From patchwork Tue Apr 5 07:28:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 556940 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 4A354C35294 for ; Tue, 5 Apr 2022 11:32:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241724AbiDEL0Z (ORCPT ); Tue, 5 Apr 2022 07:26:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349503AbiDEJt6 (ORCPT ); Tue, 5 Apr 2022 05:49:58 -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 4F7DD196; Tue, 5 Apr 2022 02:47:54 -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 E0B5161576; Tue, 5 Apr 2022 09:47:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BFB1BC385A2; Tue, 5 Apr 2022 09:47:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649152073; bh=pLIQlGkUzPkW36H+QN7RfbIl6w439D/LXITrrVw3+x8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ielukMC3bJP7GOPhRKt7LYaxhOjeANxHC0rumQqKecjWwqckC2hS6p0mzx29H9v82 YxW7nr2ZsB+vknV2Cx83x60U3VTucyKM41LJe4Z90c5+ZfKF+2vhWxZ4b7KrgDQJTl +cOesVJO5PvD+zlyqYN4YFD4gOKfdpWQJKAVhncI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, kgdb-bugreport@lists.sourceforge.net, Jason Wessel , Daniel Thompson , Douglas Anderson , Arnd Bergmann , Igor Zhbanov , Randy Dunlap , Sasha Levin Subject: [PATCH 5.15 645/913] kgdbts: fix return value of __setup handler Date: Tue, 5 Apr 2022 09:28:27 +0200 Message-Id: <20220405070359.173490547@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220405070339.801210740@linuxfoundation.org> References: <20220405070339.801210740@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Randy Dunlap [ Upstream commit 96c9e802c64014a7716865332d732cc9c7f24593 ] __setup() handlers should return 1 to indicate that the boot option has been handled. A return of 0 causes the boot option/value to be listed as an Unknown kernel parameter and added to init's (limited) environment strings. So return 1 from kgdbts_option_setup(). Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc7 kgdboc=kbd kgdbts=", will be passed to user space. Run /sbin/init as init process with arguments: /sbin/init with environment: HOME=/ TERM=linux BOOT_IMAGE=/boot/bzImage-517rc7 kgdboc=kbd kgdbts= Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Fixes: e8d31c204e36 ("kgdb: add kgdb internal test suite") Cc: kgdb-bugreport@lists.sourceforge.net Cc: Jason Wessel Cc: Daniel Thompson Cc: Douglas Anderson Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Reported-by: Igor Zhbanov Reviewed-by: Douglas Anderson Signed-off-by: Randy Dunlap Link: https://lore.kernel.org/r/20220308033255.22118-1-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/kgdbts.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c index 67c5b452dd35..88b91ad8e541 100644 --- a/drivers/misc/kgdbts.c +++ b/drivers/misc/kgdbts.c @@ -1070,10 +1070,10 @@ static int kgdbts_option_setup(char *opt) { if (strlen(opt) >= MAX_CONFIG_LEN) { printk(KERN_ERR "kgdbts: config string too long\n"); - return -ENOSPC; + return 1; } strcpy(config, opt); - return 0; + return 1; } __setup("kgdbts=", kgdbts_option_setup);