[PATCH] lsm: Add a __counted_by() annotation to lsm_ctx.ctx

[Mark Brown]

The ctx in struct lsm_ctx is an array of size ctx_len, tell the compiler
about this using __counted_by() where supported to improve the ability to
detect overflow issues.

Reported-by: Aishwarya TCV <aishwarya.tcv@xxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 include/uapi/linux/lsm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h
index f0386880a78e..4150333d224f 100644
--- a/include/uapi/linux/lsm.h
+++ b/include/uapi/linux/lsm.h
@@ -36,7 +36,7 @@ struct lsm_ctx {
 	__u64 flags;
 	__u64 len;
 	__u64 ctx_len;
-	__u8 ctx[];
+	__u8 ctx[] __counted_by(ctx_len);
 };
 
 /*

---
base-commit: ec4e9d630a64df500641892f4e259e8149594a99
change-id: 20231221-lsm-fix-counted-by-f9fd827e26aa

Best regards,
-- 
Mark Brown <broonie@xxxxxxxxxx>