From: Thorsten Blum <thorsten.blum@linux.dev>
To: Miklos Szeredi <miklos@szeredi.hu>,
Amir Goldstein <amir73il@gmail.com>, Kees Cook <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Thorsten Blum <thorsten.blum@linux.dev>,
linux-unionfs@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: [PATCH] ovl: Annotate struct ovl_entry with __counted_by()
Date: Sat, 3 May 2025 15:25:36 +0200 [thread overview]
Message-ID: <20250503132537.343082-1-thorsten.blum@linux.dev> (raw)
Add the __counted_by() compiler attribute to the flexible array member
'__lowerstack' to improve access bounds-checking via CONFIG_UBSAN_BOUNDS
and CONFIG_FORTIFY_SOURCE.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
fs/overlayfs/ovl_entry.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
index cb449ab310a7..afb7762f873f 100644
--- a/fs/overlayfs/ovl_entry.h
+++ b/fs/overlayfs/ovl_entry.h
@@ -51,7 +51,7 @@ struct ovl_path {
struct ovl_entry {
unsigned int __numlower;
- struct ovl_path __lowerstack[];
+ struct ovl_path __lowerstack[] __counted_by(__numlower);
};
/* private information held for overlayfs's superblock */
--
2.49.0
next reply other threads:[~2025-05-03 13:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-03 13:25 Thorsten Blum [this message]
2025-05-05 12:06 ` [PATCH] ovl: Annotate struct ovl_entry with __counted_by() Miklos Szeredi
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