diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/verifier_helper_value_access.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_helper_value_access.c | 1282 |
1 files changed, 1282 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_helper_value_access.c b/tools/testing/selftests/bpf/progs/verifier_helper_value_access.c new file mode 100644 index 000000000000..886498b5e6f3 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/verifier_helper_value_access.c @@ -0,0 +1,1282 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Converted from tools/testing/selftests/bpf/verifier/helper_value_access.c */ + +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> +#include "bpf_misc.h" + +struct other_val { + long long foo; + long long bar; +}; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __uint(max_entries, 1); + __type(key, long long); + __type(value, struct other_val); +} map_hash_16b SEC(".maps"); + +#define MAX_ENTRIES 11 + +struct test_val { + unsigned int index; + int foo[MAX_ENTRIES]; +}; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __uint(max_entries, 1); + __type(key, long long); + __type(value, struct test_val); +} map_hash_48b SEC(".maps"); + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __uint(max_entries, 1); + __type(key, long long); + __type(value, long long); +} map_hash_8b SEC(".maps"); + +SEC("tracepoint") +__description("helper access to map: full range") +__success +__naked void access_to_map_full_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r2 = %[sizeof_test_val]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(sizeof_test_val, sizeof(struct test_val)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: partial range") +__success +__naked void access_to_map_partial_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r2 = 8; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +/* Call a function taking a pointer and a size which doesn't allow the size to + * be zero (i.e. bpf_trace_printk() declares the second argument to be + * ARG_CONST_SIZE, not ARG_CONST_SIZE_OR_ZERO). We attempt to pass zero for the + * size and expect to fail. + */ +SEC("tracepoint") +__description("helper access to map: empty range") +__failure __msg("R2 invalid zero-sized read: u64=[0,0]") +__naked void access_to_map_empty_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r2 = 0; \ + call %[bpf_trace_printk]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_trace_printk), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +/* Like the test above, but this time the size register is not known to be zero; + * its lower-bound is zero though, which is still unacceptable. + */ +SEC("tracepoint") +__description("helper access to map: possibly-empty ange") +__failure __msg("R2 invalid zero-sized read: u64=[0,4]") +__naked void access_to_map_possibly_empty_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + /* Read an unknown value */ \ + r7 = *(u64*)(r0 + 0); \ + /* Make it small and positive, to avoid other errors */ \ + r7 &= 4; \ + r2 = 0; \ + r2 += r7; \ + call %[bpf_trace_printk]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_trace_printk), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: out-of-bound range") +__failure __msg("invalid access to map value, value_size=48 off=0 size=56") +__naked void map_out_of_bound_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r2 = %[__imm_0]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(__imm_0, sizeof(struct test_val) + 8) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: negative range") +__failure __msg("R2 min value is negative") +__naked void access_to_map_negative_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r2 = -8; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const imm): full range") +__success +__naked void via_const_imm_full_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r1 += %[test_val_foo]; \ + r2 = %[__imm_0]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(__imm_0, sizeof(struct test_val) - offsetof(struct test_val, foo)), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const imm): partial range") +__success +__naked void via_const_imm_partial_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r1 += %[test_val_foo]; \ + r2 = 8; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const imm): empty range") +__failure __msg("R2 invalid zero-sized read") +__naked void via_const_imm_empty_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r1 += %[test_val_foo]; \ + r2 = 0; \ + call %[bpf_trace_printk]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_trace_printk), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const imm): out-of-bound range") +__failure __msg("invalid access to map value, value_size=48 off=4 size=52") +__naked void imm_out_of_bound_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r1 += %[test_val_foo]; \ + r2 = %[__imm_0]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(__imm_0, sizeof(struct test_val) - offsetof(struct test_val, foo) + 8), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const imm): negative range (> adjustment)") +__failure __msg("R2 min value is negative") +__naked void const_imm_negative_range_adjustment_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r1 += %[test_val_foo]; \ + r2 = -8; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const imm): negative range (< adjustment)") +__failure __msg("R2 min value is negative") +__naked void const_imm_negative_range_adjustment_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r1 += %[test_val_foo]; \ + r2 = -1; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const reg): full range") +__success +__naked void via_const_reg_full_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = %[test_val_foo]; \ + r1 += r3; \ + r2 = %[__imm_0]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(__imm_0, sizeof(struct test_val) - offsetof(struct test_val, foo)), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const reg): partial range") +__success +__naked void via_const_reg_partial_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = %[test_val_foo]; \ + r1 += r3; \ + r2 = 8; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const reg): empty range") +__failure __msg("R2 invalid zero-sized read") +__naked void via_const_reg_empty_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = 0; \ + r1 += r3; \ + r2 = 0; \ + call %[bpf_trace_printk]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_trace_printk), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const reg): out-of-bound range") +__failure __msg("invalid access to map value, value_size=48 off=4 size=52") +__naked void reg_out_of_bound_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = %[test_val_foo]; \ + r1 += r3; \ + r2 = %[__imm_0]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(__imm_0, sizeof(struct test_val) - offsetof(struct test_val, foo) + 8), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const reg): negative range (> adjustment)") +__failure __msg("R2 min value is negative") +__naked void const_reg_negative_range_adjustment_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = %[test_val_foo]; \ + r1 += r3; \ + r2 = -8; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via const reg): negative range (< adjustment)") +__failure __msg("R2 min value is negative") +__naked void const_reg_negative_range_adjustment_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = %[test_val_foo]; \ + r1 += r3; \ + r2 = -1; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via variable): full range") +__success +__naked void map_via_variable_full_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 > %[test_val_foo] goto l0_%=; \ + r1 += r3; \ + r2 = %[__imm_0]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(__imm_0, sizeof(struct test_val) - offsetof(struct test_val, foo)), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via variable): partial range") +__success +__naked void map_via_variable_partial_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 > %[test_val_foo] goto l0_%=; \ + r1 += r3; \ + r2 = 8; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via variable): empty range") +__failure __msg("R2 invalid zero-sized read") +__naked void map_via_variable_empty_range(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 > %[test_val_foo] goto l0_%=; \ + r1 += r3; \ + r2 = 0; \ + call %[bpf_trace_printk]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_trace_printk), + __imm_addr(map_hash_48b), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via variable): no max check") +__failure __msg("R1 unbounded memory access") +__naked void via_variable_no_max_check_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + r1 += r3; \ + r2 = 1; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to adjusted map (via variable): wrong max check") +__failure __msg("invalid access to map value, value_size=48 off=4 size=45") +__naked void via_variable_wrong_max_check_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 > %[test_val_foo] goto l0_%=; \ + r1 += r3; \ + r2 = %[__imm_0]; \ + r3 = 0; \ + call %[bpf_probe_read_kernel]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_probe_read_kernel), + __imm_addr(map_hash_48b), + __imm_const(__imm_0, sizeof(struct test_val) - offsetof(struct test_val, foo) + 1), + __imm_const(test_val_foo, offsetof(struct test_val, foo)) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using <, good access") +__success +__naked void bounds_check_using_good_access_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 < 32 goto l1_%=; \ + r0 = 0; \ +l0_%=: exit; \ +l1_%=: r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using <, bad access") +__failure __msg("R1 unbounded memory access") +__naked void bounds_check_using_bad_access_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 < 32 goto l1_%=; \ + r1 += r3; \ +l0_%=: r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +l1_%=: r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using <=, good access") +__success +__naked void bounds_check_using_good_access_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 <= 32 goto l1_%=; \ + r0 = 0; \ +l0_%=: exit; \ +l1_%=: r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using <=, bad access") +__failure __msg("R1 unbounded memory access") +__naked void bounds_check_using_bad_access_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 <= 32 goto l1_%=; \ + r1 += r3; \ +l0_%=: r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +l1_%=: r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using s<, good access") +__success +__naked void check_using_s_good_access_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 s< 32 goto l1_%=; \ +l2_%=: r0 = 0; \ +l0_%=: exit; \ +l1_%=: if r3 s< 0 goto l2_%=; \ + r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using s<, good access 2") +__success +__naked void using_s_good_access_2_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 s< 32 goto l1_%=; \ +l2_%=: r0 = 0; \ +l0_%=: exit; \ +l1_%=: if r3 s< -3 goto l2_%=; \ + r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using s<, bad access") +__failure __msg("R1 min value is negative") +__naked void check_using_s_bad_access_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u64*)(r0 + 0); \ + if r3 s< 32 goto l1_%=; \ +l2_%=: r0 = 0; \ +l0_%=: exit; \ +l1_%=: if r3 s< -3 goto l2_%=; \ + r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using s<=, good access") +__success +__naked void check_using_s_good_access_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 s<= 32 goto l1_%=; \ +l2_%=: r0 = 0; \ +l0_%=: exit; \ +l1_%=: if r3 s<= 0 goto l2_%=; \ + r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using s<=, good access 2") +__success +__naked void using_s_good_access_2_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 s<= 32 goto l1_%=; \ +l2_%=: r0 = 0; \ +l0_%=: exit; \ +l1_%=: if r3 s<= -3 goto l2_%=; \ + r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("helper access to map: bounds check using s<=, bad access") +__failure __msg("R1 min value is negative") +__naked void check_using_s_bad_access_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_48b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r1 = r0; \ + r3 = *(u64*)(r0 + 0); \ + if r3 s<= 32 goto l1_%=; \ +l2_%=: r0 = 0; \ +l0_%=: exit; \ +l1_%=: if r3 s<= -3 goto l2_%=; \ + r1 += r3; \ + r0 = 0; \ + *(u8*)(r1 + 0) = r0; \ + r0 = 0; \ + exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_48b) + : __clobber_all); +} + +SEC("tracepoint") +__description("map lookup helper access to map") +__success +__naked void lookup_helper_access_to_map(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b) + : __clobber_all); +} + +SEC("tracepoint") +__description("map update helper access to map") +__success +__naked void update_helper_access_to_map(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r4 = 0; \ + r3 = r0; \ + r2 = r0; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_update_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_map_update_elem), + __imm_addr(map_hash_16b) + : __clobber_all); +} + +SEC("tracepoint") +__description("map update helper access to map: wrong size") +__failure __msg("invalid access to map value, value_size=8 off=0 size=16") +__naked void access_to_map_wrong_size(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_8b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r4 = 0; \ + r3 = r0; \ + r2 = r0; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_update_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm(bpf_map_update_elem), + __imm_addr(map_hash_16b), + __imm_addr(map_hash_8b) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via const imm)") +__success +__naked void adjusted_map_via_const_imm(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r2 += %[other_val_bar]; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b), + __imm_const(other_val_bar, offsetof(struct other_val, bar)) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via const imm): out-of-bound 1") +__failure __msg("invalid access to map value, value_size=16 off=12 size=8") +__naked void imm_out_of_bound_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r2 += %[__imm_0]; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b), + __imm_const(__imm_0, sizeof(struct other_val) - 4) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via const imm): out-of-bound 2") +__failure __msg("invalid access to map value, value_size=16 off=-4 size=8") +__naked void imm_out_of_bound_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r2 += -4; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via const reg)") +__success +__naked void adjusted_map_via_const_reg(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r3 = %[other_val_bar]; \ + r2 += r3; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b), + __imm_const(other_val_bar, offsetof(struct other_val, bar)) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via const reg): out-of-bound 1") +__failure __msg("invalid access to map value, value_size=16 off=12 size=8") +__naked void reg_out_of_bound_1(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r3 = %[__imm_0]; \ + r2 += r3; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b), + __imm_const(__imm_0, sizeof(struct other_val) - 4) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via const reg): out-of-bound 2") +__failure __msg("invalid access to map value, value_size=16 off=-4 size=8") +__naked void reg_out_of_bound_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r3 = -4; \ + r2 += r3; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via variable)") +__success +__naked void to_adjusted_map_via_variable(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 > %[other_val_bar] goto l0_%=; \ + r2 += r3; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b), + __imm_const(other_val_bar, offsetof(struct other_val, bar)) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via variable): no max check") +__failure +__msg("R2 unbounded memory access, make sure to bounds check any such access") +__naked void via_variable_no_max_check_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r3 = *(u32*)(r0 + 0); \ + r2 += r3; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b) + : __clobber_all); +} + +SEC("tracepoint") +__description("map helper access to adjusted map (via variable): wrong max check") +__failure __msg("invalid access to map value, value_size=16 off=9 size=8") +__naked void via_variable_wrong_max_check_2(void) +{ + asm volatile (" \ + r2 = r10; \ + r2 += -8; \ + r1 = 0; \ + *(u64*)(r2 + 0) = r1; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ + if r0 == 0 goto l0_%=; \ + r2 = r0; \ + r3 = *(u32*)(r0 + 0); \ + if r3 > %[__imm_0] goto l0_%=; \ + r2 += r3; \ + r1 = %[map_hash_16b] ll; \ + call %[bpf_map_lookup_elem]; \ +l0_%=: exit; \ +" : + : __imm(bpf_map_lookup_elem), + __imm_addr(map_hash_16b), + __imm_const(__imm_0, offsetof(struct other_val, bar) + 1) + : __clobber_all); +} + +char _license[] SEC("license") = "GPL"; |