[PATCH v2 1/5] binder: Fix selftest page indexing

From: Tiffany Yang
Date: Tue Jul 01 2025 - 21:05:17 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.

Signed-off-by: Tiffany Yang <ynaffit@xxxxxxxxxx>
---
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..486af3ec3c02 100644
--- a/drivers/android/binder_alloc_selftest.c
+++ b/drivers/android/binder_alloc_selftest.c
@@ -142,12 +142,12 @@ 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++) {
/**
* Error message on a free page can be false positive
* if binder shrinker ran during binder_alloc_free_buf
* calls above.
*/
+ for (i = 0; i <= (end - 1) / PAGE_SIZE; i++) {
if (list_empty(page_to_lru(alloc->pages[i]))) {
pr_err_size_seq(sizes, seq);
pr_err("expect lru but is %s at page index %d\n",
--
2.50.0.727.gbf7dc18ff4-goog