[0/2] string.c: Add wcslen()

Message ID	20250325-string-add-wcslen-for-llvm-opt-v1-0-b8f1e2c17888@kernel.org (mailing list archive)
Headers	show Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9392729408; Tue, 25 Mar 2025 15:45:41 +0000 (UTC) From: Nathan Chancellor <nathan@kernel.org> Subject: [PATCH 0/2] string.c: Add wcslen() Date: Tue, 25 Mar 2025 08:45:17 -0700 Message-Id: <20250325-string-add-wcslen-for-llvm-opt-v1-0-b8f1e2c17888@kernel.org> Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: Kees Cook <kees@kernel.org> Cc: Andy Shevchenko <andy@kernel.org>, Nick Desaulniers <nick.desaulniers+lkml@gmail.com>, Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>, Ard Biesheuvel <ardb@kernel.org>, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev, linux-efi@vger.kernel.org, stable@vger.kernel.org, Nathan Chancellor <nathan@kernel.org>
Series	string.c: Add wcslen() \| expand [0/2] string.c: Add wcslen() [1/2] lib/string.c: Add wcslen() [RFC,2/2] wcslen() prototype in string.h

Message ID

20250325-string-add-wcslen-for-llvm-opt-v1-0-b8f1e2c17888@kernel.org (mailing list archive)

Headers

From: Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH 0/2] string.c: Add wcslen()
Date: Tue, 25 Mar 2025 08:45:17 -0700
Message-Id: 
 <20250325-string-add-wcslen-for-llvm-opt-v1-0-b8f1e2c17888@kernel.org>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
To: Kees Cook <kees@kernel.org>
Cc: Andy Shevchenko <andy@kernel.org>,
 Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
 Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>,
 Ard Biesheuvel <ardb@kernel.org>, linux-kernel@vger.kernel.org,
 linux-hardening@vger.kernel.org, llvm@lists.linux.dev,
 linux-efi@vger.kernel.org, stable@vger.kernel.org,
 Nathan Chancellor <nathan@kernel.org>

Series

string.c: Add wcslen() | expand

Message

Nathan Chancellor March 25, 2025, 3:45 p.m. UTC

Hi all,

A recent LLVM change [1] introduces a call to wcslen() in
fs/smb/client/smb2pdu.c through UniStrcat() via
alloc_path_with_tree_prefix(). Similar to the bcmp() and stpcpy()
additions that happened in 5f074f3e192f and 1e1b6d63d634, add wcslen()
to fix the linkage failure.

The second change is RFC because it makes the first change a little more
convoluted for the sake of making it externally available, which may or
may not be desirable. See the commit message for more details.

[1]: https://github.com/llvm/llvm-project/commit/9694844d7e36fd5e01011ab56b64f27b867aa72d

---
Nathan Chancellor (2):
      lib/string.c: Add wcslen()
      [RFC] wcslen() prototype in string.h

 drivers/firmware/efi/libstub/printk.c |  4 ++--
 include/linux/string.h                |  2 ++
 lib/string.c                          | 11 +++++++++++
 3 files changed, 15 insertions(+), 2 deletions(-)
---
base-commit: 78ab93c78fb31c5dfe207318aa2b7bd4e41f8dba
change-id: 20250324-string-add-wcslen-for-llvm-opt-705791db92c0

Best regards,