diff options
Diffstat (limited to 'samples/bpf/tracex5_kern.c')
| -rw-r--r-- | samples/bpf/tracex5_kern.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/samples/bpf/tracex5_kern.c b/samples/bpf/tracex5_kern.c index f95f232cbab9..fd12d7154d42 100644 --- a/samples/bpf/tracex5_kern.c +++ b/samples/bpf/tracex5_kern.c @@ -19,20 +19,18 @@ struct bpf_map_def SEC("maps") progs = { .max_entries = 1024, }; -SEC("kprobe/seccomp_phase1") +SEC("kprobe/__seccomp_filter") int bpf_prog1(struct pt_regs *ctx) { - struct seccomp_data sd; - - bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx)); + int sc_nr = (int)PT_REGS_PARM1(ctx); /* dispatch into next BPF program depending on syscall number */ - bpf_tail_call(ctx, &progs, sd.nr); + bpf_tail_call(ctx, &progs, sc_nr); /* fall through -> unknown syscall */ - if (sd.nr >= __NR_getuid && sd.nr <= __NR_getsid) { + if (sc_nr >= __NR_getuid && sc_nr <= __NR_getsid) { char fmt[] = "syscall=%d (one of get/set uid/pid/gid)\n"; - bpf_trace_printk(fmt, sizeof(fmt), sd.nr); + bpf_trace_printk(fmt, sizeof(fmt), sc_nr); } return 0; } @@ -42,7 +40,7 @@ PROG(__NR_write)(struct pt_regs *ctx) { struct seccomp_data sd; - bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx)); + bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx)); if (sd.args[2] == 512) { char fmt[] = "write(fd=%d, buf=%p, size=%d)\n"; bpf_trace_printk(fmt, sizeof(fmt), @@ -55,7 +53,7 @@ PROG(__NR_read)(struct pt_regs *ctx) { struct seccomp_data sd; - bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM1(ctx)); + bpf_probe_read(&sd, sizeof(sd), (void *)PT_REGS_PARM2(ctx)); if (sd.args[2] > 128 && sd.args[2] <= 1024) { char fmt[] = "read(fd=%d, buf=%p, size=%d)\n"; bpf_trace_printk(fmt, sizeof(fmt), |
