criu.diff

diff --git a/compel/src/lib/infect.c b/compel/src/lib/infect.c
index ecc6599..1c60951 100644
--- a/compel/src/lib/infect.c
+++ b/compel/src/lib/infect.c
@@ -115,6 +115,13 @@ int compel_interrupt_task(int pid)
 {
        int ret;
 
+  ret = ptrace(PTRACE_DETACH, pid, NULL,0);
+  if (ret) {
+               pr_warn("detached failed : %d (%s)\n", pid, strerror(errno));
+  } else {
+               pr_warn("already attached, detached: %d\n", pid);
+  }
+
        ret = ptrace(PTRACE_SEIZE, pid, NULL, 0);
        if (ret) {
                /*
diff --git a/criu/cr-dump.c b/criu/cr-dump.c
index 7ceff4c..b5373ba 100644
--- a/criu/cr-dump.c
+++ b/criu/cr-dump.c
@@ -728,7 +728,6 @@ static int dump_task_core_all(struct parasite_ctl *ctl,
        CoreEntry *core = item->core[0];
        pid_t pid = item->pid->real;
        int ret = -1;
-       struct proc_status_creds *creds;
        struct parasite_dump_cgroup_args cgroup_args, *info = NULL;
 
        BUILD_BUG_ON(sizeof(cgroup_args) < PARASITE_ARG_SIZE_MIN);
@@ -741,18 +740,6 @@ static int dump_task_core_all(struct parasite_ctl *ctl,
        if (ret < 0)
                goto err;
 
-       creds = dmpi(item)->pi_creds;
-       if (creds->s.seccomp_mode != SECCOMP_MODE_DISABLED) {
-               pr_info("got seccomp mode %d for %d\n", creds->s.seccomp_mode, vpid(item));
-               core->tc->has_seccomp_mode = true;
-               core->tc->seccomp_mode = creds->s.seccomp_mode;
-
-               if (creds->s.seccomp_mode == SECCOMP_MODE_FILTER) {
-                       core->tc->has_seccomp_filter = true;
-                       core->tc->seccomp_filter = creds->last_filter;
-               }
-       }
-
        strlcpy((char *)core->tc->comm, stat->comm, TASK_COMM_LEN);
        core->tc->flags = stat->flags;
        core->tc->task_state = item->pid->state;

mruby-seccomp.diff

diff --git a/src/tracing.c b/src/tracing.c
index 51cc0ab..2db0bb2 100644
--- a/src/tracing.c
+++ b/src/tracing.c
@@ -74,6 +74,8 @@ static int mrb_seccomp_on_tracer_trap(mrb_state *mrb, mrb_value hook,
     mrb_sys_fail(mrb, "ptrace(PTRACE_GETREGS...");
   }
 
+  ptrace(PTRACE_DETACH, child, NULL, NULL);
+
   mrb_value args[3];
   args[0] = mrb_fixnum_value((int)regs.orig_rax); // syscall no
   args[1] = mrb_fixnum_value((int)child);         // pid
@@ -148,6 +150,7 @@ static mrb_value mrb_seccomp_start_ptrace(mrb_state *mrb, mrb_value self) {
           if (mrb_seccomp_on_tracer_trap(mrb, hook, child) < 0) {
             mrb_raise(mrb, E_RUNTIME_ERROR, "Something is wrong in trap event");
           }
+          return self;
         }
       }
     } else if (WIFCONTINUED(status)) {