| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Eduard Zingerman | 1158 | 98.81% | 1 | 33.33% |
| Andrei Matei | 14 | 1.19% | 2 | 66.67% |
| Total | 1172 | 3 |
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// 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";
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