From nobody Sat May 18 06:35:11 2024 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4VhDbS1QlWz5LB9q for ; Sat, 18 May 2024 06:35:16 +0000 (UTC) (envelope-from paulf2718@gmail.com) Received: from mail-wr1-x429.google.com (mail-wr1-x429.google.com [IPv6:2a00:1450:4864:20::429]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1D4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4VhDbR2dGDz4HX7 for ; Sat, 18 May 2024 06:35:15 +0000 (UTC) (envelope-from paulf2718@gmail.com) Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20230601 header.b=nR9rsHSx; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of paulf2718@gmail.com designates 2a00:1450:4864:20::429 as permitted sender) smtp.mailfrom=paulf2718@gmail.com Received: by mail-wr1-x429.google.com with SMTP id ffacd0b85a97d-34f0e55787aso679086f8f.2 for ; Fri, 17 May 2024 23:35:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1716014114; x=1716618914; darn=freebsd.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:to:subject:user-agent:mime-version:date:message-id:from :to:cc:subject:date:message-id:reply-to; bh=ZrE2UBL+mGKJ/CKC0i7xhVC3ZTqoA+TIu6ow3l4Wnho=; b=nR9rsHSxgHD7uheev7etDf/hTOo5pU+FBNvqwViHSsKek9fT/PkkNMLIdZgJIozEmO 7L81jNMmWKiPJ828rtm0fZrnOhMeGtC0aRcNwJKxUiwpwbRPKWwO+KOvpFWsDyxrGu2D WiM84zpkZDcvppNLgFD2owSGcP8PuD8xQ5zBUpoNWYdf84ekdhFGx53wTRFSJEHKSjH3 09tpHzER6YZvYFKPmlMGE1nknaOXGsqzqYYMt8xoF77smnr47ZD/jyaJQ7X9xlW274Q6 TL1HuXr+VrKczKByzw4pR4narQ2RD1atd6y0jJFSXNfD/C52oRBVXhK33/ObQI5m7EVB JlBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716014114; x=1716618914; h=content-transfer-encoding:in-reply-to:from:content-language :references:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ZrE2UBL+mGKJ/CKC0i7xhVC3ZTqoA+TIu6ow3l4Wnho=; b=BtaAbVQS1kdK33AApoZ6rArzBn9qJNXR3uLlZ11VOJTtOOeYkxRzQcsXQGq9TgmVx1 xBkhhmmG1LsQFWmiAhygyh80vDlgGZyRifwQSWGCo8uz19DWT21+OYdGqN3ncHysZKi7 RGONzlanXf/97aOtHFeCAGGulweMOL6iQea5W8aNYyHNqOtKU68Eyil/6iP/6ZhARG8t 7d4NY90EUKink1+QZLgE0f87r/C/86vZCU3XbsukY3w2OfCmdBoVEvoMEu3cTbD712vH W6V1Gxqg7TXIOZUROS2kSuIc+TtHof1IFYLU0iCvkfOS5o0ioiDQcD6o5avtOH67PVE6 1JYw== X-Gm-Message-State: AOJu0YwgtPTMXT7MmX36iDtAZOHL89pHPCIBL8+qivNJ742ug+8yOBuH HVgznR0FkUSDUIUXA8B9DObA+tW8Ka9Wc0zAmqc+X7wLNvMrQhRdS/yi8g== X-Google-Smtp-Source: AGHT+IHTX9+nWXwSI7NcndTtkCw8o3QBHJx6ci7RXSew5+A1P8LJym7IJFU4vFI5sieS8k7Y4ON01A== X-Received: by 2002:a5d:4f04:0:b0:34d:a4b4:9f60 with SMTP id ffacd0b85a97d-3504a968882mr16767600f8f.52.1716014113731; Fri, 17 May 2024 23:35:13 -0700 (PDT) Received: from ?IPV6:2a01:cb15:8010:2f00:1aa9:5ff:fe16:2efb? ([2a01:cb15:8010:2f00:1aa9:5ff:fe16:2efb]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3502bbbbde1sm23389371f8f.97.2024.05.17.23.35.12 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 May 2024 23:35:13 -0700 (PDT) Message-ID: Date: Sat, 18 May 2024 06:35:11 +0000 List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Initial implementation of _FORTIFY_SOURCE To: freebsd-hackers@freebsd.org References: Content-Language: en-US From: Paul Floyd In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spamd-Bar: --- X-Spamd-Result: default: False [-3.95 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.96)[-0.955]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36:c]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20230601]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; ARC_NA(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; FROM_HAS_DN(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; MID_RHS_MATCH_FROM(0.00)[]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::429:from] X-Rspamd-Queue-Id: 4VhDbR2dGDz4HX7 On 13-05-24 17:47, Kyle Evans wrote: > Hi, > > As of 9bfd3b407 ("Add a build knob for _FORTIFY_SOURCE"), I've imported > an initial version of FORTIFY_SOURCE from FreeBSD.  FORTIFY_SOURCE is an > improvement over classical SSP, doing compiler-aided checking of stack > object sizes to detect more fine-grained stack overflow without relying > on the randomized stack canary just past the stack frame. Hi I'll try to have a go this weekend. Are is there any known impact on debuggability? Specifically for tools that need to do stack waliking. A+ Paul