From owner-freebsd-hackers@freebsd.org Mon Jun 17 20:12:44 2019 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6547115C360D for ; Mon, 17 Jun 2019 20:12:44 +0000 (UTC) (envelope-from oliver.pinter@hardenedbsd.org) Received: from mail-yb1-xb34.google.com (mail-yb1-xb34.google.com [IPv6:2607:f8b0:4864:20::b34]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 1065580ACB for ; Mon, 17 Jun 2019 20:12:42 +0000 (UTC) (envelope-from oliver.pinter@hardenedbsd.org) Received: by mail-yb1-xb34.google.com with SMTP id n145so5020734ybg.10 for ; Mon, 17 Jun 2019 13:12:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hardenedbsd.org; s=google; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=4gs/SVYeriYDS/rXYZIVU5vpV603o7DcWiGMJghfaio=; b=Qx1G3n0bq5/9FHH0Uz3RPFdySYkqNdrAOTm52lYBbF41Q7rVJsBbwyL4HLKgs6Cl+h fUcmfBxDwEaElNj8m8NvHngclDRlPNb2u/7Mg/ybmjSUfqmO0ZEdgt3F7cWoI+ejMcxB 2r2MBaavkxdsBGAErLVZuZ9zWl2vTDZxIVBuYLgfpB+1LXy2kevhWrQ8ij+GW4VXhVv5 QfRVwQ6KUoxO/RotjWOBvqNHdDAYGr4bHlPNcUzu+YdHUDcWbrRIxlx+deLYLQwuJrvs Cy5AhuxxY4vX18O770K4s3kHcrkCu9zLfPLDxx6a94PHQeSFNBj4BF7h/7ydb1MbSylq gYyQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=4gs/SVYeriYDS/rXYZIVU5vpV603o7DcWiGMJghfaio=; b=AU+Ebe12hVaB/Yw8kmW/N01lVM69VPQn0ZL8h7RtWtvm59xfkUcNbJ1Ex4XyOsGXFu dTOKDgNFnwRg1KKZYu5EORNjZXd43Dj07OsSRQFg9DbS5HdpXMoqS8ORSDNE8j1M0ofh qnuz/bGBQozDJ0/GvgH4frr6LlH9qnbWoenxjN5LeI7NQtKk0vQivArAnS9vLbgjsP4z DQclNgC/kgwp9XLZyw8Z6WklRnd2fC4LKCz7UbF57X5Zcon04wcoFZyoOQRR+oYmm4x3 arYLGtnCwnGulNzDbz5hDjiSd0ZVyalAMhkMqNroTPgg9HVSJ+sTlodt9h/LFiLkvxuX aJ0Q== X-Gm-Message-State: APjAAAWMr88tXgYDn+HGmbzFkU2TlMTYzKJo+/SrPI34ObhpeTVTx6Vi zaZZQxE3XFIV9w/2GORsTm/ieYHNjB8JKXL70caHtw== X-Google-Smtp-Source: APXvYqwO4dzZLcRCKhhAhVkJHduwE+BTEr5F97ijz4IwgEFgyEcEPn8rdCcoEcnl6F7qB/ZppdVIuYomlA8WlR2hLDE= X-Received: by 2002:a25:6981:: with SMTP id e123mr51462133ybc.297.1560802362224; Mon, 17 Jun 2019 13:12:42 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a25:4a86:0:0:0:0:0 with HTTP; Mon, 17 Jun 2019 13:12:41 -0700 (PDT) In-Reply-To: <2464.1560798245@critter.freebsd.dk> References: <20190617162514.GC64731@raichu> <2464.1560798245@critter.freebsd.dk> From: Oliver Pinter Date: Mon, 17 Jun 2019 22:12:41 +0200 Message-ID: Subject: Re: dev:md: A kernel address leakage in sys/dev/md/md.c To: Poul-Henning Kamp Cc: Warner Losh , Fuqian Huang , FreeBSD Hackers , Mark Johnston X-Rspamd-Queue-Id: 1065580ACB X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; dkim=pass header.d=hardenedbsd.org header.s=google header.b=Qx1G3n0b; spf=pass (mx1.freebsd.org: domain of oliver.pinter@hardenedbsd.org designates 2607:f8b0:4864:20::b34 as permitted sender) smtp.mailfrom=oliver.pinter@hardenedbsd.org X-Spamd-Result: default: False [-6.49 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[hardenedbsd.org:s=google]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TAGGED_RCPT(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[hardenedbsd.org]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[hardenedbsd.org:+]; MX_GOOD(-0.01)[alt1.aspmx.l.google.com,aspmx.l.google.com,aspmx2.googlemail.com,alt2.aspmx.l.google.com,aspmx3.googlemail.com]; RCVD_IN_DNSWL_NONE(0.00)[4.3.b.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; NEURAL_HAM_SHORT(-0.98)[-0.984,0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; IP_SCORE(-2.99)[ip: (-9.42), ipnet: 2607:f8b0::/32(-3.17), asn: 15169(-2.32), country: US(-0.06)] Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Jun 2019 20:12:44 -0000 On Monday, June 17, 2019, Poul-Henning Kamp wrote: > -------- > In message 26YUVV8qFweRbvmbCe+EZQBaz2hJQ@mail.gmail.com> > , Warner Losh writes: > > >If we are serious about this, [...] > > then sysctl kern.geom "leaks" a lot of pointers... Or just run sysctl -a =C2=A6 grep -i 0xff on a fully configured system. > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetenc= e. > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org= " >