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selftests/bpf: verifier/array_access.c converted to inline assembly
Test verifier/array_access.c automatically converted to use inline assembly. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20230325025524.144043-8-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Eduard Zingerman
Alexei Starovoitov
parent
9d0f1568ad
commit
a3c830ae02
@ -4,6 +4,7 @@
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#include "cap_helpers.h"
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#include "verifier_and.skel.h"
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#include "verifier_array_access.skel.h"
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__maybe_unused
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static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_factory)
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@ -30,3 +31,4 @@ static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_fac
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#define RUN(skel) run_tests_aux(#skel, skel##__elf_bytes)
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void test_verifier_and(void) { RUN(verifier_and); }
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void test_verifier_array_access(void) { RUN(verifier_array_access); }
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529
tools/testing/selftests/bpf/progs/verifier_array_access.c
Normal file
529
tools/testing/selftests/bpf/progs/verifier_array_access.c
Normal file
@ -0,0 +1,529 @@
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// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/array_access.c */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#define MAX_ENTRIES 11
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struct test_val {
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unsigned int index;
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int foo[MAX_ENTRIES];
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};
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct test_val);
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__uint(map_flags, BPF_F_RDONLY_PROG);
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} map_array_ro SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct test_val);
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__uint(map_flags, BPF_F_WRONLY_PROG);
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} map_array_wo SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__uint(max_entries, 1);
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__type(key, long long);
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__type(value, struct test_val);
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} map_hash_48b SEC(".maps");
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SEC("socket")
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__description("valid map access into an array with a constant")
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__success __failure_unpriv __msg_unpriv("R0 leaks addr")
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__retval(0)
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__naked void an_array_with_a_constant_1(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("valid map access into an array with a register")
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__success __failure_unpriv __msg_unpriv("R0 leaks addr")
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__retval(0) __flag(BPF_F_ANY_ALIGNMENT)
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__naked void an_array_with_a_register_1(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = 4; \
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r1 <<= 2; \
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r0 += r1; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("valid map access into an array with a variable")
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__success __failure_unpriv __msg_unpriv("R0 leaks addr")
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__retval(0) __flag(BPF_F_ANY_ALIGNMENT)
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__naked void an_array_with_a_variable_1(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = *(u32*)(r0 + 0); \
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if r1 >= %[max_entries] goto l0_%=; \
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r1 <<= 2; \
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r0 += r1; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(max_entries, MAX_ENTRIES),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("valid map access into an array with a signed variable")
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__success __failure_unpriv __msg_unpriv("R0 leaks addr")
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__retval(0) __flag(BPF_F_ANY_ALIGNMENT)
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__naked void array_with_a_signed_variable(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = *(u32*)(r0 + 0); \
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if w1 s> 0xffffffff goto l1_%=; \
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w1 = 0; \
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l1_%=: w2 = %[max_entries]; \
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if r2 s> r1 goto l2_%=; \
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w1 = 0; \
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l2_%=: w1 <<= 2; \
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r0 += r1; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(max_entries, MAX_ENTRIES),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid map access into an array with a constant")
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__failure __msg("invalid access to map value, value_size=48 off=48 size=8")
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__failure_unpriv
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__naked void an_array_with_a_constant_2(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + %[__imm_0]) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(__imm_0, (MAX_ENTRIES + 1) << 2),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid map access into an array with a register")
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__failure __msg("R0 min value is outside of the allowed memory range")
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__failure_unpriv
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void an_array_with_a_register_2(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = %[__imm_0]; \
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r1 <<= 2; \
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r0 += r1; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(__imm_0, MAX_ENTRIES + 1),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid map access into an array with a variable")
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__failure
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__msg("R0 unbounded memory access, make sure to bounds check any such access")
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__failure_unpriv
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void an_array_with_a_variable_2(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = *(u32*)(r0 + 0); \
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r1 <<= 2; \
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r0 += r1; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid map access into an array with no floor check")
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__failure __msg("R0 unbounded memory access")
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__failure_unpriv __msg_unpriv("R0 leaks addr")
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void array_with_no_floor_check(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = *(u64*)(r0 + 0); \
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w2 = %[max_entries]; \
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if r2 s> r1 goto l1_%=; \
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w1 = 0; \
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l1_%=: w1 <<= 2; \
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r0 += r1; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(max_entries, MAX_ENTRIES),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid map access into an array with a invalid max check")
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__failure __msg("invalid access to map value, value_size=48 off=44 size=8")
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__failure_unpriv __msg_unpriv("R0 leaks addr")
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void with_a_invalid_max_check_1(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = *(u32*)(r0 + 0); \
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w2 = %[__imm_0]; \
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if r2 > r1 goto l1_%=; \
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w1 = 0; \
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l1_%=: w1 <<= 2; \
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r0 += r1; \
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r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(__imm_0, MAX_ENTRIES + 1),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid map access into an array with a invalid max check")
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__failure __msg("R0 pointer += pointer")
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__failure_unpriv
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void with_a_invalid_max_check_2(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r8 = r0; \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r0 += r8; \
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r0 = *(u32*)(r0 + %[test_val_foo]); \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("valid read map access into a read-only array 1")
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__success __success_unpriv __retval(28)
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__naked void a_read_only_array_1_1(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_array_ro] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r0 = *(u32*)(r0 + 0); \
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l0_%=: exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_array_ro)
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: __clobber_all);
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}
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SEC("tc")
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__description("valid read map access into a read-only array 2")
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__success __retval(65507)
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__naked void a_read_only_array_2_1(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_array_ro] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = r0; \
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r2 = 4; \
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r3 = 0; \
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r4 = 0; \
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r5 = 0; \
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call %[bpf_csum_diff]; \
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l0_%=: r0 &= 0xffff; \
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exit; \
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" :
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: __imm(bpf_csum_diff),
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__imm(bpf_map_lookup_elem),
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__imm_addr(map_array_ro)
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid write map access into a read-only array 1")
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__failure __msg("write into map forbidden")
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__failure_unpriv
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__naked void a_read_only_array_1_2(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_array_ro] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = 42; \
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*(u64*)(r0 + 0) = r1; \
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l0_%=: exit; \
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" :
|
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_array_ro)
|
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: __clobber_all);
|
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}
|
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|
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SEC("tc")
|
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__description("invalid write map access into a read-only array 2")
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__failure __msg("write into map forbidden")
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__naked void a_read_only_array_2_2(void)
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{
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asm volatile (" \
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r6 = r1; \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
|
||||
r2 += -8; \
|
||||
r1 = %[map_array_ro] ll; \
|
||||
call %[bpf_map_lookup_elem]; \
|
||||
if r0 == 0 goto l0_%=; \
|
||||
r1 = r6; \
|
||||
r2 = 0; \
|
||||
r3 = r0; \
|
||||
r4 = 8; \
|
||||
call %[bpf_skb_load_bytes]; \
|
||||
l0_%=: exit; \
|
||||
" :
|
||||
: __imm(bpf_map_lookup_elem),
|
||||
__imm(bpf_skb_load_bytes),
|
||||
__imm_addr(map_array_ro)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("valid write map access into a write-only array 1")
|
||||
__success __success_unpriv __retval(1)
|
||||
__naked void a_write_only_array_1_1(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r1 = 0; \
|
||||
*(u64*)(r10 - 8) = r1; \
|
||||
r2 = r10; \
|
||||
r2 += -8; \
|
||||
r1 = %[map_array_wo] ll; \
|
||||
call %[bpf_map_lookup_elem]; \
|
||||
if r0 == 0 goto l0_%=; \
|
||||
r1 = 42; \
|
||||
*(u64*)(r0 + 0) = r1; \
|
||||
l0_%=: r0 = 1; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm(bpf_map_lookup_elem),
|
||||
__imm_addr(map_array_wo)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("tc")
|
||||
__description("valid write map access into a write-only array 2")
|
||||
__success __retval(0)
|
||||
__naked void a_write_only_array_2_1(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r6 = r1; \
|
||||
r1 = 0; \
|
||||
*(u64*)(r10 - 8) = r1; \
|
||||
r2 = r10; \
|
||||
r2 += -8; \
|
||||
r1 = %[map_array_wo] ll; \
|
||||
call %[bpf_map_lookup_elem]; \
|
||||
if r0 == 0 goto l0_%=; \
|
||||
r1 = r6; \
|
||||
r2 = 0; \
|
||||
r3 = r0; \
|
||||
r4 = 8; \
|
||||
call %[bpf_skb_load_bytes]; \
|
||||
l0_%=: exit; \
|
||||
" :
|
||||
: __imm(bpf_map_lookup_elem),
|
||||
__imm(bpf_skb_load_bytes),
|
||||
__imm_addr(map_array_wo)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("socket")
|
||||
__description("invalid read map access into a write-only array 1")
|
||||
__failure __msg("read from map forbidden")
|
||||
__failure_unpriv
|
||||
__naked void a_write_only_array_1_2(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r1 = 0; \
|
||||
*(u64*)(r10 - 8) = r1; \
|
||||
r2 = r10; \
|
||||
r2 += -8; \
|
||||
r1 = %[map_array_wo] ll; \
|
||||
call %[bpf_map_lookup_elem]; \
|
||||
if r0 == 0 goto l0_%=; \
|
||||
r0 = *(u64*)(r0 + 0); \
|
||||
l0_%=: exit; \
|
||||
" :
|
||||
: __imm(bpf_map_lookup_elem),
|
||||
__imm_addr(map_array_wo)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
SEC("tc")
|
||||
__description("invalid read map access into a write-only array 2")
|
||||
__failure __msg("read from map forbidden")
|
||||
__naked void a_write_only_array_2_2(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
r1 = 0; \
|
||||
*(u64*)(r10 - 8) = r1; \
|
||||
r2 = r10; \
|
||||
r2 += -8; \
|
||||
r1 = %[map_array_wo] ll; \
|
||||
call %[bpf_map_lookup_elem]; \
|
||||
if r0 == 0 goto l0_%=; \
|
||||
r1 = r0; \
|
||||
r2 = 4; \
|
||||
r3 = 0; \
|
||||
r4 = 0; \
|
||||
r5 = 0; \
|
||||
call %[bpf_csum_diff]; \
|
||||
l0_%=: exit; \
|
||||
" :
|
||||
: __imm(bpf_csum_diff),
|
||||
__imm(bpf_map_lookup_elem),
|
||||
__imm_addr(map_array_wo)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
char _license[] SEC("license") = "GPL";
|
||||
@ -1,379 +0,0 @@
|
||||
{
|
||||
"valid map access into an array with a constant",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"valid map access into an array with a register",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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_IMM(BPF_REG_1, 4),
|
||||
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 2),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"valid map access into an array with a variable",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 5),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_JMP_IMM(BPF_JGE, BPF_REG_1, MAX_ENTRIES, 3),
|
||||
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 2),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"valid map access into an array with a signed variable",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 9),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_JMP32_IMM(BPF_JSGT, BPF_REG_1, 0xffffffff, 1),
|
||||
BPF_MOV32_IMM(BPF_REG_1, 0),
|
||||
BPF_MOV32_IMM(BPF_REG_2, MAX_ENTRIES),
|
||||
BPF_JMP_REG(BPF_JSGT, BPF_REG_2, BPF_REG_1, 1),
|
||||
BPF_MOV32_IMM(BPF_REG_1, 0),
|
||||
BPF_ALU32_IMM(BPF_LSH, BPF_REG_1, 2),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"invalid map access into an array with a constant",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, (MAX_ENTRIES + 1) << 2,
|
||||
offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr = "invalid access to map value, value_size=48 off=48 size=8",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"invalid map access into an array with a register",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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_IMM(BPF_REG_1, MAX_ENTRIES + 1),
|
||||
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 2),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr = "R0 min value is outside of the allowed memory range",
|
||||
.result = REJECT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"invalid map access into an array with a variable",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 2),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr = "R0 unbounded memory access, make sure to bounds check any such access",
|
||||
.result = REJECT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"invalid map access into an array with no floor check",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 7),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_MOV32_IMM(BPF_REG_2, MAX_ENTRIES),
|
||||
BPF_JMP_REG(BPF_JSGT, BPF_REG_2, BPF_REG_1, 1),
|
||||
BPF_MOV32_IMM(BPF_REG_1, 0),
|
||||
BPF_ALU32_IMM(BPF_LSH, BPF_REG_1, 2),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.errstr = "R0 unbounded memory access",
|
||||
.result_unpriv = REJECT,
|
||||
.result = REJECT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"invalid map access into an array with a invalid max check",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 7),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_0, 0),
|
||||
BPF_MOV32_IMM(BPF_REG_2, MAX_ENTRIES + 1),
|
||||
BPF_JMP_REG(BPF_JGT, BPF_REG_2, BPF_REG_1, 1),
|
||||
BPF_MOV32_IMM(BPF_REG_1, 0),
|
||||
BPF_ALU32_IMM(BPF_LSH, BPF_REG_1, 2),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3 },
|
||||
.errstr_unpriv = "R0 leaks addr",
|
||||
.errstr = "invalid access to map value, value_size=48 off=44 size=8",
|
||||
.result_unpriv = REJECT,
|
||||
.result = REJECT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"invalid map access into an array with a invalid max check",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 10),
|
||||
BPF_MOV64_REG(BPF_REG_8, BPF_REG_0),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_8),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,
|
||||
offsetof(struct test_val, foo)),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_hash_48b = { 3, 11 },
|
||||
.errstr = "R0 pointer += pointer",
|
||||
.result = REJECT,
|
||||
.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
|
||||
},
|
||||
{
|
||||
"valid read map access into a read-only array 1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 1),
|
||||
BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_array_ro = { 3 },
|
||||
.result = ACCEPT,
|
||||
.retval = 28,
|
||||
},
|
||||
{
|
||||
"valid read map access into a read-only array 2",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 6),
|
||||
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
|
||||
BPF_MOV64_IMM(BPF_REG_2, 4),
|
||||
BPF_MOV64_IMM(BPF_REG_3, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_4, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_5, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_csum_diff),
|
||||
BPF_ALU64_IMM(BPF_AND, BPF_REG_0, 0xffff),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map_array_ro = { 3 },
|
||||
.result = ACCEPT,
|
||||
.retval = 65507,
|
||||
},
|
||||
{
|
||||
"invalid write map access into a read-only array 1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 42),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_array_ro = { 3 },
|
||||
.result = REJECT,
|
||||
.errstr = "write into map forbidden",
|
||||
},
|
||||
{
|
||||
"invalid write map access into a read-only array 2",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 5),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_MOV64_IMM(BPF_REG_2, 0),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
|
||||
BPF_MOV64_IMM(BPF_REG_4, 8),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_skb_load_bytes),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map_array_ro = { 4 },
|
||||
.result = REJECT,
|
||||
.errstr = "write into map forbidden",
|
||||
},
|
||||
{
|
||||
"valid write map access into a write-only array 1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_0, 0, 42),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_array_wo = { 3 },
|
||||
.result = ACCEPT,
|
||||
.retval = 1,
|
||||
},
|
||||
{
|
||||
"valid write map access into a write-only array 2",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 5),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_6),
|
||||
BPF_MOV64_IMM(BPF_REG_2, 0),
|
||||
BPF_MOV64_REG(BPF_REG_3, BPF_REG_0),
|
||||
BPF_MOV64_IMM(BPF_REG_4, 8),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_skb_load_bytes),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map_array_wo = { 4 },
|
||||
.result = ACCEPT,
|
||||
.retval = 0,
|
||||
},
|
||||
{
|
||||
"invalid read map access into a write-only array 1",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 1),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_array_wo = { 3 },
|
||||
.result = REJECT,
|
||||
.errstr = "read from map forbidden",
|
||||
},
|
||||
{
|
||||
"invalid read map access into a write-only array 2",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
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, 6),
|
||||
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
|
||||
BPF_MOV64_IMM(BPF_REG_2, 4),
|
||||
BPF_MOV64_IMM(BPF_REG_3, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_4, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_5, 0),
|
||||
BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0,
|
||||
BPF_FUNC_csum_diff),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
.fixup_map_array_wo = { 3 },
|
||||
.result = REJECT,
|
||||
.errstr = "read from map forbidden",
|
||||
},
|
||||
Loading…
Reference in New Issue
Block a user