From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62A0FC433EF for ; Mon, 18 Oct 2021 13:52:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50FAA60FC2 for ; Mon, 18 Oct 2021 13:52:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233224AbhJRNyN (ORCPT ); Mon, 18 Oct 2021 09:54:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:56110 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233867AbhJRNwF (ORCPT ); Mon, 18 Oct 2021 09:52:05 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3FF9261356; Mon, 18 Oct 2021 13:38:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1634564319; bh=V5q8jqpNLEFvULBQ/nLGImYDqTsVmi2RD6LJkW5bd4g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ocvc7rYBu9DosRp8KNsdKtJrVopQtSte0UalZDFXY5VgxQ5cftf12q0R5uz2CWF07 mUNL+Uw0+IxC4gBdomyIKf/YouMPVcH4EciQpKRywi2Cgwb96VfPPZQwRNdugahvl7 PMdKqY3IgOddmwhg+1JPGfVhWNSqfCtuQfqyxftc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Arnd Bergmann Subject: [PATCH 5.14 045/151] cb710: avoid NULL pointer subtraction Date: Mon, 18 Oct 2021 15:23:44 +0200 Message-Id: <20211018132342.169193215@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211018132340.682786018@linuxfoundation.org> References: <20211018132340.682786018@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Arnd Bergmann commit 42641042c10c757fe10cc09088cf3f436cec5007 upstream. clang-14 complains about an unusual way of converting a pointer to an integer: drivers/misc/cb710/sgbuf2.c:50:15: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction] return ((ptr - NULL) & 3) != 0; Replace this with a normal cast to uintptr_t. Fixes: 5f5bac8272be ("mmc: Driver for CB710/720 memory card reader (MMC part)") Cc: stable Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20210927121408.939246-1-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/misc/cb710/sgbuf2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/misc/cb710/sgbuf2.c +++ b/drivers/misc/cb710/sgbuf2.c @@ -47,7 +47,7 @@ static inline bool needs_unaligned_copy( #ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS return false; #else - return ((ptr - NULL) & 3) != 0; + return ((uintptr_t)ptr & 3) != 0; #endif }