Lines Matching +full:test +full:- +full:4 +full:space
1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <kunit/test.h>
11 /* Negative argc/envc counts produce -E2BIG */
13 .argc = INT_MIN, .envc = INT_MIN }, .expected_rc = -E2BIG },
15 .argc = 5, .envc = -1 }, .expected_rc = -E2BIG },
17 .argc = -1, .envc = 10 }, .expected_rc = -E2BIG },
20 .argc = INT_MAX, .envc = INT_MAX }, .expected_rc = -E2BIG },
22 .argc = MAX_ARG_STRINGS, .envc = MAX_ARG_STRINGS }, .expected_rc = -E2BIG },
24 .argc = 0, .envc = MAX_ARG_STRINGS }, .expected_rc = -E2BIG },
26 .argc = MAX_ARG_STRINGS, .envc = 0 }, .expected_rc = -E2BIG },
28 * On 32-bit system these argc and envc counts, while likely impossible
33 .argc = 0x20000001, .envc = 0x20000001 }, .expected_rc = -E2BIG },
35 /* Make sure a pathological bprm->p doesn't cause an overflow. */
37 .argc = 10, .envc = 10 }, .expected_rc = -E2BIG },
41 * we should see p - ARG_MAX + sizeof(void *).
44 .argc = 1, .envc = 0 }, .expected_argmin = ULONG_MAX - ARG_MAX + sizeof(void *)},
47 .argc = 0, .envc = 0 }, .expected_argmin = ULONG_MAX - ARG_MAX + sizeof(void *)},
50 * we should see -E2BIG. (Note argc is always raised to at least 1.)
53 .argc = ARG_MAX / sizeof(void *), .envc = 0 }, .expected_rc = -E2BIG },
55 .argc = 0, .envc = ARG_MAX / sizeof(void *) - 1 }, .expected_rc = -E2BIG },
57 .argc = ARG_MAX / sizeof(void *) + 1, .envc = 0 }, .expected_rc = -E2BIG },
59 .argc = 0, .envc = ARG_MAX / sizeof(void *) }, .expected_rc = -E2BIG },
60 /* And with one less, we see space for exactly 1 pointer. */
62 .argc = (ARG_MAX / sizeof(void *)) - 1, .envc = 0 },
63 .expected_argmin = ULONG_MAX - sizeof(void *) },
65 .argc = 0, .envc = (ARG_MAX / sizeof(void *)) - 2, },
66 .expected_argmin = ULONG_MAX - sizeof(void *) },
67 /* If we raise rlim_stack / 4 to exactly ARG_MAX, nothing changes. */
68 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = ARG_MAX * 4,
69 .argc = ARG_MAX / sizeof(void *), .envc = 0 }, .expected_rc = -E2BIG },
70 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = ARG_MAX * 4,
71 .argc = 0, .envc = ARG_MAX / sizeof(void *) - 1 }, .expected_rc = -E2BIG },
72 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = ARG_MAX * 4,
73 .argc = ARG_MAX / sizeof(void *) + 1, .envc = 0 }, .expected_rc = -E2BIG },
74 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = ARG_MAX * 4,
75 .argc = 0, .envc = ARG_MAX / sizeof(void *) }, .expected_rc = -E2BIG },
76 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = ARG_MAX * 4,
77 .argc = (ARG_MAX / sizeof(void *)) - 1, .envc = 0 },
78 .expected_argmin = ULONG_MAX - sizeof(void *) },
79 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = ARG_MAX * 4,
80 .argc = 0, .envc = (ARG_MAX / sizeof(void *)) - 2, },
81 .expected_argmin = ULONG_MAX - sizeof(void *) },
82 /* But raising it another pointer * 4 will provide space for 1 more pointer. */
83 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = (ARG_MAX + sizeof(void *)) * 4,
85 .expected_argmin = ULONG_MAX - sizeof(void *) },
86 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = (ARG_MAX + sizeof(void *)) * 4,
87 .argc = 0, .envc = ARG_MAX / sizeof(void *) - 1 },
88 .expected_argmin = ULONG_MAX - sizeof(void *) },
89 /* Raising rlim_stack / 4 to _STK_LIM / 4 * 3 will see more space. */
90 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = 4 * (_STK_LIM / 4 * 3),
92 .expected_argmin = ULONG_MAX - (_STK_LIM / 4 * 3) + sizeof(void *) },
94 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = 4 * (_STK_LIM / 4 * 3 + sizeof(void *)),
96 .expected_argmin = ULONG_MAX - (_STK_LIM / 4 * 3) + sizeof(void *) },
97 { { .p = ULONG_MAX, .rlim_stack.rlim_cur = 4 * _STK_LIM,
99 .expected_argmin = ULONG_MAX - (_STK_LIM / 4 * 3) + sizeof(void *) },
102 static void exec_test_bprm_stack_limits(struct kunit *test) in exec_test_bprm_stack_limits() argument
104 /* Double-check the constants. */ in exec_test_bprm_stack_limits()
105 KUNIT_EXPECT_EQ(test, _STK_LIM, SZ_8M); in exec_test_bprm_stack_limits()
106 KUNIT_EXPECT_EQ(test, ARG_MAX, 32 * SZ_4K); in exec_test_bprm_stack_limits()
107 KUNIT_EXPECT_EQ(test, MAX_ARG_STRINGS, 0x7FFFFFFF); in exec_test_bprm_stack_limits()
111 struct linux_binprm bprm = result->bprm; in exec_test_bprm_stack_limits()
115 KUNIT_EXPECT_EQ_MSG(test, rc, result->expected_rc, "on loop %d", i); in exec_test_bprm_stack_limits()
117 KUNIT_EXPECT_EQ_MSG(test, bprm.argmin, result->expected_argmin, "on loop %d", i); in exec_test_bprm_stack_limits()