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-rw-r--r--kernel/fork.c5
-rw-r--r--kernel/pid.c15
2 files changed, 11 insertions, 9 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index f2c1e73..d778016 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1403,10 +1403,11 @@ static struct task_struct *copy_process(unsigned long clone_flags,
goto bad_fork_cleanup_io;
if (pid != &init_struct_pid) {
- retval = -ENOMEM;
pid = alloc_pid(p->nsproxy->pid_ns_for_children);
- if (!pid)
+ if (IS_ERR(pid)) {
+ retval = PTR_ERR(pid);
goto bad_fork_cleanup_io;
+ }
}
p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? child_tidptr : NULL;
diff --git a/kernel/pid.c b/kernel/pid.c
index cd36a5e..4fd07d5 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -182,7 +182,7 @@ static int alloc_pidmap(struct pid_namespace *pid_ns)
spin_unlock_irq(&pidmap_lock);
kfree(page);
if (unlikely(!map->page))
- break;
+ return -ENOMEM;
}
if (likely(atomic_read(&map->nr_free))) {
for ( ; ; ) {
@@ -210,7 +210,7 @@ static int alloc_pidmap(struct pid_namespace *pid_ns)
}
pid = mk_pid(pid_ns, map, offset);
}
- return -1;
+ return -EAGAIN;
}
int next_pidmap(struct pid_namespace *pid_ns, unsigned int last)
@@ -301,17 +301,20 @@ struct pid *alloc_pid(struct pid_namespace *ns)
int i, nr;
struct pid_namespace *tmp;
struct upid *upid;
+ int retval = -ENOMEM;
pid = kmem_cache_alloc(ns->pid_cachep, GFP_KERNEL);
if (!pid)
- goto out;
+ return ERR_PTR(retval);
tmp = ns;
pid->level = ns->level;
for (i = ns->level; i >= 0; i--) {
nr = alloc_pidmap(tmp);
- if (nr < 0)
+ if (IS_ERR_VALUE(nr)) {
+ retval = nr;
goto out_free;
+ }
pid->numbers[i].nr = nr;
pid->numbers[i].ns = tmp;
@@ -339,7 +342,6 @@ struct pid *alloc_pid(struct pid_namespace *ns)
}
spin_unlock_irq(&pidmap_lock);
-out:
return pid;
out_unlock:
@@ -351,8 +353,7 @@ out_free:
free_pidmap(pid->numbers + i);
kmem_cache_free(ns->pid_cachep, pid);
- pid = NULL;
- goto out;
+ return ERR_PTR(retval);
}
void disable_pid_allocation(struct pid_namespace *ns)
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