From patchwork Mon Feb 21 08:49:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 544887 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 2128BC433F5 for ; Mon, 21 Feb 2022 09:14:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244539AbiBUJOs (ORCPT ); Mon, 21 Feb 2022 04:14:48 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:33972 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349825AbiBUJM5 (ORCPT ); Mon, 21 Feb 2022 04:12:57 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 380322D1E4; Mon, 21 Feb 2022 01:06:01 -0800 (PST) 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 sin.source.kernel.org (Postfix) with ESMTPS id A12C8CE0E92; Mon, 21 Feb 2022 09:05:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 86C73C340E9; Mon, 21 Feb 2022 09:05:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1645434358; bh=mlCVfXCI/MPFLPPvRfg1e5hONyIiSJQMvH37hKzLE5Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DZdPbRpyA9qYycU2D2gvUcyASb9SC29JtFDOhLlgEkhArqQzMhev3cNJlKBpGYi41 sqHOPTmyXmmaNO7Qq426isKIrdFctFQUvNW3SmrAGkLPGv8fiWixfJDf7F+HTnmx1Z BO5GtY7FX/84UzvL+s3bsvF6AAeeu2p99sIpEIu0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Brenda Streiff , Masahiro Yamada , Sasha Levin Subject: [PATCH 5.10 102/121] kconfig: let shell return enough output for deep path names Date: Mon, 21 Feb 2022 09:49:54 +0100 Message-Id: <20220221084924.632791683@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220221084921.147454846@linuxfoundation.org> References: <20220221084921.147454846@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Brenda Streiff [ Upstream commit 8a4c5b2a6d8ea079fa36034e8167de87ab6f8880 ] The 'shell' built-in only returns the first 256 bytes of the command's output. In some cases, 'shell' is used to return a path; by bumping up the buffer size to 4096 this lets us capture up to PATH_MAX. The specific case where I ran into this was due to commit 1e860048c53e ("gcc-plugins: simplify GCC plugin-dev capability test"). After this change, we now use `$(shell,$(CC) -print-file-name=plugin)` to return a path; if the gcc path is particularly long, then the path ends up truncated at the 256 byte mark, which makes the HAVE_GCC_PLUGINS depends test always fail. Signed-off-by: Brenda Streiff Signed-off-by: Masahiro Yamada Signed-off-by: Sasha Levin --- scripts/kconfig/preprocess.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/scripts/kconfig/preprocess.c b/scripts/kconfig/preprocess.c index 0590f86df6e40..748da578b418c 100644 --- a/scripts/kconfig/preprocess.c +++ b/scripts/kconfig/preprocess.c @@ -141,7 +141,7 @@ static char *do_lineno(int argc, char *argv[]) static char *do_shell(int argc, char *argv[]) { FILE *p; - char buf[256]; + char buf[4096]; char *cmd; size_t nread; int i;