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

[Thorsten Blum]

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

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

diff --git a/fs/bcachefs/xattr_format.h b/fs/bcachefs/xattr_format.h
index e9f810539552..c7916011ef34 100644
--- a/fs/bcachefs/xattr_format.h
+++ b/fs/bcachefs/xattr_format.h
@@ -13,7 +13,7 @@ struct bch_xattr {
        __u8                    x_type;
        __u8                    x_name_len;
        __le16                  x_val_len;
-       __u8                    x_name[];
+       __u8                    x_name[] __counted_by(x_name_len);
 } __packed __aligned(8);
 
 #endif /* _BCACHEFS_XATTR_FORMAT_H */
-- 
2.46.0