d7a5091351
Update various selftest error messages: * The 'Rx tried to sub from different maps, paths, or prohibited types' is reworked into more specific/differentiated error messages for better guidance. * The change into 'value -4294967168 makes map_value pointer be out of bounds' is due to moving the mixed bounds check into the speculation handling and thus occuring slightly later than above mentioned sanity check. * The change into 'math between map_value pointer and register with unbounded min value' is similarly due to register sanity check coming before the mixed bounds check. * The case of 'map access: known scalar += value_ptr from different maps' now loads fine given masks are the same from the different paths (despite max map value size being different). Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Alexei Starovoitov <ast@kernel.org>
136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
{
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"check deducing bounds from const, 1",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 1, 0),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.errstr = "R0 tried to subtract pointer from scalar",
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.result = REJECT,
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},
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{
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"check deducing bounds from const, 2",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 1, 1),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JSLE, BPF_REG_0, 1, 1),
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BPF_EXIT_INSN(),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_0),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.result_unpriv = REJECT,
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.result = ACCEPT,
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.retval = 1,
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},
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{
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"check deducing bounds from const, 3",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSLE, BPF_REG_0, 0, 0),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.errstr = "R0 tried to subtract pointer from scalar",
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.result = REJECT,
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},
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{
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"check deducing bounds from const, 4",
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.insns = {
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BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSLE, BPF_REG_0, 0, 1),
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BPF_EXIT_INSN(),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 0, 1),
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BPF_EXIT_INSN(),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_6, BPF_REG_0),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R6 has pointer with unsupported alu operation",
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.result_unpriv = REJECT,
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.result = ACCEPT,
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},
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{
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"check deducing bounds from const, 5",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 1, 1),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.errstr = "R0 tried to subtract pointer from scalar",
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.result = REJECT,
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},
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{
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"check deducing bounds from const, 6",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 0, 1),
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BPF_EXIT_INSN(),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.errstr = "R0 tried to subtract pointer from scalar",
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.result = REJECT,
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},
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{
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"check deducing bounds from const, 7",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, ~0),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 0, 0),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
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offsetof(struct __sk_buff, mark)),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.errstr = "dereference of modified ctx ptr",
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.result = REJECT,
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.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
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},
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{
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"check deducing bounds from const, 8",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, ~0),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 0, 1),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
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BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
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offsetof(struct __sk_buff, mark)),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.errstr = "dereference of modified ctx ptr",
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.result = REJECT,
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.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
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},
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{
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"check deducing bounds from const, 9",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSGE, BPF_REG_0, 0, 0),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.errstr = "R0 tried to subtract pointer from scalar",
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.result = REJECT,
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},
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{
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"check deducing bounds from const, 10",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_JMP_IMM(BPF_JSLE, BPF_REG_0, 0, 0),
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/* Marks reg as unknown. */
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BPF_ALU64_IMM(BPF_NEG, BPF_REG_0, 0),
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BPF_ALU64_REG(BPF_SUB, BPF_REG_0, BPF_REG_1),
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BPF_EXIT_INSN(),
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},
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.errstr = "math between ctx pointer and register with unbounded min value is not allowed",
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.result = REJECT,
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},
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