From: Thorsten Blum <thorsten.blum@linux.dev>
To: Tyler Hicks <code@tyhicks.com>, Kees Cook <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Christian Brauner <brauner@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Eric Biggers <ebiggers@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>
Cc: Thorsten Blum <thorsten.blum@linux.dev>,
ecryptfs@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: [PATCH] ecryptfs: Annotate struct ecryptfs_message with __counted_by
Date: Mon, 12 Jan 2026 12:53:11 +0100 [thread overview]
Message-ID: <20260112115314.739612-2-thorsten.blum@linux.dev> (raw)
Add the __counted_by() compiler attribute to the flexible array member
'data' to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
fs/ecryptfs/ecryptfs_kernel.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 62a2ea7f59ed..f58b12be8267 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -359,7 +359,7 @@ struct ecryptfs_message {
/* Inherits from msg_ctx->index */
u32 index;
u32 data_len;
- u8 data[];
+ u8 data[] __counted_by(data_len);
};
struct ecryptfs_msg_ctx {
--
Thorsten Blum <thorsten.blum@linux.dev>
GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4
next reply other threads:[~2026-01-12 16:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-12 11:53 Thorsten Blum [this message]
2026-01-13 1:41 ` [PATCH] ecryptfs: Annotate struct ecryptfs_message with __counted_by Tyler Hicks
2026-01-13 19:53 ` Kees Cook
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