You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.1 KiB
49 lines
1.1 KiB
#include <stdio.h> |
|
#include <linux/bpf.h> |
|
#include <unistd.h> |
|
#include <linux/filter.h> |
|
#include <linux/seccomp.h> |
|
#include <sys/prctl.h> |
|
#include "libbpf.h" |
|
#include "bpf_load.h" |
|
#include <sys/resource.h> |
|
|
|
/* install fake seccomp program to enable seccomp code path inside the kernel, |
|
* so that our kprobe attached to seccomp_phase1() can be triggered |
|
*/ |
|
static void install_accept_all_seccomp(void) |
|
{ |
|
struct sock_filter filter[] = { |
|
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW), |
|
}; |
|
struct sock_fprog prog = { |
|
.len = (unsigned short)(sizeof(filter)/sizeof(filter[0])), |
|
.filter = filter, |
|
}; |
|
if (prctl(PR_SET_SECCOMP, 2, &prog)) |
|
perror("prctl"); |
|
} |
|
|
|
int main(int ac, char **argv) |
|
{ |
|
FILE *f; |
|
char filename[256]; |
|
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; |
|
|
|
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); |
|
setrlimit(RLIMIT_MEMLOCK, &r); |
|
|
|
if (load_bpf_file(filename)) { |
|
printf("%s", bpf_log_buf); |
|
return 1; |
|
} |
|
|
|
install_accept_all_seccomp(); |
|
|
|
f = popen("dd if=/dev/zero of=/dev/null count=5", "r"); |
|
(void) f; |
|
|
|
read_trace_pipe(); |
|
|
|
return 0; |
|
}
|
|
|