From: Qi Zheng zhengqi.arch@bytedance.com
commit adb9743d6a08778b78d62d16b4230346d3508986 upstream.
In binder_init(), the destruction of binder_alloc_shrinker_init() is not performed in the wrong path, which will cause memory leaks. So this commit introduces binder_alloc_shrinker_exit() and calls it in the wrong path to fix that.
Signed-off-by: Qi Zheng zhengqi.arch@bytedance.com Acked-by: Carlos Llamas cmllamas@google.com Fixes: f2517eb76f1f ("android: binder: Add global lru shrinker to binder") Cc: stable stable@kernel.org Link: https://lore.kernel.org/r/20230625154937.64316-1-qi.zheng@linux.dev Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/android/binder.c | 1 + drivers/android/binder_alloc.c | 6 ++++++ drivers/android/binder_alloc.h | 1 + 3 files changed, 8 insertions(+)
--- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -6541,6 +6541,7 @@ err_init_binder_device_failed:
err_alloc_device_names_failed: debugfs_remove_recursive(binder_debugfs_dir_entry_root); + binder_alloc_shrinker_exit();
return ret; } --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -1086,6 +1086,12 @@ int binder_alloc_shrinker_init(void) return ret; }
+void binder_alloc_shrinker_exit(void) +{ + unregister_shrinker(&binder_shrinker); + list_lru_destroy(&binder_alloc_lru); +} + /** * check_buffer() - verify that buffer/offset is safe to access * @alloc: binder_alloc for this proc --- a/drivers/android/binder_alloc.h +++ b/drivers/android/binder_alloc.h @@ -125,6 +125,7 @@ extern struct binder_buffer *binder_allo int pid); extern void binder_alloc_init(struct binder_alloc *alloc); extern int binder_alloc_shrinker_init(void); +extern void binder_alloc_shrinker_exit(void); extern void binder_alloc_vma_close(struct binder_alloc *alloc); extern struct binder_buffer * binder_alloc_prepare_to_free(struct binder_alloc *alloc,