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Fix race condition with test comparison functions

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Make sure we hold the mutex whilst making several changes at the same
time, to prevent race condition on writing connected bits of data.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
This commit is contained in:
Paul Elliott 2024-01-30 18:00:26 +00:00
parent 3d2db89d5c
commit fad978b232
1 changed files with 107 additions and 78 deletions
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185
tests/src/helpers.c
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@ -53,18 +53,13 @@ mbedtls_test_result_t mbedtls_test_get_result(void)
void mbedtls_test_set_result(mbedtls_test_result_t result, const char *test,
int line_no, const char *filename)
{
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Internal function only - mbedtls_test_info_mutex should be held prior
* to calling this function. */
mbedtls_test_info.result = result;
mbedtls_test_info.test = test;
mbedtls_test_info.line_no = line_no;
mbedtls_test_info.filename = filename;
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
const char *mbedtls_test_get_test(void)
@ -151,15 +146,10 @@ unsigned long mbedtls_test_get_step(void)
void mbedtls_test_set_step(unsigned long step)
{
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Internal function only - mbedtls_test_info_mutex should be held prior
* to calling this function. */
mbedtls_test_info.step = step;
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
void mbedtls_test_get_line1(char *line)
@ -177,19 +167,14 @@ void mbedtls_test_get_line1(char *line)
void mbedtls_test_set_line1(const char *line)
{
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Internal function only - mbedtls_test_info_mutex should be held prior
* to calling this function. */
if (line == NULL) {
memset(mbedtls_test_info.line1, 0, MBEDTLS_TEST_LINE_LENGTH);
} else {
memcpy(mbedtls_test_info.line1, line, MBEDTLS_TEST_LINE_LENGTH);
}
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
void mbedtls_test_get_line2(char *line)
@ -207,19 +192,14 @@ void mbedtls_test_get_line2(char *line)
void mbedtls_test_set_line2(const char *line)
{
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Internal function only - mbedtls_test_info_mutex should be held prior
* to calling this function. */
if (line == NULL) {
memset(mbedtls_test_info.line2, 0, MBEDTLS_TEST_LINE_LENGTH);
} else {
memcpy(mbedtls_test_info.line2, line, MBEDTLS_TEST_LINE_LENGTH);
}
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
@ -264,15 +244,10 @@ unsigned mbedtls_test_get_case_uses_negative_0(void)
void mbedtls_test_set_case_uses_negative_0(unsigned uses)
{
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Internal function only - mbedtls_test_info_mutex should be held prior
* to calling this function. */
mbedtls_test_info.case_uses_negative_0 = uses;
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
void mbedtls_test_increment_case_uses_negative_0(void)
@ -355,21 +330,41 @@ int mbedtls_test_ascii2uc(const char c, unsigned char *uc)
void mbedtls_test_fail(const char *test, int line_no, const char *filename)
{
if (mbedtls_test_get_result() == MBEDTLS_TEST_RESULT_FAILED) {
/* We've already recorded the test as having failed. Don't
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Don't use accessor, we already hold mutex. */
if (mbedtls_test_info.result != MBEDTLS_TEST_RESULT_FAILED) {
/* If we have already recorded the test as having failed then don't
* overwrite any previous information about the failure. */
return;
mbedtls_test_set_result(MBEDTLS_TEST_RESULT_FAILED, test, line_no, filename);
}
mbedtls_test_set_result(MBEDTLS_TEST_RESULT_FAILED, test, line_no, filename);
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
void mbedtls_test_skip(const char *test, int line_no, const char *filename)
{
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
mbedtls_test_set_result(MBEDTLS_TEST_RESULT_SKIPPED, test, line_no, filename);
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
void mbedtls_test_info_reset(void)
{
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
mbedtls_test_set_result(MBEDTLS_TEST_RESULT_SUCCESS, 0, 0, 0);
mbedtls_test_set_step((unsigned long) (-1));
mbedtls_test_set_line1(NULL);
@ -378,6 +373,10 @@ void mbedtls_test_info_reset(void)
#if defined(MBEDTLS_BIGNUM_C)
mbedtls_test_set_case_uses_negative_0(0);
#endif
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
}
int mbedtls_test_equal(const char *test, int line_no, const char *filename,
@ -390,21 +389,31 @@ int mbedtls_test_equal(const char *test, int line_no, const char *filename,
return 1;
}
if (mbedtls_test_get_result() == MBEDTLS_TEST_RESULT_FAILED) {
/* We've already recorded the test as having failed. Don't
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Don't use accessor, as we already hold mutex. */
if (mbedtls_test_info.result != MBEDTLS_TEST_RESULT_FAILED) {
/* If we've already recorded the test as having failed then don't
* overwrite any previous information about the failure. */
return 0;
char buf[MBEDTLS_TEST_LINE_LENGTH];
mbedtls_test_fail(test, line_no, filename);
(void) mbedtls_snprintf(buf, sizeof(buf),
"lhs = 0x%016llx = %lld",
value1, (long long) value1);
mbedtls_test_set_line1(buf);
(void) mbedtls_snprintf(buf, sizeof(buf),
"rhs = 0x%016llx = %lld",
value2, (long long) value2);
mbedtls_test_set_line2(buf);
}
char buf[MBEDTLS_TEST_LINE_LENGTH];
mbedtls_test_fail(test, line_no, filename);
(void) mbedtls_snprintf(buf, sizeof(buf),
"lhs = 0x%016llx = %lld",
value1, (long long) value1);
mbedtls_test_set_line1(buf);
(void) mbedtls_snprintf(buf, sizeof(buf),
"rhs = 0x%016llx = %lld",
value2, (long long) value2);
mbedtls_test_set_line2(buf);
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
return 0;
}
@ -418,21 +427,31 @@ int mbedtls_test_le_u(const char *test, int line_no, const char *filename,
return 1;
}
if (mbedtls_test_get_result() == MBEDTLS_TEST_RESULT_FAILED) {
/* We've already recorded the test as having failed. Don't
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Don't use accessor, we already hold mutex. */
if (mbedtls_test_info.result != MBEDTLS_TEST_RESULT_FAILED) {
/* If we've already recorded the test as having failed then don't
* overwrite any previous information about the failure. */
return 0;
char buf[MBEDTLS_TEST_LINE_LENGTH];
mbedtls_test_fail(test, line_no, filename);
(void) mbedtls_snprintf(buf, sizeof(buf),
"lhs = 0x%016llx = %llu",
value1, value1);
mbedtls_test_set_line1(buf);
(void) mbedtls_snprintf(buf, sizeof(buf),
"rhs = 0x%016llx = %llu",
value2, value2);
mbedtls_test_set_line2(buf);
}
char buf[MBEDTLS_TEST_LINE_LENGTH];
mbedtls_test_fail(test, line_no, filename);
(void) mbedtls_snprintf(buf, sizeof(buf),
"lhs = 0x%016llx = %llu",
value1, value1);
mbedtls_test_set_line1(buf);
(void) mbedtls_snprintf(buf, sizeof(buf),
"rhs = 0x%016llx = %llu",
value2, value2);
mbedtls_test_set_line2(buf);
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
return 0;
}
@ -446,21 +465,31 @@ int mbedtls_test_le_s(const char *test, int line_no, const char *filename,
return 1;
}
if (mbedtls_test_get_result() == MBEDTLS_TEST_RESULT_FAILED) {
/* We've already recorded the test as having failed. Don't
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_lock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
/* Don't use accessor, we already hold mutex. */
if (mbedtls_test_get_result() != MBEDTLS_TEST_RESULT_FAILED) {
/* If we've already recorded the test as having failed then don't
* overwrite any previous information about the failure. */
return 0;
char buf[MBEDTLS_TEST_LINE_LENGTH];
mbedtls_test_fail(test, line_no, filename);
(void) mbedtls_snprintf(buf, sizeof(buf),
"lhs = 0x%016llx = %lld",
(unsigned long long) value1, value1);
mbedtls_test_set_line1(buf);
(void) mbedtls_snprintf(buf, sizeof(buf),
"rhs = 0x%016llx = %lld",
(unsigned long long) value2, value2);
mbedtls_test_set_line2(buf);
}
char buf[MBEDTLS_TEST_LINE_LENGTH];
mbedtls_test_fail(test, line_no, filename);
(void) mbedtls_snprintf(buf, sizeof(buf),
"lhs = 0x%016llx = %lld",
(unsigned long long) value1, value1);
mbedtls_test_set_line1(buf);
(void) mbedtls_snprintf(buf, sizeof(buf),
"rhs = 0x%016llx = %lld",
(unsigned long long) value2, value2);
mbedtls_test_set_line2(buf);
#ifdef MBEDTLS_THREADING_C
mbedtls_mutex_unlock(&mbedtls_test_info_mutex);
#endif /* MBEDTLS_THREADING_C */
return 0;
}