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-rw-r--r--mm/oom_kill.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index d503e9ce1c7b..f82dd13cca68 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -643,8 +643,12 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
* If current has a pending SIGKILL or is exiting, then automatically
* select it. The goal is to allow it to allocate so that it may
* quickly exit and free its memory.
+ *
+ * But don't select if current has already released its mm and cleared
+ * TIF_MEMDIE flag at exit_mm(), otherwise an OOM livelock may occur.
*/
- if (fatal_signal_pending(current) || task_will_free_mem(current)) {
+ if (current->mm &&
+ (fatal_signal_pending(current) || task_will_free_mem(current))) {
set_thread_flag(TIF_MEMDIE);
return;
}