From: Thorsten Blum <thorsten.blum@linux.dev>
To: Kees Cook <kees@kernel.org>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Jeff Layton <jlayton@kernel.org>, NeilBrown <neil@brown.name>
Cc: Thorsten Blum <thorsten.blum@linux.dev>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: [PATCH RESEND] fs/xattr: Annotate struct simple_xattr with __counted_by
Date: Sat, 22 Nov 2025 13:00:22 +0100 [thread overview]
Message-ID: <20251122120028.448504-1-thorsten.blum@linux.dev> (raw)
Add the __counted_by() compiler attribute to the flexible array member
'value' to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and
CONFIG_FORTIFY_SOURCE.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
include/linux/xattr.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index 64e9afe7d647..296b5ee5c979 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -114,7 +114,7 @@ struct simple_xattr {
struct rb_node rb_node;
char *name;
size_t size;
- char value[];
+ char value[] __counted_by(size);
};
void simple_xattrs_init(struct simple_xattrs *xattrs);
--
2.51.1
next reply other threads:[~2025-11-22 12:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-22 12:00 Thorsten Blum [this message]
2025-11-25 12:00 ` [PATCH RESEND] fs/xattr: Annotate struct simple_xattr with __counted_by Jan Kara
-- strict thread matches above, loose matches on Subject: below --
2026-01-05 12:20 Thorsten Blum
2026-01-12 22:30 ` Kees Cook
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