[PATCH] bcachefs: Annotate struct bucket_array with __counted_by()

[Thorsten Blum]

Add the __counted_by compiler attribute to the flexible array member
bucket to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.

Signed-off-by: Thorsten Blum <thorsten.b...@toblux.com>
---
 fs/bcachefs/buckets_types.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/bcachefs/buckets_types.h b/fs/bcachefs/buckets_types.h
index c9698cdf866f..a19460a1bb7c 100644
--- a/fs/bcachefs/buckets_types.h
+++ b/fs/bcachefs/buckets_types.h
@@ -24,7 +24,7 @@ struct bucket_array {
        u16                     first_bucket;
        size_t                  nbuckets;
        size_t                  nbuckets_minus_first;
-       struct bucket           b[];
+       struct bucket           b[] __counted_by(nbuckets);
 };
 
 struct bucket_gens {
-- 
2.46.0