pidns: fix vfork() after unshare(CLONE_NEWPID)

[firefly-linux-kernel-4.4.55.git] / kernel / cpuset.c

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 64b3f791bbe595905b00e9cf8ecbee763cbacf7d..6948e9476b4242a95e86981d182e3d1928b68c11 100644 (file)
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1502,11 +1502,13 @@ static int cpuset_write_u64(struct cgroup *cgrp, struct cftype *cft, u64 val)
 {
        struct cpuset *cs = cgroup_cs(cgrp);
        cpuset_filetype_t type = cft->private;
-       int retval = -ENODEV;
+       int retval = 0;
 
        mutex_lock(&cpuset_mutex);
-       if (!is_cpuset_online(cs))
+       if (!is_cpuset_online(cs)) {
+               retval = -ENODEV;
                goto out_unlock;
+       }
 
        switch (type) {
        case FILE_CPU_EXCLUSIVE: