diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/verifier/bounds.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/bounds.c b/tools/testing/selftests/bpf/verifier/bounds.c index 33125d5f6772..74b1917d4208 100644 --- a/tools/testing/selftests/bpf/verifier/bounds.c +++ b/tools/testing/selftests/bpf/verifier/bounds.c @@ -753,3 +753,124 @@ .result_unpriv = REJECT, .result = ACCEPT, }, +{ + "bound check with JMP_JLT for crossing 64-bit signed boundary", + .insns = { + BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)), + BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1), + BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8), + + BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0), + BPF_LD_IMM64(BPF_REG_0, 0x7fffffffffffff10), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0), + + BPF_LD_IMM64(BPF_REG_0, 0x8000000000000000), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1), + /* r1 unsigned range is [0x7fffffffffffff10, 0x800000000000000f] */ + BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2), + + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_XDP, +}, +{ + "bound check with JMP_JSLT for crossing 64-bit signed boundary", + .insns = { + BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)), + BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1), + BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8), + + BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0), + BPF_LD_IMM64(BPF_REG_0, 0x7fffffffffffff10), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0), + + BPF_LD_IMM64(BPF_REG_0, 0x8000000000000000), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1), + /* r1 signed range is [S64_MIN, S64_MAX] */ + BPF_JMP_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -2), + + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "BPF program is too large", + .result = REJECT, + .prog_type = BPF_PROG_TYPE_XDP, +}, +{ + "bound check for loop upper bound greater than U32_MAX", + .insns = { + BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)), + BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1), + BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 8), + + BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0), + BPF_LD_IMM64(BPF_REG_0, 0x100000000), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0), + + BPF_LD_IMM64(BPF_REG_0, 0x100000000), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 1), + BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2), + + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_XDP, +}, +{ + "bound check with JMP32_JLT for crossing 32-bit signed boundary", + .insns = { + BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)), + BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1), + BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 6), + + BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0), + BPF_MOV32_IMM(BPF_REG_0, 0x7fffff10), + BPF_ALU32_REG(BPF_ADD, BPF_REG_1, BPF_REG_0), + + BPF_MOV32_IMM(BPF_REG_0, 0x80000000), + BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 1), + /* r1 unsigned range is [0, 0x8000000f] */ + BPF_JMP32_REG(BPF_JLT, BPF_REG_0, BPF_REG_1, -2), + + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_XDP, +}, +{ + "bound check with JMP32_JSLT for crossing 32-bit signed boundary", + .insns = { + BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, offsetof(struct xdp_md, data)), + BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_1, offsetof(struct xdp_md, data_end)), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_2), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 1), + BPF_JMP_REG(BPF_JGT, BPF_REG_1, BPF_REG_3, 6), + + BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_2, 0), + BPF_MOV32_IMM(BPF_REG_0, 0x7fffff10), + BPF_ALU32_REG(BPF_ADD, BPF_REG_1, BPF_REG_0), + + BPF_MOV32_IMM(BPF_REG_0, 0x80000000), + BPF_ALU32_IMM(BPF_ADD, BPF_REG_0, 1), + /* r1 signed range is [S32_MIN, S32_MAX] */ + BPF_JMP32_REG(BPF_JSLT, BPF_REG_0, BPF_REG_1, -2), + + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .errstr = "BPF program is too large", + .result = REJECT, + .prog_type = BPF_PROG_TYPE_XDP, +}, |