Commit 486e648c authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Daniel Borkmann
Browse files

selftests/bpf: Fix UBSan complaint about signed __int128 overflow 



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: default avatarAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-8-andrii@kernel.org
parent 59383537

tools/testing/selftests/bpf/prog_tests/btf_dump.c

+1 −1
Original line number Diff line number Diff line
@@ -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.