From 40f2fbd5a5e9c6d0799632fcba174a7b45c471da Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Fri, 25 Jan 2019 15:24:43 -0800 Subject: selftests: bpf: break up test_verifier Break up the first 10 kLoC of test verifier test cases out into smaller files. Looks like git line counting gets a little flismy above 16 bit integers, so we need two commits to break up test_verifier. Signed-off-by: Jakub Kicinski Acked-by: Jiong Wang Signed-off-by: Alexei Starovoitov --- tools/testing/selftests/bpf/verifier/stack_ptr.c | 317 +++++++++++++++++++++++ 1 file changed, 317 insertions(+) create mode 100644 tools/testing/selftests/bpf/verifier/stack_ptr.c (limited to 'tools/testing/selftests/bpf/verifier/stack_ptr.c') diff --git a/tools/testing/selftests/bpf/verifier/stack_ptr.c b/tools/testing/selftests/bpf/verifier/stack_ptr.c new file mode 100644 index 000000000000..7276620ef242 --- /dev/null +++ b/tools/testing/selftests/bpf/verifier/stack_ptr.c @@ -0,0 +1,317 @@ +{ + "PTR_TO_STACK store/load", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -10), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 2, 0xfaceb00c), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 0xfaceb00c, +}, +{ + "PTR_TO_STACK store/load - bad alignment on off", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 2, 0xfaceb00c), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 2), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "misaligned stack access off (0x0; 0x0)+-8+2 size 8", +}, +{ + "PTR_TO_STACK store/load - bad alignment on reg", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -10), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 8, 0xfaceb00c), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 8), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "misaligned stack access off (0x0; 0x0)+-10+8 size 8", +}, +{ + "PTR_TO_STACK store/load - out of bounds low", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -80000), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 8, 0xfaceb00c), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 8), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "invalid stack off=-79992 size=8", + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", +}, +{ + "PTR_TO_STACK store/load - out of bounds high", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8), + BPF_ST_MEM(BPF_DW, BPF_REG_1, 8, 0xfaceb00c), + BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 8), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "invalid stack off=0 size=8", +}, +{ + "PTR_TO_STACK check high 1", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -1), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 42, +}, +{ + "PTR_TO_STACK check high 2", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ST_MEM(BPF_B, BPF_REG_1, -1, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, -1), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 42, +}, +{ + "PTR_TO_STACK check high 3", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0), + BPF_ST_MEM(BPF_B, BPF_REG_1, -1, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, -1), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .result_unpriv = REJECT, + .result = ACCEPT, + .retval = 42, +}, +{ + "PTR_TO_STACK check high 4", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .errstr = "invalid stack off=0 size=1", + .result = REJECT, +}, +{ + "PTR_TO_STACK check high 5", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "invalid stack off", +}, +{ + "PTR_TO_STACK check high 6", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1), + BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MAX, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MAX), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "invalid stack off", +}, +{ + "PTR_TO_STACK check high 7", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1), + BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MAX, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MAX), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .errstr = "fp pointer offset", +}, +{ + "PTR_TO_STACK check low 1", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -512), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 42, +}, +{ + "PTR_TO_STACK check low 2", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -513), + BPF_ST_MEM(BPF_B, BPF_REG_1, 1, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 1), + BPF_EXIT_INSN(), + }, + .result_unpriv = REJECT, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .result = ACCEPT, + .retval = 42, +}, +{ + "PTR_TO_STACK check low 3", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -513), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .errstr = "invalid stack off=-513 size=1", + .result = REJECT, +}, +{ + "PTR_TO_STACK check low 4", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, INT_MIN), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "math between fp pointer", +}, +{ + "PTR_TO_STACK check low 5", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "invalid stack off", +}, +{ + "PTR_TO_STACK check low 6", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)), + BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MIN, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MIN), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr = "invalid stack off", +}, +{ + "PTR_TO_STACK check low 7", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)), + BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MIN, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MIN), + BPF_EXIT_INSN(), + }, + .result = REJECT, + .errstr_unpriv = "R1 stack pointer arithmetic goes out of range", + .errstr = "fp pointer offset", +}, +{ + "PTR_TO_STACK mixed reg/k, 1", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -3), + BPF_MOV64_IMM(BPF_REG_2, -3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 42, +}, +{ + "PTR_TO_STACK mixed reg/k, 2", + .insns = { + BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0), + BPF_ST_MEM(BPF_DW, BPF_REG_10, -16, 0), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -3), + BPF_MOV64_IMM(BPF_REG_2, -3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_MOV64_REG(BPF_REG_5, BPF_REG_10), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_5, -6), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = 42, +}, +{ + "PTR_TO_STACK mixed reg/k, 3", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -3), + BPF_MOV64_IMM(BPF_REG_2, -3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_MOV64_REG(BPF_REG_0, BPF_REG_2), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .retval = -3, +}, +{ + "PTR_TO_STACK reg", + .insns = { + BPF_MOV64_REG(BPF_REG_1, BPF_REG_10), + BPF_MOV64_IMM(BPF_REG_2, -3), + BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2), + BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42), + BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0), + BPF_EXIT_INSN(), + }, + .result_unpriv = REJECT, + .errstr_unpriv = "invalid stack off=0 size=1", + .result = ACCEPT, + .retval = 42, +}, +{ + "stack pointer arithmetic", + .insns = { + BPF_MOV64_IMM(BPF_REG_1, 4), + BPF_JMP_IMM(BPF_JA, 0, 0, 0), + BPF_MOV64_REG(BPF_REG_7, BPF_REG_10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -10), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -10), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_7), + BPF_ALU64_REG(BPF_ADD, BPF_REG_2, BPF_REG_1), + BPF_ST_MEM(0, BPF_REG_2, 4, 0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_7), + BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 8), + BPF_ST_MEM(0, BPF_REG_2, 4, 0), + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, +}, -- cgit v1.2.3