172 lines
4.3 KiB
C
172 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/bounds_deduction.c */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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SEC("socket")
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__description("check deducing bounds from const, 1")
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__failure __msg("R0 tried to subtract pointer from scalar")
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__naked void deducing_bounds_from_const_1(void)
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{
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asm volatile (" \
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r0 = 1; \
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if r0 s>= 1 goto l0_%=; \
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l0_%=: r0 -= r1; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 2")
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__success __failure_unpriv
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__retval(1)
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__naked void deducing_bounds_from_const_2(void)
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{
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asm volatile (" \
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r0 = 1; \
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if r0 s>= 1 goto l0_%=; \
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exit; \
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l0_%=: if r0 s<= 1 goto l1_%=; \
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exit; \
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l1_%=: r1 -= r0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 3")
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__failure __msg("R0 tried to subtract pointer from scalar")
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__naked void deducing_bounds_from_const_3(void)
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{
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asm volatile (" \
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r0 = 0; \
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if r0 s<= 0 goto l0_%=; \
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l0_%=: r0 -= r1; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 4")
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__success __failure_unpriv
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__msg_unpriv("R6 has pointer with unsupported alu operation")
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__retval(0)
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__naked void deducing_bounds_from_const_4(void)
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{
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asm volatile (" \
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r6 = r1; \
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r0 = 0; \
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if r0 s<= 0 goto l0_%=; \
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exit; \
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l0_%=: if r0 s>= 0 goto l1_%=; \
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exit; \
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l1_%=: r6 -= r0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 5")
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__failure __msg("R0 tried to subtract pointer from scalar")
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__naked void deducing_bounds_from_const_5(void)
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{
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asm volatile (" \
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r0 = 0; \
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if r0 s>= 1 goto l0_%=; \
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r0 -= r1; \
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l0_%=: exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 6")
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__failure __msg("R0 tried to subtract pointer from scalar")
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__naked void deducing_bounds_from_const_6(void)
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{
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asm volatile (" \
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r0 = 0; \
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if r0 s>= 0 goto l0_%=; \
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exit; \
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l0_%=: r0 -= r1; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 7")
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__failure __msg("dereference of modified ctx ptr")
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void deducing_bounds_from_const_7(void)
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{
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asm volatile (" \
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r0 = %[__imm_0]; \
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if r0 s>= 0 goto l0_%=; \
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l0_%=: r1 -= r0; \
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r0 = *(u32*)(r1 + %[__sk_buff_mark]); \
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exit; \
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" :
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: __imm_const(__imm_0, ~0),
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__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark))
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: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 8")
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__failure __msg("negative offset ctx ptr R1 off=-1 disallowed")
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void deducing_bounds_from_const_8(void)
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{
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asm volatile (" \
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r0 = %[__imm_0]; \
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if r0 s>= 0 goto l0_%=; \
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r1 += r0; \
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l0_%=: r0 = *(u32*)(r1 + %[__sk_buff_mark]); \
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exit; \
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" :
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: __imm_const(__imm_0, ~0),
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__imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark))
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: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 9")
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__failure __msg("R0 tried to subtract pointer from scalar")
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__msg_unpriv("R1 has pointer with unsupported alu operation")
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__naked void deducing_bounds_from_const_9(void)
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{
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asm volatile (" \
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r0 = 0; \
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if r0 s>= 0 goto l0_%=; \
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l0_%=: r0 -= r1; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("check deducing bounds from const, 10")
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__failure
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__msg("math between ctx pointer and register with unbounded min value is not allowed")
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__failure_unpriv
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__naked void deducing_bounds_from_const_10(void)
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{
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asm volatile (" \
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r0 = 0; \
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if r0 s<= 0 goto l0_%=; \
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l0_%=: /* Marks reg as unknown. */ \
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r0 = -r0; \
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r0 -= r1; \
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exit; \
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" ::: __clobber_all);
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}
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char _license[] SEC("license") = "GPL";
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