Commit cf1a4cbc authored by Yonghong Song's avatar Yonghong Song Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add a selftest for invalid func btf with btf decl_tag 

Added a selftest similar to [1] which exposed a kernel bug.
Without the fix in the previous patch, the similar kasan error will appear.

  [1] https://lore.kernel.org/bpf/0000000000009b6eaa05d71a8c06@google.com/



Signed-off-by: default avatarYonghong Song <yhs@fb.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Acked-by: default avatarMartin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220203191732.742285-1-yhs@fb.com
parent d7e7b42f

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

+19 −0
Original line number Diff line number Diff line
@@ -3938,6 +3938,25 @@ static struct btf_raw_test raw_tests[] = { 
	.btf_load_err = true,

	.err_str = "Invalid component_idx",

},

{

	.descr = "decl_tag test #15, func, invalid func proto",

	.raw_types = {

		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),	/* [1] */

		BTF_DECL_TAG_ENC(NAME_TBD, 3, 0),		/* [2] */

		BTF_FUNC_ENC(NAME_TBD, 8),			/* [3] */

		BTF_END_RAW,

	},

	BTF_STR_SEC("\0tag\0func"),

	.map_type = BPF_MAP_TYPE_ARRAY,

	.map_name = "tag_type_check_btf",

	.key_size = sizeof(int),

	.value_size = 4,

	.key_type_id = 1,

	.value_type_id = 1,

	.max_entries = 1,

	.btf_load_err = true,

	.err_str = "Invalid type_id",

},

{

	.descr = "type_tag test #1",

	.raw_types = {