From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18580 invoked by alias); 16 Jan 2019 22:47:18 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 18550 invoked by uid 89); 16 Jan 2019 22:47:17 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-1.6 required=5.0 tests=BAYES_00,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=no version=3.3.2 spammy=H*RU:209.85.215.193, Hx-spam-relays-external:209.85.215.193, H*Ad:U*rth, H*r:sk:mail-pg X-HELO: mail-pg1-f193.google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:openpgp:autocrypt:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=j4l1G6RpoMdxN3hYqJMEyj4yl104DYBQX14IyJ9WPN4=; b=K1JGdKIoVpWZ5PSHd/bR4sWxHdkqS0toaJrju7f0r67BPB2el3kVLh5T8q/+9IArCi 8j4h/xeBpUDheabBXtc09bG7rb0dvL9jSNyETDgSOmHNWiaqE4NcpkO6AiA7MR/ASEvZ B+0dieREmrlXs+8eHjnWKEC13khxuXEytEKSNNfGBprefDtkkjYTvq6fstiD5nE4XLQl 3TJ7b5dv9NIrpCVs+3iHF3qcjSf7X6ymGvdyJcHxK02MFo2dxT42/HTzOCGF5O07FC4i BfQpnXXeHs8s52N7DefW7fvQAvGxBTzIJvKafzgcGA+0H/PJQt+KYhYPKwU4yGc8zGSr J7iQ== Return-Path: Sender: Richard Henderson Subject: Re: [PATCH] Tests for minimal signal handler functionality in MINSIGSTKSZ space. To: Carlos O'Donell , Zack Weinberg Cc: GNU C Library , Siddhesh Poyarekar References: <20190115200526.4677-1-zackw@panix.com> <1d45c6cb-192c-5ade-513e-a40c65d9fb7e@redhat.com> <35b94b4d-adaa-7a83-a357-d82d6b4b2249@redhat.com> From: Richard Henderson Openpgp: preference=signencrypt Message-ID: <089ec328-7d41-2afb-559c-d13c4a6d9f69@twiddle.net> Date: Wed, 16 Jan 2019 22:47:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <35b94b4d-adaa-7a83-a357-d82d6b4b2249@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-SW-Source: 2019-01/txt/msg00418.txt.bz2 On 1/17/19 4:06 AM, Carlos O'Donell wrote: > I worried about this during the original review, but my conclusion was > that no sane user would do such an alignment to push their own stack > against the guard. At least I've never seen it done. I have seen users use malloc to allocate stacks. Which is basically the same as putting the allocation next to the guard, except it corrupts the arena instead. :-P r~