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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/bpf/verifier/unpriv.c | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/verifier/unpriv.c')
-rw-r--r-- | tools/testing/selftests/bpf/verifier/unpriv.c | 538 |
1 files changed, 538 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/unpriv.c b/tools/testing/selftests/bpf/verifier/unpriv.c new file mode 100644 index 000000000..9dfb68c8c --- /dev/null +++ b/tools/testing/selftests/bpf/verifier/unpriv.c @@ -0,0 +1,538 @@ +{ + "unpriv: return pointer", + .insns = { + BPF_MOV64_REG(BPF_REG_0, BPF_REG_10), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .result_unpriv = REJECT, + .errstr_unpriv = "R0 leaks addr", + .retval = POINTER_VALUE, +}, +{ + "unpriv: add const to pointer", + .insns = { + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 8), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, +}, +{ + "unpriv: add pointer to pointer", + .insns = { + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_10), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "R1 pointer += pointer", +}, +{ + "unpriv: neg pointer", + .insns = { + BPF_ALU64_IMM(BPF_NEG, BPF_REG_1, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .result_unpriv = REJECT, + .errstr_unpriv = "R1 pointer arithmetic", +}, +{ + "unpriv: cmp pointer with const", + .insns = { + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .result_unpriv = REJECT, + .errstr_unpriv = "R1 pointer comparison", +}, +{ + "unpriv: cmp pointer with pointer", + .insns = { + BPF_JMP_REG(BPF_JEQ, BPF_REG_1, BPF_REG_10, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .result_unpriv = REJECT, + .errstr_unpriv = "R10 pointer comparison", +}, +{ + "unpriv: check that printk is disallowed", + .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_MOV64_IMM(BPF_REG_2, 8), + BPF_MOV64_REG(BPF_REG_3, BPF_REG_1), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_trace_printk), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "unknown func bpf_trace_printk#6", + .result_unpriv = REJECT, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, +}, +{ + "unpriv: pass pointer to helper function", + .insns = { + 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_MOV64_REG(BPF_REG_3, BPF_REG_2), + BPF_MOV64_REG(BPF_REG_4, BPF_REG_2), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_update_elem), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_8b = { 3 }, + .errstr_unpriv = "R4 leaks addr", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: indirectly pass pointer on stack to helper function", + .insns = { + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8), + 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_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_8b = { 3 }, + .errstr_unpriv = "invalid indirect read from stack R2 off -8+0 size 8", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: mangle pointer on stack 1", + .insns = { + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8), + BPF_ST_MEM(BPF_W, BPF_REG_10, -8, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "attempt to corrupt spilled", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: mangle pointer on stack 2", + .insns = { + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8), + BPF_ST_MEM(BPF_B, BPF_REG_10, -1, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "attempt to corrupt spilled", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: read pointer from stack in small chunks", + .insns = { + BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_10, -8), + BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_10, -8), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "invalid size", + .result = REJECT, +}, +{ + "unpriv: write pointer into ctx", + .insns = { + BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R1 leaks addr", + .result_unpriv = REJECT, + .errstr = "invalid bpf_context access", + .result = REJECT, +}, +{ + "unpriv: spill/fill of ctx", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, +}, +{ + "unpriv: spill/fill of ctx 2", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of ctx 3", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "R1 type=fp expected=ctx", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of ctx 4", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_DW, BPF_REG_10, BPF_REG_0, -8, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_hash_recalc), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "R1 type=inv expected=ctx", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of different pointers stx", + .insns = { + BPF_MOV64_IMM(BPF_REG_3, 42), + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -16), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0), + BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3, + offsetof(struct __sk_buff, mark)), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "same insn cannot be used with different pointers", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of different pointers stx - ctx and sock", + .insns = { + BPF_MOV64_REG(BPF_REG_8, BPF_REG_1), + /* struct bpf_sock *sock = bpf_sock_lookup(...); */ + BPF_SK_LOOKUP(sk_lookup_tcp), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + /* u64 foo; */ + /* void *target = &foo; */ + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_8), + /* if (skb == NULL) *target = sock; */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0), + /* else *target = skb; */ + BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + /* struct __sk_buff *skb = *target; */ + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + /* skb->mark = 42; */ + BPF_MOV64_IMM(BPF_REG_3, 42), + BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3, + offsetof(struct __sk_buff, mark)), + /* if (sk) bpf_sk_release(sk) */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_EMIT_CALL(BPF_FUNC_sk_release), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "type=ctx expected=sock", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of different pointers stx - leak sock", + .insns = { + BPF_MOV64_REG(BPF_REG_8, BPF_REG_1), + /* struct bpf_sock *sock = bpf_sock_lookup(...); */ + BPF_SK_LOOKUP(sk_lookup_tcp), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + /* u64 foo; */ + /* void *target = &foo; */ + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_8), + /* if (skb == NULL) *target = sock; */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0), + /* else *target = skb; */ + BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + /* struct __sk_buff *skb = *target; */ + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + /* skb->mark = 42; */ + BPF_MOV64_IMM(BPF_REG_3, 42), + BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3, + offsetof(struct __sk_buff, mark)), + BPF_EXIT_INSN(), + }, + .result = REJECT, + //.errstr = "same insn cannot be used with different pointers", + .errstr = "Unreleased reference", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of different pointers stx - sock and ctx (read)", + .insns = { + BPF_MOV64_REG(BPF_REG_8, BPF_REG_1), + /* struct bpf_sock *sock = bpf_sock_lookup(...); */ + BPF_SK_LOOKUP(sk_lookup_tcp), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + /* u64 foo; */ + /* void *target = &foo; */ + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_8), + /* if (skb) *target = skb */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + /* else *target = sock */ + BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0), + /* struct bpf_sock *sk = *target; */ + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + /* if (sk) u32 foo = sk->mark; bpf_sk_release(sk); */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 2), + BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, + offsetof(struct bpf_sock, mark)), + BPF_EMIT_CALL(BPF_FUNC_sk_release), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "same insn cannot be used with different pointers", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of different pointers stx - sock and ctx (write)", + .insns = { + BPF_MOV64_REG(BPF_REG_8, BPF_REG_1), + /* struct bpf_sock *sock = bpf_sock_lookup(...); */ + BPF_SK_LOOKUP(sk_lookup_tcp), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + /* u64 foo; */ + /* void *target = &foo; */ + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_8), + /* if (skb) *target = skb */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + /* else *target = sock */ + BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0), + /* struct bpf_sock *sk = *target; */ + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + /* if (sk) sk->mark = 42; bpf_sk_release(sk); */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3), + BPF_MOV64_IMM(BPF_REG_3, 42), + BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_3, + offsetof(struct bpf_sock, mark)), + BPF_EMIT_CALL(BPF_FUNC_sk_release), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + //.errstr = "same insn cannot be used with different pointers", + .errstr = "cannot write into sock", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, +{ + "unpriv: spill/fill of different pointers ldx", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 3), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, + -(__s32)offsetof(struct bpf_perf_event_data, + sample_period) - 8), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_2, 0), + BPF_JMP_IMM(BPF_JNE, BPF_REG_1, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_6, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_1, + offsetof(struct bpf_perf_event_data, sample_period)), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "same insn cannot be used with different pointers", + .prog_type = BPF_PROG_TYPE_PERF_EVENT, +}, +{ + "unpriv: write pointer into map elem value", + .insns = { + 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_JEQ, BPF_REG_0, 0, 1), + BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_8b = { 3 }, + .errstr_unpriv = "R0 leaks addr", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "alu32: mov u32 const", + .insns = { + BPF_MOV32_IMM(BPF_REG_7, 0), + BPF_ALU32_IMM(BPF_AND, BPF_REG_7, 1), + BPF_MOV32_REG(BPF_REG_0, BPF_REG_7), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 1), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_7, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R7 invalid mem access 'inv'", + .result_unpriv = REJECT, + .result = ACCEPT, + .retval = 0, +}, +{ + "unpriv: partial copy of pointer", + .insns = { + BPF_MOV32_REG(BPF_REG_1, BPF_REG_10), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R10 partial copy", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: pass pointer to tail_call", + .insns = { + BPF_MOV64_REG(BPF_REG_3, BPF_REG_1), + BPF_LD_MAP_FD(BPF_REG_2, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tail_call), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .fixup_prog1 = { 1 }, + .errstr_unpriv = "R3 leaks addr into helper", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: cmp map pointer with zero", + .insns = { + BPF_MOV64_IMM(BPF_REG_1, 0), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .fixup_map_hash_8b = { 1 }, + .errstr_unpriv = "R1 pointer comparison", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: write into frame pointer", + .insns = { + BPF_MOV64_REG(BPF_REG_10, BPF_REG_1), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "frame pointer is read only", + .result = REJECT, +}, +{ + "unpriv: spill/fill frame pointer", + .insns = { + BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8), + BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_10, 0), + BPF_LDX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "frame pointer is read only", + .result = REJECT, +}, +{ + "unpriv: cmp of frame pointer", + .insns = { + BPF_JMP_IMM(BPF_JEQ, BPF_REG_10, 0, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R10 pointer comparison", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: adding of fp, reg", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_MOV64_IMM(BPF_REG_1, 0), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_10), + BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, -8), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: adding of fp, imm", + .insns = { + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0), + BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, -8), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .result_unpriv = REJECT, + .result = ACCEPT, +}, +{ + "unpriv: cmp of stack pointer", + .insns = { + BPF_MOV64_REG(BPF_REG_2, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8), + BPF_JMP_IMM(BPF_JEQ, BPF_REG_2, 0, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R2 pointer comparison", + .result_unpriv = REJECT, + .result = ACCEPT, +}, |