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Commit fd10c2ef authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by David S. Miller
Browse files

bpf: add tests to verifier testsuite 



add 4 extra tests to cover jump verification better

Signed-off-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f1bca824

samples/bpf/test_verifier.c

+130 −0
Original line number Diff line number Diff line
@@ -461,6 +461,136 @@ static struct bpf_test tests[] = { 
		.errstr = "R0 invalid mem access",

		.result = REJECT,

	},

	{

		"jump test 1",

		.insns = {

			BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),

			BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_1, -8),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 1),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 1),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 1),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 1),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 1),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 5),

			BPF_MOV64_IMM(BPF_REG_0, 0),

			BPF_EXIT_INSN(),

		},

		.result = ACCEPT,

	},

	{

		"jump test 2",

		.insns = {

			BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 2),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),

			BPF_JMP_IMM(BPF_JA, 0, 0, 14),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 2),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 0),

			BPF_JMP_IMM(BPF_JA, 0, 0, 11),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 2),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 0),

			BPF_JMP_IMM(BPF_JA, 0, 0, 8),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 2),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -40, 0),

			BPF_JMP_IMM(BPF_JA, 0, 0, 5),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 2),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -48, 0),

			BPF_JMP_IMM(BPF_JA, 0, 0, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 1),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -56, 0),

			BPF_MOV64_IMM(BPF_REG_0, 0),

			BPF_EXIT_INSN(),

		},

		.result = ACCEPT,

	},

	{

		"jump test 3",

		.insns = {

			BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -8, 0),

			BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),

			BPF_JMP_IMM(BPF_JA, 0, 0, 19),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 1, 3),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -16, 0),

			BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),

			BPF_JMP_IMM(BPF_JA, 0, 0, 15),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 2, 3),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -32, 0),

			BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -32),

			BPF_JMP_IMM(BPF_JA, 0, 0, 11),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 3, 3),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -40, 0),

			BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -40),

			BPF_JMP_IMM(BPF_JA, 0, 0, 7),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 4, 3),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -48, 0),

			BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -48),

			BPF_JMP_IMM(BPF_JA, 0, 0, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 5, 0),

			BPF_ST_MEM(BPF_DW, BPF_REG_2, -56, 0),

			BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -56),

			BPF_LD_MAP_FD(BPF_REG_1, 0),

			BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_unspec),

			BPF_EXIT_INSN(),

		},

		.fixup = {24},

		.result = ACCEPT,

	},

	{

		"jump test 4",

		.insns = {

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 1),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 2),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 3),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 4),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),

			BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0),

			BPF_MOV64_IMM(BPF_REG_0, 0),

			BPF_EXIT_INSN(),

		},

		.result = ACCEPT,

	},

};



static int probe_filter_length(struct bpf_insn *fp)