github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-21 13:27:57 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

selftests: vDSO: improve getrandom and chacha error messages

Browse Source 
Improve the error and skip condition messages to let the developer know
precisely where a test has failed. Also make better use of the ksft api
for this.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Jason A. Donenfeld 2024-10-07 23:45:58 +02:00 committed by Shuah Khan
parent fe6305cbc7
commit 3953a1d137
2 changed files with 49 additions and 53 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
tools/testing/selftests/vDSO/vdso_test_chacha.c
View File

@ -91,10 +91,8 @@ int main(int argc, char *argv[])
ksft_set_plan(1);
for (unsigned int trial = 0; trial < TRIALS; ++trial) {
if (getrandom(key, sizeof(key), 0) != sizeof(key)) {
printf("getrandom() failed!\n");
return KSFT_SKIP;
}
if (getrandom(key, sizeof(key), 0) != sizeof(key))
ksft_exit_skip("getrandom() failed unexpectedly\n");
memset(counter1, 0, sizeof(counter1));
reference_chacha20_blocks(output1, key, counter1, BLOCKS);
for (unsigned int split = 0; split < BLOCKS; ++split) {
@ -103,8 +101,10 @@ int main(int argc, char *argv[])
if (split)
__arch_chacha20_blocks_nostack(output2, key, counter2, split);
__arch_chacha20_blocks_nostack(output2 + split * BLOCK_SIZE, key, counter2, BLOCKS - split);
if (memcmp(output1, output2, sizeof(output1)) || memcmp(counter1, counter2, sizeof(counter1)))
return KSFT_FAIL;
if (memcmp(output1, output2, sizeof(output1)))
ksft_exit_fail_msg("Main loop outputs do not match on trial %u, split %u\n", trial, split);
if (memcmp(counter1, counter2, sizeof(counter1)))
ksft_exit_fail_msg("Main loop counters do not match on trial %u, split %u\n", trial, split);
}
}
memset(counter1, 0, sizeof(counter1));
@ -114,14 +114,19 @@ int main(int argc, char *argv[])
reference_chacha20_blocks(output1, key, counter1, BLOCKS);
__arch_chacha20_blocks_nostack(output2, key, counter2, BLOCKS);
if (memcmp(output1, output2, sizeof(output1)) || memcmp(counter1, counter2, sizeof(counter1)))
return KSFT_FAIL;
if (memcmp(output1, output2, sizeof(output1)))
ksft_exit_fail_msg("Block limit outputs do not match after first round\n");
if (memcmp(counter1, counter2, sizeof(counter1)))
ksft_exit_fail_msg("Block limit counters do not match after first round\n");
reference_chacha20_blocks(output1, key, counter1, BLOCKS);
__arch_chacha20_blocks_nostack(output2, key, counter2, BLOCKS);
if (memcmp(output1, output2, sizeof(output1)) || memcmp(counter1, counter2, sizeof(counter1)))
return KSFT_FAIL;
if (memcmp(output1, output2, sizeof(output1)))
ksft_exit_fail_msg("Block limit outputs do not match after second round\n");
if (memcmp(counter1, counter2, sizeof(counter1)))
ksft_exit_fail_msg("Block limit counters do not match after second round\n");
ksft_test_result_pass("chacha: PASS\n");
return KSFT_PASS;
ksft_exit_pass();
return 0;
}

75
tools/testing/selftests/vDSO/vdso_test_getrandom.c
View File

@ -40,6 +40,9 @@
} while (0)
#endif
#define ksft_assert(condition) \
do { if (!(condition)) ksft_exit_fail_msg("Assertion failed: %s\n", #condition); } while (0)
static struct {
pthread_mutex_t lock;
void **states;
@ -111,26 +114,19 @@ static void vgetrandom_init(void)
const char *version = versions[VDSO_VERSION];
const char *name = names[VDSO_NAMES][6];
unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
size_t ret;
ssize_t ret;
if (!sysinfo_ehdr) {
printf("AT_SYSINFO_EHDR is not present!\n");
exit(KSFT_SKIP);
}
if (!sysinfo_ehdr)
ksft_exit_skip("AT_SYSINFO_EHDR is not present\n");
vdso_init_from_sysinfo_ehdr(sysinfo_ehdr);
vgrnd.fn = (__typeof__(vgrnd.fn))vdso_sym(version, name);
if (!vgrnd.fn) {
printf("%s is missing!\n", name);
exit(KSFT_SKIP);
}
if (!vgrnd.fn)
ksft_exit_skip("%s@%s symbol is missing from vDSO\n", name, version);
ret = VDSO_CALL(vgrnd.fn, 5, NULL, 0, 0, &vgrnd.params, ~0UL);
if (ret == -ENOSYS) {
printf("unsupported architecture\n");
exit(KSFT_SKIP);
} else if (ret) {
printf("failed to fetch vgetrandom params!\n");
exit(KSFT_FAIL);
}
if (ret == -ENOSYS)
ksft_exit_skip("CPU does not have runtime support\n");
else if (ret)
ksft_exit_fail_msg("Failed to fetch vgetrandom params: %zd\n", ret);
}
static ssize_t vgetrandom(void *buf, size_t len, unsigned long flags)
@ -139,10 +135,7 @@ static ssize_t vgetrandom(void *buf, size_t len, unsigned long flags)
if (!state) {
state = vgetrandom_get_state();
if (!state) {
printf("vgetrandom_get_state failed!\n");
exit(KSFT_FAIL);
}
ksft_assert(state);
}
return VDSO_CALL(vgrnd.fn, 5, buf, len, flags, state, vgrnd.params.size_of_opaque_state);
}
@ -154,7 +147,7 @@ static void *test_vdso_getrandom(void *ctx)
for (size_t i = 0; i < TRIALS; ++i) {
unsigned int val;
ssize_t ret = vgetrandom(&val, sizeof(val), 0);
assert(ret == sizeof(val));
ksft_assert(ret == sizeof(val));
}
return NULL;
}
@ -164,7 +157,7 @@ static void *test_libc_getrandom(void *ctx)
for (size_t i = 0; i < TRIALS; ++i) {
unsigned int val;
ssize_t ret = getrandom(&val, sizeof(val), 0);
assert(ret == sizeof(val));
ksft_assert(ret == sizeof(val));
}
return NULL;
}
@ -174,7 +167,7 @@ static void *test_syscall_getrandom(void *ctx)
for (size_t i = 0; i < TRIALS; ++i) {
unsigned int val;
ssize_t ret = syscall(__NR_getrandom, &val, sizeof(val), 0);
assert(ret == sizeof(val));
ksft_assert(ret == sizeof(val));
}
return NULL;
}
@ -209,7 +202,7 @@ static void bench_multi(void)
clock_gettime(CLOCK_MONOTONIC, &start);
for (size_t i = 0; i < THREADS; ++i)
assert(pthread_create(&threads[i], NULL, test_vdso_getrandom, NULL) == 0);
ksft_assert(pthread_create(&threads[i], NULL, test_vdso_getrandom, NULL) == 0);
for (size_t i = 0; i < THREADS; ++i)
pthread_join(threads[i], NULL);
clock_gettime(CLOCK_MONOTONIC, &end);
@ -218,7 +211,7 @@ static void bench_multi(void)
clock_gettime(CLOCK_MONOTONIC, &start);
for (size_t i = 0; i < THREADS; ++i)
assert(pthread_create(&threads[i], NULL, test_libc_getrandom, NULL) == 0);
ksft_assert(pthread_create(&threads[i], NULL, test_libc_getrandom, NULL) == 0);
for (size_t i = 0; i < THREADS; ++i)
pthread_join(threads[i], NULL);
clock_gettime(CLOCK_MONOTONIC, &end);
@ -227,7 +220,7 @@ static void bench_multi(void)
clock_gettime(CLOCK_MONOTONIC, &start);
for (size_t i = 0; i < THREADS; ++i)
assert(pthread_create(&threads[i], NULL, test_syscall_getrandom, NULL) == 0);
ksft_assert(pthread_create(&threads[i], NULL, test_syscall_getrandom, NULL) == 0);
for (size_t i = 0; i < THREADS; ++i)
pthread_join(threads[i], NULL);
clock_gettime(CLOCK_MONOTONIC, &end);
@ -252,48 +245,46 @@ static void kselftest(void)
for (size_t i = 0; i < 1000; ++i) {
ssize_t ret = vgetrandom(weird_size, sizeof(weird_size), 0);
if (ret != sizeof(weird_size))
exit(KSFT_FAIL);
ksft_assert(ret == sizeof(weird_size));
}
ksft_test_result_pass("getrandom: PASS\n");
unshare(CLONE_NEWUSER);
assert(unshare(CLONE_NEWTIME) == 0);
ksft_assert(unshare(CLONE_NEWTIME) == 0);
child = fork();
assert(child >= 0);
ksft_assert(child >= 0);
if (!child) {
vgetrandom_init();
child = getpid();
assert(ptrace(PTRACE_TRACEME, 0, NULL, NULL) == 0);
assert(kill(child, SIGSTOP) == 0);
assert(vgetrandom(weird_size, sizeof(weird_size), 0) == sizeof(weird_size));
ksft_assert(ptrace(PTRACE_TRACEME, 0, NULL, NULL) == 0);
ksft_assert(kill(child, SIGSTOP) == 0);
ksft_assert(vgetrandom(weird_size, sizeof(weird_size), 0) == sizeof(weird_size));
_exit(0);
}
for (;;) {
struct ptrace_syscall_info info = { 0 };
int status, ret;
assert(waitpid(child, &status, 0) >= 0);
ksft_assert(waitpid(child, &status, 0) >= 0);
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0)
exit(KSFT_FAIL);
ksft_assert(WEXITSTATUS(status) == 0);
break;
}
assert(WIFSTOPPED(status));
ksft_assert(WIFSTOPPED(status));
if (WSTOPSIG(status) == SIGSTOP)
assert(ptrace(PTRACE_SETOPTIONS, child, 0, PTRACE_O_TRACESYSGOOD) == 0);
ksft_assert(ptrace(PTRACE_SETOPTIONS, child, 0, PTRACE_O_TRACESYSGOOD) == 0);
else if (WSTOPSIG(status) == (SIGTRAP | 0x80)) {
assert(ptrace(PTRACE_GET_SYSCALL_INFO, child, sizeof(info), &info) > 0);
ksft_assert(ptrace(PTRACE_GET_SYSCALL_INFO, child, sizeof(info), &info) > 0);
if (info.op == PTRACE_SYSCALL_INFO_ENTRY && info.entry.nr == __NR_getrandom &&
info.entry.args[0] == (uintptr_t)weird_size && info.entry.args[1] == sizeof(weird_size))
exit(KSFT_FAIL);
ksft_exit_fail_msg("vgetrandom passed buffer to syscall getrandom unexpectedly\n");
}
assert(ptrace(PTRACE_SYSCALL, child, 0, 0) == 0);
ksft_assert(ptrace(PTRACE_SYSCALL, child, 0, 0) == 0);
}
ksft_test_result_pass("getrandom timens: PASS\n");
exit(KSFT_PASS);
ksft_exit_pass();
}
static void usage(const char *argv0)