40 lines
868 B
C
40 lines
868 B
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/* Copyright (c) 2021 Facebook */
|
||
|
|
#include <vmlinux.h>
|
||
|
|
#include <bpf/bpf_helpers.h>
|
||
|
|
|
||
|
|
extern void bpf_kfunc_call_test_mem_len_pass1(void *mem, int len) __ksym;
|
||
|
|
|
||
|
|
struct syscall_test_args {
|
||
|
|
__u8 data[16];
|
||
|
|
size_t size;
|
||
|
|
};
|
||
|
|
|
||
|
|
SEC("?syscall")
|
||
|
|
int kfunc_syscall_test_fail(struct syscall_test_args *args)
|
||
|
|
{
|
||
|
|
bpf_kfunc_call_test_mem_len_pass1(&args->data, sizeof(*args) + 1);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SEC("?syscall")
|
||
|
|
int kfunc_syscall_test_null_fail(struct syscall_test_args *args)
|
||
|
|
{
|
||
|
|
/* Must be called with args as a NULL pointer
|
||
|
|
* we do not check for it to have the verifier consider that
|
||
|
|
* the pointer might not be null, and so we can load it.
|
||
|
|
*
|
||
|
|
* So the following can not be added:
|
||
|
|
*
|
||
|
|
* if (args)
|
||
|
|
* return -22;
|
||
|
|
*/
|
||
|
|
|
||
|
|
bpf_kfunc_call_test_mem_len_pass1(args, sizeof(*args));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
char _license[] SEC("license") = "GPL";
|