The uffd tests generate two compile time warnings from clang's -Wformat-security setting. These trigger at the call sites for uffd_test_start() and uffd_test_skip().
1) Fix the uffd_test_start() issue by removing the intermediate test_name variable (thanks to David Hildenbrand for showing how to do this).
2) Fix the uffd_test_skip() issue by observing that there is no need for a macro and a variable args approach, because all callers of uffd_test_skip() pass in a simple char* string, without any format specifiers. So just change uffd_test_skip() into a regular C function.
Cc: David Hildenbrand david@redhat.com Cc: Peter Xu peterx@redhat.com Signed-off-by: John Hubbard jhubbard@nvidia.com --- tools/testing/selftests/mm/uffd-unit-tests.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c index 269c86768a02..04d91f144d1c 100644 --- a/tools/testing/selftests/mm/uffd-unit-tests.c +++ b/tools/testing/selftests/mm/uffd-unit-tests.c @@ -109,12 +109,11 @@ static void uffd_test_pass(void) ksft_inc_fail_cnt(); \ } while (0)
-#define uffd_test_skip(...) do { \ - printf("skipped [reason: "); \ - printf(__VA_ARGS__); \ - printf("]\n"); \ - ksft_inc_xskip_cnt(); \ - } while (0) +static void uffd_test_skip(const char *message) +{ + printf("skipped [reason: %s]\n", message); + ksft_inc_xskip_cnt(); +}
/* * Returns 1 if specific userfaultfd supported, 0 otherwise. Note, we'll @@ -1149,7 +1148,6 @@ int main(int argc, char *argv[]) uffd_test_case_t *test; mem_type_t *mem_type; uffd_test_args_t args; - char test_name[128]; const char *errmsg; int has_uffd, opt; int i, j; @@ -1192,10 +1190,8 @@ int main(int argc, char *argv[]) mem_type = &mem_types[j]; if (!(test->mem_targets & mem_type->mem_flag)) continue; - snprintf(test_name, sizeof(test_name), - "%s on %s", test->name, mem_type->name);
- uffd_test_start(test_name); + uffd_test_start("%s on %s", test->name, mem_type->name); if (!uffd_feature_supported(test)) { uffd_test_skip("feature missing"); continue;