
+#define _GNU_SOURCE
+
+#include "../network/test.h"
+
+#include <fcntl.h>
+#include <sched.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+static char child_stack[4096];
+#define CHILD_STACK_TOP \
+	(child_stack + sizeof(child_stack) / sizeof(child_stack[0]))
+
+static int fd1, fd2;
+
+static int child_close(void *arg)
+{
+	CHECK(close(fd2));
+
+	_exit(0);
+}
+
+FN_TEST(clone_files_and_close)
+{
+	pid_t pid;
+	int status;
+
+	fd1 = TEST_SUCC(open("/dev/null", O_RDONLY));
+	fd2 = TEST_SUCC(open("/dev/null", O_RDONLY));
+
+	pid = TEST_SUCC(clone(&child_close, CHILD_STACK_TOP,
+			      CLONE_FILES | SIGCHLD, NULL, NULL, NULL, NULL));
+
+	TEST_RES(wait(&status),
+		 _ret == pid && WIFEXITED(status) && WEXITSTATUS(status) == 0);
+
+	TEST_SUCC(close(fd1));
+	TEST_ERRNO(close(fd2), EBADF);
+}
+END_TEST()

test/apps/scripts/process.sh

@@ -11,6 +11,7 @@ echo "Start process test......"
 # These test programs are sorted by name.
 tests="
 clone3/clone_exit_signal
+clone3/clone_files
 clone3/clone_no_exit_signal
 clone3/clone_process
 cpu_affinity/cpu_affinity