selftests/bpf: verifier/jeq_infer_not_null converted to inline assembly

Test verifier/jeq_infer_not_null automatically converted to use inline assembly.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20230421174234.2391278-9-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 0 insertions, 174 deletions

diff --git a/tools/testing/selftests/bpf/verifier/jeq_infer_not_null.c b/tools/testing/selftests/bpf/verifier/jeq_infer_not_null.c
deleted file mode 100644
index 67a1c07ead34..000000000000
--- a/tools/testing/selftests/bpf/verifier/jeq_infer_not_null.c
+++ /dev/null
@@ -1,174 +0,0 @@
-{
-	/* This is equivalent to the following program:
-	 *
-	 *   r6 = skb->sk;
-	 *   r7 = sk_fullsock(r6);
-	 *   r0 = sk_fullsock(r6);
-	 *   if (r0 == 0) return 0;    (a)
-	 *   if (r0 != r7) return 0;   (b)
-	 *   *r7->type;                (c)
-	 *   return 0;
-	 *
-	 * It is safe to dereference r7 at point (c), because of (a) and (b).
-	 * The test verifies that relation r0 == r7 is propagated from (b) to (c).
-	 */
-	"jne/jeq infer not null, PTR_TO_SOCKET_OR_NULL -> PTR_TO_SOCKET for JNE false branch",
-	.insns = {
-	/* r6 = skb->sk; */
-	BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, offsetof(struct __sk_buff, sk)),
-	/* if (r6 == 0) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_6, 0, 8),
-	/* r7 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
-	/* r0 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	/* if (r0 == null) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
-	/* if (r0 == r7) r0 = *(r7->type); */
-	BPF_JMP_REG(BPF_JNE, BPF_REG_0, BPF_REG_7, 1), /* Use ! JNE ! */
-	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, offsetof(struct bpf_sock, type)),
-	/* return 0 */
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_EXIT_INSN(),
-	},
-	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-	.result = ACCEPT,
-	.result_unpriv = REJECT,
-	.errstr_unpriv = "R7 pointer comparison",
-},
-{
-	/* Same as above, but verify that another branch of JNE still
-	 * prohibits access to PTR_MAYBE_NULL.
-	 */
-	"jne/jeq infer not null, PTR_TO_SOCKET_OR_NULL unchanged for JNE true branch",
-	.insns = {
-	/* r6 = skb->sk */
-	BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, offsetof(struct __sk_buff, sk)),
-	/* if (r6 == 0) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_6, 0, 9),
-	/* r7 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
-	/* r0 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	/* if (r0 == null) return 0; */
-	BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 3),
-	/* if (r0 == r7) return 0; */
-	BPF_JMP_REG(BPF_JNE, BPF_REG_0, BPF_REG_7, 1), /* Use ! JNE ! */
-	BPF_JMP_IMM(BPF_JA, 0, 0, 1),
-	/* r0 = *(r7->type); */
-	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, offsetof(struct bpf_sock, type)),
-	/* return 0 */
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_EXIT_INSN(),
-	},
-	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-	.result = REJECT,
-	.errstr = "R7 invalid mem access 'sock_or_null'",
-	.result_unpriv = REJECT,
-	.errstr_unpriv = "R7 pointer comparison",
-},
-{
-	/* Same as a first test, but not null should be inferred for JEQ branch */
-	"jne/jeq infer not null, PTR_TO_SOCKET_OR_NULL -> PTR_TO_SOCKET for JEQ true branch",
-	.insns = {
-	/* r6 = skb->sk; */
-	BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, offsetof(struct __sk_buff, sk)),
-	/* if (r6 == null) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_6, 0, 9),
-	/* r7 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
-	/* r0 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	/* if (r0 == null) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3),
-	/* if (r0 != r7) return 0; */
-	BPF_JMP_REG(BPF_JEQ, BPF_REG_0, BPF_REG_7, 1), /* Use ! JEQ ! */
-	BPF_JMP_IMM(BPF_JA, 0, 0, 1),
-	/* r0 = *(r7->type); */
-	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, offsetof(struct bpf_sock, type)),
-	/* return 0; */
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_EXIT_INSN(),
-	},
-	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-	.result = ACCEPT,
-	.result_unpriv = REJECT,
-	.errstr_unpriv = "R7 pointer comparison",
-},
-{
-	/* Same as above, but verify that another branch of JNE still
-	 * prohibits access to PTR_MAYBE_NULL.
-	 */
-	"jne/jeq infer not null, PTR_TO_SOCKET_OR_NULL unchanged for JEQ false branch",
-	.insns = {
-	/* r6 = skb->sk; */
-	BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, offsetof(struct __sk_buff, sk)),
-	/* if (r6 == null) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_6, 0, 8),
-	/* r7 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
-	/* r0 = sk_fullsock(skb); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
-	BPF_EMIT_CALL(BPF_FUNC_sk_fullsock),
-	/* if (r0 == null) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
-	/* if (r0 != r7) r0 = *(r7->type); */
-	BPF_JMP_REG(BPF_JEQ, BPF_REG_0, BPF_REG_7, 1), /* Use ! JEQ ! */
-	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, offsetof(struct bpf_sock, type)),
-	/* return 0; */
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_EXIT_INSN(),
-	},
-	.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
-	.result = REJECT,
-	.errstr = "R7 invalid mem access 'sock_or_null'",
-	.result_unpriv = REJECT,
-	.errstr_unpriv = "R7 pointer comparison",
-},
-{
-	/* Maps are treated in a different branch of `mark_ptr_not_null_reg`,
-	 * so separate test for maps case.
-	 */
-	"jne/jeq infer not null, PTR_TO_MAP_VALUE_OR_NULL -> PTR_TO_MAP_VALUE",
-	.insns = {
-	/* r9 = &some stack to use as key */
-	BPF_ST_MEM(BPF_W, BPF_REG_10, -8, 0),
-	BPF_MOV64_REG(BPF_REG_9, BPF_REG_10),
-	BPF_ALU64_IMM(BPF_ADD, BPF_REG_9, -8),
-	/* r8 = process local map */
-	BPF_LD_MAP_FD(BPF_REG_8, 0),
-	/* r6 = map_lookup_elem(r8, r9); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
-	BPF_MOV64_REG(BPF_REG_2, BPF_REG_9),
-	BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
-	BPF_MOV64_REG(BPF_REG_6, BPF_REG_0),
-	/* r7 = map_lookup_elem(r8, r9); */
-	BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
-	BPF_MOV64_REG(BPF_REG_2, BPF_REG_9),
-	BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
-	BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
-	/* if (r6 == 0) return 0; */
-	BPF_JMP_IMM(BPF_JEQ, BPF_REG_6, 0, 2),
-	/* if (r6 != r7) return 0; */
-	BPF_JMP_REG(BPF_JNE, BPF_REG_6, BPF_REG_7, 1),
-	/* read *r7; */
-	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_7, offsetof(struct bpf_xdp_sock, queue_id)),
-	/* return 0; */
-	BPF_MOV64_IMM(BPF_REG_0, 0),
-	BPF_EXIT_INSN(),
-	},
-	.fixup_map_xskmap = { 3 },
-	.prog_type = BPF_PROG_TYPE_XDP,
-	.result = ACCEPT,
-},