1 files changed, 8 insertions, 2 deletions

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index ec8118ab2a47..1599157336a6 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -215,8 +215,12 @@ ok:
         smp_rmb();
         if (task->mm)
                 dumpable = get_dumpable(task->mm);
-        if (!dumpable  && !ptrace_has_cap(task_user_ns(task), mode))
+        rcu_read_lock();
+        if (!dumpable && !ptrace_has_cap(__task_cred(task)->user_ns, mode)) {
+                rcu_read_unlock();
                 return -EPERM;
+        }
+        rcu_read_unlock();
 
         return security_ptrace_access_check(task, mode);
 }
@@ -280,8 +284,10 @@ static int ptrace_attach(struct task_struct *task, long request,
 
         if (seize)
                 flags |= PT_SEIZED;
-        if (ns_capable(task_user_ns(task), CAP_SYS_PTRACE))
+        rcu_read_lock();
+        if (ns_capable(__task_cred(task)->user_ns, CAP_SYS_PTRACE))
                 flags |= PT_PTRACE_CAP;
+        rcu_read_unlock();
         task->ptrace = flags;
 
         __ptrace_link(task, current);