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selftests/bpf: verifier/stack_ptr.c converted to inline assembly
Test verifier/stack_ptr.c automatically converted to use inline assembly. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20230325025524.144043-36-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Eduard Zingerman
Alexei Starovoitov
parent
f4fe3cfe6c
commit
edff37b2f2
@ -32,6 +32,7 @@
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#include "verifier_raw_tp_writable.skel.h"
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#include "verifier_ringbuf.skel.h"
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#include "verifier_spill_fill.skel.h"
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#include "verifier_stack_ptr.skel.h"
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__maybe_unused
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static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_factory)
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@ -86,3 +87,4 @@ void test_verifier_raw_stack(void) { RUN(verifier_raw_stack); }
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void test_verifier_raw_tp_writable(void) { RUN(verifier_raw_tp_writable); }
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void test_verifier_ringbuf(void) { RUN(verifier_ringbuf); }
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void test_verifier_spill_fill(void) { RUN(verifier_spill_fill); }
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void test_verifier_stack_ptr(void) { RUN(verifier_stack_ptr); }
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484
tools/testing/selftests/bpf/progs/verifier_stack_ptr.c
Normal file
484
tools/testing/selftests/bpf/progs/verifier_stack_ptr.c
Normal file
@ -0,0 +1,484 @@
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// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/stack_ptr.c */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include <limits.h>
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#include "bpf_misc.h"
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#define MAX_ENTRIES 11
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struct test_val {
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unsigned int index;
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int foo[MAX_ENTRIES];
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};
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struct {
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__uint(type, BPF_MAP_TYPE_ARRAY);
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__uint(max_entries, 1);
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__type(key, int);
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__type(value, struct test_val);
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} map_array_48b SEC(".maps");
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SEC("socket")
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__description("PTR_TO_STACK store/load")
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__success __success_unpriv __retval(0xfaceb00c)
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__naked void ptr_to_stack_store_load(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -10; \
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r0 = 0xfaceb00c; \
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*(u64*)(r1 + 2) = r0; \
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r0 = *(u64*)(r1 + 2); \
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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("PTR_TO_STACK store/load - bad alignment on off")
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__failure __msg("misaligned stack access off (0x0; 0x0)+-8+2 size 8")
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__failure_unpriv
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__naked void load_bad_alignment_on_off(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -8; \
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r0 = 0xfaceb00c; \
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*(u64*)(r1 + 2) = r0; \
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r0 = *(u64*)(r1 + 2); \
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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("PTR_TO_STACK store/load - bad alignment on reg")
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__failure __msg("misaligned stack access off (0x0; 0x0)+-10+8 size 8")
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__failure_unpriv
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__naked void load_bad_alignment_on_reg(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -10; \
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r0 = 0xfaceb00c; \
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*(u64*)(r1 + 8) = r0; \
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r0 = *(u64*)(r1 + 8); \
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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("PTR_TO_STACK store/load - out of bounds low")
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__failure __msg("invalid write to stack R1 off=-79992 size=8")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void load_out_of_bounds_low(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -80000; \
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r0 = 0xfaceb00c; \
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*(u64*)(r1 + 8) = r0; \
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r0 = *(u64*)(r1 + 8); \
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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("PTR_TO_STACK store/load - out of bounds high")
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__failure __msg("invalid write to stack R1 off=0 size=8")
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__failure_unpriv
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__naked void load_out_of_bounds_high(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -8; \
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r0 = 0xfaceb00c; \
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*(u64*)(r1 + 8) = r0; \
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r0 = *(u64*)(r1 + 8); \
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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("PTR_TO_STACK check high 1")
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__success __success_unpriv __retval(42)
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__naked void to_stack_check_high_1(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -1; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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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("PTR_TO_STACK check high 2")
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__success __success_unpriv __retval(42)
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__naked void to_stack_check_high_2(void)
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{
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asm volatile (" \
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r1 = r10; \
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r0 = 42; \
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*(u8*)(r1 - 1) = r0; \
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r0 = *(u8*)(r1 - 1); \
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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("PTR_TO_STACK check high 3")
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__success __failure_unpriv
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__retval(42)
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__naked void to_stack_check_high_3(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += 0; \
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r0 = 42; \
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*(u8*)(r1 - 1) = r0; \
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r0 = *(u8*)(r1 - 1); \
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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("PTR_TO_STACK check high 4")
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__failure __msg("invalid write to stack R1 off=0 size=1")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_high_4(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += 0; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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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("PTR_TO_STACK check high 5")
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__failure __msg("invalid write to stack R1")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_high_5(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += %[__imm_0]; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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exit; \
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" :
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: __imm_const(__imm_0, (1 << 29) - 1)
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: __clobber_all);
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}
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SEC("socket")
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__description("PTR_TO_STACK check high 6")
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__failure __msg("invalid write to stack")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_high_6(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += %[__imm_0]; \
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r0 = 42; \
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*(u8*)(r1 + %[shrt_max]) = r0; \
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r0 = *(u8*)(r1 + %[shrt_max]); \
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exit; \
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" :
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: __imm_const(__imm_0, (1 << 29) - 1),
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__imm_const(shrt_max, SHRT_MAX)
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: __clobber_all);
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}
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SEC("socket")
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__description("PTR_TO_STACK check high 7")
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__failure __msg("fp pointer offset")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_high_7(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += %[__imm_0]; \
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r1 += %[__imm_0]; \
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r0 = 42; \
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*(u8*)(r1 + %[shrt_max]) = r0; \
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r0 = *(u8*)(r1 + %[shrt_max]); \
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exit; \
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" :
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: __imm_const(__imm_0, (1 << 29) - 1),
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__imm_const(shrt_max, SHRT_MAX)
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: __clobber_all);
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}
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SEC("socket")
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__description("PTR_TO_STACK check low 1")
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__success __success_unpriv __retval(42)
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__naked void to_stack_check_low_1(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -512; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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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("PTR_TO_STACK check low 2")
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__success __failure_unpriv
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__retval(42)
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__naked void to_stack_check_low_2(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -513; \
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r0 = 42; \
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*(u8*)(r1 + 1) = r0; \
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r0 = *(u8*)(r1 + 1); \
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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("PTR_TO_STACK check low 3")
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__failure __msg("invalid write to stack R1 off=-513 size=1")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_low_3(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -513; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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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("PTR_TO_STACK check low 4")
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__failure __msg("math between fp pointer")
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__failure_unpriv
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__naked void to_stack_check_low_4(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += %[int_min]; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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exit; \
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" :
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: __imm_const(int_min, INT_MIN)
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: __clobber_all);
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}
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SEC("socket")
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__description("PTR_TO_STACK check low 5")
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__failure __msg("invalid write to stack")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_low_5(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += %[__imm_0]; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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exit; \
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" :
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: __imm_const(__imm_0, -((1 << 29) - 1))
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: __clobber_all);
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}
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SEC("socket")
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__description("PTR_TO_STACK check low 6")
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__failure __msg("invalid write to stack")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_low_6(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += %[__imm_0]; \
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r0 = 42; \
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*(u8*)(r1 %[shrt_min]) = r0; \
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r0 = *(u8*)(r1 %[shrt_min]); \
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exit; \
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" :
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: __imm_const(__imm_0, -((1 << 29) - 1)),
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__imm_const(shrt_min, SHRT_MIN)
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: __clobber_all);
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}
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SEC("socket")
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__description("PTR_TO_STACK check low 7")
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__failure __msg("fp pointer offset")
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__msg_unpriv("R1 stack pointer arithmetic goes out of range")
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__naked void to_stack_check_low_7(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += %[__imm_0]; \
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r1 += %[__imm_0]; \
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r0 = 42; \
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*(u8*)(r1 %[shrt_min]) = r0; \
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r0 = *(u8*)(r1 %[shrt_min]); \
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exit; \
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" :
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: __imm_const(__imm_0, -((1 << 29) - 1)),
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__imm_const(shrt_min, SHRT_MIN)
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: __clobber_all);
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}
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SEC("socket")
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__description("PTR_TO_STACK mixed reg/k, 1")
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__success __success_unpriv __retval(42)
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__naked void stack_mixed_reg_k_1(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -3; \
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r2 = -3; \
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r1 += r2; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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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("PTR_TO_STACK mixed reg/k, 2")
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__success __success_unpriv __retval(42)
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__naked void stack_mixed_reg_k_2(void)
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{
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asm volatile (" \
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r0 = 0; \
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*(u64*)(r10 - 8) = r0; \
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r0 = 0; \
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*(u64*)(r10 - 16) = r0; \
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r1 = r10; \
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r1 += -3; \
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r2 = -3; \
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r1 += r2; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r5 = r10; \
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r0 = *(u8*)(r5 - 6); \
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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("PTR_TO_STACK mixed reg/k, 3")
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__success __success_unpriv __retval(-3)
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__naked void stack_mixed_reg_k_3(void)
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{
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asm volatile (" \
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r1 = r10; \
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r1 += -3; \
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r2 = -3; \
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r1 += r2; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = r2; \
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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("PTR_TO_STACK reg")
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__success __success_unpriv __retval(42)
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__naked void ptr_to_stack_reg(void)
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{
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asm volatile (" \
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r1 = r10; \
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r2 = -3; \
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r1 += r2; \
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r0 = 42; \
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*(u8*)(r1 + 0) = r0; \
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r0 = *(u8*)(r1 + 0); \
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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("stack pointer arithmetic")
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__success __success_unpriv __retval(0)
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__naked void stack_pointer_arithmetic(void)
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{
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asm volatile (" \
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r1 = 4; \
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goto l0_%=; \
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l0_%=: r7 = r10; \
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r7 += -10; \
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r7 += -10; \
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r2 = r7; \
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r2 += r1; \
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r0 = 0; \
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*(u32*)(r2 + 4) = r0; \
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r2 = r7; \
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r2 += 8; \
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r0 = 0; \
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*(u32*)(r2 + 4) = r0; \
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r0 = 0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("tc")
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__description("store PTR_TO_STACK in R10 to array map using BPF_B")
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__success __retval(42)
|
||||
__naked void array_map_using_bpf_b(void)
|
||||
{
|
||||
asm volatile (" \
|
||||
/* Load pointer to map. */ \
|
||||
r2 = r10; \
|
||||
r2 += -8; \
|
||||
r1 = 0; \
|
||||
*(u64*)(r2 + 0) = r1; \
|
||||
r1 = %[map_array_48b] ll; \
|
||||
call %[bpf_map_lookup_elem]; \
|
||||
if r0 != 0 goto l0_%=; \
|
||||
r0 = 2; \
|
||||
exit; \
|
||||
l0_%=: r1 = r0; \
|
||||
/* Copy R10 to R9. */ \
|
||||
r9 = r10; \
|
||||
/* Pollute other registers with unaligned values. */\
|
||||
r2 = -1; \
|
||||
r3 = -1; \
|
||||
r4 = -1; \
|
||||
r5 = -1; \
|
||||
r6 = -1; \
|
||||
r7 = -1; \
|
||||
r8 = -1; \
|
||||
/* Store both R9 and R10 with BPF_B and read back. */\
|
||||
*(u8*)(r1 + 0) = r10; \
|
||||
r2 = *(u8*)(r1 + 0); \
|
||||
*(u8*)(r1 + 0) = r9; \
|
||||
r3 = *(u8*)(r1 + 0); \
|
||||
/* Should read back as same value. */ \
|
||||
if r2 == r3 goto l1_%=; \
|
||||
r0 = 1; \
|
||||
exit; \
|
||||
l1_%=: r0 = 42; \
|
||||
exit; \
|
||||
" :
|
||||
: __imm(bpf_map_lookup_elem),
|
||||
__imm_addr(map_array_48b)
|
||||
: __clobber_all);
|
||||
}
|
||||
|
||||
char _license[] SEC("license") = "GPL";
|
||||
@ -1,359 +0,0 @@
|
||||
{
|
||||
"PTR_TO_STACK store/load",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -10),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_1, 2, 0xfaceb00c),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 2),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = 0xfaceb00c,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK store/load - bad alignment on off",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_1, 2, 0xfaceb00c),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 2),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "misaligned stack access off (0x0; 0x0)+-8+2 size 8",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK store/load - bad alignment on reg",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -10),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_1, 8, 0xfaceb00c),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 8),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "misaligned stack access off (0x0; 0x0)+-10+8 size 8",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK store/load - out of bounds low",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -80000),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_1, 8, 0xfaceb00c),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 8),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "invalid write to stack R1 off=-79992 size=8",
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK store/load - out of bounds high",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -8),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_1, 8, 0xfaceb00c),
|
||||
BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, 8),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "invalid write to stack R1 off=0 size=8",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check high 1",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -1),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check high 2",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, -1, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, -1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check high 3",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, -1, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, -1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.result_unpriv = REJECT,
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check high 4",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.errstr = "invalid write to stack R1 off=0 size=1",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check high 5",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.errstr = "invalid write to stack R1",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check high 6",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MAX, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MAX),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.errstr = "invalid write to stack",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check high 7",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, (1 << 29) - 1),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MAX, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MAX),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.errstr = "fp pointer offset",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check low 1",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -512),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check low 2",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -513),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 1, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result_unpriv = REJECT,
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check low 3",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -513),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.errstr = "invalid write to stack R1 off=-513 size=1",
|
||||
.result = REJECT,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check low 4",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, INT_MIN),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "math between fp pointer",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check low 5",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.errstr = "invalid write to stack",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check low 6",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MIN, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MIN),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr = "invalid write to stack",
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK check low 7",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -((1 << 29) - 1)),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, SHRT_MIN, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, SHRT_MIN),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = REJECT,
|
||||
.errstr_unpriv = "R1 stack pointer arithmetic goes out of range",
|
||||
.errstr = "fp pointer offset",
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK mixed reg/k, 1",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -3),
|
||||
BPF_MOV64_IMM(BPF_REG_2, -3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK mixed reg/k, 2",
|
||||
.insns = {
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_10, -16, 0),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -3),
|
||||
BPF_MOV64_IMM(BPF_REG_2, -3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_MOV64_REG(BPF_REG_5, BPF_REG_10),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_5, -6),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK mixed reg/k, 3",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, -3),
|
||||
BPF_MOV64_IMM(BPF_REG_2, -3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_MOV64_REG(BPF_REG_0, BPF_REG_2),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = -3,
|
||||
},
|
||||
{
|
||||
"PTR_TO_STACK reg",
|
||||
.insns = {
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_10),
|
||||
BPF_MOV64_IMM(BPF_REG_2, -3),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2),
|
||||
BPF_ST_MEM(BPF_B, BPF_REG_1, 0, 42),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
},
|
||||
{
|
||||
"stack pointer arithmetic",
|
||||
.insns = {
|
||||
BPF_MOV64_IMM(BPF_REG_1, 4),
|
||||
BPF_JMP_IMM(BPF_JA, 0, 0, 0),
|
||||
BPF_MOV64_REG(BPF_REG_7, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_7, -10),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_7),
|
||||
BPF_ALU64_REG(BPF_ADD, BPF_REG_2, BPF_REG_1),
|
||||
BPF_ST_MEM(0, BPF_REG_2, 4, 0),
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_7),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, 8),
|
||||
BPF_ST_MEM(0, BPF_REG_2, 4, 0),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 0),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.result = ACCEPT,
|
||||
},
|
||||
{
|
||||
"store PTR_TO_STACK in R10 to array map using BPF_B",
|
||||
.insns = {
|
||||
/* Load pointer to map. */
|
||||
BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
|
||||
BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
|
||||
BPF_ST_MEM(BPF_DW, BPF_REG_2, 0, 0),
|
||||
BPF_LD_MAP_FD(BPF_REG_1, 0),
|
||||
BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
|
||||
BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 2),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
|
||||
/* Copy R10 to R9. */
|
||||
BPF_MOV64_REG(BPF_REG_9, BPF_REG_10),
|
||||
/* Pollute other registers with unaligned values. */
|
||||
BPF_MOV64_IMM(BPF_REG_2, -1),
|
||||
BPF_MOV64_IMM(BPF_REG_3, -1),
|
||||
BPF_MOV64_IMM(BPF_REG_4, -1),
|
||||
BPF_MOV64_IMM(BPF_REG_5, -1),
|
||||
BPF_MOV64_IMM(BPF_REG_6, -1),
|
||||
BPF_MOV64_IMM(BPF_REG_7, -1),
|
||||
BPF_MOV64_IMM(BPF_REG_8, -1),
|
||||
/* Store both R9 and R10 with BPF_B and read back. */
|
||||
BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_10, 0),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_2, BPF_REG_1, 0),
|
||||
BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_9, 0),
|
||||
BPF_LDX_MEM(BPF_B, BPF_REG_3, BPF_REG_1, 0),
|
||||
/* Should read back as same value. */
|
||||
BPF_JMP_REG(BPF_JEQ, BPF_REG_2, BPF_REG_3, 2),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 1),
|
||||
BPF_EXIT_INSN(),
|
||||
BPF_MOV64_IMM(BPF_REG_0, 42),
|
||||
BPF_EXIT_INSN(),
|
||||
},
|
||||
.fixup_map_array_48b = { 3 },
|
||||
.result = ACCEPT,
|
||||
.retval = 42,
|
||||
.prog_type = BPF_PROG_TYPE_SCHED_CLS,
|
||||
},
|
||||
Loading…
Reference in New Issue
Block a user