[PATCH v4 1/6] binder: Fix selftest page indexing

From: Tiffany Yang
Date: Wed Jul 16 2025 - 21:10:41 EST


The binder allocator selftest was only checking the last page of buffers
that ended on a page boundary. Correct the page indexing to account for
buffers that are not page-aligned.

Acked-by: Carlos Llamas <cmllamas@xxxxxxxxxx>
Signed-off-by: Tiffany Yang <ynaffit@xxxxxxxxxx>
---
v4:
* Fixed unaligned comment
* Collected tags
---
drivers/android/binder_alloc_selftest.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/android/binder_alloc_selftest.c b/drivers/android/binder_alloc_selftest.c
index c88735c54848..de5bd848d042 100644
--- a/drivers/android/binder_alloc_selftest.c
+++ b/drivers/android/binder_alloc_selftest.c
@@ -142,7 +142,7 @@ static void binder_selftest_free_buf(struct binder_alloc *alloc,
for (i = 0; i < BUFFER_NUM; i++)
binder_alloc_free_buf(alloc, buffers[seq[i]]);

- for (i = 0; i < end / PAGE_SIZE; i++) {
+ for (i = 0; i <= (end - 1) / PAGE_SIZE; i++) {
/**
* Error message on a free page can be false positive
* if binder shrinker ran during binder_alloc_free_buf
--
2.50.0.727.gbf7dc18ff4-goog