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linux/tools/testing/selftests/bpf/verifier/calls.c
Jakub Kicinski 83d163124c bpf: verifier: propagate liveness on all frames 
Commit 7640ead93924 ("bpf: verifier: make sure callees don't prune
with caller differences") connected up parentage chains of all
frames of the stack.  It didn't, however, ensure propagate_liveness()
propagates all liveness information along those chains.

This means pruning happening in the callee may generate explored
states with incomplete liveness for the chains in lower frames
of the stack.

The included selftest is similar to the prior one from commit
7640ead93924 ("bpf: verifier: make sure callees don't prune with
caller differences"), where callee would prune regardless of the
difference in r8 state.

Now we also initialize r9 to 0 or 1 based on a result from get_random().
r9 is never read so the walk with r9 = 0 gets pruned (correctly) after
the walk with r9 = 1 completes.

The selftest is so arranged that the pruning will happen in the
callee.  Since callee does not propagate read marks of r8, the
explored state at the pruning point prior to the callee will
now ignore r8.

Propagate liveness on all frames of the stack when pruning.

Fixes: f4d7e40a5b71 ("bpf: introduce function calls (verification)")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-03-21 19:57:02 -07:00

1968 lines
58 KiB
C
Raw Blame History

{
"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: not on unpriviledged",
.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(),
},
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.result_unpriv = REJECT,
.result = ACCEPT,
.retval = 1,
},
{
"calls: div by 0 in subprog",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 8),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 8),
BPF_JMP_REG(BPF_JGT, BPF_REG_2, BPF_REG_1, 1),
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
BPF_MOV32_IMM(BPF_REG_2, 0),
BPF_MOV32_IMM(BPF_REG_3, 1),
BPF_ALU32_REG(BPF_DIV, BPF_REG_3, BPF_REG_2),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
.retval = 1,
},
{
"calls: multiple ret types in subprog 1",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 8),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 8),
BPF_JMP_REG(BPF_JGT, BPF_REG_2, BPF_REG_1, 1),
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
BPF_MOV32_IMM(BPF_REG_0, 42),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = REJECT,
.errstr = "R0 invalid mem access 'inv'",
},
{
"calls: multiple ret types in subprog 2",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 8),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_REG(BPF_REG_2, BPF_REG_0),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 8),
BPF_JMP_REG(BPF_JGT, BPF_REG_2, BPF_REG_1, 1),
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, data)),
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 9),
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, 1),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_6,
offsetof(struct __sk_buff, data)),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 64),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.fixup_map_hash_8b = { 16 },
.result = REJECT,
.errstr = "R0 min value is outside of the array range",
},
{
"calls: overlapping caller/callee",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 0),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.errstr = "last insn is not an exit or jmp",
.result = REJECT,
},
{
"calls: wrong recursive calls",
.insns = {
BPF_JMP_IMM(BPF_JA, 0, 0, 4),
BPF_JMP_IMM(BPF_JA, 0, 0, 4),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -2),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -2),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -2),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.errstr = "jump out of range",
.result = REJECT,
},
{
"calls: wrong src reg",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 2, 0, 0),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.errstr = "BPF_CALL uses reserved fields",
.result = REJECT,
},
{
"calls: wrong off value",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, -1, 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,
.errstr = "BPF_CALL uses reserved fields",
.result = REJECT,
},
{
"calls: jump back loop",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -1),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.errstr = "back-edge from insn 0 to 0",
.result = REJECT,
},
{
"calls: conditional call",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, mark)),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3),
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,
.errstr = "jump out of range",
.result = REJECT,
},
{
"calls: conditional call 2",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, mark)),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 2),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.result = ACCEPT,
},
{
"calls: conditional call 3",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, mark)),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3),
BPF_JMP_IMM(BPF_JA, 0, 0, 4),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, -6),
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,
},
{
"calls: conditional call 4",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, mark)),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, -5),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.result = ACCEPT,
},
{
"calls: conditional call 5",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
offsetof(struct __sk_buff, mark)),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_0, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, -6),
BPF_MOV64_IMM(BPF_REG_0, 3),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.errstr = "back-edge from insn",
.result = REJECT,
},
{
"calls: conditional call 6",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, -2),
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",
.result = REJECT,
},
{
"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: using uninit r0 from callee",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
.errstr = "!read_ok",
.result = REJECT,
},
{
"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,
.retval = TEST_DATA_LEN,
},
{
"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,
.retval = POINTER_VALUE,
},
{
"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,
.retval = TEST_DATA_LEN + TEST_DATA_LEN - ETH_HLEN - ETH_HLEN,
},
{
"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,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"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,
.retval = TEST_DATA_LEN + TEST_DATA_LEN,
},
{
"calls: calls with stack arith",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -64),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -64),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -64),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
.retval = 42,
},
{
"calls: calls with misaligned stack access",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -63),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -61),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -63),
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_STX_MEM(BPF_DW, BPF_REG_2, BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.flags = F_LOAD_WITH_STRICT_ALIGNMENT,
.errstr = "misaligned stack access",
.result = REJECT,
},
{
"calls: calls control flow, jump test",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 43),
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
BPF_JMP_IMM(BPF_JA, 0, 0, -3),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
.retval = 43,
},
{
"calls: calls control flow, jump test 2",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 42),
BPF_JMP_IMM(BPF_JA, 0, 0, 2),
BPF_MOV64_IMM(BPF_REG_0, 43),
BPF_JMP_IMM(BPF_JA, 0, 0, 1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, -3),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.errstr = "jump out of range from insn 1 to 4",
.result = REJECT,
},
{
"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: invalid call 2",
.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, 0x7fffffff),
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: ld_abs with changing ctx data in callee",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_LD_ABS(BPF_B, 0),
BPF_LD_ABS(BPF_H, 0),
BPF_LD_ABS(BPF_W, 0),
BPF_MOV64_REG(BPF_REG_7, BPF_REG_6),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 5),
BPF_MOV64_REG(BPF_REG_6, BPF_REG_7),
BPF_LD_ABS(BPF_B, 0),
BPF_LD_ABS(BPF_H, 0),
BPF_LD_ABS(BPF_W, 0),
BPF_EXIT_INSN(),
BPF_MOV64_IMM(BPF_REG_2, 1),
BPF_MOV64_IMM(BPF_REG_3, 2),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_vlan_push),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.errstr = "BPF_LD_[ABS|IND] instructions cannot be mixed",
.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: stack overflow using two frames (pre-call access)",
.insns = {
/* prog 1 */
BPF_ST_MEM(BPF_B, BPF_REG_10, -300, 0),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1),
BPF_EXIT_INSN(),
/* prog 2 */
BPF_ST_MEM(BPF_B, BPF_REG_10, -300, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
.errstr = "combined stack size",
.result = REJECT,
},
{
"calls: stack overflow using two frames (post-call access)",
.insns = {
/* prog 1 */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 2),
BPF_ST_MEM(BPF_B, BPF_REG_10, -300, 0),
BPF_EXIT_INSN(),
/* prog 2 */
BPF_ST_MEM(BPF_B, BPF_REG_10, -300, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
.errstr = "combined stack size",
.result = REJECT,
},
{
"calls: stack depth check using three frames. test1",
.insns = {
/* main */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 4), /* call A */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 5), /* call B */
BPF_ST_MEM(BPF_B, BPF_REG_10, -32, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
/* A */
BPF_ST_MEM(BPF_B, BPF_REG_10, -256, 0),
BPF_EXIT_INSN(),
/* B */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, -3), /* call A */
BPF_ST_MEM(BPF_B, BPF_REG_10, -64, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
/* stack_main=32, stack_A=256, stack_B=64
* and max(main+A, main+A+B) < 512
*/
.result = ACCEPT,
},
{
"calls: stack depth check using three frames. test2",
.insns = {
/* main */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 4), /* call A */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 5), /* call B */
BPF_ST_MEM(BPF_B, BPF_REG_10, -32, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
/* A */
BPF_ST_MEM(BPF_B, BPF_REG_10, -64, 0),
BPF_EXIT_INSN(),
/* B */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, -3), /* call A */
BPF_ST_MEM(BPF_B, BPF_REG_10, -256, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
/* stack_main=32, stack_A=64, stack_B=256
* and max(main+A, main+A+B) < 512
*/
.result = ACCEPT,
},
{
"calls: stack depth check using three frames. test3",
.insns = {
/* main */
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 6), /* call A */
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 8), /* call B */
BPF_JMP_IMM(BPF_JGE, BPF_REG_6, 0, 1),
BPF_ST_MEM(BPF_B, BPF_REG_10, -64, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
/* A */
BPF_JMP_IMM(BPF_JLT, BPF_REG_1, 10, 1),
BPF_EXIT_INSN(),
BPF_ST_MEM(BPF_B, BPF_REG_10, -224, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, -3),
/* B */
BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 2, 1),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, -6), /* call A */
BPF_ST_MEM(BPF_B, BPF_REG_10, -256, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
/* stack_main=64, stack_A=224, stack_B=256
* and max(main+A, main+A+B) > 512
*/
.errstr = "combined stack",
.result = REJECT,
},
{
"calls: stack depth check using three frames. test4",
/* void main(void) {
* func1(0);
* func1(1);
* func2(1);
* }
* void func1(int alloc_or_recurse) {
* if (alloc_or_recurse) {
* frame_pointer[-300] = 1;
* } else {
* func2(alloc_or_recurse);
* }
* }
* void func2(int alloc_or_recurse) {
* if (alloc_or_recurse) {
* frame_pointer[-300] = 1;
* }
* }
*/
.insns = {
/* main */
BPF_MOV64_IMM(BPF_REG_1, 0),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 6), /* call A */
BPF_MOV64_IMM(BPF_REG_1, 1),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 4), /* call A */
BPF_MOV64_IMM(BPF_REG_1, 1),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 7), /* call B */
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
/* A */
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 2),
BPF_ST_MEM(BPF_B, BPF_REG_10, -300, 0),
BPF_EXIT_INSN(),
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call B */
BPF_EXIT_INSN(),
/* B */
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1),
BPF_ST_MEM(BPF_B, BPF_REG_10, -300, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
.result = REJECT,
.errstr = "combined stack",
},
{
"calls: stack depth check using three frames. test5",
.insns = {
/* main */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call A */
BPF_EXIT_INSN(),
/* A */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call B */
BPF_EXIT_INSN(),
/* B */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call C */
BPF_EXIT_INSN(),
/* C */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call D */
BPF_EXIT_INSN(),
/* D */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call E */
BPF_EXIT_INSN(),
/* E */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call F */
BPF_EXIT_INSN(),
/* F */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call G */
BPF_EXIT_INSN(),
/* G */
BPF_RAW_INSN(BPF_JMP|BPF_CALL, 0, 1, 0, 1), /* call H */
BPF_EXIT_INSN(),
/* H */
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
.errstr = "call stack",
.result = REJECT,
},
{
"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: write into caller stack frame",
.insns = {
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),
BPF_EXIT_INSN(),
BPF_ST_MEM(BPF_DW, BPF_REG_1, 0, 42),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
.result = ACCEPT,
.retval = 42,
},
{
"calls: write into callee stack frame",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 42),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, -8),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_XDP,
.errstr = "cannot return stack pointer",
.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_map_hash_8b = { 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_map_hash_8b = { 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_map_hash_8b = { 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_map_hash_8b = { 12, 22 },
.result = REJECT,
.errstr = "invalid access to map value, value_size=8 off=2 size=8",
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"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_map_hash_8b = { 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_map_hash_8b = { 12, 22 },
.result = REJECT,
.errstr = "invalid access to map value, value_size=8 off=2 size=8",
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"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_map_hash_8b = { 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_map_hash_8b = { 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,
.retval = POINTER_VALUE,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 2",
.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, 3),
/* Marking is still kept, but not in all cases safe. */
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_ST_MEM(BPF_W, BPF_REG_4, 0, 0),
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(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.errstr = "invalid access to packet",
.result = REJECT,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 3",
.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, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
/* Marking is still kept and safe here. */
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_ST_MEM(BPF_W, BPF_REG_4, 0, 0),
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_MOV64_IMM(BPF_REG_5, 0),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 3),
BPF_MOV64_IMM(BPF_REG_5, 1),
/* 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_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
.retval = 1,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 4",
.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, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
/* Check marking propagated. */
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_ST_MEM(BPF_W, BPF_REG_4, 0, 0),
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_MOV64_IMM(BPF_REG_5, 0),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 2),
BPF_MOV64_IMM(BPF_REG_5, 1),
/* don't read back pkt_ptr from stack here */
/* write 4 bytes into packet */
BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
.retval = 1,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 5",
.insns = {
BPF_MOV64_REG(BPF_REG_4, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8),
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_1, 0),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_4, 0),
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),
BPF_MOV64_IMM(BPF_REG_5, 0),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 3),
/* spill checked pkt_ptr into stack of caller */
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_5, 1),
/* don't read back pkt_ptr from stack here */
/* write 4 bytes into packet */
BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.errstr = "same insn cannot be used with different",
.result = REJECT,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 6",
.insns = {
BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1,
offsetof(struct __sk_buff, data_end)),
BPF_MOV64_REG(BPF_REG_4, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8),
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_4, 0),
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),
BPF_MOV64_IMM(BPF_REG_5, 0),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 3),
/* spill checked pkt_ptr into stack of caller */
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_5, 1),
/* don't read back pkt_ptr from stack here */
/* write 4 bytes into packet */
BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.errstr = "R4 invalid mem access",
.result = REJECT,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 7",
.insns = {
BPF_MOV64_IMM(BPF_REG_2, 0),
BPF_MOV64_REG(BPF_REG_4, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8),
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_4, 0),
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),
BPF_MOV64_IMM(BPF_REG_5, 0),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 3),
/* spill checked pkt_ptr into stack of caller */
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_5, 1),
/* don't read back pkt_ptr from stack here */
/* write 4 bytes into packet */
BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.errstr = "R4 invalid mem access",
.result = REJECT,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 8",
.insns = {
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),
BPF_JMP_REG(BPF_JLE, BPF_REG_0, BPF_REG_3, 1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_4, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8),
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_4, 0),
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),
BPF_MOV64_IMM(BPF_REG_5, 0),
BPF_JMP_REG(BPF_JGT, BPF_REG_0, BPF_REG_3, 3),
/* spill checked pkt_ptr into stack of caller */
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_5, 1),
/* don't read back pkt_ptr from stack here */
/* write 4 bytes into packet */
BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.result = ACCEPT,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: pkt_ptr spill into caller stack 9",
.insns = {
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),
BPF_JMP_REG(BPF_JLE, BPF_REG_0, BPF_REG_3, 1),
BPF_EXIT_INSN(),
BPF_MOV64_REG(BPF_REG_4, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_4, -8),
BPF_STX_MEM(BPF_DW, BPF_REG_4, BPF_REG_2, 0),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 3),
BPF_LDX_MEM(BPF_DW, BPF_REG_4, BPF_REG_10, -8),
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_4, 0),
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),
BPF_MOV64_IMM(BPF_REG_5, 0),
/* 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),
BPF_MOV64_IMM(BPF_REG_5, 1),
/* don't read back pkt_ptr from stack here */
/* write 4 bytes into packet */
BPF_ST_MEM(BPF_W, BPF_REG_2, 0, 0),
BPF_MOV64_REG(BPF_REG_0, BPF_REG_5),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
.errstr = "invalid access to packet",
.result = REJECT,
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
},
{
"calls: caller stack init to zero or map_value_or_null",
.insns = {
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_0, -8),
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
/* fetch map_value_or_null or const_zero from stack */
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_10, -8),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1),
/* store into map_value */
BPF_ST_MEM(BPF_W, BPF_REG_0, 0, 0),
BPF_EXIT_INSN(),
/* subprog 1 */
/* if (ctx == 0) return; */
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 8),
/* else bpf_map_lookup() and *(fp - 8) = r0 */
BPF_MOV64_REG(BPF_REG_6, BPF_REG_2),
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_ST_MEM(BPF_DW, BPF_REG_10, -8, 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_EXIT_INSN(),
},
.fixup_map_hash_8b = { 13 },
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_XDP,
},
{
"calls: stack init to zero and pruning",
.insns = {
/* first make allocated_stack 16 byte */
BPF_ST_MEM(BPF_DW, BPF_REG_10, -16, 0),
/* now fork the execution such that the false branch
* of JGT insn will be verified second and it skisp zero
* init of fp-8 stack slot. If stack liveness marking
* is missing live_read marks from call map_lookup
* processing then pruning will incorrectly assume
* that fp-8 stack slot was unused in the fall-through
* branch and will accept the program incorrectly
*/
BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 2, 2),
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
BPF_JMP_IMM(BPF_JA, 0, 0, 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_EXIT_INSN(),
},
.fixup_map_hash_48b = { 6 },
.errstr = "invalid indirect read from stack off -8+0 size 8",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_XDP,
},
{
"calls: ctx read at start of subprog",
.insns = {
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 5),
BPF_JMP_REG(BPF_JSGT, BPF_REG_0, BPF_REG_0, 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_LDX_MEM(BPF_B, BPF_REG_9, BPF_REG_1, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.result_unpriv = REJECT,
.result = ACCEPT,
},
{
"calls: cross frame pruning",
.insns = {
/* r8 = !!random();
* call pruner()
* if (r8)
* do something bad;
*/
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32),
BPF_MOV64_IMM(BPF_REG_8, 0),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
BPF_MOV64_IMM(BPF_REG_8, 1),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_8),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_8, 1, 1),
BPF_LDX_MEM(BPF_B, BPF_REG_9, BPF_REG_1, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.errstr = "!read_ok",
.result = REJECT,
},
{
"calls: cross frame pruning - liveness propagation",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32),
BPF_MOV64_IMM(BPF_REG_8, 0),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
BPF_MOV64_IMM(BPF_REG_8, 1),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_prandom_u32),
BPF_MOV64_IMM(BPF_REG_9, 0),
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
BPF_MOV64_IMM(BPF_REG_9, 1),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 4),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_8, 1, 1),
BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0),
BPF_EXIT_INSN(),
},
.prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
.errstr_unpriv = "function calls to other bpf functions are allowed for root only",
.errstr = "!read_ok",
.result = REJECT,
},
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