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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2023 Red Hat GmbH
* Author: Alice Frosi <afrosi@redhat.com>
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <check.h>
#include "operations.h"
#include "common/common.h"
#include "common/gluten.h"
#include "testutil.h"
static void setup_error_check()
{
at = mmap(NULL, sizeof(struct args_target), PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
at->check_fd = false;
at->nr = __NR_getpid;
at->install_filter = install_notification_filter;
setup();
}
static void setup_stderr()
{
ck_stderr();
}
struct gluten_offset test_max_size_data[] = {
{ OFFSET_DATA, DATA_SIZE },
{ OFFSET_RO_DATA, RO_DATA_SIZE },
{ OFFSET_SECCOMP_DATA, 6 },
{ OFFSET_INSTRUCTION, INST_SIZE },
};
START_TEST(test_bound_check)
{
struct op ops[] = {
{ .type = OP_RETURN,
{ .ret = { { test_max_size_data[_i].type,
test_max_size_data[_i].offset } } } },
{ .type = OP_END, { { { 0 } } } },
};
write_instr(gluten, ops);
ck_assert_int_eq(eval(&gluten, &req, notifyfd), -1);
}
START_TEST(test_write_op_return)
{
struct gluten_offset offset = { OFFSET_RO_DATA, 0};
struct gluten_offset ret_off = { OFFSET_DATA, DATA_SIZE };
struct op ops[] = {
{ OP_CALL, { .call = { offset } } },
};
char err_msg[200];
struct syscall_desc_test {
uint32_t nr : 9;
uint32_t arg_count : 3;
uint32_t has_ret : 1;
uint32_t arg_deref : 6;
struct gluten_offset context; /* struct context_desc [] */
struct gluten_offset args[1];
} syscall = {
__NR_getppid, 0, 1, 0, { OFFSET_NULL, 0 }, { ret_off },
};
ck_stderr();
sprintf(err_msg, "failed writing return value at %d", DATA_SIZE);
ck_write_gluten(gluten, syscall, offset);
write_instr(gluten, ops);
ck_assert_int_eq(eval(&gluten, &req, notifyfd), -1);
ck_error_msg(err_msg);
}
START_TEST(test_write_op_load)
{
char a[30];
char err_msg[200];
struct op ops[] = {
{ OP_LOAD,
{ .load = { { OFFSET_SECCOMP_DATA, 1 },
{ OFFSET_DATA, DATA_SIZE - 1 },
sizeof(a) } } },
};
ck_stderr();
write_instr(gluten, ops);
ck_assert_int_eq(eval(&gluten, &req, notifyfd), -1);
ck_error_msg("offset limits are invalid");
}
struct gluten_offset test_max_size_read_data[] = {
{ OFFSET_DATA, DATA_SIZE },
{ OFFSET_RO_DATA, RO_DATA_SIZE },
{ OFFSET_SECCOMP_DATA, 6 },
};
START_TEST(test_read_op_return)
{
struct gluten_offset offset = { OFFSET_RO_DATA, 0 };
struct return_desc desc = { { test_max_size_read_data[_i].offset,
test_max_size_read_data[_i].type },
{ OFFSET_NULL, 0 },
false };
struct op ops[] = {
{ OP_RETURN, { .ret = { offset } } },
};
ck_stderr();
ck_write_gluten(gluten, desc, offset);
write_instr(gluten, ops);
ck_assert_int_eq(eval(&gluten, &req, notifyfd), -1);
ck_error_msg("offset limits are invalid");
}
static struct cmp_desc test_cmp_data[] = {
{ .cmp = CMP_EQ, .x = { OFFSET_DATA, DATA_SIZE } },
{ .cmp = CMP_EQ, .y = { OFFSET_DATA, DATA_SIZE } },
{ .cmp = CMP_EQ, .x = { OFFSET_DATA, DATA_SIZE - 1 }, .size = 10 },
{ .cmp = CMP_EQ, .y = { OFFSET_DATA, DATA_SIZE - 1 }, .size = 10 },
{ .cmp = CMP_EQ, .jmp = { OFFSET_DATA, DATA_SIZE } },
};
START_TEST(test_op_cmp)
{
struct gluten_offset offset = { OFFSET_RO_DATA, 0 };
struct cmp_desc cmp = {
test_cmp_data[_i].cmp,
test_cmp_data[_i].size,
{ test_cmp_data[_i].x.type, test_cmp_data[_i].x.offset },
{ test_cmp_data[_i].y.type, test_cmp_data[_i].y.offset },
test_cmp_data[_i].jmp
};
struct op ops[] = {
{ OP_CMP, { .cmp = { offset } } },
};
ck_stderr();
ck_write_gluten(gluten, cmp, offset);
write_instr(gluten, ops);
ck_assert_int_eq(eval(&gluten, &req, notifyfd), -1);
ck_error_msg("offset limits are invalid");
}
struct ttargetnoexisting_data {
struct op op;
char err_msg[BUFSIZ];
};
Suite *error_suite(void)
{
Suite *s;
TCase *bounds, *gwrite, *gread, *gcmp;
TCase *tnotexist;
s = suite_create("Error handling");
bounds = tcase_create("bound checks");
tcase_add_loop_test(bounds, test_bound_check, 0,
ARRAY_SIZE(test_max_size_data));
suite_add_tcase(s, bounds);
gwrite = tcase_create("write gluten");
tcase_add_checked_fixture(gwrite, setup_error_check, teardown);
tcase_add_test(gwrite, test_write_op_return);
tcase_add_test(gwrite, test_write_op_load);
suite_add_tcase(s, gwrite);
gread = tcase_create("read gluten");
tcase_add_checked_fixture(gread, setup_error_check, teardown);
tcase_add_loop_test(gread, test_read_op_return, 0,
ARRAY_SIZE(test_max_size_read_data));
suite_add_tcase(s, gread);
gcmp = tcase_create("compare gluten");
tcase_add_checked_fixture(gcmp, setup_error_check, teardown);
tcase_add_loop_test(gcmp, test_op_cmp, 0,
sizeof(test_cmp_data) / sizeof(test_cmp_data[0]));
suite_add_tcase(s, gcmp);
return s;
}
int main(void)
{
int no_failed = 0;
Suite *s;
SRunner *runner;
s = error_suite();
runner = srunner_create(s);
srunner_run_all(runner, CK_VERBOSE);
no_failed = srunner_ntests_failed(runner);
srunner_free(runner);
return (no_failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}
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