1 files changed, 5 insertions, 2 deletions

diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 04ac3a9e42cf..d607a5b9ee29 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -135,6 +135,7 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 {
         struct compat_robust_list_head __user *head;
         unsigned long ret;
+        const struct cred *cred = current_cred(), *pcred;
 
         if (!futex_cmpxchg_enabled)
                 return -ENOSYS;
@@ -150,8 +151,10 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
                 if (!p)
                         goto err_unlock;
                 ret = -EPERM;
-                if ((current->euid != p->euid) && (current->euid != p->uid) &&
-                                !capable(CAP_SYS_PTRACE))
+                pcred = __task_cred(p);
+                if (cred->euid != pcred->euid &&
+                    cred->euid != pcred->uid &&
+                    !capable(CAP_SYS_PTRACE))
                         goto err_unlock;
                 head = p->compat_robust_list;
                 read_unlock(&tasklist_lock);