[bpf-next,6/9] selftests/bpf: fix tests
diff mbox series

Message ID 20190613044738.3858896-7-ast@kernel.org
State Superseded
Headers show
Series
  • bpf: bounded loops and other features
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Commit Message

Alexei Starovoitov June 13, 2019, 4:47 a.m. UTC
Fix tests that assumed no loops.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
---
 tools/testing/selftests/bpf/test_verifier.c  | 11 ++++------
 tools/testing/selftests/bpf/verifier/calls.c | 22 ++++++++++++--------
 tools/testing/selftests/bpf/verifier/cfg.c   | 11 ++++++----
 3 files changed, 24 insertions(+), 20 deletions(-)

Patch
diff mbox series

diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index cd0248c54e25..93e1d87a343a 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -237,10 +237,10 @@  static void bpf_fill_scale1(struct bpf_test *self)
 		insn[i++] = BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6,
 					-8 * (k % 64 + 1));
 	}
-	/* every jump adds 1 step to insn_processed, so to stay exactly
-	 * within 1m limit add MAX_TEST_INSNS - MAX_JMP_SEQ - 1 MOVs and 1 EXIT
+	/* is_state_visited() doesn't allocate state for pruning for every jump.
+	 * Hence multiply jmps by 4 to accommodate that heuristic
 	 */
-	while (i < MAX_TEST_INSNS - MAX_JMP_SEQ - 1)
+	while (i < MAX_TEST_INSNS - MAX_JMP_SEQ * 4)
 		insn[i++] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 42);
 	insn[i] = BPF_EXIT_INSN();
 	self->prog_len = i + 1;
@@ -269,10 +269,7 @@  static void bpf_fill_scale2(struct bpf_test *self)
 		insn[i++] = BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6,
 					-8 * (k % (64 - 4 * FUNC_NEST) + 1));
 	}
-	/* every jump adds 1 step to insn_processed, so to stay exactly
-	 * within 1m limit add MAX_TEST_INSNS - MAX_JMP_SEQ - 1 MOVs and 1 EXIT
-	 */
-	while (i < MAX_TEST_INSNS - MAX_JMP_SEQ - 1)
+	while (i < MAX_TEST_INSNS - MAX_JMP_SEQ * 4)
 		insn[i++] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 42);
 	insn[i] = BPF_EXIT_INSN();
 	self->prog_len = i + 1;
diff --git a/tools/testing/selftests/bpf/verifier/calls.c b/tools/testing/selftests/bpf/verifier/calls.c
index 9093a8f64dc6..2d752c4f8d9d 100644
--- a/tools/testing/selftests/bpf/verifier/calls.c
+++ b/tools/testing/selftests/bpf/verifier/calls.c
@@ -215,9 +215,11 @@ 
 	BPF_MOV64_IMM(BPF_REG_0, 3),
 	BPF_JMP_IMM(BPF_JA, 0, 0, -6),
 	},
-	.prog_type = BPF_PROG_TYPE_TRACEPOINT,
-	.errstr = "back-edge from insn",
-	.result = REJECT,
+	.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
+	.errstr_unpriv = "back-edge from insn",
+	.result_unpriv = REJECT,
+	.result = ACCEPT,
+	.retval = 1,
 },
 {
 	"calls: conditional call 4",
@@ -250,22 +252,24 @@ 
 	BPF_MOV64_IMM(BPF_REG_0, 3),
 	BPF_EXIT_INSN(),
 	},
-	.prog_type = BPF_PROG_TYPE_TRACEPOINT,
-	.errstr = "back-edge from insn",
-	.result = REJECT,
+	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
+	.result = ACCEPT,
+	.retval = 1,
 },
 {
 	"calls: conditional call 6",
 	.insns = {
+	BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
+	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
 	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, -2),
+	BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, -3),
 	BPF_EXIT_INSN(),
 	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
 		    offsetof(struct __sk_buff, mark)),
 	BPF_EXIT_INSN(),
 	},
-	.prog_type = BPF_PROG_TYPE_TRACEPOINT,
-	.errstr = "back-edge from insn",
+	.prog_type = BPF_PROG_TYPE_SCHED_CLS,
+	.errstr = "infinite loop detected",
 	.result = REJECT,
 },
 {
diff --git a/tools/testing/selftests/bpf/verifier/cfg.c b/tools/testing/selftests/bpf/verifier/cfg.c
index 349c0862fb4c..4eb76ed739ce 100644
--- a/tools/testing/selftests/bpf/verifier/cfg.c
+++ b/tools/testing/selftests/bpf/verifier/cfg.c
@@ -41,7 +41,8 @@ 
 	BPF_JMP_IMM(BPF_JA, 0, 0, -1),
 	BPF_EXIT_INSN(),
 	},
-	.errstr = "back-edge",
+	.errstr = "unreachable insn 1",
+	.errstr_unpriv = "back-edge",
 	.result = REJECT,
 },
 {
@@ -53,18 +54,20 @@ 
 	BPF_JMP_IMM(BPF_JA, 0, 0, -4),
 	BPF_EXIT_INSN(),
 	},
-	.errstr = "back-edge",
+	.errstr = "unreachable insn 4",
+	.errstr_unpriv = "back-edge",
 	.result = REJECT,
 },
 {
 	"conditional loop",
 	.insns = {
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
+	BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
 	BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
 	BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
 	BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, -3),
 	BPF_EXIT_INSN(),
 	},
-	.errstr = "back-edge",
+	.errstr = "infinite loop detected",
+	.errstr_unpriv = "back-edge",
 	.result = REJECT,
 },