mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 16:38:12 +00:00
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>
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
{
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"bpf_map_ptr: read with negative offset rejected",
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.insns = {
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BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, -8),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.fixup_map_array_48b = { 1 },
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.result_unpriv = REJECT,
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.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
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.result = REJECT,
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.errstr = "R1 is bpf_array invalid negative access: off=-8",
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},
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{
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"bpf_map_ptr: write rejected",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_2, 0),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.fixup_map_array_48b = { 3 },
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.result_unpriv = REJECT,
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.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
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.result = REJECT,
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.errstr = "only read from bpf_array is supported",
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},
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{
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"bpf_map_ptr: read non-existent field rejected",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_6, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1, 1),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.fixup_map_array_48b = { 1 },
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.result_unpriv = REJECT,
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.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
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.result = REJECT,
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.errstr = "cannot access ptr member ops with moff 0 in struct bpf_map with off 1 size 4",
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.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
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},
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{
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"bpf_map_ptr: read ops field accepted",
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.insns = {
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BPF_MOV64_IMM(BPF_REG_6, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_LDX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),
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BPF_MOV64_IMM(BPF_REG_0, 1),
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BPF_EXIT_INSN(),
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},
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.fixup_map_array_48b = { 1 },
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.result_unpriv = REJECT,
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.errstr_unpriv = "bpf_array access is allowed only to CAP_PERFMON and CAP_SYS_ADMIN",
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.result = ACCEPT,
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.retval = 1,
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},
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{
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"bpf_map_ptr: r = 0, map_ptr = map_ptr + r",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_LD_MAP_FD(BPF_REG_1, 0),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.fixup_map_hash_16b = { 4 },
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.result_unpriv = REJECT,
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.errstr_unpriv = "R1 has pointer with unsupported alu operation",
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.result = ACCEPT,
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},
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{
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"bpf_map_ptr: r = 0, r = r + map_ptr",
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.insns = {
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BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
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BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
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BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
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BPF_MOV64_IMM(BPF_REG_1, 0),
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BPF_LD_MAP_FD(BPF_REG_0, 0),
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BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_0),
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BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
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BPF_MOV64_IMM(BPF_REG_0, 0),
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BPF_EXIT_INSN(),
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},
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.fixup_map_hash_16b = { 4 },
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.result_unpriv = REJECT,
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.errstr_unpriv = "R0 has pointer with unsupported alu operation",
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.result = ACCEPT,
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},
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