Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[safe/jmp/linux-2.6] / kernel / futex_compat.c

diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 3254d4e..d607a5b 100644 (file)
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -135,7 +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;
-       uid_t euid = current_euid();
+       const struct cred *cred = current_cred(), *pcred;
 
        if (!futex_cmpxchg_enabled)
                return -ENOSYS;
@@ -151,8 +151,10 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
                if (!p)
                        goto err_unlock;
                ret = -EPERM;
-               if (euid != p->euid && 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);