fix regression in "epoll: Keep a reference on files added to the check list"

[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / fs / eventpoll.c

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index e6fd4b9874a39ad9e96e1b7c2a84d9d9abb40ba4..a10c6081e48fd953c5a86731c6047c5e8dcb96bf 100644 (file)
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1903,9 +1903,9 @@ static int ep_loop_check_proc(void *priv, void *cookie, int call_nests)
                         * during ep_insert().
                         */
                        if (list_empty(&epi->ffd.file->f_tfile_llink)) {
-                               get_file(epi->ffd.file);
-                               list_add(&epi->ffd.file->f_tfile_llink,
-                                        &tfile_check_list);
+                               if (get_file_rcu(epi->ffd.file))
+                                       list_add(&epi->ffd.file->f_tfile_llink,
+                                                &tfile_check_list);
                        }
                }
        }