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selftests/bpf: verifier/helper_restricted.c converted to inline assembly

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Test verifier/helper_restricted.c automatically converted to use inline assembly.

Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20230325025524.144043-23-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Eduard Zingerman 2023-03-25 04:55:03 +02:00 committed by Alexei Starovoitov
parent fb179fe69e
commit 77aa2563cb
3 changed files with 281 additions and 196 deletions
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2
tools/testing/selftests/bpf/prog_tests/verifier.c
View File

@ -19,6 +19,7 @@
#include "verifier_div_overflow.skel.h"
#include "verifier_helper_access_var_len.skel.h"
#include "verifier_helper_packet_access.skel.h"
#include "verifier_helper_restricted.skel.h"
__maybe_unused
static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_factory)
@ -60,3 +61,4 @@ void test_verifier_div0(void) { RUN(verifier_div0); }
void test_verifier_div_overflow(void) { RUN(verifier_div_overflow); }
void test_verifier_helper_access_var_len(void) { RUN(verifier_helper_access_var_len); }
void test_verifier_helper_packet_access(void) { RUN(verifier_helper_packet_access); }
void test_verifier_helper_restricted(void) { RUN(verifier_helper_restricted); }

279
tools/testing/selftests/bpf/progs/verifier_helper_restricted.c Normal file
View File

@ -0,0 +1,279 @@
// SPDX-License-Identifier: GPL-2.0
/* Converted from tools/testing/selftests/bpf/verifier/helper_restricted.c */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
struct val {
int cnt;
struct bpf_spin_lock l;
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, int);
__type(value, struct val);
} map_spin_lock SEC(".maps");
struct timer {
struct bpf_timer t;
};
struct {
__uint(type, BPF_MAP_TYPE_ARRAY);
__uint(max_entries, 1);
__type(key, int);
__type(value, struct timer);
} map_timer SEC(".maps");
SEC("kprobe")
__description("bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_KPROBE")
__failure __msg("unknown func bpf_ktime_get_coarse_ns")
__naked void in_bpf_prog_type_kprobe_1(void)
{
asm volatile (" \
call %[bpf_ktime_get_coarse_ns]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_ktime_get_coarse_ns)
: __clobber_all);
}
SEC("tracepoint")
__description("bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_TRACEPOINT")
__failure __msg("unknown func bpf_ktime_get_coarse_ns")
__naked void in_bpf_prog_type_tracepoint_1(void)
{
asm volatile (" \
call %[bpf_ktime_get_coarse_ns]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_ktime_get_coarse_ns)
: __clobber_all);
}
SEC("perf_event")
__description("bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_PERF_EVENT")
__failure __msg("unknown func bpf_ktime_get_coarse_ns")
__naked void bpf_prog_type_perf_event_1(void)
{
asm volatile (" \
call %[bpf_ktime_get_coarse_ns]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_ktime_get_coarse_ns)
: __clobber_all);
}
SEC("raw_tracepoint")
__description("bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_RAW_TRACEPOINT")
__failure __msg("unknown func bpf_ktime_get_coarse_ns")
__naked void bpf_prog_type_raw_tracepoint_1(void)
{
asm volatile (" \
call %[bpf_ktime_get_coarse_ns]; \
r0 = 0; \
exit; \
" :
: __imm(bpf_ktime_get_coarse_ns)
: __clobber_all);
}
SEC("kprobe")
__description("bpf_timer_init isn restricted in BPF_PROG_TYPE_KPROBE")
__failure __msg("tracing progs cannot use bpf_timer yet")
__naked void in_bpf_prog_type_kprobe_2(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_timer] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
r2 = %[map_timer] ll; \
r3 = 1; \
l0_%=: call %[bpf_timer_init]; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_timer_init),
__imm_addr(map_timer)
: __clobber_all);
}
SEC("perf_event")
__description("bpf_timer_init is forbidden in BPF_PROG_TYPE_PERF_EVENT")
__failure __msg("tracing progs cannot use bpf_timer yet")
__naked void bpf_prog_type_perf_event_2(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_timer] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
r2 = %[map_timer] ll; \
r3 = 1; \
l0_%=: call %[bpf_timer_init]; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_timer_init),
__imm_addr(map_timer)
: __clobber_all);
}
SEC("tracepoint")
__description("bpf_timer_init is forbidden in BPF_PROG_TYPE_TRACEPOINT")
__failure __msg("tracing progs cannot use bpf_timer yet")
__naked void in_bpf_prog_type_tracepoint_2(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_timer] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
r2 = %[map_timer] ll; \
r3 = 1; \
l0_%=: call %[bpf_timer_init]; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_timer_init),
__imm_addr(map_timer)
: __clobber_all);
}
SEC("raw_tracepoint")
__description("bpf_timer_init is forbidden in BPF_PROG_TYPE_RAW_TRACEPOINT")
__failure __msg("tracing progs cannot use bpf_timer yet")
__naked void bpf_prog_type_raw_tracepoint_2(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_timer] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
r2 = %[map_timer] ll; \
r3 = 1; \
l0_%=: call %[bpf_timer_init]; \
exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_timer_init),
__imm_addr(map_timer)
: __clobber_all);
}
SEC("kprobe")
__description("bpf_spin_lock is forbidden in BPF_PROG_TYPE_KPROBE")
__failure __msg("tracing progs cannot use bpf_spin_lock yet")
__naked void in_bpf_prog_type_kprobe_3(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_spin_lock] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
call %[bpf_spin_lock]; \
l0_%=: exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_spin_lock),
__imm_addr(map_spin_lock)
: __clobber_all);
}
SEC("tracepoint")
__description("bpf_spin_lock is forbidden in BPF_PROG_TYPE_TRACEPOINT")
__failure __msg("tracing progs cannot use bpf_spin_lock yet")
__naked void in_bpf_prog_type_tracepoint_3(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_spin_lock] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
call %[bpf_spin_lock]; \
l0_%=: exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_spin_lock),
__imm_addr(map_spin_lock)
: __clobber_all);
}
SEC("perf_event")
__description("bpf_spin_lock is forbidden in BPF_PROG_TYPE_PERF_EVENT")
__failure __msg("tracing progs cannot use bpf_spin_lock yet")
__naked void bpf_prog_type_perf_event_3(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_spin_lock] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
call %[bpf_spin_lock]; \
l0_%=: exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_spin_lock),
__imm_addr(map_spin_lock)
: __clobber_all);
}
SEC("raw_tracepoint")
__description("bpf_spin_lock is forbidden in BPF_PROG_TYPE_RAW_TRACEPOINT")
__failure __msg("tracing progs cannot use bpf_spin_lock yet")
__naked void bpf_prog_type_raw_tracepoint_3(void)
{
asm volatile (" \
r2 = r10; \
r2 += -8; \
r1 = 0; \
*(u64*)(r2 + 0) = r1; \
r1 = %[map_spin_lock] ll; \
call %[bpf_map_lookup_elem]; \
if r0 == 0 goto l0_%=; \
r1 = r0; \
call %[bpf_spin_lock]; \
l0_%=: exit; \
" :
: __imm(bpf_map_lookup_elem),
__imm(bpf_spin_lock),
__imm_addr(map_spin_lock)
: __clobber_all);
}
char _license[] SEC("license") = "GPL";

196
tools/testing/selftests/bpf/verifier/helper_restricted.c
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@ -1,196 +0,0 @@
{
"bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_KPROBE",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ktime_get_coarse_ns),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr = "unknown func bpf_ktime_get_coarse_ns",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_KPROBE,
},
{
"bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_TRACEPOINT",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ktime_get_coarse_ns),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr = "unknown func bpf_ktime_get_coarse_ns",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
},
{
"bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_PERF_EVENT",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ktime_get_coarse_ns),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr = "unknown func bpf_ktime_get_coarse_ns",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_PERF_EVENT,
},
{
"bpf_ktime_get_coarse_ns is forbidden in BPF_PROG_TYPE_RAW_TRACEPOINT",
.insns = {
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ktime_get_coarse_ns),
BPF_MOV64_IMM(BPF_REG_0, 0),
BPF_EXIT_INSN(),
},
.errstr = "unknown func bpf_ktime_get_coarse_ns",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT,
},
{
"bpf_timer_init isn restricted in BPF_PROG_TYPE_KPROBE",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 4),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_3, 1),
BPF_EMIT_CALL(BPF_FUNC_timer_init),
BPF_EXIT_INSN(),
},
.fixup_map_timer = { 3, 8 },
.errstr = "tracing progs cannot use bpf_timer yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_KPROBE,
},
{
"bpf_timer_init is forbidden in BPF_PROG_TYPE_PERF_EVENT",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 4),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_3, 1),
BPF_EMIT_CALL(BPF_FUNC_timer_init),
BPF_EXIT_INSN(),
},
.fixup_map_timer = { 3, 8 },
.errstr = "tracing progs cannot use bpf_timer yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_PERF_EVENT,
},
{
"bpf_timer_init is forbidden in BPF_PROG_TYPE_TRACEPOINT",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 4),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_3, 1),
BPF_EMIT_CALL(BPF_FUNC_timer_init),
BPF_EXIT_INSN(),
},
.fixup_map_timer = { 3, 8 },
.errstr = "tracing progs cannot use bpf_timer yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
},
{
"bpf_timer_init is forbidden in BPF_PROG_TYPE_RAW_TRACEPOINT",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 4),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_LD_MAP_FD(BPF_REG_2, 0),
BPF_MOV64_IMM(BPF_REG_3, 1),
BPF_EMIT_CALL(BPF_FUNC_timer_init),
BPF_EXIT_INSN(),
},
.fixup_map_timer = { 3, 8 },
.errstr = "tracing progs cannot use bpf_timer yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT,
},
{
"bpf_spin_lock is forbidden in BPF_PROG_TYPE_KPROBE",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 2),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_EMIT_CALL(BPF_FUNC_spin_lock),
BPF_EXIT_INSN(),
},
.fixup_map_spin_lock = { 3 },
.errstr = "tracing progs cannot use bpf_spin_lock yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_KPROBE,
},
{
"bpf_spin_lock is forbidden in BPF_PROG_TYPE_TRACEPOINT",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 2),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_EMIT_CALL(BPF_FUNC_spin_lock),
BPF_EXIT_INSN(),
},
.fixup_map_spin_lock = { 3 },
.errstr = "tracing progs cannot use bpf_spin_lock yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_TRACEPOINT,
},
{
"bpf_spin_lock is forbidden in BPF_PROG_TYPE_PERF_EVENT",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 2),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_EMIT_CALL(BPF_FUNC_spin_lock),
BPF_EXIT_INSN(),
},
.fixup_map_spin_lock = { 3 },
.errstr = "tracing progs cannot use bpf_spin_lock yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_PERF_EVENT,
},
{
"bpf_spin_lock is forbidden in BPF_PROG_TYPE_RAW_TRACEPOINT",
.insns = {
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
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, 2),
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
BPF_EMIT_CALL(BPF_FUNC_spin_lock),
BPF_EXIT_INSN(),
},
.fixup_map_spin_lock = { 3 },
.errstr = "tracing progs cannot use bpf_spin_lock yet",
.result = REJECT,
.prog_type = BPF_PROG_TYPE_RAW_TRACEPOINT,
},