From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 22 Mar 2021 06:13:27 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1lOCsZ-0002yf-FC for lore@lore.pengutronix.de; Mon, 22 Mar 2021 06:13:27 +0100 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lOCsY-0005Fc-JW for lore@pengutronix.de; Mon, 22 Mar 2021 06:13:27 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=zrjIeSADnleJqQLqg4LrLtej3eaKVXue8A60pZF+3Y8=; b=bcR0tMyLF4mi0G12bxz8sWcnS T2To1/CSeAi7lTxT2phh8NrDxrcrIXTWZg2PjaYHR3RJFJ9byaCvn8C+qGKeQuKY3DBhcyBf8x71T Et/NdSySAG04WlmNxtcCMVDs8lFIMuoNW3MxujmUWaYBJnKIh0o+WDLc0EPxFvFb5+bJUP9dIxfkY vZgoxfNoAZdiIS+AgChzvLPQdDrglhy4FZqy4mwSgi5RaFTMmNoqkMXBNI3hSkv2Qsra0g+wjV3W9 aQGV7iM1DzxVQjf9KDEzjxeoFZvbtW108DMEiNGKNb17PiqG7DYlYbc0fwyiBkDYFplGn6aTsqzuI GIQap3Cxg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lOCre-00AvBh-PD; Mon, 22 Mar 2021 05:12:31 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lOCrR-00AvAj-Vr for barebox@lists.infradead.org; Mon, 22 Mar 2021 05:12:24 +0000 Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lOCrR-0004q2-Bn; Mon, 22 Mar 2021 06:12:17 +0100 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1lOCrQ-0006HS-RX; Mon, 22 Mar 2021 06:12:16 +0100 Date: Mon, 22 Mar 2021 06:12:16 +0100 From: Sascha Hauer To: Ahmad Fatoum Cc: Ahmad Fatoum , barebox@lists.infradead.org Message-ID: <20210322051216.GL23724@pengutronix.de> References: <20210223072427.166689-1-ahmad@a3f.at> <20210224084945.GI5549@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 06:11:57 up 32 days, 8:35, 49 users, load average: 0.13, 0.14, 0.10 User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210322_051222_430938_68079479 X-CRM114-Status: GOOD ( 25.00 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2001:8b0:10b:1:d65d:64ff:fe57:4e05 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-2.9 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH 1/2] kbuild: add '-fno-stack-check' to barebox build options X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) On Tue, Mar 16, 2021 at 08:10:45PM +0100, Ahmad Fatoum wrote: > Hello Sascha, > > On 24.02.21 09:49, Sascha Hauer wrote: > > On Tue, Feb 23, 2021 at 08:24:26AM +0100, Ahmad Fatoum wrote: > >> This ports over Linux commit 3ce120b16cc5 ("kbuild: add > >> '-fno-stack-check' to kernel build options"): > >> > >> Author: Linus Torvalds > >> > >> kbuild: add '-fno-stack-check' to kernel build options > >> > >> It appears that hardened gentoo enables "-fstack-check" by default for > >> gcc. > >> > >> That doesn't work _at_all_ for the kernel, because the kernel stack > >> doesn't act like a user stack at all: it's much smaller, and it doesn't > >> auto-expand on use. So the extra "probe one page below the stack" code > >> generated by -fstack-check just breaks the kernel in horrible ways, > >> causing infinite double faults etc. > >> > >> [ I have to say, that the particular code gcc generates looks very > >> stupid even for user space where it works, but that's a separate > >> issue. ] > >> > >> Signed-off-by: Linus Torvalds > >> > >> I am porting it, because it may become more acute with the incoming > >> support for multiple stacks (via initjmp). > >> > >> Signed-off-by: Ahmad Fatoum > >> --- > > > > Applied, thanks > > Can't find both patches in next. They should be there now. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox