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selftests/bpf: Fix UBSan complaint about signed __int128 overflow

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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@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-8-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2021-11-23 16:23:19 -08:00 committed by Daniel Borkmann
parent 593835377f
commit 486e648cb2
1 changed files with 1 additions and 1 deletions
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tools/testing/selftests/bpf/prog_tests/btf_dump.c
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@ -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.