[PATCH] libceph: Annotate crush_rule::steps with __counted_by()

[Thorsten Blum <blum@kernel.org>]

Add __counted_by() to crush_rule::steps to improve access bounds
checking via CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE.

Signed-off-by: Thorsten Blum <blum@kernel.org>
---
 include/linux/crush/crush.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/crush/crush.h b/include/linux/crush/crush.h
index 30dba392b730..7d243b9b1093 100644
--- a/include/linux/crush/crush.h
+++ b/include/linux/crush/crush.h
@@ -87,7 +87,7 @@ struct crush_rule_mask {
 struct crush_rule {
 	__u32 len;
 	struct crush_rule_mask mask;
-	struct crush_rule_step steps[];
+	struct crush_rule_step steps[] __counted_by(len);
 };
 
 #define crush_rule_size(len) (sizeof(struct crush_rule) + \