[PATCH v3 01/49] binder: fix memory leak in binder_init()
From: Qi Zheng <hidden>
Date: 2023-07-27 08:10:20
Also in:
dm-devel, dri-devel, kvm, linux-arm-msm, linux-bcache, linux-btrfs, linux-ext4, linux-f2fs-devel, linux-fsdevel, linux-mm, linux-nfs, linux-raid, linux-xfs, lkml, rcu, xen-devel
Subsystem:
android drivers, the rest · Maintainers:
Greg Kroah-Hartman, Arve Hjønnevåg, Todd Kjos, Christian Brauner, Carlos Llamas, Alice Ryhl, Linus Torvalds
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.
Fixes: f2517eb76f1f ("android: binder: Add global lru shrinker to binder")
Signed-off-by: Qi Zheng <redacted>
Acked-by: Carlos Llamas <cmllamas@google.com>
---
drivers/android/binder.c | 1 +
drivers/android/binder_alloc.c | 6 ++++++
drivers/android/binder_alloc.h | 1 +
3 files changed, 8 insertions(+)
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 486c8271cab7..d720f93d8b19 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c@@ -6617,6 +6617,7 @@ static int __init binder_init(void) err_alloc_device_names_failed: debugfs_remove_recursive(binder_debugfs_dir_entry_root); + binder_alloc_shrinker_exit(); return ret; }
diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c
index 662a2a2e2e84..e3db8297095a 100644
--- a/drivers/android/binder_alloc.c
+++ b/drivers/android/binder_alloc.c@@ -1087,6 +1087,12 @@ 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
diff --git a/drivers/android/binder_alloc.h b/drivers/android/binder_alloc.h
index 138d1d5af9ce..dc1e2b01dd64 100644
--- a/drivers/android/binder_alloc.h
+++ b/drivers/android/binder_alloc.h@@ -129,6 +129,7 @@ extern struct binder_buffer *binder_alloc_new_buf(struct binder_alloc *alloc, 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,
--
2.30.2