Test is using __int128 variable as unsigned and highest order bit can be set to 1 after bit shift. Use unsigned __int128 explicitly and prevent UBSan from complaining. Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx> --- tools/testing/selftests/bpf/prog_tests/btf_dump.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/prog_tests/btf_dump.c b/tools/testing/selftests/bpf/prog_tests/btf_dump.c index af47aeb211e7..9e26903f9170 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf_dump.c +++ b/tools/testing/selftests/bpf/prog_tests/btf_dump.c @@ -323,7 +323,7 @@ static void test_btf_dump_int_data(struct btf *btf, struct btf_dump *d, char *str) { #ifdef __SIZEOF_INT128__ - __int128 i = 0xffffffffffffffff; + unsigned __int128 i = 0xffffffffffffffff; /* this dance is required because we cannot directly initialize * a 128-bit value to anything larger than a 64-bit value. -- 2.30.2