parasite_infect_seized(): use open_proc_rw()

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

parasite-syscall.c

@@ -564,7 +564,6 @@ struct parasite_ctl *parasite_infect_seized(pid_t pid, int pid_dir, struct list_
 {
 	struct parasite_ctl *ctl = NULL;
 	struct vma_area *vma_area;
-	char fname[128];
 	int ret, fd;
 
 	/*
@@ -621,9 +620,8 @@ struct parasite_ctl *parasite_infect_seized(pid_t pid, int pid_dir, struct list_
 
 	ctl->map_length = round_up(parasite_size, PAGE_SIZE);
 
-	snprintf(fname, sizeof(fname), "map_files/%p-%p",
+	fd = open_proc_rw(pid_dir, "map_files/%p-%p",
 		 ctl->remote_map, ctl->remote_map + ctl->map_length);
-	fd = openat(pid_dir, fname, O_RDWR);
 	if (fd < 0) {
 		pr_perror("Can't open remote parasite map");
 		goto err_restore;