selftests/bpf: add verifier tests for bpf_call
Add extensive set of tests for bpf_call verification logic: calls: basic sanity calls: using r0 returned by callee calls: callee is using r1 calls: callee using args1 calls: callee using wrong args2 calls: callee using two args calls: callee changing pkt pointers calls: two calls with args calls: two calls with bad jump calls: recursive call. test1 calls: recursive call. test2 calls: unreachable code calls: invalid call calls: jumping across function bodies. test1 calls: jumping across function bodies. test2 calls: call without exit calls: call into middle of ld_imm64 calls: call into middle of other call calls: two calls with bad fallthrough calls: two calls with stack read calls: two calls with stack write calls: spill into caller stack frame calls: two calls with stack write and void return calls: ambiguous return value calls: two calls that return map_value calls: two calls that return map_value with bool condition calls: two calls that return map_value with incorrect bool check calls: two calls that receive map_value via arg=ptr_stack_of_caller. test1 calls: two calls that receive map_value via arg=ptr_stack_of_caller. test2 calls: two jumps that receive map_value via arg=ptr_stack_of_jumper. test3 calls: two calls that receive map_value_ptr_or_null via arg. test1 calls: two calls that receive map_value_ptr_or_null via arg. test2 calls: pkt_ptr spill into caller stack Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
parent
f4d7e40a5b
commit
a7ff3eca95
|
@ -2,6 +2,7 @@
|
|||
* Testsuite for eBPF verifier
|
||||
*
|
||||
* Copyright (c) 2014 PLUMgrid, http://plumgrid.com
|
||||
* Copyright (c) 2017 Facebook
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of version 2 of the GNU General Public
|
||||
|
@ -277,7 +278,7 @@ static struct bpf_test tests[] = {
|
|||
.insns = {
|
||||
BPF_ALU64_REG(BPF_MOV, BPF_REG_0, BPF_REG_2),
|
||||
},
|
||||
.errstr = "jump out of range",
|
||||
.errstr = "not an exit",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
|
@ -8097,6 +8098,964 @@ static struct bpf_test tests[] = {
|
|||
.result = REJECT,
|
||||
.prog_type = BPF_PROG_TYPE_CGROUP_SOCK,
|
||||
},
|
||||
{
|
||||
"calls: basic sanity",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 2),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: using r0 returned by callee",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 2),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: callee is using r1",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, len)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_ACT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: callee using args1",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "allowed for root only",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: callee using wrong args2",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "R2 !read_ok",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: callee using two args",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_6,
|
||||
offsetof(struct __sk_buff, len)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_6,
|
||||
offsetof(struct __sk_buff, len)),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_1),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "allowed for root only",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: callee changing pkt pointers",
|
||||
.insns = {
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
|
||||
offsetof(struct xdp_md, data)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
|
||||
offsetof(struct xdp_md, data_end)),
|
||||
BPF_MOV64_REG(BPF_REG_8, BPF_REG_6),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_8, 8),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_8, BPF_REG_7, 2),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
/* clear_all_pkt_pointers() has to walk all frames
|
||||
* to make sure that pkt pointers in the caller
|
||||
* are cleared when callee is calling a helper that
|
||||
* adjusts packet size
|
||||
*/
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),
|
||||
BPF_MOV32_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_2, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_xdp_adjust_head),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "R6 invalid mem access 'inv'",
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
},
|
||||
{
|
||||
"calls: two calls with args",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 6),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_7),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, len)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: two calls with bad jump",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 6),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_7),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, len)),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, -3),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "jump out of range from insn 11 to 9",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: recursive call. test1",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "back-edge",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: recursive call. test2",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -3),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "back-edge",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: unreachable code",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "unreachable insn 6",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: invalid call",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -4),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "invalid destination",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: jumping across function bodies. test1",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, -3),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "jump out of range",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: jumping across function bodies. test2",
|
||||
.insns = {
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "jump out of range",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: call without exit",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, -2),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "not an exit",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: call into middle of ld_imm64",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_LD_IMM64(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "last insn",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: call into middle of other call",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "last insn",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: two calls with bad fallthrough",
|
||||
.insns = {
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 6),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_7),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_0),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, len)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
|
||||
.errstr = "not an exit",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: two calls with stack read",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 6),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_7, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_7),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: two calls with stack write",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -16),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 7),
|
||||
BPF_MOV64_REG(BPF_REG_8, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_8, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_8),
|
||||
/* write into stack frame of main prog */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
/* read from stack frame of main prog */
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: spill into caller stack frame",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
.errstr = "cannot spill",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: two calls with stack write and void return",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -16),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
/* write into stack frame of main prog */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_1, 0, 0),
|
||||
BPF_EXIT_INSN(), /* void return */
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: ambiguous return value",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 5),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "allowed for root only",
|
||||
.result_unpriv = REJECT,
|
||||
.errstr = "R0 !read_ok",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"calls: two calls that return map_value",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 8),
|
||||
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
/* fetch secound map_value_ptr from the stack */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -16),
|
||||
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
/* call 3rd function twice */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* first time with fp-8 */
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
|
||||
/* second time with fp-16 */
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
/* lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
/* write map_value_ptr into stack frame of main prog */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(), /* return 0 */
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
.fixup_map1 = { 23 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: two calls that return map_value with bool condition",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
/* call 3rd function twice */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* first time with fp-8 */
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 9),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
|
||||
/* second time with fp-16 */
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 1, 2),
|
||||
/* fetch secound map_value_ptr from the stack */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
/* lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(), /* return 0 */
|
||||
/* write map_value_ptr into stack frame of main prog */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(), /* return 1 */
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
.fixup_map1 = { 23 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: two calls that return map_value with incorrect bool check",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
/* call 3rd function twice */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* first time with fp-8 */
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 9),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_7),
|
||||
/* second time with fp-16 */
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
/* fetch secound map_value_ptr from the stack */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
/* lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(), /* return 0 */
|
||||
/* write map_value_ptr into stack frame of main prog */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(), /* return 1 */
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_XDP,
|
||||
.fixup_map1 = { 23 },
|
||||
.result = REJECT,
|
||||
.errstr = "invalid read from stack off -16+0 size 8",
|
||||
},
|
||||
{
|
||||
"calls: two calls that receive map_value via arg=ptr_stack_of_caller. test1",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* 1st lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
|
||||
/* write map_value_ptr into stack frame of main prog at fp-8 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 1),
|
||||
|
||||
/* 2nd lookup from map */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), /* 20 */
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, /* 24 */
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
|
||||
/* write map_value_ptr into stack frame of main prog at fp-16 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 1),
|
||||
|
||||
/* call 3rd func with fp-8, 0|1, fp-16, 0|1 */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), /* 30 */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_8),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_7),
|
||||
BPF_MOV64_REG(BPF_REG_4, BPF_REG_9),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1), /* 34 */
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
/* if arg2 == 1 do *arg1 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_2, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
|
||||
/* if arg4 == 1 do *arg3 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_4, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_3, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 2, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map1 = { 12, 22 },
|
||||
.result = REJECT,
|
||||
.errstr = "invalid access to map value, value_size=8 off=2 size=8",
|
||||
},
|
||||
{
|
||||
"calls: two calls that receive map_value via arg=ptr_stack_of_caller. test2",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* 1st lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
|
||||
/* write map_value_ptr into stack frame of main prog at fp-8 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 1),
|
||||
|
||||
/* 2nd lookup from map */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), /* 20 */
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, /* 24 */
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
|
||||
/* write map_value_ptr into stack frame of main prog at fp-16 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 1),
|
||||
|
||||
/* call 3rd func with fp-8, 0|1, fp-16, 0|1 */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), /* 30 */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_8),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_7),
|
||||
BPF_MOV64_REG(BPF_REG_4, BPF_REG_9),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1), /* 34 */
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
/* if arg2 == 1 do *arg1 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_2, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
|
||||
/* if arg4 == 1 do *arg3 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_4, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_3, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map1 = { 12, 22 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: two jumps that receive map_value via arg=ptr_stack_of_jumper. test3",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* 1st lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -24, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -24),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
|
||||
/* write map_value_ptr into stack frame of main prog at fp-8 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 1),
|
||||
|
||||
/* 2nd lookup from map */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -24),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 0), // 26
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
|
||||
/* write map_value_ptr into stack frame of main prog at fp-16 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 1),
|
||||
|
||||
/* call 3rd func with fp-8, 0|1, fp-16, 0|1 */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6), // 30
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_8),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_7),
|
||||
BPF_MOV64_REG(BPF_REG_4, BPF_REG_9),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1), // 34
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, -30),
|
||||
|
||||
/* subprog 2 */
|
||||
/* if arg2 == 1 do *arg1 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_2, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
|
||||
/* if arg4 == 1 do *arg3 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_4, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_3, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 2, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, -8),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map1 = { 12, 22 },
|
||||
.result = REJECT,
|
||||
.errstr = "invalid access to map value, value_size=8 off=2 size=8",
|
||||
},
|
||||
{
|
||||
"calls: two calls that receive map_value_ptr_or_null via arg. test1",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* 1st lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
/* write map_value_ptr_or_null into stack frame of main prog at fp-8 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 1),
|
||||
|
||||
/* 2nd lookup from map */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
/* write map_value_ptr_or_null into stack frame of main prog at fp-16 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 1),
|
||||
|
||||
/* call 3rd func with fp-8, 0|1, fp-16, 0|1 */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_8),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_7),
|
||||
BPF_MOV64_REG(BPF_REG_4, BPF_REG_9),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
/* if arg2 == 1 do *arg1 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_2, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
|
||||
/* if arg4 == 1 do *arg3 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_4, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_3, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map1 = { 12, 22 },
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"calls: two calls that receive map_value_ptr_or_null via arg. test2",
|
||||
.insns = {
|
||||
/* main prog */
|
||||
/* pass fp-16, fp-8 into a function */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_2),
|
||||
/* 1st lookup from map */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
/* write map_value_ptr_or_null into stack frame of main prog at fp-8 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
|
||||
BPF_MOV64_IMM(BPF_REG_8, 1),
|
||||
|
||||
/* 2nd lookup from map */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_map_lookup_elem),
|
||||
/* write map_value_ptr_or_null into stack frame of main prog at fp-16 */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_7, BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 0),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
|
||||
BPF_MOV64_IMM(BPF_REG_9, 1),
|
||||
|
||||
/* call 3rd func with fp-8, 0|1, fp-16, 0|1 */
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_8),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_7),
|
||||
BPF_MOV64_REG(BPF_REG_4, BPF_REG_9),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 2 */
|
||||
/* if arg2 == 1 do *arg1 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_2, 1, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
|
||||
/* if arg4 == 0 do *arg3 = 0 */
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_4, 0, 2),
|
||||
/* fetch map_value_ptr from the stack of this function */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_3, 0),
|
||||
/* write into map value */
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map1 = { 12, 22 },
|
||||
.result = REJECT,
|
||||
.errstr = "R0 invalid mem access 'inv'",
|
||||
},
|
||||
{
|
||||
"calls: pkt_ptr spill into caller stack",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_4, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
|
||||
/* subprog 1 */
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, data)),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1,
|
||||
offsetof(struct __sk_buff, data_end)),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 8),
|
||||
/* spill unchecked pkt_ptr into stack of caller */
|
||||
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 2),
|
||||
/* now the pkt range is verified, read pkt_ptr from stack */
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_4, 0),
|
||||
/* write 4 bytes into packet */
|
||||
BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
};
|
||||
|
||||
static int probe_filter_length(const struct bpf_insn *fp)
|
||||
|
|
Loading…
Reference in New Issue