diff options
Diffstat (limited to 'lib/test-string_helpers.c')
| -rw-r--r-- | lib/test-string_helpers.c | 240 |
1 files changed, 236 insertions, 4 deletions
diff --git a/lib/test-string_helpers.c b/lib/test-string_helpers.c index ac44c92..ab0d30e 100644 --- a/lib/test-string_helpers.c +++ b/lib/test-string_helpers.c @@ -5,6 +5,7 @@ #include <linux/init.h> #include <linux/kernel.h> +#include <linux/slab.h> #include <linux/module.h> #include <linux/random.h> #include <linux/string.h> @@ -62,10 +63,14 @@ static const struct test_string strings[] __initconst = { static void __init test_string_unescape(const char *name, unsigned int flags, bool inplace) { - char in[256]; - char out_test[256]; - char out_real[256]; - int i, p = 0, q_test = 0, q_real = sizeof(out_real); + int q_real = 256; + char *in = kmalloc(q_real, GFP_KERNEL); + char *out_test = kmalloc(q_real, GFP_KERNEL); + char *out_real = kmalloc(q_real, GFP_KERNEL); + int i, p = 0, q_test = 0; + + if (!in || !out_test || !out_real) + goto out; for (i = 0; i < ARRAY_SIZE(strings); i++) { const char *s = strings[i].in; @@ -100,6 +105,223 @@ static void __init test_string_unescape(const char *name, unsigned int flags, test_string_check_buf(name, flags, in, p - 1, out_real, q_real, out_test, q_test); +out: + kfree(out_real); + kfree(out_test); + kfree(in); +} + +struct test_string_1 { + const char *out; + unsigned int flags; +}; + +#define TEST_STRING_2_MAX_S1 32 +struct test_string_2 { + const char *in; + struct test_string_1 s1[TEST_STRING_2_MAX_S1]; +}; + +#define TEST_STRING_2_DICT_0 NULL +static const struct test_string_2 escape0[] __initconst = {{ + .in = "\f\\ \n\r\t\v", + .s1 = {{ + .out = "\\f\\ \\n\\r\\t\\v", + .flags = ESCAPE_SPACE, + },{ + .out = "\\f\\134\\040\\n\\r\\t\\v", + .flags = ESCAPE_SPACE | ESCAPE_OCTAL, + },{ + .out = "\\f\\x5c\\x20\\n\\r\\t\\v", + .flags = ESCAPE_SPACE | ESCAPE_HEX, + },{ + /* terminator */ + }}, +},{ + .in = "\\h\\\"\a\e\\", + .s1 = {{ + .out = "\\\\h\\\\\"\\a\\e\\\\", + .flags = ESCAPE_SPECIAL, + },{ + .out = "\\\\\\150\\\\\\042\\a\\e\\\\", + .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL, + },{ + .out = "\\\\\\x68\\\\\\x22\\a\\e\\\\", + .flags = ESCAPE_SPECIAL | ESCAPE_HEX, + },{ + /* terminator */ + }}, +},{ + .in = "\eb \\C\007\"\x90\r]", + .s1 = {{ + .out = "\eb \\C\007\"\x90\\r]", + .flags = ESCAPE_SPACE, + },{ + .out = "\\eb \\\\C\\a\"\x90\r]", + .flags = ESCAPE_SPECIAL, + },{ + .out = "\\eb \\\\C\\a\"\x90\\r]", + .flags = ESCAPE_SPACE | ESCAPE_SPECIAL, + },{ + .out = "\\033\\142\\040\\134\\103\\007\\042\\220\\015\\135", + .flags = ESCAPE_OCTAL, + },{ + .out = "\\033\\142\\040\\134\\103\\007\\042\\220\\r\\135", + .flags = ESCAPE_SPACE | ESCAPE_OCTAL, + },{ + .out = "\\e\\142\\040\\\\\\103\\a\\042\\220\\015\\135", + .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL, + },{ + .out = "\\e\\142\\040\\\\\\103\\a\\042\\220\\r\\135", + .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_OCTAL, + },{ + .out = "\eb \\C\007\"\x90\r]", + .flags = ESCAPE_NP, + },{ + .out = "\eb \\C\007\"\x90\\r]", + .flags = ESCAPE_SPACE | ESCAPE_NP, + },{ + .out = "\\eb \\C\\a\"\x90\r]", + .flags = ESCAPE_SPECIAL | ESCAPE_NP, + },{ + .out = "\\eb \\C\\a\"\x90\\r]", + .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NP, + },{ + .out = "\\033b \\C\\007\"\\220\\015]", + .flags = ESCAPE_OCTAL | ESCAPE_NP, + },{ + .out = "\\033b \\C\\007\"\\220\\r]", + .flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NP, + },{ + .out = "\\eb \\C\\a\"\\220\\r]", + .flags = ESCAPE_SPECIAL | ESCAPE_SPACE | ESCAPE_OCTAL | + ESCAPE_NP, + },{ + .out = "\\x1bb \\C\\x07\"\\x90\\x0d]", + .flags = ESCAPE_NP | ESCAPE_HEX, + },{ + /* terminator */ + }}, +},{ + /* terminator */ +}}; + +#define TEST_STRING_2_DICT_1 "b\\ \t\r" +static const struct test_string_2 escape1[] __initconst = {{ + .in = "\f\\ \n\r\t\v", + .s1 = {{ + .out = "\f\\134\\040\n\\015\\011\v", + .flags = ESCAPE_OCTAL, + },{ + .out = "\f\\x5c\\x20\n\\x0d\\x09\v", + .flags = ESCAPE_HEX, + },{ + /* terminator */ + }}, +},{ + .in = "\\h\\\"\a\e\\", + .s1 = {{ + .out = "\\134h\\134\"\a\e\\134", + .flags = ESCAPE_OCTAL, + },{ + /* terminator */ + }}, +},{ + .in = "\eb \\C\007\"\x90\r]", + .s1 = {{ + .out = "\e\\142\\040\\134C\007\"\x90\\015]", + .flags = ESCAPE_OCTAL, + },{ + /* terminator */ + }}, +},{ + /* terminator */ +}}; + +static __init const char *test_string_find_match(const struct test_string_2 *s2, + unsigned int flags) +{ + const struct test_string_1 *s1 = s2->s1; + unsigned int i; + + if (!flags) + return s2->in; + + /* Test cases are NULL-aware */ + flags &= ~ESCAPE_NULL; + + /* ESCAPE_OCTAL has a higher priority */ + if (flags & ESCAPE_OCTAL) + flags &= ~ESCAPE_HEX; + + for (i = 0; i < TEST_STRING_2_MAX_S1 && s1->out; i++, s1++) + if (s1->flags == flags) + return s1->out; + return NULL; +} + +static __init void test_string_escape(const char *name, + const struct test_string_2 *s2, + unsigned int flags, const char *esc) +{ + int q_real = 512; + char *out_test = kmalloc(q_real, GFP_KERNEL); + char *out_real = kmalloc(q_real, GFP_KERNEL); + char *in = kmalloc(256, GFP_KERNEL); + char *buf = out_real; + int p = 0, q_test = 0; + + if (!out_test || !out_real || !in) + goto out; + + for (; s2->in; s2++) { + const char *out; + int len; + + /* NULL injection */ + if (flags & ESCAPE_NULL) { + in[p++] = '\0'; + out_test[q_test++] = '\\'; + out_test[q_test++] = '0'; + } + + /* Don't try strings that have no output */ + out = test_string_find_match(s2, flags); + if (!out) + continue; + + /* Copy string to in buffer */ + len = strlen(s2->in); + memcpy(&in[p], s2->in, len); + p += len; + + /* Copy expected result for given flags */ + len = strlen(out); + memcpy(&out_test[q_test], out, len); + q_test += len; + } + + q_real = string_escape_mem(in, p, &buf, q_real, flags, esc); + + test_string_check_buf(name, flags, in, p, out_real, q_real, out_test, + q_test); +out: + kfree(in); + kfree(out_real); + kfree(out_test); +} + +static __init void test_string_escape_nomem(void) +{ + char *in = "\eb \\C\007\"\x90\r]"; + char out[64], *buf = out; + int rc = -ENOMEM, ret; + + ret = string_escape_str_any_np(in, &buf, strlen(in), NULL); + if (ret == rc) + return; + + pr_err("Test 'escape nomem' failed: got %d instead of %d\n", ret, rc); } static int __init test_string_helpers_init(void) @@ -112,6 +334,16 @@ static int __init test_string_helpers_init(void) test_string_unescape("unescape inplace", get_random_int() % (UNESCAPE_ANY + 1), true); + /* Without dictionary */ + for (i = 0; i < (ESCAPE_ANY_NP | ESCAPE_HEX) + 1; i++) + test_string_escape("escape 0", escape0, i, TEST_STRING_2_DICT_0); + + /* With dictionary */ + for (i = 0; i < (ESCAPE_ANY_NP | ESCAPE_HEX) + 1; i++) + test_string_escape("escape 1", escape1, i, TEST_STRING_2_DICT_1); + + test_string_escape_nomem(); + return -EINVAL; } module_init(test_string_helpers_init); |
