--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/* Converted from tools/testing/selftests/bpf/verifier/stack_ptr.c */
+
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+#include <limits.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");
+
+SEC("socket")
+__description("PTR_TO_STACK store/load")
+__success __success_unpriv __retval(0xfaceb00c)
+__naked void ptr_to_stack_store_load(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -10; \
+ r0 = 0xfaceb00c; \
+ *(u64*)(r1 + 2) = r0; \
+ r0 = *(u64*)(r1 + 2); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK store/load - bad alignment on off")
+__failure __msg("misaligned stack access off (0x0; 0x0)+-8+2 size 8")
+__failure_unpriv
+__naked void load_bad_alignment_on_off(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -8; \
+ r0 = 0xfaceb00c; \
+ *(u64*)(r1 + 2) = r0; \
+ r0 = *(u64*)(r1 + 2); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK store/load - bad alignment on reg")
+__failure __msg("misaligned stack access off (0x0; 0x0)+-10+8 size 8")
+__failure_unpriv
+__naked void load_bad_alignment_on_reg(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -10; \
+ r0 = 0xfaceb00c; \
+ *(u64*)(r1 + 8) = r0; \
+ r0 = *(u64*)(r1 + 8); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK store/load - out of bounds low")
+__failure __msg("invalid write to stack R1 off=-79992 size=8")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void load_out_of_bounds_low(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -80000; \
+ r0 = 0xfaceb00c; \
+ *(u64*)(r1 + 8) = r0; \
+ r0 = *(u64*)(r1 + 8); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK store/load - out of bounds high")
+__failure __msg("invalid write to stack R1 off=0 size=8")
+__failure_unpriv
+__naked void load_out_of_bounds_high(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -8; \
+ r0 = 0xfaceb00c; \
+ *(u64*)(r1 + 8) = r0; \
+ r0 = *(u64*)(r1 + 8); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check high 1")
+__success __success_unpriv __retval(42)
+__naked void to_stack_check_high_1(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -1; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check high 2")
+__success __success_unpriv __retval(42)
+__naked void to_stack_check_high_2(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r0 = 42; \
+ *(u8*)(r1 - 1) = r0; \
+ r0 = *(u8*)(r1 - 1); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check high 3")
+__success __failure_unpriv
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__retval(42)
+__naked void to_stack_check_high_3(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += 0; \
+ r0 = 42; \
+ *(u8*)(r1 - 1) = r0; \
+ r0 = *(u8*)(r1 - 1); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check high 4")
+__failure __msg("invalid write to stack R1 off=0 size=1")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_high_4(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += 0; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check high 5")
+__failure __msg("invalid write to stack R1")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_high_5(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += %[__imm_0]; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" :
+ : __imm_const(__imm_0, (1 << 29) - 1)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check high 6")
+__failure __msg("invalid write to stack")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_high_6(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += %[__imm_0]; \
+ r0 = 42; \
+ *(u8*)(r1 + %[shrt_max]) = r0; \
+ r0 = *(u8*)(r1 + %[shrt_max]); \
+ exit; \
+" :
+ : __imm_const(__imm_0, (1 << 29) - 1),
+ __imm_const(shrt_max, SHRT_MAX)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check high 7")
+__failure __msg("fp pointer offset")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_high_7(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += %[__imm_0]; \
+ r1 += %[__imm_0]; \
+ r0 = 42; \
+ *(u8*)(r1 + %[shrt_max]) = r0; \
+ r0 = *(u8*)(r1 + %[shrt_max]); \
+ exit; \
+" :
+ : __imm_const(__imm_0, (1 << 29) - 1),
+ __imm_const(shrt_max, SHRT_MAX)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check low 1")
+__success __success_unpriv __retval(42)
+__naked void to_stack_check_low_1(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -512; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check low 2")
+__success __failure_unpriv
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__retval(42)
+__naked void to_stack_check_low_2(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -513; \
+ r0 = 42; \
+ *(u8*)(r1 + 1) = r0; \
+ r0 = *(u8*)(r1 + 1); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check low 3")
+__failure __msg("invalid write to stack R1 off=-513 size=1")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_low_3(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -513; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check low 4")
+__failure __msg("math between fp pointer")
+__failure_unpriv
+__naked void to_stack_check_low_4(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += %[int_min]; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" :
+ : __imm_const(int_min, INT_MIN)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check low 5")
+__failure __msg("invalid write to stack")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_low_5(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += %[__imm_0]; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" :
+ : __imm_const(__imm_0, -((1 << 29) - 1))
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check low 6")
+__failure __msg("invalid write to stack")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_low_6(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += %[__imm_0]; \
+ r0 = 42; \
+ *(u8*)(r1 %[shrt_min]) = r0; \
+ r0 = *(u8*)(r1 %[shrt_min]); \
+ exit; \
+" :
+ : __imm_const(__imm_0, -((1 << 29) - 1)),
+ __imm_const(shrt_min, SHRT_MIN)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK check low 7")
+__failure __msg("fp pointer offset")
+__msg_unpriv("R1 stack pointer arithmetic goes out of range")
+__naked void to_stack_check_low_7(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += %[__imm_0]; \
+ r1 += %[__imm_0]; \
+ r0 = 42; \
+ *(u8*)(r1 %[shrt_min]) = r0; \
+ r0 = *(u8*)(r1 %[shrt_min]); \
+ exit; \
+" :
+ : __imm_const(__imm_0, -((1 << 29) - 1)),
+ __imm_const(shrt_min, SHRT_MIN)
+ : __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK mixed reg/k, 1")
+__success __success_unpriv __retval(42)
+__naked void stack_mixed_reg_k_1(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -3; \
+ r2 = -3; \
+ r1 += r2; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK mixed reg/k, 2")
+__success __success_unpriv __retval(42)
+__naked void stack_mixed_reg_k_2(void)
+{
+ asm volatile (" \
+ r0 = 0; \
+ *(u64*)(r10 - 8) = r0; \
+ r0 = 0; \
+ *(u64*)(r10 - 16) = r0; \
+ r1 = r10; \
+ r1 += -3; \
+ r2 = -3; \
+ r1 += r2; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r5 = r10; \
+ r0 = *(u8*)(r5 - 6); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK mixed reg/k, 3")
+__success __success_unpriv __retval(-3)
+__naked void stack_mixed_reg_k_3(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r1 += -3; \
+ r2 = -3; \
+ r1 += r2; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = r2; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("PTR_TO_STACK reg")
+__success __success_unpriv __retval(42)
+__naked void ptr_to_stack_reg(void)
+{
+ asm volatile (" \
+ r1 = r10; \
+ r2 = -3; \
+ r1 += r2; \
+ r0 = 42; \
+ *(u8*)(r1 + 0) = r0; \
+ r0 = *(u8*)(r1 + 0); \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("socket")
+__description("stack pointer arithmetic")
+__success __success_unpriv __retval(0)
+__naked void stack_pointer_arithmetic(void)
+{
+ asm volatile (" \
+ r1 = 4; \
+ goto l0_%=; \
+l0_%=: r7 = r10; \
+ r7 += -10; \
+ r7 += -10; \
+ r2 = r7; \
+ r2 += r1; \
+ r0 = 0; \
+ *(u32*)(r2 + 4) = r0; \
+ r2 = r7; \
+ r2 += 8; \
+ r0 = 0; \
+ *(u32*)(r2 + 4) = r0; \
+ r0 = 0; \
+ exit; \
+" ::: __clobber_all);
+}
+
+SEC("tc")
+__description("store PTR_TO_STACK in R10 to array map using BPF_B")
+__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";
+++ /dev/null
-{
- "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,
-},
projects / platform / kernel / linux-starfive.git / commitdiff