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 44175C433F5 for ; Tue, 15 Feb 2022 15:32:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240180AbiBOPc1 (ORCPT ); Tue, 15 Feb 2022 10:32:27 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:48772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240309AbiBOPbC (ORCPT ); Tue, 15 Feb 2022 10:31:02 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DFFAC2E75; Tue, 15 Feb 2022 07:29:08 -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 ams.source.kernel.org (Postfix) with ESMTPS id 395C1B81AEF; Tue, 15 Feb 2022 15:29:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3C327C340ED; Tue, 15 Feb 2022 15:29:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1644938946; bh=mlCVfXCI/MPFLPPvRfg1e5hONyIiSJQMvH37hKzLE5Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aoyYXbKcRDmC13M5fgpYVIHYA9IV2q0ZUyK3T5HJo1l4AxszjeN5wOUyLW94ohi+v yvqIftoOWsVnNAhsrliWw90GtDm7Lf7agv0klShjNo3U6DZd30GhNEdYz2ZPo/qsmd aNhvZshonLOYbyGSwQRLgFKChQTdCgn5OwEfi3Y1coyPZknOEa8u9Qw9KkSPgPzFas +E0diZ83MQV4b6rWfHsYSN684k7lnF9uWg2k/XLmUOSzfXn8SPD6fwfh7WoONSYVI4 5PrXjAiyArqrzM+DHy6BQAkQiai3lheSpvDRa79A9MshrUO8xz/glk0MD4R/LRt+mM qf0gEOhie2J5Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Brenda Streiff , Masahiro Yamada , Sasha Levin , linux-kbuild@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 19/33] kconfig: let 'shell' return enough output for deep path names Date: Tue, 15 Feb 2022 10:28:17 -0500 Message-Id: <20220215152831.580780-19-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220215152831.580780-1-sashal@kernel.org> References: <20220215152831.580780-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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; -- 2.34.1