restart: unshare mounts ns when unsharing pidns (for --pidns)

NOTE - this is against Suka's latest user-cr patchset. Without this patch, the cr_tests/simple testcase ends up remounting /proc at restart without having unshared mounts. Therefore, after running the testcase no tasks show up in /proc.

With this patch on top of Suka's user-cr patchset, all cr_tests pass.

Signed-off-by Serge Hallyn <serue-r/[email protected]>

---
 restart.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

restart.c +1 -1

index 484668a..677033d 100644
@@ -554,7 +554,7 @@ int app_restart(struct app_restart_args *args)
 		ret = ckpt_coordinator_pidns(&ctx);
 	} else if (ctx.args->pidns) {
 		ckpt_dbg("new pidns with init\n");
-		ctx.tasks_arr[0].flags |= TASK_NEWPID;
+		ctx.tasks_arr[0].flags |= TASK_NEWPID | TASK_NEWNS;
 		if (global_send_sigint == -1)
 			global_send_sigint = SIGKILL;
 		ret = ckpt_coordinator(&ctx);