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Message-ID: <20241028111312.2869-2-thorsten.blum@linux.dev>
Date: Mon, 28 Oct 2024 12:13:12 +0100
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Trond Myklebust <trondmy@...nel.org>,
Anna Schumaker <anna@...nel.org>,
Kees Cook <kees@...nel.org>,
"Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>,
linux-nfs@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-hardening@...r.kernel.org
Subject: [RESEND PATCH] nfs: Annotate struct pnfs_commit_array with __counted_by()
Add the __counted_by compiler attribute to the flexible array member
buckets to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.
Compile-tested only.
Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
include/linux/nfs_xdr.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index e0ae0a14257f..e74a87bb18a4 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1331,7 +1331,7 @@ struct pnfs_commit_array {
struct rcu_head rcu;
refcount_t refcount;
unsigned int nbuckets;
- struct pnfs_commit_bucket buckets[];
+ struct pnfs_commit_bucket buckets[] __counted_by(nbuckets);
};
struct pnfs_ds_commit_info {
--
2.47.0
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