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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 622B2C00144 for ; Tue, 2 Aug 2022 01:51:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235491AbiHBBvq (ORCPT ); Mon, 1 Aug 2022 21:51:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231529AbiHBBvi (ORCPT ); Mon, 1 Aug 2022 21:51:38 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B112E19292; Mon, 1 Aug 2022 18:51:35 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 577CC6104E; Tue, 2 Aug 2022 01:51:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 068F5C433D6; Tue, 2 Aug 2022 01:51:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659405094; bh=klVt3yCrvBHhkydJiycgq8KSkSxzwlLwoeN/vGNg5Z0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nYleW1naIKYbh7memj3rI1mFWrsIeQMIDLrIVKFvPBDLKD0lCpBk/2GLc/A7PiITM m18OP5f8rZAHZqNBrx8TWiITJ1OWLgzScDHyKJ7+a8yqVyMNZtPyCFqkQFoIfHJ0rr InWbA4nwM/Xef3Y3AKPUkfE9aL3eESEk63vVaKYmc+eB6tBRnBmc6dvm7MwuaVXsXE cUA7/PjUUBdo3Wc0R1+1rvPBXOlg5huWIw2t98XvCFOvKxRX/+G2+LmT+JQdfKxdP8 +Fnar3yX8N5/rhXT+xYo56gQTYvzvFOPEf1v/pzRuigQu7qvXFz6Z07bveEcVIIPDR BqRBLeQTsLIHw== From: Miguel Ojeda To: Linus Torvalds , Greg Kroah-Hartman Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Jarkko Sakkinen , Miguel Ojeda , Boqun Feng Subject: [PATCH v8 02/31] kallsyms: avoid hardcoding buffer size Date: Tue, 2 Aug 2022 03:49:49 +0200 Message-Id: <20220802015052.10452-3-ojeda@kernel.org> In-Reply-To: <20220802015052.10452-1-ojeda@kernel.org> References: <20220802015052.10452-1-ojeda@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: rust-for-linux@vger.kernel.org From: Boqun Feng This introduces `KSYM_NAME_LEN_BUFFER` in place of the previously hardcoded size of the input buffer. It will also make it easier to update the size in a single place in a later patch. Signed-off-by: Boqun Feng Co-developed-by: Miguel Ojeda Signed-off-by: Miguel Ojeda --- scripts/kallsyms.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index 52f5488c61bc..f3c5a2623f71 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -27,8 +27,14 @@ #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0])) +#define _stringify_1(x) #x +#define _stringify(x) _stringify_1(x) + #define KSYM_NAME_LEN 128 +/* A substantially bigger size than the current maximum. */ +#define KSYM_NAME_LEN_BUFFER 499 + struct sym_entry { unsigned long long addr; unsigned int len; @@ -198,13 +204,13 @@ static void check_symbol_range(const char *sym, unsigned long long addr, static struct sym_entry *read_symbol(FILE *in) { - char name[500], type; + char name[KSYM_NAME_LEN_BUFFER+1], type; unsigned long long addr; unsigned int len; struct sym_entry *sym; int rc; - rc = fscanf(in, "%llx %c %499s\n", &addr, &type, name); + rc = fscanf(in, "%llx %c %" _stringify(KSYM_NAME_LEN_BUFFER) "s\n", &addr, &type, name); if (rc != 3) { if (rc != EOF && fgets(name, sizeof(name), in) == NULL) fprintf(stderr, "Read error or end of file.\n"); -- 2.37.1