[PATCH v6 3/7] pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid

[Adrian Reber]

Use the newly introduced capability CAP_CHECKPOINT_RESTORE to allow
writing to ns_last_pid.

Signed-off-by: Adrian Reber <are...@redhat.com>
Signed-off-by: Nicolas Viennot <nicolas.vien...@twosigma.com>
Acked-by: Christian Brauner <christian.brau...@ubuntu.com>
Reviewed-by: Serge Hallyn <se...@hallyn.com>
---
 kernel/pid_namespace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 0e5ac162c3a8..ac135bd600eb 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -269,7 +269,7 @@ static int pid_ns_ctl_handler(struct ctl_table *table, int 
write,
        struct ctl_table tmp = *table;
        int ret, next;
 
-       if (write && !ns_capable(pid_ns->user_ns, CAP_SYS_ADMIN))
+       if (write && !checkpoint_restore_ns_capable(pid_ns->user_ns))
                return -EPERM;
 
        /*
-- 
2.26.2