#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 (" \
r8 = r1; \
call %[bpf_get_prandom_u32]; \
r9 = r0; \
r1 = r8; \
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 = r9; \
r1 &= 0x3; \
goto l4_%=; \
l3_%=: r1 = 6; \
r1 = r9; \
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)),
__imm(bpf_get_prandom_u32)
: __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 (" \
r8 = r1; \
call %[bpf_get_prandom_u32]; \
r9 = r0; \
r1 = r8; \
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 = r9; \
r1 &= 0x7; \
goto l4_%=; \
l3_%=: r1 = 6; \
r1 = r9; \
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)),
__imm(bpf_get_prandom_u32)
: __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 tried to add from different maps, paths or scalars, pointer arithmetic with it prohibited for !root")
__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 */ \
/* unpriv: nospec (inserted to prevent `R2 pointer comparison prohibited`) */\
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("R2 tried to add from different maps, paths or scalars, pointer arithmetic with it prohibited for !root")
__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 \
*/ \
/* unpriv: nospec (inserted to prevent `R0 invalid mem access 'scalar'`) */\
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 __success_unpriv
__retval(1)
#ifdef SPEC_V1
__xlated_unpriv("r1 &= 7")
__xlated_unpriv("nospec")
__xlated_unpriv("r0 -= r1")
#endif
__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";
