Commit 5a77a01f authored by Eduard Zingerman's avatar Eduard Zingerman Committed by Alexei Starovoitov
Browse files

selftests/bpf: verifier/raw_stack.c converted to inline assembly 



Test verifier/raw_stack.c automatically converted to use inline assembly.

Signed-off-by: default avatarEduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20230325025524.144043-32-eddyz87@gmail.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 65428312

tools/testing/selftests/bpf/prog_tests/verifier.c

+2 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include "verifier_map_ret_val.skel.h"

#include "verifier_masking.skel.h"

#include "verifier_meta_access.skel.h"

#include "verifier_raw_stack.skel.h"



__maybe_unused

static void run_tests_aux(const char *skel_name, skel_elf_bytes_fn elf_bytes_factory)
@@ -78,3 +79,4 @@ void test_verifier_map_ptr(void) { RUN(verifier_map_ptr); } 
void test_verifier_map_ret_val(void)          { RUN(verifier_map_ret_val); }

void test_verifier_masking(void)              { RUN(verifier_masking); }

void test_verifier_meta_access(void)          { RUN(verifier_meta_access); }

void test_verifier_raw_stack(void)            { RUN(verifier_raw_stack); }

tools/testing/selftests/bpf/progs/verifier_raw_stack.c

0 → 100644
+371 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/* Converted from tools/testing/selftests/bpf/verifier/raw_stack.c */



#include <linux/bpf.h>

#include <bpf/bpf_helpers.h>

#include "bpf_misc.h"



SEC("tc")

__description("raw_stack: no skb_load_bytes")

__failure __msg("invalid read from stack R6 off=-8 size=8")

__naked void stack_no_skb_load_bytes(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -8;					\

	r3 = r6;					\

	r4 = 8;						\

	/* Call to skb_load_bytes() omitted. */		\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	::: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, negative len")

__failure __msg("R4 min value is negative")

__naked void skb_load_bytes_negative_len(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -8;					\

	r3 = r6;					\

	r4 = -8;					\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, negative len 2")

__failure __msg("R4 min value is negative")

__naked void load_bytes_negative_len_2(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -8;					\

	r3 = r6;					\

	r4 = %[__imm_0];				\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes),

	  __imm_const(__imm_0, ~0)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, zero len")

__failure __msg("invalid zero-sized read")

__naked void skb_load_bytes_zero_len(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -8;					\

	r3 = r6;					\

	r4 = 0;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, no init")

__success __retval(0)

__naked void skb_load_bytes_no_init(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -8;					\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, init")

__success __retval(0)

__naked void stack_skb_load_bytes_init(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -8;					\

	r3 = 0xcafe;					\

	*(u64*)(r6 + 0) = r3;				\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, spilled regs around bounds")

__success __retval(0)

__naked void bytes_spilled_regs_around_bounds(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -16;					\

	*(u64*)(r6 - 8) = r1;				\

	*(u64*)(r6 + 8) = r1;				\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 - 8);				\

	r2 = *(u64*)(r6 + 8);				\

	r0 = *(u32*)(r0 + %[__sk_buff_mark]);		\

	r2 = *(u32*)(r2 + %[__sk_buff_priority]);	\

	r0 += r2;					\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes),

	  __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),

	  __imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority))

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, spilled regs corruption")

__failure __msg("R0 invalid mem access 'scalar'")

__flag(BPF_F_ANY_ALIGNMENT)

__naked void load_bytes_spilled_regs_corruption(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -8;					\

	*(u64*)(r6 + 0) = r1;				\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	r0 = *(u32*)(r0 + %[__sk_buff_mark]);		\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes),

	  __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark))

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, spilled regs corruption 2")

__failure __msg("R3 invalid mem access 'scalar'")

__flag(BPF_F_ANY_ALIGNMENT)

__naked void bytes_spilled_regs_corruption_2(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -16;					\

	*(u64*)(r6 - 8) = r1;				\

	*(u64*)(r6 + 0) = r1;				\

	*(u64*)(r6 + 8) = r1;				\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 - 8);				\

	r2 = *(u64*)(r6 + 8);				\

	r3 = *(u64*)(r6 + 0);				\

	r0 = *(u32*)(r0 + %[__sk_buff_mark]);		\

	r2 = *(u32*)(r2 + %[__sk_buff_priority]);	\

	r0 += r2;					\

	r3 = *(u32*)(r3 + %[__sk_buff_pkt_type]);	\

	r0 += r3;					\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes),

	  __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),

	  __imm_const(__sk_buff_pkt_type, offsetof(struct __sk_buff, pkt_type)),

	  __imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority))

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, spilled regs + data")

__success __retval(0)

__naked void load_bytes_spilled_regs_data(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -16;					\

	*(u64*)(r6 - 8) = r1;				\

	*(u64*)(r6 + 0) = r1;				\

	*(u64*)(r6 + 8) = r1;				\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 - 8);				\

	r2 = *(u64*)(r6 + 8);				\

	r3 = *(u64*)(r6 + 0);				\

	r0 = *(u32*)(r0 + %[__sk_buff_mark]);		\

	r2 = *(u32*)(r2 + %[__sk_buff_priority]);	\

	r0 += r2;					\

	r0 += r3;					\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes),

	  __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)),

	  __imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority))

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, invalid access 1")

__failure __msg("invalid indirect access to stack R3 off=-513 size=8")

__naked void load_bytes_invalid_access_1(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -513;					\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, invalid access 2")

__failure __msg("invalid indirect access to stack R3 off=-1 size=8")

__naked void load_bytes_invalid_access_2(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -1;					\

	r3 = r6;					\

	r4 = 8;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, invalid access 3")

__failure __msg("R4 min value is negative")

__naked void load_bytes_invalid_access_3(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += 0xffffffff;				\

	r3 = r6;					\

	r4 = 0xffffffff;				\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, invalid access 4")

__failure

__msg("R4 unbounded memory access, use 'var &= const' or 'if (var < const)'")

__naked void load_bytes_invalid_access_4(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -1;					\

	r3 = r6;					\

	r4 = 0x7fffffff;				\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, invalid access 5")

__failure

__msg("R4 unbounded memory access, use 'var &= const' or 'if (var < const)'")

__naked void load_bytes_invalid_access_5(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -512;					\

	r3 = r6;					\

	r4 = 0x7fffffff;				\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, invalid access 6")

__failure __msg("invalid zero-sized read")

__naked void load_bytes_invalid_access_6(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -512;					\

	r3 = r6;					\

	r4 = 0;						\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



SEC("tc")

__description("raw_stack: skb_load_bytes, large access")

__success __retval(0)

__naked void skb_load_bytes_large_access(void)

{

	asm volatile ("					\

	r2 = 4;						\

	r6 = r10;					\

	r6 += -512;					\

	r3 = r6;					\

	r4 = 512;					\

	call %[bpf_skb_load_bytes];			\

	r0 = *(u64*)(r6 + 0);				\

	exit;						\

"	:

	: __imm(bpf_skb_load_bytes)

	: __clobber_all);

}



char _license[] SEC("license") = "GPL";

tools/testing/selftests/bpf/verifier/raw_stack.c

deleted100644 → 0
+0 −305
Original line number Diff line number Diff line 
{

	"raw_stack: no skb_load_bytes",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	/* Call to skb_load_bytes() omitted. */

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "invalid read from stack R6 off=-8 size=8",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, negative len",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, -8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "R4 min value is negative",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, negative len 2",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, ~0),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "R4 min value is negative",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, zero len",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 0),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "invalid zero-sized read",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, no init",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, init",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),

	BPF_ST_MEM(BPF_DW, BPF_REG_6, 0, 0xcafe),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, spilled regs around bounds",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -16),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, -8),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1,  8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, -8),

	BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_6,  8),

	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,

		    offsetof(struct __sk_buff, mark)),

	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_2,

		    offsetof(struct __sk_buff, priority)),

	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),

	BPF_EXIT_INSN(),

	},

	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, spilled regs corruption",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -8),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, 0),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,

		    offsetof(struct __sk_buff, mark)),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "R0 invalid mem access 'scalar'",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

	.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,

},

{

	"raw_stack: skb_load_bytes, spilled regs corruption 2",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -16),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, -8),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1,  0),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1,  8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, -8),

	BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_6,  8),

	BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_6,  0),

	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,

		    offsetof(struct __sk_buff, mark)),

	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_2,

		    offsetof(struct __sk_buff, priority)),

	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),

	BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_3,

		    offsetof(struct __sk_buff, pkt_type)),

	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_3),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "R3 invalid mem access 'scalar'",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

	.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,

},

{

	"raw_stack: skb_load_bytes, spilled regs + data",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -16),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1, -8),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1,  0),

	BPF_STX_MEM(BPF_DW, BPF_REG_6, BPF_REG_1,  8),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, -8),

	BPF_LDX_MEM(BPF_DW, BPF_REG_2, BPF_REG_6,  8),

	BPF_LDX_MEM(BPF_DW, BPF_REG_3, BPF_REG_6,  0),

	BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_0,

		    offsetof(struct __sk_buff, mark)),

	BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_2,

		    offsetof(struct __sk_buff, priority)),

	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),

	BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_3),

	BPF_EXIT_INSN(),

	},

	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, invalid access 1",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -513),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "invalid indirect access to stack R3 off=-513 size=8",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, invalid access 2",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -1),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 8),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "invalid indirect access to stack R3 off=-1 size=8",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, invalid access 3",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, 0xffffffff),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 0xffffffff),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "R4 min value is negative",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, invalid access 4",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -1),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 0x7fffffff),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "R4 unbounded memory access, use 'var &= const' or 'if (var < const)'",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, invalid access 5",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -512),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 0x7fffffff),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "R4 unbounded memory access, use 'var &= const' or 'if (var < const)'",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, invalid access 6",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -512),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 0),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = REJECT,

	.errstr = "invalid zero-sized read",

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},

{

	"raw_stack: skb_load_bytes, large access",

	.insns = {

	BPF_MOV64_IMM(BPF_REG_2, 4),

	BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_10),

	BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, -512),

	BPF_MOV64_REG(BPF_REG_3, BPF_REG_6),

	BPF_MOV64_IMM(BPF_REG_4, 512),

	BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_skb_load_bytes),

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_6, 0),

	BPF_EXIT_INSN(),

	},

	.result = ACCEPT,

	.prog_type = BPF_PROG_TYPE_SCHED_CLS,

},