#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
SEC("socket")
__description("check deducing bounds from const, 1")
__failure __msg("R0 tried to subtract pointer from scalar")
__msg_unpriv("R1 has pointer with unsupported alu operation")
__naked void deducing_bounds_from_const_1(void)
{
asm volatile (" \
r0 = 1; \
if r0 s>= 1 goto l0_%=; \
l0_%=: r0 -= r1; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 2")
__success __failure_unpriv
__msg_unpriv("R1 has pointer with unsupported alu operation")
__retval(1)
__naked void deducing_bounds_from_const_2(void)
{
asm volatile (" \
r0 = 1; \
if r0 s>= 1 goto l0_%=; \
exit; \
l0_%=: if r0 s<= 1 goto l1_%=; \
exit; \
l1_%=: r1 -= r0; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 3")
__failure __msg("R0 tried to subtract pointer from scalar")
__msg_unpriv("R1 has pointer with unsupported alu operation")
__naked void deducing_bounds_from_const_3(void)
{
asm volatile (" \
r0 = 0; \
if r0 s<= 0 goto l0_%=; \
l0_%=: r0 -= r1; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 4")
__success __failure_unpriv
__msg_unpriv("R6 has pointer with unsupported alu operation")
__retval(0)
__naked void deducing_bounds_from_const_4(void)
{
asm volatile (" \
r6 = r1; \
r0 = 0; \
if r0 s<= 0 goto l0_%=; \
exit; \
l0_%=: if r0 s>= 0 goto l1_%=; \
exit; \
l1_%=: r6 -= r0; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 5")
__failure __msg("R0 tried to subtract pointer from scalar")
__msg_unpriv("R1 has pointer with unsupported alu operation")
__naked void deducing_bounds_from_const_5(void)
{
asm volatile (" \
r0 = 0; \
if r0 s>= 1 goto l0_%=; \
r0 -= r1; \
l0_%=: exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 6")
__failure __msg("R0 tried to subtract pointer from scalar")
__msg_unpriv("R1 has pointer with unsupported alu operation")
__naked void deducing_bounds_from_const_6(void)
{
asm volatile (" \
r0 = 0; \
if r0 s>= 0 goto l0_%=; \
exit; \
l0_%=: r0 -= r1; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 7")
__failure __msg("dereference of modified ctx ptr")
__msg_unpriv("R1 has pointer with unsupported alu operation")
__flag(BPF_F_ANY_ALIGNMENT)
__naked void deducing_bounds_from_const_7(void)
{
asm volatile (" \
r0 = %[__imm_0]; \
if r0 s>= 0 goto l0_%=; \
l0_%=: r1 -= r0; \
r0 = *(u32*)(r1 + %[__sk_buff_mark]); \
exit; \
" :
: __imm_const(__imm_0, ~0),
__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark))
: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 8")
__failure __msg("negative offset ctx ptr R1 off=-1 disallowed")
__msg_unpriv("R1 has pointer with unsupported alu operation")
__flag(BPF_F_ANY_ALIGNMENT)
__naked void deducing_bounds_from_const_8(void)
{
asm volatile (" \
r0 = %[__imm_0]; \
if r0 s>= 0 goto l0_%=; \
r1 += r0; \
l0_%=: r0 = *(u32*)(r1 + %[__sk_buff_mark]); \
exit; \
" :
: __imm_const(__imm_0, ~0),
__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark))
: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 9")
__failure __msg("R0 tried to subtract pointer from scalar")
__msg_unpriv("R1 has pointer with unsupported alu operation")
__naked void deducing_bounds_from_const_9(void)
{
asm volatile (" \
r0 = 0; \
if r0 s>= 0 goto l0_%=; \
l0_%=: r0 -= r1; \
exit; \
" ::: __clobber_all);
}
SEC("socket")
__description("check deducing bounds from const, 10")
__failure
__msg("math between ctx pointer and register with unbounded min value is not allowed")
__failure_unpriv
__naked void deducing_bounds_from_const_10(void)
{
asm volatile (" \
r6 = r1; \
r0 = 0; \
if r0 s<= 0 goto l0_%=; \
l0_%=: /* Marks r0 as unknown. */ \
call %[bpf_get_prandom_u32]; \
r0 -= r6; \
exit; \
" :
: __imm(bpf_get_prandom_u32)
: __clobber_all);
}
char _license[] SEC("license") = "GPL";
