Commit 26c386ec authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Alexei Starovoitov
Browse files

selftests/bpf: convert dynptr_fail and map_kptr_fail subtests to generic tester 



Convert big chunks of dynptr and map_kptr subtests to use generic
verification_tester. They are switched from using manually maintained
tables of test cases, specifying program name and expected error
verifier message, to btf_decl_tag-based annotations directly on
corresponding BPF programs: __failure to specify that BPF program is
expected to fail verification, and __msg() to specify expected log
message.

Acked-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Acked-by: default avatarKumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20221207201648.2990661-2-andrii@kernel.org


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 537c3f66

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

+3 −77
Original line number Diff line number Diff line
@@ -5,86 +5,16 @@ 
#include "dynptr_fail.skel.h"

#include "dynptr_success.skel.h"



static size_t log_buf_sz = 1048576; /* 1 MB */

static char obj_log_buf[1048576];



static struct {

	const char *prog_name;

	const char *expected_err_msg;

} dynptr_tests[] = {

	/* failure cases */

	{"ringbuf_missing_release1", "Unreleased reference id=1"},

	{"ringbuf_missing_release2", "Unreleased reference id=2"},

	{"ringbuf_missing_release_callback", "Unreleased reference id"},

	{"use_after_invalid", "Expected an initialized dynptr as arg #3"},

	{"ringbuf_invalid_api", "type=mem expected=ringbuf_mem"},

	{"add_dynptr_to_map1", "invalid indirect read from stack"},

	{"add_dynptr_to_map2", "invalid indirect read from stack"},

	{"data_slice_out_of_bounds_ringbuf", "value is outside of the allowed memory range"},

	{"data_slice_out_of_bounds_map_value", "value is outside of the allowed memory range"},

	{"data_slice_use_after_release1", "invalid mem access 'scalar'"},

	{"data_slice_use_after_release2", "invalid mem access 'scalar'"},

	{"data_slice_missing_null_check1", "invalid mem access 'mem_or_null'"},

	{"data_slice_missing_null_check2", "invalid mem access 'mem_or_null'"},

	{"invalid_helper1", "invalid indirect read from stack"},

	{"invalid_helper2", "Expected an initialized dynptr as arg #3"},

	{"invalid_write1", "Expected an initialized dynptr as arg #1"},

	{"invalid_write2", "Expected an initialized dynptr as arg #3"},

	{"invalid_write3", "Expected an initialized dynptr as arg #1"},

	{"invalid_write4", "arg 1 is an unacquired reference"},

	{"invalid_read1", "invalid read from stack"},

	{"invalid_read2", "cannot pass in dynptr at an offset"},

	{"invalid_read3", "invalid read from stack"},

	{"invalid_read4", "invalid read from stack"},

	{"invalid_offset", "invalid write to stack"},

	{"global", "type=map_value expected=fp"},

	{"release_twice", "arg 1 is an unacquired reference"},

	{"release_twice_callback", "arg 1 is an unacquired reference"},

	{"dynptr_from_mem_invalid_api",

		"Unsupported reg type fp for bpf_dynptr_from_mem data"},



	/* success cases */

	{"test_read_write", NULL},

	{"test_data_slice", NULL},

	{"test_ringbuf", NULL},

};



static void verify_fail(const char *prog_name, const char *expected_err_msg)

{

	LIBBPF_OPTS(bpf_object_open_opts, opts);

	struct bpf_program *prog;

	struct dynptr_fail *skel;

	int err;



	opts.kernel_log_buf = obj_log_buf;

	opts.kernel_log_size = log_buf_sz;

	opts.kernel_log_level = 1;



	skel = dynptr_fail__open_opts(&opts);

	if (!ASSERT_OK_PTR(skel, "dynptr_fail__open_opts"))

		goto cleanup;



	prog = bpf_object__find_program_by_name(skel->obj, prog_name);

	if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))

		goto cleanup;



	bpf_program__set_autoload(prog, true);



	bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize());



	err = dynptr_fail__load(skel);

	if (!ASSERT_ERR(err, "unexpected load success"))

		goto cleanup;



	if (!ASSERT_OK_PTR(strstr(obj_log_buf, expected_err_msg), "expected_err_msg")) {

		fprintf(stderr, "Expected err_msg: %s\n", expected_err_msg);

		fprintf(stderr, "Verifier output: %s\n", obj_log_buf);

	}



cleanup:

	dynptr_fail__destroy(skel);

}



static void verify_success(const char *prog_name)

{

	struct dynptr_success *skel;
@@ -97,8 +27,6 @@ static void verify_success(const char *prog_name) 


	skel->bss->pid = getpid();



	bpf_map__set_max_entries(skel->maps.ringbuf, getpagesize());



	dynptr_success__load(skel);

	if (!ASSERT_OK_PTR(skel, "dynptr_success__load"))

		goto cleanup;
@@ -129,10 +57,8 @@ void test_dynptr(void) 
		if (!test__start_subtest(dynptr_tests[i].prog_name))

			continue;



		if (dynptr_tests[i].expected_err_msg)

			verify_fail(dynptr_tests[i].prog_name,

				    dynptr_tests[i].expected_err_msg);

		else

		verify_success(dynptr_tests[i].prog_name);

	}



	RUN_TESTS(dynptr_fail);

}

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

+2 −78
Original line number Diff line number Diff line
@@ -5,83 +5,6 @@ 
#include "map_kptr.skel.h"

#include "map_kptr_fail.skel.h"



static char log_buf[1024 * 1024];



struct {

	const char *prog_name;

	const char *err_msg;

} map_kptr_fail_tests[] = {

	{ "size_not_bpf_dw", "kptr access size must be BPF_DW" },

	{ "non_const_var_off", "kptr access cannot have variable offset" },

	{ "non_const_var_off_kptr_xchg", "R1 doesn't have constant offset. kptr has to be" },

	{ "misaligned_access_write", "kptr access misaligned expected=8 off=7" },

	{ "misaligned_access_read", "kptr access misaligned expected=8 off=1" },

	{ "reject_var_off_store", "variable untrusted_ptr_ access var_off=(0x0; 0x1e0)" },

	{ "reject_bad_type_match", "invalid kptr access, R1 type=untrusted_ptr_prog_test_ref_kfunc" },

	{ "marked_as_untrusted_or_null", "R1 type=untrusted_ptr_or_null_ expected=percpu_ptr_" },

	{ "correct_btf_id_check_size", "access beyond struct prog_test_ref_kfunc at off 32 size 4" },

	{ "inherit_untrusted_on_walk", "R1 type=untrusted_ptr_ expected=percpu_ptr_" },

	{ "reject_kptr_xchg_on_unref", "off=8 kptr isn't referenced kptr" },

	{ "reject_kptr_get_no_map_val", "arg#0 expected pointer to map value" },

	{ "reject_kptr_get_no_null_map_val", "arg#0 expected pointer to map value" },

	{ "reject_kptr_get_no_kptr", "arg#0 no referenced kptr at map value offset=0" },

	{ "reject_kptr_get_on_unref", "arg#0 no referenced kptr at map value offset=8" },

	{ "reject_kptr_get_bad_type_match", "kernel function bpf_kfunc_call_test_kptr_get args#0" },

	{ "mark_ref_as_untrusted_or_null", "R1 type=untrusted_ptr_or_null_ expected=percpu_ptr_" },

	{ "reject_untrusted_store_to_ref", "store to referenced kptr disallowed" },

	{ "reject_bad_type_xchg", "invalid kptr access, R2 type=ptr_prog_test_ref_kfunc expected=ptr_prog_test_member" },

	{ "reject_untrusted_xchg", "R2 type=untrusted_ptr_ expected=ptr_" },

	{ "reject_member_of_ref_xchg", "invalid kptr access, R2 type=ptr_prog_test_ref_kfunc" },

	{ "reject_indirect_helper_access", "kptr cannot be accessed indirectly by helper" },

	{ "reject_indirect_global_func_access", "kptr cannot be accessed indirectly by helper" },

	{ "kptr_xchg_ref_state", "Unreleased reference id=5 alloc_insn=" },

	{ "kptr_get_ref_state", "Unreleased reference id=3 alloc_insn=" },

};



static void test_map_kptr_fail_prog(const char *prog_name, const char *err_msg)

{

	LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf,

						.kernel_log_size = sizeof(log_buf),

						.kernel_log_level = 1);

	struct map_kptr_fail *skel;

	struct bpf_program *prog;

	int ret;



	skel = map_kptr_fail__open_opts(&opts);

	if (!ASSERT_OK_PTR(skel, "map_kptr_fail__open_opts"))

		return;



	prog = bpf_object__find_program_by_name(skel->obj, prog_name);

	if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))

		goto end;



	bpf_program__set_autoload(prog, true);



	ret = map_kptr_fail__load(skel);

	if (!ASSERT_ERR(ret, "map_kptr__load must fail"))

		goto end;



	if (!ASSERT_OK_PTR(strstr(log_buf, err_msg), "expected error message")) {

		fprintf(stderr, "Expected: %s\n", err_msg);

		fprintf(stderr, "Verifier: %s\n", log_buf);

	}



end:

	map_kptr_fail__destroy(skel);

}



static void test_map_kptr_fail(void)

{

	int i;



	for (i = 0; i < ARRAY_SIZE(map_kptr_fail_tests); i++) {

		if (!test__start_subtest(map_kptr_fail_tests[i].prog_name))

			continue;

		test_map_kptr_fail_prog(map_kptr_fail_tests[i].prog_name,

					map_kptr_fail_tests[i].err_msg);

	}

}



static void test_map_kptr_success(bool test_run)

{

	LIBBPF_OPTS(bpf_test_run_opts, opts,
@@ -145,5 +68,6 @@ void test_map_kptr(void) 
		 */

		test_map_kptr_success(true);

	}

	test_map_kptr_fail();



	RUN_TESTS(map_kptr_fail);

}

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

+31 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ struct sample { 


struct {

	__uint(type, BPF_MAP_TYPE_RINGBUF);

	__uint(max_entries, 4096);

} ringbuf SEC(".maps");



int err, val;
@@ -66,6 +67,7 @@ static int get_map_val_dynptr(struct bpf_dynptr *ptr) 
 * bpf_ringbuf_submit/discard_dynptr call

 */

SEC("?raw_tp")

__failure __msg("Unreleased reference id=1")

int ringbuf_missing_release1(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -78,6 +80,7 @@ int ringbuf_missing_release1(void *ctx) 
}



SEC("?raw_tp")

__failure __msg("Unreleased reference id=2")

int ringbuf_missing_release2(void *ctx)

{

	struct bpf_dynptr ptr1, ptr2;
@@ -113,6 +116,7 @@ static int missing_release_callback_fn(__u32 index, void *data) 


/* Any dynptr initialized within a callback must have bpf_dynptr_put called */

SEC("?raw_tp")

__failure __msg("Unreleased reference id")

int ringbuf_missing_release_callback(void *ctx)

{

	bpf_loop(10, missing_release_callback_fn, NULL, 0);
@@ -121,6 +125,7 @@ int ringbuf_missing_release_callback(void *ctx) 


/* Can't call bpf_ringbuf_submit/discard_dynptr on a non-initialized dynptr */

SEC("?raw_tp")

__failure __msg("arg 1 is an unacquired reference")

int ringbuf_release_uninit_dynptr(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -133,6 +138,7 @@ int ringbuf_release_uninit_dynptr(void *ctx) 


/* A dynptr can't be used after it has been invalidated */

SEC("?raw_tp")

__failure __msg("Expected an initialized dynptr as arg #3")

int use_after_invalid(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -152,6 +158,7 @@ int use_after_invalid(void *ctx) 


/* Can't call non-dynptr ringbuf APIs on a dynptr ringbuf sample */

SEC("?raw_tp")

__failure __msg("type=mem expected=ringbuf_mem")

int ringbuf_invalid_api(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -174,6 +181,7 @@ int ringbuf_invalid_api(void *ctx) 


/* Can't add a dynptr to a map */

SEC("?raw_tp")

__failure __msg("invalid indirect read from stack")

int add_dynptr_to_map1(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -191,6 +199,7 @@ int add_dynptr_to_map1(void *ctx) 


/* Can't add a struct with an embedded dynptr to a map */

SEC("?raw_tp")

__failure __msg("invalid indirect read from stack")

int add_dynptr_to_map2(void *ctx)

{

	struct test_info x;
@@ -208,6 +217,7 @@ int add_dynptr_to_map2(void *ctx) 


/* A data slice can't be accessed out of bounds */

SEC("?raw_tp")

__failure __msg("value is outside of the allowed memory range")

int data_slice_out_of_bounds_ringbuf(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -228,6 +238,7 @@ int data_slice_out_of_bounds_ringbuf(void *ctx) 
}



SEC("?raw_tp")

__failure __msg("value is outside of the allowed memory range")

int data_slice_out_of_bounds_map_value(void *ctx)

{

	__u32 key = 0, map_val;
@@ -248,6 +259,7 @@ int data_slice_out_of_bounds_map_value(void *ctx) 


/* A data slice can't be used after it has been released */

SEC("?raw_tp")

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

int data_slice_use_after_release1(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -279,6 +291,7 @@ int data_slice_use_after_release1(void *ctx) 
 * ptr2 is at fp - 16).

 */

SEC("?raw_tp")

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

int data_slice_use_after_release2(void *ctx)

{

	struct bpf_dynptr ptr1, ptr2;
@@ -310,6 +323,7 @@ int data_slice_use_after_release2(void *ctx) 


/* A data slice must be first checked for NULL */

SEC("?raw_tp")

__failure __msg("invalid mem access 'mem_or_null'")

int data_slice_missing_null_check1(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -330,6 +344,7 @@ int data_slice_missing_null_check1(void *ctx) 


/* A data slice can't be dereferenced if it wasn't checked for null */

SEC("?raw_tp")

__failure __msg("invalid mem access 'mem_or_null'")

int data_slice_missing_null_check2(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -352,6 +367,7 @@ int data_slice_missing_null_check2(void *ctx) 
 * dynptr argument

 */

SEC("?raw_tp")

__failure __msg("invalid indirect read from stack")

int invalid_helper1(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -366,6 +382,7 @@ int invalid_helper1(void *ctx) 


/* A dynptr can't be passed into a helper function at a non-zero offset */

SEC("?raw_tp")

__failure __msg("Expected an initialized dynptr as arg #3")

int invalid_helper2(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -381,6 +398,7 @@ int invalid_helper2(void *ctx) 


/* A bpf_dynptr is invalidated if it's been written into */

SEC("?raw_tp")

__failure __msg("Expected an initialized dynptr as arg #1")

int invalid_write1(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -402,6 +420,7 @@ int invalid_write1(void *ctx) 
 * offset

 */

SEC("?raw_tp")

__failure __msg("Expected an initialized dynptr as arg #3")

int invalid_write2(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -425,6 +444,7 @@ int invalid_write2(void *ctx) 
 * non-const offset

 */

SEC("?raw_tp")

__failure __msg("Expected an initialized dynptr as arg #1")

int invalid_write3(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -456,6 +476,7 @@ static int invalid_write4_callback(__u32 index, void *data) 
 * be invalidated as a dynptr

 */

SEC("?raw_tp")

__failure __msg("arg 1 is an unacquired reference")

int invalid_write4(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -472,7 +493,9 @@ int invalid_write4(void *ctx) 


/* A globally-defined bpf_dynptr can't be used (it must reside as a stack frame) */

struct bpf_dynptr global_dynptr;



SEC("?raw_tp")

__failure __msg("type=map_value expected=fp")

int global(void *ctx)

{

	/* this should fail */
@@ -485,6 +508,7 @@ int global(void *ctx) 


/* A direct read should fail */

SEC("?raw_tp")

__failure __msg("invalid read from stack")

int invalid_read1(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -501,6 +525,7 @@ int invalid_read1(void *ctx) 


/* A direct read at an offset should fail */

SEC("?raw_tp")

__failure __msg("cannot pass in dynptr at an offset")

int invalid_read2(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -516,6 +541,7 @@ int invalid_read2(void *ctx) 


/* A direct read at an offset into the lower stack slot should fail */

SEC("?raw_tp")

__failure __msg("invalid read from stack")

int invalid_read3(void *ctx)

{

	struct bpf_dynptr ptr1, ptr2;
@@ -542,6 +568,7 @@ static int invalid_read4_callback(__u32 index, void *data) 


/* A direct read within a callback function should fail */

SEC("?raw_tp")

__failure __msg("invalid read from stack")

int invalid_read4(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -557,6 +584,7 @@ int invalid_read4(void *ctx) 


/* Initializing a dynptr on an offset should fail */

SEC("?raw_tp")

__failure __msg("invalid write to stack")

int invalid_offset(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -571,6 +599,7 @@ int invalid_offset(void *ctx) 


/* Can't release a dynptr twice */

SEC("?raw_tp")

__failure __msg("arg 1 is an unacquired reference")

int release_twice(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -597,6 +626,7 @@ static int release_twice_callback_fn(__u32 index, void *data) 
 * within a calback function, fails

 */

SEC("?raw_tp")

__failure __msg("arg 1 is an unacquired reference")

int release_twice_callback(void *ctx)

{

	struct bpf_dynptr ptr;
@@ -612,6 +642,7 @@ int release_twice_callback(void *ctx) 


/* Reject unsupported local mem types for dynptr_from_mem API */

SEC("?raw_tp")

__failure __msg("Unsupported reg type fp for bpf_dynptr_from_mem data")

int dynptr_from_mem_invalid_api(void *ctx)

{

	struct bpf_dynptr ptr;

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

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ struct sample { 


struct {

	__uint(type, BPF_MAP_TYPE_RINGBUF);

	__uint(max_entries, 4096);

} ringbuf SEC(".maps");



struct {

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

+27 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
#include <bpf/bpf_tracing.h>

#include <bpf/bpf_helpers.h>

#include <bpf/bpf_core_read.h>

#include "bpf_misc.h"



struct map_value {

	char buf[8];
@@ -23,6 +24,7 @@ extern struct prog_test_ref_kfunc * 
bpf_kfunc_call_test_kptr_get(struct prog_test_ref_kfunc **p, int a, int b) __ksym;



SEC("?tc")

__failure __msg("kptr access size must be BPF_DW")

int size_not_bpf_dw(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -37,6 +39,7 @@ int size_not_bpf_dw(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("kptr access cannot have variable offset")

int non_const_var_off(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -55,6 +58,7 @@ int non_const_var_off(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("R1 doesn't have constant offset. kptr has to be")

int non_const_var_off_kptr_xchg(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -73,6 +77,7 @@ int non_const_var_off_kptr_xchg(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("kptr access misaligned expected=8 off=7")

int misaligned_access_write(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -88,6 +93,7 @@ int misaligned_access_write(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("kptr access misaligned expected=8 off=1")

int misaligned_access_read(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -101,6 +107,7 @@ int misaligned_access_read(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("variable untrusted_ptr_ access var_off=(0x0; 0x1e0)")

int reject_var_off_store(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *unref_ptr;
@@ -124,6 +131,7 @@ int reject_var_off_store(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("invalid kptr access, R1 type=untrusted_ptr_prog_test_ref_kfunc")

int reject_bad_type_match(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *unref_ptr;
@@ -144,6 +152,7 @@ int reject_bad_type_match(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("R1 type=untrusted_ptr_or_null_ expected=percpu_ptr_")

int marked_as_untrusted_or_null(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -158,6 +167,7 @@ int marked_as_untrusted_or_null(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("access beyond struct prog_test_ref_kfunc at off 32 size 4")

int correct_btf_id_check_size(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *p;
@@ -175,6 +185,7 @@ int correct_btf_id_check_size(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("R1 type=untrusted_ptr_ expected=percpu_ptr_")

int inherit_untrusted_on_walk(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *unref_ptr;
@@ -194,6 +205,7 @@ int inherit_untrusted_on_walk(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("off=8 kptr isn't referenced kptr")

int reject_kptr_xchg_on_unref(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -208,6 +220,7 @@ int reject_kptr_xchg_on_unref(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("arg#0 expected pointer to map value")

int reject_kptr_get_no_map_val(struct __sk_buff *ctx)

{

	bpf_kfunc_call_test_kptr_get((void *)&ctx, 0, 0);
@@ -215,6 +228,7 @@ int reject_kptr_get_no_map_val(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("arg#0 expected pointer to map value")

int reject_kptr_get_no_null_map_val(struct __sk_buff *ctx)

{

	bpf_kfunc_call_test_kptr_get(bpf_map_lookup_elem(&array_map, &(int){0}), 0, 0);
@@ -222,6 +236,7 @@ int reject_kptr_get_no_null_map_val(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("arg#0 no referenced kptr at map value offset=0")

int reject_kptr_get_no_kptr(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -236,6 +251,7 @@ int reject_kptr_get_no_kptr(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("arg#0 no referenced kptr at map value offset=8")

int reject_kptr_get_on_unref(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -250,6 +266,7 @@ int reject_kptr_get_on_unref(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("kernel function bpf_kfunc_call_test_kptr_get args#0")

int reject_kptr_get_bad_type_match(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -264,6 +281,7 @@ int reject_kptr_get_bad_type_match(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("R1 type=untrusted_ptr_or_null_ expected=percpu_ptr_")

int mark_ref_as_untrusted_or_null(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -278,6 +296,7 @@ int mark_ref_as_untrusted_or_null(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("store to referenced kptr disallowed")

int reject_untrusted_store_to_ref(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *p;
@@ -297,6 +316,7 @@ int reject_untrusted_store_to_ref(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("R2 type=untrusted_ptr_ expected=ptr_")

int reject_untrusted_xchg(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *p;
@@ -315,6 +335,8 @@ int reject_untrusted_xchg(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure

__msg("invalid kptr access, R2 type=ptr_prog_test_ref_kfunc expected=ptr_prog_test_member")

int reject_bad_type_xchg(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *ref_ptr;
@@ -333,6 +355,7 @@ int reject_bad_type_xchg(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("invalid kptr access, R2 type=ptr_prog_test_ref_kfunc")

int reject_member_of_ref_xchg(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *ref_ptr;
@@ -351,6 +374,7 @@ int reject_member_of_ref_xchg(struct __sk_buff *ctx) 
}



SEC("?syscall")

__failure __msg("kptr cannot be accessed indirectly by helper")

int reject_indirect_helper_access(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -371,6 +395,7 @@ int write_func(int *p) 
}



SEC("?tc")

__failure __msg("kptr cannot be accessed indirectly by helper")

int reject_indirect_global_func_access(struct __sk_buff *ctx)

{

	struct map_value *v;
@@ -384,6 +409,7 @@ int reject_indirect_global_func_access(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("Unreleased reference id=5 alloc_insn=")

int kptr_xchg_ref_state(struct __sk_buff *ctx)

{

	struct prog_test_ref_kfunc *p;
@@ -402,6 +428,7 @@ int kptr_xchg_ref_state(struct __sk_buff *ctx) 
}



SEC("?tc")

__failure __msg("Unreleased reference id=3 alloc_insn=")

int kptr_get_ref_state(struct __sk_buff *ctx)

{

	struct map_value *v;