| // SPDX-License-Identifier: GPL-2.0 |
| /* Converted from tools/testing/selftests/bpf/verifier/value_ptr_arith.c */ |
| |
| #include <linux/bpf.h> |
| #include <bpf/bpf_helpers.h> |
| #include <errno.h> |
| #include "bpf_misc.h" |
| |
| #define MAX_ENTRIES 11 |
| |
| struct test_val { |
| unsigned int index; |
| int foo[MAX_ENTRIES]; |
| }; |
| |
| struct { |
| __uint(type, BPF_MAP_TYPE_ARRAY); |
| __uint(max_entries, 1); |
| __type(key, int); |
| __type(value, struct test_val); |
| } map_array_48b SEC(".maps"); |
| |
| 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"); |
| |
| 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"); |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr unknown vs const") |
| __success __failure_unpriv |
| __msg_unpriv("R1 tried to add from different maps, paths or scalars") |
| __retval(1) |
| __naked void value_ptr_unknown_vs_const(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r4 = *(u8*)(r0 + 0); \ |
| if r4 == 1 goto l3_%=; \ |
| r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x7; \ |
| goto l4_%=; \ |
| l3_%=: r1 = 3; \ |
| l4_%=: r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr const vs unknown") |
| __success __failure_unpriv |
| __msg_unpriv("R1 tried to add from different maps, paths or scalars") |
| __retval(1) |
| __naked void value_ptr_const_vs_unknown(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r4 = *(u8*)(r0 + 0); \ |
| if r4 == 1 goto l3_%=; \ |
| r1 = 3; \ |
| goto l4_%=; \ |
| l3_%=: r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x7; \ |
| l4_%=: r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr const vs const (ne)") |
| __success __failure_unpriv |
| __msg_unpriv("R1 tried to add from different maps, paths or scalars") |
| __retval(1) |
| __naked void ptr_const_vs_const_ne(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r4 = *(u8*)(r0 + 0); \ |
| if r4 == 1 goto l3_%=; \ |
| r1 = 3; \ |
| goto l4_%=; \ |
| l3_%=: r1 = 5; \ |
| l4_%=: r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr const vs const (eq)") |
| __success __success_unpriv __retval(1) |
| __naked void ptr_const_vs_const_eq(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r4 = *(u8*)(r0 + 0); \ |
| if r4 == 1 goto l3_%=; \ |
| r1 = 5; \ |
| goto l4_%=; \ |
| l3_%=: r1 = 5; \ |
| l4_%=: r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr unknown vs unknown (eq)") |
| __success __success_unpriv __retval(1) |
| __naked void ptr_unknown_vs_unknown_eq(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r4 = *(u8*)(r0 + 0); \ |
| if r4 == 1 goto l3_%=; \ |
| r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x7; \ |
| goto l4_%=; \ |
| l3_%=: r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x7; \ |
| l4_%=: r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr unknown vs unknown (lt)") |
| __success __failure_unpriv |
| __msg_unpriv("R1 tried to add from different maps, paths or scalars") |
| __retval(1) |
| __naked void ptr_unknown_vs_unknown_lt(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r4 = *(u8*)(r0 + 0); \ |
| if r4 == 1 goto l3_%=; \ |
| r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x3; \ |
| goto l4_%=; \ |
| l3_%=: r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x7; \ |
| l4_%=: r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr unknown vs unknown (gt)") |
| __success __failure_unpriv |
| __msg_unpriv("R1 tried to add from different maps, paths or scalars") |
| __retval(1) |
| __naked void ptr_unknown_vs_unknown_gt(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r4 = *(u8*)(r0 + 0); \ |
| if r4 == 1 goto l3_%=; \ |
| r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x7; \ |
| goto l4_%=; \ |
| l3_%=: r1 = 6; \ |
| r1 = -r1; \ |
| r1 &= 0x3; \ |
| l4_%=: r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr from different maps") |
| __success __success_unpriv __retval(1) |
| __naked void value_ptr_from_different_maps(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r1 = 4; \ |
| r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= known scalar from different maps") |
| __success __failure_unpriv |
| __msg_unpriv("R0 min value is outside of the allowed memory range") |
| __retval(1) |
| __naked void known_scalar_from_different_maps(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_16b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r1 = 4; \ |
| r0 -= r1; \ |
| r0 += r1; \ |
| r0 = *(u8*)(r0 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_16b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr from different maps, but same value properties") |
| __success __success_unpriv __retval(1) |
| __naked void maps_but_same_value_properties(void) |
| { |
| asm volatile (" \ |
| r0 = *(u32*)(r1 + %[__sk_buff_len]); \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| if r0 == 1 goto l0_%=; \ |
| r1 = %[map_hash_48b] ll; \ |
| if r0 != 1 goto l1_%=; \ |
| l0_%=: r1 = %[map_array_48b] ll; \ |
| l1_%=: call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l2_%=; \ |
| r1 = 4; \ |
| r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l2_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_addr(map_hash_48b), |
| __imm_const(__sk_buff_len, offsetof(struct __sk_buff, len)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: mixing value pointer and scalar, 1") |
| __success __failure_unpriv __msg_unpriv("R2 pointer comparison prohibited") |
| __retval(0) |
| __naked void value_pointer_and_scalar_1(void) |
| { |
| asm volatile (" \ |
| /* load map value pointer into r0 and r2 */ \ |
| r0 = 1; \ |
| r1 = %[map_array_48b] ll; \ |
| r2 = r10; \ |
| r2 += -16; \ |
| r6 = 0; \ |
| *(u64*)(r10 - 16) = r6; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 != 0 goto l0_%=; \ |
| exit; \ |
| l0_%=: /* load some number from the map into r1 */ \ |
| r1 = *(u8*)(r0 + 0); \ |
| /* depending on r1, branch: */ \ |
| if r1 != 0 goto l1_%=; \ |
| /* branch A */ \ |
| r2 = r0; \ |
| r3 = 0; \ |
| goto l2_%=; \ |
| l1_%=: /* branch B */ \ |
| r2 = 0; \ |
| r3 = 0x100000; \ |
| l2_%=: /* common instruction */ \ |
| r2 += r3; \ |
| /* depending on r1, branch: */ \ |
| if r1 != 0 goto l3_%=; \ |
| /* branch A */ \ |
| goto l4_%=; \ |
| l3_%=: /* branch B */ \ |
| r0 = 0x13371337; \ |
| /* verifier follows fall-through */ \ |
| if r2 != 0x100000 goto l4_%=; \ |
| r0 = 0; \ |
| exit; \ |
| l4_%=: /* fake-dead code; targeted from branch A to \ |
| * prevent dead code sanitization \ |
| */ \ |
| r0 = *(u8*)(r0 + 0); \ |
| r0 = 0; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: mixing value pointer and scalar, 2") |
| __success __failure_unpriv __msg_unpriv("R0 invalid mem access 'scalar'") |
| __retval(0) |
| __naked void value_pointer_and_scalar_2(void) |
| { |
| asm volatile (" \ |
| /* load map value pointer into r0 and r2 */ \ |
| r0 = 1; \ |
| r1 = %[map_array_48b] ll; \ |
| r2 = r10; \ |
| r2 += -16; \ |
| r6 = 0; \ |
| *(u64*)(r10 - 16) = r6; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 != 0 goto l0_%=; \ |
| exit; \ |
| l0_%=: /* load some number from the map into r1 */ \ |
| r1 = *(u8*)(r0 + 0); \ |
| /* depending on r1, branch: */ \ |
| if r1 == 0 goto l1_%=; \ |
| /* branch A */ \ |
| r2 = 0; \ |
| r3 = 0x100000; \ |
| goto l2_%=; \ |
| l1_%=: /* branch B */ \ |
| r2 = r0; \ |
| r3 = 0; \ |
| l2_%=: /* common instruction */ \ |
| r2 += r3; \ |
| /* depending on r1, branch: */ \ |
| if r1 != 0 goto l3_%=; \ |
| /* branch A */ \ |
| goto l4_%=; \ |
| l3_%=: /* branch B */ \ |
| r0 = 0x13371337; \ |
| /* verifier follows fall-through */ \ |
| if r2 != 0x100000 goto l4_%=; \ |
| r0 = 0; \ |
| exit; \ |
| l4_%=: /* fake-dead code; targeted from branch A to \ |
| * prevent dead code sanitization, rejected \ |
| * via branch B however \ |
| */ \ |
| r0 = *(u8*)(r0 + 0); \ |
| r0 = 0; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("sanitation: alu with different scalars 1") |
| __success __success_unpriv __retval(0x100000) |
| __naked void alu_with_different_scalars_1(void) |
| { |
| asm volatile (" \ |
| r0 = 1; \ |
| r1 = %[map_array_48b] ll; \ |
| r2 = r10; \ |
| r2 += -16; \ |
| r6 = 0; \ |
| *(u64*)(r10 - 16) = r6; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 != 0 goto l0_%=; \ |
| exit; \ |
| l0_%=: r1 = *(u32*)(r0 + 0); \ |
| if r1 == 0 goto l1_%=; \ |
| r2 = 0; \ |
| r3 = 0x100000; \ |
| goto l2_%=; \ |
| l1_%=: r2 = 42; \ |
| r3 = 0x100001; \ |
| l2_%=: r2 += r3; \ |
| r0 = r2; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("sanitation: alu with different scalars 2") |
| __success __success_unpriv __retval(0) |
| __naked void alu_with_different_scalars_2(void) |
| { |
| asm volatile (" \ |
| r0 = 1; \ |
| r1 = %[map_array_48b] ll; \ |
| r6 = r1; \ |
| r2 = r10; \ |
| r2 += -16; \ |
| r7 = 0; \ |
| *(u64*)(r10 - 16) = r7; \ |
| call %[bpf_map_delete_elem]; \ |
| r7 = r0; \ |
| r1 = r6; \ |
| r2 = r10; \ |
| r2 += -16; \ |
| call %[bpf_map_delete_elem]; \ |
| r6 = r0; \ |
| r8 = r6; \ |
| r8 += r7; \ |
| r0 = r8; \ |
| r0 += %[einval]; \ |
| r0 += %[einval]; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_delete_elem), |
| __imm_addr(map_array_48b), |
| __imm_const(einval, EINVAL) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("sanitation: alu with different scalars 3") |
| __success __success_unpriv __retval(0) |
| __naked void alu_with_different_scalars_3(void) |
| { |
| asm volatile (" \ |
| r0 = %[einval]; \ |
| r0 *= -1; \ |
| r7 = r0; \ |
| r0 = %[einval]; \ |
| r0 *= -1; \ |
| r6 = r0; \ |
| r8 = r6; \ |
| r8 += r7; \ |
| r0 = r8; \ |
| r0 += %[einval]; \ |
| r0 += %[einval]; \ |
| exit; \ |
| " : |
| : __imm_const(einval, EINVAL) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, upper oob arith, test 1") |
| __success __failure_unpriv |
| __msg_unpriv("R0 pointer arithmetic of map value goes out of range") |
| __retval(1) |
| __naked void upper_oob_arith_test_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 48; \ |
| r0 += r1; \ |
| r0 -= r1; \ |
| r0 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, upper oob arith, test 2") |
| __success __failure_unpriv |
| __msg_unpriv("R0 pointer arithmetic of map value goes out of range") |
| __retval(1) |
| __naked void upper_oob_arith_test_2(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 49; \ |
| r0 += r1; \ |
| r0 -= r1; \ |
| r0 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, upper oob arith, test 3") |
| __success __success_unpriv __retval(1) |
| __naked void upper_oob_arith_test_3(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 47; \ |
| r0 += r1; \ |
| r0 -= r1; \ |
| r0 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= known scalar, lower oob arith, test 1") |
| __failure __msg("R0 min value is outside of the allowed memory range") |
| __failure_unpriv |
| __msg_unpriv("R0 pointer arithmetic of map value goes out of range") |
| __naked void lower_oob_arith_test_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 47; \ |
| r0 += r1; \ |
| r1 = 48; \ |
| r0 -= r1; \ |
| r0 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= known scalar, lower oob arith, test 2") |
| __success __failure_unpriv |
| __msg_unpriv("R0 pointer arithmetic of map value goes out of range") |
| __retval(1) |
| __naked void lower_oob_arith_test_2(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 47; \ |
| r0 += r1; \ |
| r1 = 48; \ |
| r0 -= r1; \ |
| r1 = 1; \ |
| r0 += r1; \ |
| r0 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= known scalar, lower oob arith, test 3") |
| __success __success_unpriv __retval(1) |
| __naked void lower_oob_arith_test_3(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 47; \ |
| r0 += r1; \ |
| r1 = 47; \ |
| r0 -= r1; \ |
| r0 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar += value_ptr") |
| __success __success_unpriv __retval(1) |
| __naked void access_known_scalar_value_ptr_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 4; \ |
| r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, 1") |
| __success __success_unpriv __retval(1) |
| __naked void value_ptr_known_scalar_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 4; \ |
| r0 += r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, 2") |
| __failure __msg("invalid access to map value") |
| __failure_unpriv |
| __naked void value_ptr_known_scalar_2_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 49; \ |
| r0 += r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, 3") |
| __failure __msg("invalid access to map value") |
| __failure_unpriv |
| __naked void value_ptr_known_scalar_3(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = -1; \ |
| r0 += r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, 4") |
| __success __success_unpriv __retval(1) |
| __naked void value_ptr_known_scalar_4(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 5; \ |
| r0 += r1; \ |
| r1 = -2; \ |
| r0 += r1; \ |
| r1 = -1; \ |
| r0 += r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, 5") |
| __success __success_unpriv __retval(0xabcdef12) |
| __naked void value_ptr_known_scalar_5(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = %[__imm_0]; \ |
| r1 += r0; \ |
| r0 = *(u32*)(r1 + 0); \ |
| l0_%=: exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_const(__imm_0, (6 + 1) * sizeof(int)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += known scalar, 6") |
| __success __success_unpriv __retval(0xabcdef12) |
| __naked void value_ptr_known_scalar_6(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = %[__imm_0]; \ |
| r0 += r1; \ |
| r1 = %[__imm_1]; \ |
| r0 += r1; \ |
| r0 = *(u32*)(r0 + 0); \ |
| l0_%=: exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b), |
| __imm_const(__imm_0, (3 + 1) * sizeof(int)), |
| __imm_const(__imm_1, 3 * sizeof(int)) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += N, value_ptr -= N known scalar") |
| __success __success_unpriv __retval(0x12345678) |
| __naked void value_ptr_n_known_scalar(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| w1 = 0x12345678; \ |
| *(u32*)(r0 + 0) = r1; \ |
| r0 += 2; \ |
| r1 = 2; \ |
| r0 -= r1; \ |
| r0 = *(u32*)(r0 + 0); \ |
| l0_%=: exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: unknown scalar += value_ptr, 1") |
| __success __success_unpriv __retval(1) |
| __naked void unknown_scalar_value_ptr_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u8*)(r0 + 0); \ |
| r1 &= 0xf; \ |
| r1 += r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: unknown scalar += value_ptr, 2") |
| __success __success_unpriv __retval(0xabcdef12) __flag(BPF_F_ANY_ALIGNMENT) |
| __naked void unknown_scalar_value_ptr_2(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u32*)(r0 + 0); \ |
| r1 &= 31; \ |
| r1 += r0; \ |
| r0 = *(u32*)(r1 + 0); \ |
| l0_%=: exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: unknown scalar += value_ptr, 3") |
| __success __failure_unpriv |
| __msg_unpriv("R0 pointer arithmetic of map value goes out of range") |
| __retval(0xabcdef12) __flag(BPF_F_ANY_ALIGNMENT) |
| __naked void unknown_scalar_value_ptr_3(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = -1; \ |
| r0 += r1; \ |
| r1 = 1; \ |
| r0 += r1; \ |
| r1 = *(u32*)(r0 + 0); \ |
| r1 &= 31; \ |
| r1 += r0; \ |
| r0 = *(u32*)(r1 + 0); \ |
| l0_%=: exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: unknown scalar += value_ptr, 4") |
| __failure __msg("R1 max value is outside of the allowed memory range") |
| __msg_unpriv("R1 pointer arithmetic of map value goes out of range") |
| __flag(BPF_F_ANY_ALIGNMENT) |
| __naked void unknown_scalar_value_ptr_4(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 19; \ |
| r0 += r1; \ |
| r1 = *(u32*)(r0 + 0); \ |
| r1 &= 31; \ |
| r1 += r0; \ |
| r0 = *(u32*)(r1 + 0); \ |
| l0_%=: exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += unknown scalar, 1") |
| __success __success_unpriv __retval(1) |
| __naked void value_ptr_unknown_scalar_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u8*)(r0 + 0); \ |
| r1 &= 0xf; \ |
| r0 += r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += unknown scalar, 2") |
| __success __success_unpriv __retval(0xabcdef12) __flag(BPF_F_ANY_ALIGNMENT) |
| __naked void value_ptr_unknown_scalar_2_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u32*)(r0 + 0); \ |
| r1 &= 31; \ |
| r0 += r1; \ |
| r0 = *(u32*)(r0 + 0); \ |
| l0_%=: exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += unknown scalar, 3") |
| __success __success_unpriv __retval(1) |
| __naked void value_ptr_unknown_scalar_3(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u64*)(r0 + 0); \ |
| r2 = *(u64*)(r0 + 8); \ |
| r3 = *(u64*)(r0 + 16); \ |
| r1 &= 0xf; \ |
| r3 &= 1; \ |
| r3 |= 1; \ |
| if r2 > r3 goto l0_%=; \ |
| r0 += r3; \ |
| r0 = *(u8*)(r0 + 0); \ |
| r0 = 1; \ |
| l1_%=: exit; \ |
| l0_%=: r0 = 2; \ |
| goto l1_%=; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr += value_ptr") |
| __failure __msg("R0 pointer += pointer prohibited") |
| __failure_unpriv |
| __naked void access_value_ptr_value_ptr_1(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r0 += r0; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: known scalar -= value_ptr") |
| __failure __msg("R1 tried to subtract pointer from scalar") |
| __failure_unpriv |
| __naked void access_known_scalar_value_ptr_2(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 4; \ |
| r1 -= r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= known scalar") |
| __failure __msg("R0 min value is outside of the allowed memory range") |
| __failure_unpriv |
| __naked void access_value_ptr_known_scalar(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 4; \ |
| r0 -= r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= known scalar, 2") |
| __success __success_unpriv __retval(1) |
| __naked void value_ptr_known_scalar_2_2(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = 6; \ |
| r2 = 4; \ |
| r0 += r1; \ |
| r0 -= r2; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: unknown scalar -= value_ptr") |
| __failure __msg("R1 tried to subtract pointer from scalar") |
| __failure_unpriv |
| __naked void access_unknown_scalar_value_ptr(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u8*)(r0 + 0); \ |
| r1 &= 0xf; \ |
| r1 -= r0; \ |
| r0 = *(u8*)(r1 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= unknown scalar") |
| __failure __msg("R0 min value is negative") |
| __failure_unpriv |
| __naked void access_value_ptr_unknown_scalar(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u8*)(r0 + 0); \ |
| r1 &= 0xf; \ |
| r0 -= r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= unknown scalar, 2") |
| __success __failure_unpriv |
| __msg_unpriv("R0 pointer arithmetic of map value goes out of range") |
| __retval(1) |
| __naked void value_ptr_unknown_scalar_2_2(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r1 = *(u8*)(r0 + 0); \ |
| r1 &= 0xf; \ |
| r1 |= 0x7; \ |
| r0 += r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| r1 &= 0x7; \ |
| r0 -= r1; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: value_ptr -= value_ptr") |
| __failure __msg("R0 invalid mem access 'scalar'") |
| __msg_unpriv("R0 pointer -= pointer prohibited") |
| __naked void access_value_ptr_value_ptr_2(void) |
| { |
| asm volatile (" \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 == 0 goto l0_%=; \ |
| r0 -= r0; \ |
| r1 = *(u8*)(r0 + 0); \ |
| l0_%=: r0 = 1; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("socket") |
| __description("map access: trying to leak tainted dst reg") |
| __failure __msg("math between map_value pointer and 4294967295 is not allowed") |
| __failure_unpriv |
| __naked void to_leak_tainted_dst_reg(void) |
| { |
| asm volatile (" \ |
| r0 = 0; \ |
| r1 = 0; \ |
| *(u64*)(r10 - 8) = r1; \ |
| r2 = r10; \ |
| r2 += -8; \ |
| r1 = %[map_array_48b] ll; \ |
| call %[bpf_map_lookup_elem]; \ |
| if r0 != 0 goto l0_%=; \ |
| exit; \ |
| l0_%=: r2 = r0; \ |
| w1 = 0xFFFFFFFF; \ |
| w1 = w1; \ |
| r2 -= r1; \ |
| *(u64*)(r0 + 0) = r2; \ |
| r0 = 0; \ |
| exit; \ |
| " : |
| : __imm(bpf_map_lookup_elem), |
| __imm_addr(map_array_48b) |
| : __clobber_all); |
| } |
| |
| SEC("tc") |
| __description("32bit pkt_ptr -= scalar") |
| __success __retval(0) __flag(BPF_F_ANY_ALIGNMENT) |
| __naked void _32bit_pkt_ptr_scalar(void) |
| { |
| asm volatile (" \ |
| r8 = *(u32*)(r1 + %[__sk_buff_data_end]); \ |
| r7 = *(u32*)(r1 + %[__sk_buff_data]); \ |
| r6 = r7; \ |
| r6 += 40; \ |
| if r6 > r8 goto l0_%=; \ |
| w4 = w7; \ |
| w6 -= w4; \ |
| l0_%=: r0 = 0; \ |
| exit; \ |
| " : |
| : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)), |
| __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end)) |
| : __clobber_all); |
| } |
| |
| SEC("tc") |
| __description("32bit scalar -= pkt_ptr") |
| __success __retval(0) __flag(BPF_F_ANY_ALIGNMENT) |
| __naked void _32bit_scalar_pkt_ptr(void) |
| { |
| asm volatile (" \ |
| r8 = *(u32*)(r1 + %[__sk_buff_data_end]); \ |
| r7 = *(u32*)(r1 + %[__sk_buff_data]); \ |
| r6 = r7; \ |
| r6 += 40; \ |
| if r6 > r8 goto l0_%=; \ |
| w4 = w6; \ |
| w4 -= w7; \ |
| l0_%=: r0 = 0; \ |
| exit; \ |
| " : |
| : __imm_const(__sk_buff_data, offsetof(struct __sk_buff, data)), |
| __imm_const(__sk_buff_data_end, offsetof(struct __sk_buff, data_end)) |
| : __clobber_all); |
| } |
| |
| char _license[] SEC("license") = "GPL"; |
