parasite: Cure task in case any dump failed while infected

Wile the task is infected we cannot just detach from it and go away. The victim will die after this.
So, call the parasite_cure_seized on any error handing between infect and cure.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-dump.c

@@ -1494,43 +1494,43 @@ static int dump_one_task(const struct pstree_item *item)
 	ret = dump_task_files_seized(parasite_ctl, cr_fdset, fds, nr_fds);
 	if (ret) {
 		pr_err("Dump files (pid: %d) failed with %d\n", pid, ret);
-		goto err;
+		goto err_cure;
 	}
 
 	ret = parasite_dump_pages_seized(parasite_ctl, &vma_area_list, cr_fdset);
 	if (ret) {
 		pr_err("Can't dump pages (pid: %d) with parasite\n", pid);
-		goto err;
+		goto err_cure;
 	}
 
 	ret = parasite_dump_sigacts_seized(parasite_ctl, cr_fdset);
 	if (ret) {
 		pr_err("Can't dump sigactions (pid: %d) with parasite\n", pid);
-		goto err;
+		goto err_cure;
 	}
 
 	ret = parasite_dump_itimers_seized(parasite_ctl, cr_fdset);
 	if (ret) {
 		pr_err("Can't dump itimers (pid: %d)\n", pid);
-		goto err;
+		goto err_cure;
 	}
 
 	ret = parasite_dump_misc_seized(parasite_ctl, &misc);
 	if (ret) {
 		pr_err("Can't dump misc (pid: %d)\n", pid);
-		goto err;
+		goto err_cure;
 	}
 
 	ret = dump_task_core_all(pid, &pps_buf, &misc, parasite_ctl, cr_fdset);
 	if (ret) {
 		pr_err("Dump core (pid: %d) failed with %d\n", pid, ret);
-		goto err;
+		goto err_cure;
 	}
 
 	ret = dump_task_threads(parasite_ctl, item);
 	if (ret) {
 		pr_err("Can't dump threads\n");
-		goto err;
+		goto err_cure;
 	}
 
 	ret = parasite_cure_seized(parasite_ctl);
@@ -1564,6 +1564,10 @@ err_free:
 	free_mappings(&vma_area_list);
 	xfree(fds);
 	return ret;
+
+err_cure:
+	parasite_cure_seized(parasite_ctl);
+	goto err;
 }
 
 static int cr_dump_shmem(void)