From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_SBL,URIBL_SBL_A, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17338C28CBC for ; Wed, 6 May 2020 15:06:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C623820936 for ; Wed, 6 May 2020 15:06:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (3072-bit key) header.d=samba.org header.i=@samba.org header.b="n31Oc8XX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729165AbgEFPG5 (ORCPT ); Wed, 6 May 2020 11:06:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728428AbgEFPG4 (ORCPT ); Wed, 6 May 2020 11:06:56 -0400 Received: from hr2.samba.org (hr2.samba.org [IPv6:2a01:4f8:192:486::2:0]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DBE1CC061A0F for ; Wed, 6 May 2020 08:06:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=samba.org; s=42; h=Date:Message-ID:From:Cc:To; bh=uQM/cQVafwNmD7Wo0TeUpVvm7dI1YqAjP6RvPTXWlPs=; b=n31Oc8XXgazSQj/8XIeo6z3TjA 4hJ3YanAIpT6IsutaODO5T6NyLJ7rYxLG6biRqjcgQSBCKh2zLvch2xeel3J6O6BWN5yZ7OA53gV7 9X9rI7dRXDs9vc1wCgisoHj35pO9gWCV/6KTUxYEtN66ONlQ8DzIvUWpVY9gpFGp4tDug69ebB0fa 78I9u6P+qFeglX0TRo4nSZb9SvXk6o0poFclkd/JTuj95OaY6jejpTZPquIt1tURKGrCv9tWfxFUT LGvOE7Ld5S5S/gc96/JzXHXZ/0wC8iI85IVL1Dt7hkWHhiNIazqWFqnLzjeyNedEgUFpR18ERMYrB oZfubB0VdXvsaV23/Id2bUfI3VyPwIQv8I4rSCTy/ab6Q4ZpNdpeJeJ2kkIuoFIyKK4H594jVBka9 +vAiT5thpR2wUgaik9LLL7GyYU9K1W3v18geg3exS8ubOgXN9CZtJ4FYgmxh9HEWl0hh4svXmz14y Oya11MpaZvTkDYHtNmCPp1jU; Received: from [127.0.0.2] (localhost [127.0.0.1]) by hr2.samba.org with esmtpsa (TLS1.3:ECDHE_RSA_CHACHA20_POLY1305:256) (Exim) id 1jWLdN-0006wV-Gn; Wed, 06 May 2020 15:06:53 +0000 Subject: Re: Data Corruption bug with Samba's vfs_iouring and Linux 5.6.7/5.7rc3 To: Andreas Schneider , Anoop C S , Jeremy Allison , samba-technical@lists.samba.org Cc: Jens Axboe , io-uring , Pavel Begunkov References: <0009f6b7-9139-35c7-c0b1-b29df2a67f70@samba.org> <62e94d8a6cecf60cfba7e5ca083e90bc8f216d61.camel@cryptolab.net> <36fd1c62-abfb-931c-ac31-f6afbbb313fb@samba.org> <27882183.aulKxNbigu@magrathea> From: Stefan Metzmacher Autocrypt: addr=metze@samba.org; prefer-encrypt=mutual; keydata= xsNNBFYI3MgBIACtBo6mgqbCv5vkv8GSjJH607nvXIT65moPUe6qAm2lYPP6oZUI5SNLhbO3 rMYfMxBFfWS/0WF8840mDvhqPI+lJGfvJ1Y2r8a9JPuqsk6vwLedv62TQe5J3qMCR2y4TTK1 Pkqss3P9kqWn5SVXntAYjLT06Qh96gQ9la9qwj6+izqMdAoGFt5ak7Sw7jJ06U3AawZDawb2 +4q7KwaDwTWeUifIC54tXp+au5Q17rhKq94LTcdptkLfC5ix2cyApsr84El/82LFUOzZdyRA 7VS8gkhuAZG7tM1MbCIbGk0O3SFlT+CvZczfjtoxVdjYvGRDwBFlSIUwo3Os2aStstvYog7r r9vujWGSf5odBSogRvACCFwuGLVUBSBw/If0Wb0WgHnkdVcKfjNpznBqUfG6mGhnQMv3KlbM rprYTGBOn/Ufjw7zG6Et2UrmnHKbnSs1sG+Ka4Qg4uRM45xlNKn1SYJVSd1DnUqF1kwK2ncx r5BjxEfMfNHYxEFuXCFNusT0x3gb6zSBPlmM+GEaV26Q/9Wpv2kiaMnNJ9ZzkafSF52TgrGo FJEXDJDaHDN7gtMJTXZrtZQRbUnXUxBXltzbKGJA9xJtj57mhDkdcKgwLUO1NUajML/0ik8f N0JurJEDmKOUl1uufxeVB0BL0fD7zIxtRYBOKcUO4E0oRSSlZwebgExi33+47Xxvjv0X1Lm+ qnVs0dCIJT5hdizVTtCmtYfY4fmg6DG0yylWBofG7PYXHXqhWVgGT06+tBCBP10Cv4uVo6f8 w91DN00hRcvfELUuLhJ9no3F5aysYi8SsSd5A4jGiPJWZ/mIB4e2PJz948Odb1NwMiJ1fjXw n0s07OqAMasGTcuLNIAhLV1lTtCikeNFRfLLQJLDedg+7Q+zAj1ybylUfUzmwNR52aVAtUGK TdH4Tow8iApJSFKfg9fDqU8Ha/V6XCG5KtWznIBH0ZUd6SFI7Ax+6S6Q+1lwb18g2HNWVYyK VmRp+8UKyI90RG8WjegqIAIiyuWSN8NZyN1w7K5uN6o600zCukw4D6/GTC/cdl1IPmiE9ryQ C9dueKHAhJ5wNSwjq/kpCsRk92enNcGcowa4SjYYMOtUJFJokWse1wepSeTlzQczSU32NHgB ur51lfv+WcwOMmhHo465rGyJ84faPR3iYnZ9lu7heKWh2Gb9li1bug71f2I1pCldHgbSm2+z XXoUQqjM5iyDm5h3JnEfaI+TTUKLeO2+wgEeOIie7kcCadDcBZ4YoP7lzvREKG07b+Lc0l0I 3kwKrf3p3n+bwyhAeTRQ/XcG/Nvmadx35Q5WlD2Q/MzsPKcw7j0X45f+sF3NrlEeoZibUkqn q4Acrbbnc2dZABEBAAHNI1N0ZWZhbiBNZXR6bWFjaGVyIDxtZXR6ZUBzYW1iYS5vcmc+wsOt BBMBAgBAAhsDBwsJCAcDAgEGFQgCCQoLBBYCAwECHgECF4AWIQSj0ZLORO9BJRe87WRqc5sC XGuY1AUCXZzbpAUJCXvJ3AAhCRBqc5sCXGuY1BYhBKPRks5E70ElF7ztZGpzmwJca5jU8vQf /0x2kmkQaPhHjxTT2amQO+GC7AEdyXyeYu8U4GwcH0vzEmLO5YWCFyV59c1I6+oP5cIpj45I tQvOeOIjM6h1u43JefnDanL2KMYC2lCNZDABgBm27dL7EBjzw4a0BW+COq1fdZxYp9rNZcVt S9Lhkz0m4W4heeSHV+9jOc1LdPxt5HvqwtRDRDAhtNbiNTsDqPOqsuBG38vR9MuBu1YBRaVv 7YxzQqGOFn2fmRn0bgiJkdqhCYabPX6u8Ei29TVkRaEFYWRFiQf+/CfpANin4znqef5F3p7+ qkkSwD5IOTedgeZ3f2U3clya3vQCO00XnAg4+SITYtBRBL24UVUZtwmnhxeaHbD4XpHz05Gn t6YayAr02fxNzbGv8TbD3QgHlfhVux2q+w8MDSDw563j5xOPpcm5Z/GklUBVcSUyGRMs+bdl mU6popnP3R+xjwfH2dG6gHK4MZkoZFDFJg+JiN/1M/1Tel0hu0mcqwlxX8ZIG4Or1d4Aw9ta gNrHVWw1zmOWDoU8ShUIGkzpW7jjGEQJg67BEqyEa9wXWkYnHK+8+7w69eIOTK+HYiTpNt/k H6iNG0XHkg23YhwyoVtESh5b9pGoWsyC3T/pEQBxgnvvgLHxcNYM64NY+9e6IEGHf5qhloaJ z1nsuyBNa0UoUzvm98rzrLF3MljywWF4bP+/Q6S08wHX3SmwOaspQeI32HNiiW03w9igoSB8 Xh4ZeKgNewm4+vhQBf6sSI60IxNCFiGdAW76yIB8ZxT2bjq90Of3En9GEPZVXZzb80zvkK/0 NBATK0HFU+SgkmJtznrUHN9QWHSjJzbu9t99zXfP+7mSG83k8E8YKZrpgYERkELcX76ejIg9 uXGuII2k28XdpO/8WROrFM5mpOwc+gBcqcpJERbHbqhPSpb5uJ2/3B5B3vU7EsGOsTLEipWF oZcpfm4TTWg0Li76/mf7oa7bQoJUTsJj6bJpA+t5qyYhMe1RYWyf1JtpydDdidkskfwI0JE9 kV+JfOHShSG+vFLrXx2GkhnRFqSbfQnnCNNgjOE1ikinCIel0QSkUcjx8VjL3SI3FNh3dhQf lHobEe2ZDJp5WbwBDd6e1x4xp+z1eAhCPuNCn7Nzwt7upvrpsng7NFlA9UIrj7DfCpoiR9iq YXrfIy9t4sgiX95ZCiNKKgppR6jURD9alSn8K+ZYJ/HP22lBT2TTyRDiD0STY1701GEliyOa g+RTWRpGiBNogsY1JqGC9uPPqH+eCD0a6tgC3tnNGeTD/enfySx0FM2sxmyTXPkyxKYrKfk4 RZMn+QI3XY3Vx5c9EU09oo4yYIvwz7U/7YkdIYqlHLgWDfPmL44JbYHUsQ3SkJxKxioVrrzO wU0EVgjjdQEQAMV4CQS6KeeL48/NyqeQG/ttlq82tuv2hcFwSFPlXA0A8Ky615khl1ZIygTA mGT7pw5Ki+y+B/CL8UY/ywPWcTnL8Ckn2FfbJd70ivQRxkx4APj0Oz94Yv3fyleVJbt6ELrG igacn+exlgNmfl3+cio6AAmOT3C/4fK//rx0fAP3C9DjDoHu7PilaTp6ZrgmO/1szLLkXXgR I8yjcid/qZ/5IhGVKPOQ2RERLZZGFcP8E5VfnT5WdP4j1IotDWaJSlCn33rrZZVWYCnO/CJ9 NceRMVpdQnfxgIeS75iEs8Zrcjoo4RrITkz8tfMvKKzzoQVIap5M/uoPjwwshZElNrufpck/ O+knUmjLd0cF6j4kYru/MS/WOlgAc3vAnYK7OlISRHdHbAJgoDQEgCcqo46U28ZcRjzyS4cj teqaer9sCfNu+tKHTQk1mdWyEPuv8lClmsIQLzc7e9lpX3/mxkaSgvPey5Z//HGyS+MssM9K iS7E6Wl7/P1w+dJ6pT1t3OR/2ZUhoF8zLu3hBs0ZSZNwNqgqX+2Kp9kd2X6fpHjg29n0Dt/F w5ghlOJ3YEJoHB4WH8qaJxWRDpBwOYzxSjq4hiE4OeiBvNVzN6ELu7c5XQpAyL86k0Hr0RHo OiiXgB4H+zGJxX1GUyP53bXZzazZl29vpem2nstlEHEQHlw7ABEBAAHCxYQEGAECAA8FAlYI 43UCGwIFCQHhM4ACKQkQanObAlxrmNTBXSAEGQECAAYFAlYI43UACgkQDbX1YShpvVbVaA/8 CJxyRPi9CxLpqWrFSUrP8PDph14QzOkZD65PkcYtCqBb/tl1TGz52+DOB2yob8RP80JLkJgt LlBnGv+7TagsJoM/USzy/bQ9ZIm2eOKd3qfMciwsFw7P6B4oUT4+dmoUOGwfyekkbpF/mrqP 4qZ4Y19kFWt77QgtU0DxCj6Sv+44pCGxMPkyyBFF87MT0yzhfSQ/S+r5XLefT5Z5dBO5jsOO uzT+Fl+Q/J3glkvxC+I+23RfzExwDev+xL4y6agoP3QQVqxb9w/ps82VUlyx6pjdxkobRagO KUJNU1PlQzc3M9CbVltdDU9qCKw05/tXDqzVaZ0+cNgrE2CzvFllPxBpbOjyI2nszeiPbRfC 0Q96otravCrC1ifkllbzuCGLvjm23iAjnGD7cJMFv+IWpe/yKrZHG+d469as9+N+sPXZMlzB 74av+oyQyxIn7lp1dwYo2e9TcV/9SMF0F3LfCyewDnfiMCTBbXcFu/+hd3OKABxWE/5ZgnOL B3z3NBf2FMnan9m4X8mXStzCA2QNkfyt866paI2vyOIk6NPdR0AGX6dXZnCsqlX3t2kBadpg kZQc33+3R2nFMmKqsF1xMaEzfgmjKMwbo6gT5PRfiqZOiKslLGCYIArJxNXOuYAn5KCqi6WU Li2cvPZqJvgsgvVYEY4DDsYGBD+DA7Ram0NDTiAAqLybdqbGqam4aL/olI4EIm7qfOi22D36 moxbGPJ9wMe+ZmNkVtudkCzxCtd/D5Du/voLq2pi3hqDWAdNjwNvKBFCGQ4ReI3rw9rYsLkG cWrV9VNjbm7xH05ZmmRjQaNJ9MXqk7XE5+1GUp9jB0mOCA2rX/LYJVHnj6Ss3RpMN0vwZlGq TxvhCYOQFow4obHl4fQR8jtRQb33BWiJ/oMkQHMVyTuWoJWs979Y/r/wMEytf4D/HIuSi+oo wBZdz53tO3OWvRHyX3fVrEphAQIC8lUQfFH+WS+Go4KSxa41hZRXZdm3tw4DW5iph4rNxf7H uyIaiJdNU4VV5gSi5fp5RhVY0Rs+ugcoZKSGj4UYBduW8zLytga+Zo/EkliDSIwqfXAikIyY jH2sv3zzc6in8u+hcgRRckSRZnQ1JMsaD1MLljniaGKIKqVsdem7XFaDJSDaSSRAJ7PYUOax i2JQm95VJtmoEmhoRdg90T2aETmycCkrRWAn2pu0+7MeVcs92SZnnYToXjbL0Pr1suoiMrZv 6URZ5H53NZvFK8SrYTbjXPDt4Dia0pAptiRhbSRgqS35oVDcheYsb1ypKuSdmC6nJVV74wED fh7UdkIER0bELAklkGpFiAUhMVna/l0gvJw6v2gP+H/eE82+NyNFXFHJ4H+mw457Y2tYBhYj /KnQFfXocr1vUqqlrhGmHMB/QN2X6xUNJIwI9n868BjYmFQc51ODvRJUZlIi81S8L4ZnJIP6 FhwYVpVCl39zds6e2vDv+OYux8D8i9nFmsAlnh0LV+3sTQc8Ydy5XJ/SzD2hpFU2YZtmGXgo M9N9lkrRjYHaSEWBPc+hL2rlb0z8wLZcUBjqxBKuqCbFvef/DkEqb60zkfROm4wqOt0ptsV0 x5JhMYEw0V8ABVPmVc2Z+ovO3Tm9cvKm6gvF29wDHbBHexK1oUPVGa0YJ7y9RMF2MTGUE3JF yT8CsyG/JXFIIk+K6V0cp2+gUno7hZKhZojO33L5vByGjQX7wrGERSwwXW3r1duwp/pBWH9s RlqUc5CEBxkBeKUbQvKjtqRWftafBrgen243hCyu0wKOAh/0wR6Ukw3bMhH3YosZJ7ki3kag xEYUPx1pY2uBLQZkZaUCu34vCpd0LyWQwMeM668PqhhYJDJRNOaadaZfRUU9wVNPPaJ1uX5Z TBNDajl/a/gUWQvvQUxquZ9NFqz0Nd3hx0LhupOq6Qdqok4ZlNTIQZVLoOUB83hu/9vSsITf UwuE0w1Z+u/2xzijpAJxs/Z7RLikJ7Ts1++OUxCEs3lkfcCuTHQqnMQb3IHEk9++pzCQTV+g 3isgeVM/Fea7OkaKZIEVglj8kifLrn1KjK+zksLFhAQYAQIADwIbAgUCV/ZWSQUJA86mUQIp CRBqc5sCXGuY1MFdIAQZAQIABgUCVgjjdQAKCRANtfVhKGm9VtVoD/wInHJE+L0LEumpasVJ Ss/w8OmHXhDM6RkPrk+Rxi0KoFv+2XVMbPnb4M4HbKhvxE/zQkuQmC0uUGca/7tNqCwmgz9R LPL9tD1kibZ44p3ep8xyLCwXDs/oHihRPj52ahQ4bB/J6SRukX+auo/ipnhjX2QVa3vtCC1T QPEKPpK/7jikIbEw+TLIEUXzsxPTLOF9JD9L6vlct59Plnl0E7mOw467NP4WX5D8neCWS/EL 4j7bdF/MTHAN6/7EvjLpqCg/dBBWrFv3D+mzzZVSXLHqmN3GShtFqA4pQk1TU+VDNzcz0JtW W10NT2oIrDTn+1cOrNVpnT5w2CsTYLO8WWU/EGls6PIjaezN6I9tF8LRD3qi2tq8KsLWJ+SW VvO4IYu+ObbeICOcYPtwkwW/4hal7/Iqtkcb53jr1qz3436w9dkyXMHvhq/6jJDLEifuWnV3 BijZ71NxX/1IwXQXct8LJ7AOd+IwJMFtdwW7/6F3c4oAHFYT/lmCc4sHfPc0F/YUydqf2bhf yZdK3MIDZA2R/K3zrqloja/I4iTo091HQAZfp1dmcKyqVfe3aQFp2mCRlBzff7dHacUyYqqw XXExoTN+CaMozBujqBPk9F+Kpk6IqyUsYJggCsnE1c65gCfkoKqLpZQuLZy89mom+CyC9VgR jgMOxgYEP4MDtFqbQ6vtH/4hRJwSwklQTq8A0WqRz8edCqd/jbbpPyXtMbghB0XwPpwEWFUZ WSl8w4CNBs/7LynUIDur4n9WB+sm7lmVtkcAbWAFWF2dwAdhhntXiw2654BGlL2LZaLm3rKq hepSOSzc30rWWFRUtqA4wj+5JGOdW6mtjopLR1fFJcVTmMpuz+5AwMee36TSAgxeAXCZTvLd EIw8UlbjEr0SsrXEdQzKpQNOqwDv2pbbwPKB4cea5aQNaSgr5EGGNaEcMaRKafD+aQAwGlTw 3/If4ZdQYt1VTEr8/OuSt8K7sE0xoYz9yO4Iuu/CZ1SFFOR873qL9Bp0pQMMPK1S7yUtXT0V CZ8HMazHnSfZJocghWMxXKIHyGtIY0rLJq0+DOzgQDH+EZn2j3LoCzI7Lsua+F0XQIluzBBQ 26ME74DzoWu+Y5AvmSGDBhHFBRt5yTwqMTQ1iYrytocOxux4L4E35W5akPZv+wDtiTzocfz4 dr32fA/x3jfx2ki5Bqm8BhNA+3BYTLGmZWqBmeRSYWb9K1hb0Mf5UWJXn2cpJyUFXtbEqIdO iO4PF2q8bJ9XpvetKOh7taPtjJ6OZIf6fheD+WpYDsdPIwjkDbQ3kdOeVm/P3w9ScaPlFUnb pg2Tvg9v2SGKDdc3eLYssjLa7EdeEus9yZawfB7EjfNeaCJQqnsslcO2If8Spm1ls+FKSYdH XFPMunf9K3u/A8HEVTzl5q4iX6AOjOTKDiCSzvRK+OXirGAr/wzDsEQKtWbpEG7Fgb3Ou75+ DsFWC4FUFOYSP4qyga1clcY0ePKNwtIg3frOxiQY7Pd8WR3qkrKfnk9V6RrlZzuDBey8g7ew NdpMOWQyOSC3VEP8gvzWgFZxF8bYLauTYzdcOhrx4gzpbwyxL3hO0BKzn/wvFudr6N2be/Nj mhfIQ7un2hIlgN+mSSCuZY/DaHMpiFSXhFjLbCEpNC7VcwPlIwcVZRvLCfCo00v/uSlaXImj 7m8/uyc3Quo2hBmyavMy3k1aXZ8ejhVDiOpzvFubRDvRkOdSk4VQk+Ony4fBHbnf8YFrqVjU qZ5Q7iaozk3q0mVEYBPo2hRP4lVj/wpGvDWFBL3Vfu0JlsCh4reXcNYVLkM/Xqrad8MtvKx3 lBAEw0IHshmLZARnC+4QoRqqva8Bp7YCpu29ag0hTbRn8A//Q14SPew2Z1h4xjeu2eZqnhTM 7rBCk/jnPxfC26etrsFA9a7TRBYmRg6NspSCCy+cvt4zzvqUGDun3d7ZmM98c8E3bGTX7825 CMTKY63P+tHhUBWogJJhuM/EAqeN3Gdq+nO9ddwTWuKHJ9f2IWgpLaIrOR3FUBJ3upcgN7iV XRzWt8tV8zqDRF0HOrfrwsWEBBgBAgAPAhsCBQJZ3vjqBQkFt0jyAikJEGpzmwJca5jUwV0g BBkBAgAGBQJWCON1AAoJEA219WEoab1W1WgP/AicckT4vQsS6alqxUlKz/Dw6YdeEMzpGQ+u T5HGLQqgW/7ZdUxs+dvgzgdsqG/ET/NCS5CYLS5QZxr/u02oLCaDP1Es8v20PWSJtnjind6n zHIsLBcOz+geKFE+PnZqFDhsH8npJG6Rf5q6j+KmeGNfZBVre+0ILVNA8Qo+kr/uOKQhsTD5 MsgRRfOzE9Ms4X0kP0vq+Vy3n0+WeXQTuY7Djrs0/hZfkPyd4JZL8QviPtt0X8xMcA3r/sS+ MumoKD90EFasW/cP6bPNlVJcseqY3cZKG0WoDilCTVNT5UM3NzPQm1ZbXQ1PagisNOf7Vw6s 1WmdPnDYKxNgs7xZZT8QaWzo8iNp7M3oj20XwtEPeqLa2rwqwtYn5JZW87ghi745tt4gI5xg +3CTBb/iFqXv8iq2RxvneOvWrPfjfrD12TJcwe+Gr/qMkMsSJ+5adXcGKNnvU3Ff/UjBdBdy 3wsnsA534jAkwW13Bbv/oXdzigAcVhP+WYJziwd89zQX9hTJ2p/ZuF/Jl0rcwgNkDZH8rfOu qWiNr8jiJOjT3UdABl+nV2ZwrKpV97dpAWnaYJGUHN9/t0dpxTJiqrBdcTGhM34JoyjMG6Oo E+T0X4qmToirJSxgmCAKycTVzrmAJ+SgqoullC4tnLz2aib4LIL1WBGOAw7GBgQ/gwO0WptD LSQf/iAmwi+NMhrK3M/IuuQbjiDGkYp/orV939ci4dEWyfqK3iCumAW1i3L96087yffzKhf6 zAZd+xPoSM+bA20rozQYTBAlfZxtjYB3sP/IeG4zLILuaEhf/09i2TE8cZgI3qEAQmlheSkl e6SXTghW+BrzR/vLjmSDnk4RV0RcRN+tasHIPGg+n8K5f9aI3UfIXwGqu3ZvYzbLnklnh6X4 EotJX3hojgYRkJ/iqQu6Kg/BLb++MpFmzcZAMFv3c57M6WnnVDOQr3GFJFlF0GImjfLIz2PY PpGVs/NvwPXPtq2wImJ+MNpp1EgdCeVP53wl9DwtBQt/R3W9Z1iYEJhtXJrl9QB3rHBDIy9Y i69TIOPFwh7xYmsNV17ASr8iEUYwO12+UnrCt/Cx4JohAdTJSa77trPl7EpNXi5Kd6XJxmvH mxN4qwdS01N2zVab8fel/njqPoHqvTv/u/cIWae6ANBWDamBQ9fsqJcrrn05MCZQPqVcguSC 2xpdajeCBNQDxlJxoDf7mLxpDImhlVz3RQid+du/sHjtK4TrV2ibe9onp3x85ff7uT6TWq63 daUVEXAOBmqYnvHPJpQD4akvUZw1JR8mutzlvhawwi0rBR1aRLVaOSnrJ06X7h2mRPs9Tskc s9ZcNrDP8Ld3P2b56pTnlAEyJXSGBL83PPh5ebuMerMBG0OJ1V6Rs0JDbvdgbx7ZoBwCBr4x EAj1XhPP8q+9hAlp2M7+qX21Agkhj709+yHhvUe24jSXf9Yq9Y/gG8evL0aUm+hlQTDfu7+A P4eM+z6MvJGIvAzvw4o0BBcWuICtpIUhHlqN35fSTpqeClP8VgdpzgPyT6yZk1qkDaPIfJax pE7RWJO1o+bd4rykhS+piSI4oUfEWcljiarqTyuDdey1N8ja/yFMak8rciXrBEL8VNw5mev6 Pqe8RcGaSNbB3KA0d4F4lhNOUr5FiXSvfKezSld+qxlAU6VXWMXNs1oT9HJoROZk/Gc38ENL 8w3/c1G4QFXwnmAFa89hlJDY4SZD9TIgRIn6JpiLx18dGch3VmtME7E8VY5UXVt8pb/XWcze kRxIL9uRtfjLjpkZSrLA4jPDdWQf1Jh8A06yvmrWQl73WZIRGj2PrD6nZlscrZUguk+aDYVw 798atmETUNwfIfcLiOy0BYK5A5cVs/CQqpbkS55eLFT+5S8qbPLxbpy4uqybT+/86S5SMDog zeesUDH5b5n3Vn0MZbWHEqm5HU/eFEaVnZGPqmHwJeS6UycoYBdWTyCywqig8rfc5CrwSb0w Ri1/cJA5GemtFv1SNX3ez/PG5qe4YVEiBBsEQXAHy25ub4+z/fCPDXmZ/gbL0xvNpoJdtgvn jALCxbIEGAECACYCGwIWIQSj0ZLORO9BJRe87WRqc5sCXGuY1AUCW8CSCwUJB6YRFgJACRBq c5sCXGuY1MFdIAQZAQIABgUCVgjjdQAKCRANtfVhKGm9VtVoD/wInHJE+L0LEumpasVJSs/w 8OmHXhDM6RkPrk+Rxi0KoFv+2XVMbPnb4M4HbKhvxE/zQkuQmC0uUGca/7tNqCwmgz9RLPL9 tD1kibZ44p3ep8xyLCwXDs/oHihRPj52ahQ4bB/J6SRukX+auo/ipnhjX2QVa3vtCC1TQPEK PpK/7jikIbEw+TLIEUXzsxPTLOF9JD9L6vlct59Plnl0E7mOw467NP4WX5D8neCWS/EL4j7b dF/MTHAN6/7EvjLpqCg/dBBWrFv3D+mzzZVSXLHqmN3GShtFqA4pQk1TU+VDNzcz0JtWW10N T2oIrDTn+1cOrNVpnT5w2CsTYLO8WWU/EGls6PIjaezN6I9tF8LRD3qi2tq8KsLWJ+SWVvO4 IYu+ObbeICOcYPtwkwW/4hal7/Iqtkcb53jr1qz3436w9dkyXMHvhq/6jJDLEifuWnV3BijZ 71NxX/1IwXQXct8LJ7AOd+IwJMFtdwW7/6F3c4oAHFYT/lmCc4sHfPc0F/YUydqf2bhfyZdK 3MIDZA2R/K3zrqloja/I4iTo091HQAZfp1dmcKyqVfe3aQFp2mCRlBzff7dHacUyYqqwXXEx oTN+CaMozBujqBPk9F+Kpk6IqyUsYJggCsnE1c65gCfkoKqLpZQuLZy89mom+CyC9VgRjgMO xgYEP4MDtFqbQxYhBKPRks5E70ElF7ztZGpzmwJca5jUElof/3aLTvgIOdLESXmNinVfSst2 S47+4rsgYyb12KZV2iCE3q22VcKeXdT267E+KrES2aAAzLtvpwrPunAXnDKS0ttBg3XWl1bo hPyifw2fBCIJs+5bBC8dtMvZcMVFQQKMyKayBsFM8JvY7qet9z9Lzc6pz+3teT5QyAtlf/Zj n5U2th2N9ESMNjR1fqPdqYOKkWSgxBudwUk4GkE8odlRZLpIxpZX+RZJIoy01H2nTxUy5v2B 3fDijGK9ntCA2T8oBODo21vyCpn9VSBWp6ecOKop/zNm3Tylyu3F8+eslv+MyTSBH4W99/OJ 60R3jCmJ2RnA30bH/6iYFafnMZqp/GvhZ65dXQKBORCeaY3JKbZGHJbUHq2tbXzE7ttU/zcy CwV9qSPcD/X09CzR4ifp9Dz+Ba6yn5o406VeWg59cUjZxDi8B2kinbazklb/Ke0ZuDffr0Fn eYzUoFMiwUHU/XBAE6A+4tA+TWvFzJ73dH8C7SjQ0BiKfooGmJYlMi37l9pT35xdHZ61Eixt 9u90AMtm++nAMmmJ6Wok1lMt1NHly0omaFMmqpQ1jtFJwUs4+UbJgCzqE1YKeYuECixZKX1O AxeQ1rXJ+dokC39xCZM5ULV72/i7qBuyUx6hWeCHnbtzimJ26Dg5xaFQ3THp0GN1hXtZypQe kxul9zu+vohCah93JC/GaPlXs8Yy7whWRlnxQ2uT20Zg6rVsYM166xXL19uCKUj7qFw3KSnp H1Uo1fDpnVu3loYwDUHVQGNZ5sLWYUlyPq8WnD8C3zPCqn9/SfzGYQUobc1m9XMSWRrFk8C6 HLOv0B8nQ5wGnq8LQmnKqyudt+HqB/H4/12o60mPVUkHvj/3SfZaHKJ+iP779x6cRPLJ4DqB kQOCfmTTQPeDeOZFjLteZirCWtKK9d9sa1WyReOnF3X4ITv2a4huoki40ATAxiJRJ7xii45t qObf7gntYyhTM3kYA4MzyGLmCZQDSwPvEjSEoZ6XJUYG7FysN/NwyUmojnJ9juCeufAVStyt WVXrWPSG5KJM4FwKHpQ/neoO7TBoM7cbtigeAKGy87tTbtyNbZUtw5yhZELKp+QP3KHvhPc8 lCagpeDlS2573/wwH6bPKuJC2M3ha8LRlp1cagx/cWRMjTM7IU6GrS4t+5zHPpG6MilhzumT kijxcNGTyOOydBkWSlcBaG6EpJmCvOd/V8JdTdBzftnzDPDgOMnPY9Zs3XnD3lNWWHcTl1yR UsBWtvzgOjxvHScIsd74g+vlknaWISH06ttUkOmBS2BrHU838/OrDxpDmZYduTbJL8hBDl/e 4k7f3+VpAq+s7d0gZzgknh5AMTHtajP118dJcOACo8ey/l/CxbIEGAECACYCGwIWIQSj0ZLO RO9BJRe87WRqc5sCXGuY1AUCXZzbugUJCXvDRQJACRBqc5sCXGuY1MFdIAQZAQIABgUCVgjj dQAKCRANtfVhKGm9VtVoD/wInHJE+L0LEumpasVJSs/w8OmHXhDM6RkPrk+Rxi0KoFv+2XVM bPnb4M4HbKhvxE/zQkuQmC0uUGca/7tNqCwmgz9RLPL9tD1kibZ44p3ep8xyLCwXDs/oHihR Pj52ahQ4bB/J6SRukX+auo/ipnhjX2QVa3vtCC1TQPEKPpK/7jikIbEw+TLIEUXzsxPTLOF9 JD9L6vlct59Plnl0E7mOw467NP4WX5D8neCWS/EL4j7bdF/MTHAN6/7EvjLpqCg/dBBWrFv3 D+mzzZVSXLHqmN3GShtFqA4pQk1TU+VDNzcz0JtWW10NT2oIrDTn+1cOrNVpnT5w2CsTYLO8 WWU/EGls6PIjaezN6I9tF8LRD3qi2tq8KsLWJ+SWVvO4IYu+ObbeICOcYPtwkwW/4hal7/Iq tkcb53jr1qz3436w9dkyXMHvhq/6jJDLEifuWnV3BijZ71NxX/1IwXQXct8LJ7AOd+IwJMFt dwW7/6F3c4oAHFYT/lmCc4sHfPc0F/YUydqf2bhfyZdK3MIDZA2R/K3zrqloja/I4iTo091H QAZfp1dmcKyqVfe3aQFp2mCRlBzff7dHacUyYqqwXXExoTN+CaMozBujqBPk9F+Kpk6IqyUs YJggCsnE1c65gCfkoKqLpZQuLZy89mom+CyC9VgRjgMOxgYEP4MDtFqbQxYhBKPRks5E70El F7ztZGpzmwJca5jUG0Yf/i60Jck7M7mnI7WwgrtTUTRKTSxH5UmKdC/EqzMuRZOAQaeZEKLX mhgd7lAAniazHEB2RrUc6VaiWFI+78674SSDzK//LpgPpOHfZLSk92oqt4Lja/+/8dcBklhE TcSLjdqxaanRezqxt8QJKUAokaaGo1IqnHxlfZ0RWRxdVO1bfqWz8xvH57IQsyJsyheHAYwP OW8p6eH7N4Cpsb8Nl1p9MYb+Y0E1W3ht5fso0UsowMbH1Ws9BCKvY6/XuyEfHlyrPcyTNLTs mKC/MPej/HjtwGK2uDd1dhVvsmIFBPmymKlYJEU/S93te196d/QbWOVZIBjnRIspOICJE7F0 ZQHQkORkRvn7rUsCDkWq29LR2p6UtDIafqRc8XXZ3qZyg4nsnvW0enJWUUSNnAR0fyZLi/OP DJvtxY4pgl1AObqBSamCPthLJV9RWDf16byZe07ShlPzREKCVSesg38SW67+cJZzO6/Rs7O8 S7dbenBYi8BrNmt7NtEV5tOAvomIwwbamjEUDRYZzHaqrEui2WlJ/ETJ2kQrGsgT046zAYDr 8iMK3T+thXiz7lWtHT0rVO3Cd56QBa9rgKN6WSt/hvh3ULcp1lhHKPvcQVKa0AAJZJGKtLFV sCpPfAox6GMlQ5rizTCBZQtpLtWJWCSsn9yh3a1eLU1EjDRBnC8pfa4Db8zTtsWrb+/mIs6x 1xgHTvRLq/f0gmOWVeuSACgLaMi/llqIsEjF2oTJJGvM346CzwShF5CB7fXr4lQQr2grT80T qsAvdSBu37MNWq83HfU3bJ09q0kKoYzjdsK45xVkuxZYjl1/x98RyH31JICvJMeg1O3Kk7Dm KeuaAH81MFpgFEvFLOJcPVntvVrCPT6uYkjH/54w5PY4rqVxcU0YesfJTKnftJVNcO8B4x0D uNh+qgLPMV4ofTgO83oAxUuNMdqx8Fmzh/eu01rTOL2M0Q6VpIjv9n4gF03d2RIx9YyGOMBj +M+2EWU/bIImOSAETnW4FPy41btZVBM2qTB0acDy93HTXH/iuvsI6VzIugvYFSL/6YcFBBwP WduwqGZHldPKKCRCPrv63sBS75VSrXiJojyUEXw+xFfQAFLeOk/evR9JLHHrvQSPbEZTwE87 nUKrA8VNHlqCCNb0ra8ZNFVT7zEzBtcKWujL5Q69W0hysXvf958lgNCc5/TCDDlxy04QHVTc gIdDdsh//ARPt2QDjQU2mxONiGBrmRv+yUc2POQnRjd0J8nqwBxXq8SOi8XZoOFjaXdEGcBG FPLBKi5GQgVfKe3QoVcAXmrQJouAfbyjUxOWNnTI8GXDRXJ7ey0gTY0JNHOJ91Or1Xbrjril cCulO1pDnao+l5Oy2H7OwU0EVgjlVQEQAP3Uq+NZs9L9Xmstn9rM2PDK4JOEE9+iNR/eWMBc xGR2B5IWyPXL2yM/1pxYUPQzzmSK45kbJzDa5plJ78qfycWq+oCAnJ6ZgOZ+Tl+QVL6BaTrz WpUmjL2+LlpgjQHJdZhyd4EJ+eGUyKCEnF0Z6n8TU9rQeQufeUqP+x7S7jQW0bTk8oU3hIOp LY17sp7vun4oSEAWL6MKm0rX0B6YUrLxhE6Ga/ZMRKgTvtlo6ujKM86SnoR4b7C3JBxs+SaI qM+oNArBp9TYML3s80uplfOPao6UZg0760MtJ8x7oed0c6fUgT8SjItDJrsPaq5pm2hPULU1 aPQOl4ems4h/anTDB6hUj69FOoSaXKciyqvQZm+ku0gmPZqljNSQXgmJjth+pHAYPTeIh+8T LmUlt2It/zFrYreQvnWE23SSePcg9lZ6MeWXJlisSbNbdZKcbacIlJyvIDZtyrQoE3QzTHJK quEDHlxilcfa9tGevmSvhFo+LNAOLkGD1nD9lL9iWpel8VeNP213mVqvmOPdJCyTSBCCaeCB W6Cb+wgHSe3fPiNLVRvgIDKqLD1aLhP4D8csHQceWS+We5v+4Z5pIJjzf25Xz9GaHulBcb62 IyCk7l5yIqCNhU+diNvY6EiVk4Krol8pqVhRtWvX3JcKgBqOLyPlDMr9MdZMX5F60CKdABEB AAHCw2UEGAECAA8FAlYI5VUCGwwFCQHhM4AACgkQanObAlxrmNTwqCAArA2wBQTej9ZzdLjd 831w8dxygfHcIy+KOUn/fX2h/Hb+BrCx9Rn38D5wEfFFfhRxxKFQ3XI4HFkFlcB2momQbJYv t+4n4GasGhtVfkjvGLo3nAz6amswChW8PtrU8923PCuRVn8tnVjNb+vhh1A/E+GGwod4zTeg 0e+bUb++l20jkToDIIDTfMMOQLEd7pawTo+nu2nKtS/CVlVXK+PzP19IXNzdzQUZWr0OdXcO eLU0HLLnyGC7MenRjQa8eMbrh+U6wjaonhTvSIATqO70EDXGPI2T0uINiJH4gldy67oSzpGg Ay0yDE3Kep+8COG8ysUizrBANqVEtprAswqWpY21Orwbo+sgTszwmDBYPaptF0TdJR4Rdl14 vN2C3f+E8dACoEkHS4zHQ8UTKUpkauR18+i2vn4djX1YelPbGZhQAozDLL/t7IkO4o1Y1gby 83K3gooARlkCb2TmFJdiIxN6wB5SjJvYqos164EyS2D4My/Ua65hgK1b9+RorVKkSikQQ0I0 Fqtud7nm3X7nN3Z06T14Dpc7SJtCaj8nJ/8/QofSHltYnBLu8gbKRdXxQ94Y94F5LqJlcn51 J6I2/JytCStg3qrwS+BLzrDdLnaFnV39hs/i44CZSIJPgm+vKrYrkjbGWXapuGdUHQBhnmzh 4ZAaAWZYgTJ/mYd3fXCS3VYzf68WWyKhbkhYzBqQl7Q66oq0ifpoJSC2Pd7Hc9fby+SUwVn/ THOBGahliKvo/6kzBTOctQ5UsW36RCjLxyn3PpsHbzgV4C7Ua9ESkqc1PF62ym8nTn6zMG1m myA91eudXiX4+6TpMYfHlZki0yalFSGCTuk9Hu8XihQFVymDH+6JmMK0yQd/i7CtVtJfzzPH wOzQD8i+8ZQJ8jGOlkvXX9rr46l7d+hIRXTc8UkSJlDgzVQqnKTQt2ZghBjDVYd6BcBsbpoh 4yio6YTqfwlzl7oxMI8rhZnLc8bTToq5czho4jz5ray39ds70nQ9mw+0M6RJ1fbxUf0qEnet /m5WXDkrH+aKDMRxt+5CpyRH6HXshCUWqyBO/c52aniIZCBENIzxMAvH+Yy6l0tWjzFrjpjR 7Z/cwPPHZNrx6vYVz4tr9ViuFScSAVh0FlMeCtWhgc7i3U3IN/BCTmupoZCklR/mWMob1Yly o7UHWPWlIEf+X6kH+WH2ETlcbTjihzQ7EeE2ADBIquNHxUHmM0DQmtgn7ZINFoo/jvdLfBd8 F0A6hXOSpoKo8AMhZwZYkaQmsRRajGxO/tEg0NQolqmDaj1+Z3Q7bpnVbH7anIrdpDS6+7EF zHsoEzmMmf981JaLQfRNzhSJui/5IbhCEeWScduISIMvQYVrdQ1QHMLDZQQYAQIADwIbDAUC V/ZWZgUJA86kjQAKCRBqc5sCXGuY1LImH/9cGZQ25leAhW20USpcq5RmoR3d3cJ5ZnMODi6a 4z9Ej7Cxg2/cuvJzksS5lOICaKzVX+dxMQUSQ7xiPAOMQJDGFbIWIGAcPBNF6KMAQkMO52D0 1SiQ/ejaHDtSEA1/ycDKQ19U0cekUhg/t4iUUQJyabAqqiwWqGZfVSHWC5vVqfqkEGaPd7Jc JolkIG9iqI7W7RfPpG5UUnoLm4sD6JUCWiTRVwz/eWm/MVHa2K08LlswJKYBSqMM5TZ6ptqU mVa1yYfdzod+UukWxVbL3zKi+29ReEXheF0i74l33Ty+AymPIZ1metHhq9rNMAyYsCwHRB1z QkKAJ/M8aVphSQ2N+p7CSbIELgrEg6rVUEq54ivWMBOmZY2z+MZmh+oJhxd9q4LRRt6xxoK8 u2Ou90DcZZB7Ehx/TKJU13QWWbZfGECWjDx4wMVDQ8kzuRtRBAjrxfnG/VECh7TnEwx5+kpl 4oEdqyEnAtVcdXY9L+Jc9NY8mrm5rhCaKaugS4rEjSyW5kiek6txDYjp2Gk2yC69pWAf64tA 4+TJdCt0JLxYJfxane08Yzy9XOg9T1MnAicocz7kFAyYPVWKF3zvegrCke3jnFxZJOd7cuGG 0MIrKI/yyAlZiJFNB6d/3bEEFC8z4R4xpm6rNaajORKg5oOl6lCN3v/9QVqxHkR6NHoCujkM r3zzUbWaA0AaDt98LGt0si5u0OrLrrIAkOpt3LkFD2vLPuDVPpim/SXh1o91w4H4Lpr6cwrD h34Qg1ZPtkS5gfOMMFDMw5XnmjYxw/Jja6O6DztNwN8OOKlxBbxAHgtRG9cyDtDDokwPLQzK 6h3amu/FEKDYnZgVZOjr8f+h+oPvPdKqB56xkrFsrdQrSyZUHQLiqjUReSyVo6g6FAE58L72 0xeLMkfJL/L9WQ5/g2N4K/MOVCNCxTv1DxZxzLrosBh9DZN17UBtxeDwcxhHIlY3OGXaCQf3 q2wZMf42l4c3T/CnhuTp4iSgj77aVZD4tAuBYky+VLrhg/xuLCYpkJVnotiMFYLmik5GAIGV H2gElecmbYQ0wxSRKBfjS7nhtYxyWwrP9N42OZLLLg6+FTIC7VJHMr33FPEsEhv+wqeqhopz OuxkayLvl10pMZpwq9ajQDg2LjcZmwzGfhAOHFjdHzu/gmfkLWofsPFMdNf6ffNW/1RoZdd1 SZBXCqbCbtRkWUE7HxDqGNNIXt1hJ8c15B14A4NqSqWJRVoflMx2MyAR8CKEYIXJP8S1s7aM fIxSL83ln0OHuheYuMC0VY0llKlbGWi3nZDp+UDAXmdf8inr6mekIJS9xYr+DRXwurTcAeAC XJp1a+wE654OSsc7MGAQGbD57JV8Y8WrwsNlBBgBAgAPAhsMBQJZ3vkQBQkFt0c4AAoJEGpz mwJca5jUo9UgAKhR/Ad2sKRY3//JbB/WANjJBsN5SD5mdc3thWzSDOg4qTPPuB/jBsfbH49y SetLmjacSZIBXMLwQVxDH9T0ai8msoDY6oPyckmutZG8Pb729xuEue1XSMYB9bqZNqqjXVyc 3Qs8TJ4Ld9Kq8O8t/4i/Yw2abX7l9nC29jupA/mVd9X6+BX1FGgd5bVIrulSxti2W+xctStv xDBuq0t7KLlfuBy5Y6RblLcCYFuHv9NsMeZyXi411kBW/kcvx84xG0Jbt+GQaQtuMH/ZhRJs Q3aeJjo0ZRiQpIZuWi9vE6kd2s8kwbR/uTIbUcpAyfNcKvk07acAnzfCwKviRTrzTZ6GIQZg fqYun5BRh2+LR0Xqyu34xVQyojpa3qfcE70Uk33Q2xhyUjEpG8vyHYLPsg69zo7mQnR1kjex cqJmjRP4Qq8iIVse/7JkewwzOh47pRN3GCaK8ww1Ou1DtBBpkebD6wnFQa/Q845nkdyYN/j5 KYnadw9VjDj8/Rnk/XpjIRaWdRY+7qxPc41FljYJxv+4a3Y3QnzpDZurInt6tsH1BhDy5Pzr Iw83J2Aqws3gTzWphPyqkep0qo6CxTy/6qyefqOgEqPORkqBYNcpYT8rIqCbuCUvY4vTmom3 aAen5xuF2cPo5FS7FsGEI+lu3K/R8V5M1JM04oxWW6LiUJieEGT/FH7gQlPOAdI8RHaY304j VBSSKnsXU30nya/DEMjXCtMHh/vR03kTdX33xa550ufyfajJM1SnX9aRcdMfWiE8MZjzmpXG yx7gHByEUMb2cHnfujcR0ubCXHh2PVoB0DL0XxNp21eDA91XLHDp4DonqZ02qylz8yWGzHFR 5slhR+iQW8uAirZzmF0F8+7ZPe7ZncGkrE+yiXSWzb+H6AW4leir/cdso2SE3nnPxG2ZCNxU dJZZUvU4Ag4clYcMJnlrTVGNnH41Go+g1BpVqCzdt3bof34q0DU1dDNBTrM13DVv3Wyk/SYW HbXqwwyPTsDQCjH/EQ+z2O4iMYpbvDzJWhEf9/CjsVKGz3HG2QWjwPuNUG0/64EG0LLgz910 UTYDtW86WBpl3k0KieTUogCBrSKKmbk1B67qULAZVAtdrmnOv2CMCMxooJsUEjRRxMDGCvFK LGXhgoyImTGvCNto3Rrm5dxEuPQxbDwI8aYI+A+/ckguGRzeJAiQSLCyqgFsBlMsbON/xLAG OIgVFDCGSZAab6PaNmDhFwm/puBwBhEHWMVuBEOjBIfvNK192bO2HALW3nOS959p77rkj+Rs w49j3DuYZmfMubQJQvtfDtY7X+E7pXsi59HvTq2xMsGl9/E8z+mNyOzdWJy7zoT86lfM8NHM nwZ4pv3X5TbCw5MEGAECACYCGwwWIQSj0ZLORO9BJRe87WRqc5sCXGuY1AUCW8CSKgUJB6YP VQAhCRBqc5sCXGuY1BYhBKPRks5E70ElF7ztZGpzmwJca5jU7bUf/ixoomIAWv862/2foGst GO1dZM+yW2h82lTuXln7vQsw7H/zD1Eq1qlTYRZUnnzX/sQvjFY/lqZIu3GNqiqIo/NcE22z c7pdX8tktwO5R04cc31wgQ1Z/ld8r3S/x3GaohsfK3BOJMxSSu1vOIFxQtmBPO7zSkW1X3z3 jJLQC6wyDkp3Rg4k9spm4l8ZuKYOI/eN00hDS5iJnQFkbNITt4p5ReRbADvYzuk0SHZrcgT6 4c/Hpp5KTL0o4EQNXKcyZOuEeB9UgStse2VwqByX2iiEYOXd5GOqiNa9WySsQ6zhUjY2YmtQ l5bnNdLJVVwdIvQ5aqafrcJNs+Rpw+KyN3XTBI8elDV9WC0vYajXxjub694pCmWUlZEsdtV1 F9C19+7Ah+JdKXEvJDu1ylm/TjW5RcWpIszxoZbIyaGN8+GYXY5yVRx5JF4qKO0UvqRlYtEz BbbwC2Tek+GxMT+HvXO2/ghCx/8yacy+u3XCNHPMqNCaSuLQQwoVv7ucb+/ik3YAxgIPc7Wh kGFV5PRAdfANeQfQEO/30GA2y1/rEiCq/EH8lmeuD/HEdVQQn1gk3vg3YP6ebWm5xPFSZVg9 z3WP+JKa++Q4HAfkSnqRViWZ2MhMrmVDnkhISBuzWsxJjeHCnVFvqgqYZ+SpLnfV/v4fzKiu WA3yAp5IXV5nanMuuUO/52PHshi0iPBk8nrpegncjMsaLVwATEoVrIfY27dGxYvO3lgqq1Xc B8xVCWpTFyEy44KZaG82igP7rFkqPt/QYQ6DHNUrOHFIB+RCSCCXrmHP3/rocPxjEmH9IV45 3xyl2N13As7jWamoRxkV10P80MShh5PBvYEqcYmc47EZVXjkx5hP0BNiBktBk55qPnSMCbpa ipUpMW19iTwrY05NAbxVGDvg+7IK2R/rgHBvL8srMjJ57pR592V/0h3VQhm0ZUFuZ1s07ppe uh0CrGAi/yS5BZdAn/dQEtuU6HD3BvWFilJWtOPK3JXelrvS4N9aljbS9iP4RdnB/E2+WwJy 4lse7GVJ9mxLwUI+DS61WkvwhVt9tj8/5/DzN/nI0sq3DNSkKC50eEE8IM5n5hnu47QcE2Dx 9jZtCQT4wzLntymv0chEY26pTYnjeWdIPv7YcoyjuPHlL7FAW/IYRejSYM1GpmEuNi4gS17U G0YAZkvjncljeRd6UzGW+Jnep5B4tIYYzmbPnOnA1KhnhRlT5lICc7qvCK+d6cSRqwZDheb6 YDf6miyYDFqUjGg0jAdZI5/RmaYxSWypa/tHB3ivQnKwKx5T2ud7ORnFESvtSaEgTMt9+YYV zXoQcRaCWWvnbFSFeI+4jbgjosLpUEFU7a8H1dVgrrHVj8K1pxfCw5MEGAECACYCGwwWIQSj 0ZLORO9BJRe87WRqc5sCXGuY1AUCXZzb6QUJCXvBlAAhCRBqc5sCXGuY1BYhBKPRks5E70El F7ztZGpzmwJca5jUndgf/jhpj+1OdILlvcwU4h/sPIoru5nLRFdLvi4qfj/X2/pE7IcZ5UVm p4B8Cpln7ONN8Mhwkd1I9hRxdq07T9zk/KD0FDXh2vQ/NDmdLUwHZuvSsQnKOi0hFEHHmkXU Gg0f0uaE1iXyPgsNT8juWg3LYeHDGNHmd4IyCozOX3n6+6nKkRZWonrxt3AOVVWU6j/NfhE7 VYI+EXZwpORgsWpdaTXRJZF4Uo8PAa97uAlYriA1MzgTb63QHT2074n3EcCjG4HRFu+MKfz+ KL7Ln+XTjmYf4qPIvUyLFpckBK7709C9R9/4EhUse00PUvovdTGV1y2FI1/O63m5PSSr1bAB /X/+gSfLJPatgHn8ek0AdXZi0nNEETWnITAqs0Xv4AjhZ0D1sL9kurQmOCgeoX50QHME34gM VJ+DtMS+fb9u615LcaZJ81K09bm9o6CBNQvTuJ8KNBAyNh6tsx2RvHt9VW6/eeiqtPAjfdOQ 4x6JWqdHZaJk8ptU3WszFksnZkMVuDdE5T8ktjVo4vFT0A/G2oFRIo0nyUGUTOwW8bPSxXC1 DWQ4q+pJTod/s74v4jvxmq/kstuIThsqbOloHaDzWeGNnSVr9Qk7nlwZmF7X/QmtVDUeFFQf QOFm9KgEVoG/KD0c9vo83HROTsmNyXvCyZFSz120WCrPxWJMHk7CZdnaoytcNqXEAvVLymWf fUzNGIam2EymnwYw2t3h05tL7ojtnQWUEFgjzqoiyVVLlzaPpAnx8AXkz6jKDbDnmZ3FLYNt 6BtxjNLkO1lkOEwohqok+rfUeRp9pNo8p7ipBw3WE4vDu/65LQQHJ/CfQGlH9V6g2DGIaACD WpRGKzYZpvpGBhGYcTngLO1sshD9hhF8m/lEUd1TcmLnEJ0hl4+88zeCyREINYt0RcIME8au v32RTwPDQ+r7LB56mKDXL3ijZlUHXIAKkc+1XsCbJTXDB5oYi86xrCl6Z8TfKP5kR3R8IEG0 DHimFW86BtuFMnBIYa342y2zjAwYiKHh/KE4EdgtDXviGMFygUrfPxOyVo1mWA5WveCsw1U3 BnYZ/lIyAQwDUyuZ6QWx2Sqos3CmTxB4DhczBAGDyVKyKx1C7UO9t8PkI4E+nw176gYidOGG EKit9OEborPdR8HrP4f8CTgPCUI0uIQTYswHH9HhSq8d1maM+4SmsvoQT+s4lt8kvJp9ce6B uWrtpKE+BrlhmZrZleospHp05F+oHuE7lrOg09g0SFdTigqSJNbN1R/pkPI5Q03GfbWipsd4 iY0Rj0D34DQVeKAa4qUlOcBgX2D9VHRap9GKQRWs//egCueqDZNmIk3071aFV+BSiBSTZIIG t/YZOE37yKSj2rcCbqg= Message-ID: Date: Wed, 6 May 2020 17:06:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <27882183.aulKxNbigu@magrathea> Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="qqNpKEXwhUd9USb6uE330iYEzCKLxcXHy" Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --qqNpKEXwhUd9USb6uE330iYEzCKLxcXHy Content-Type: multipart/mixed; boundary="jSElaRyXFvf7LOc5ZE8eEBg5K1W1moogp"; protected-headers="v1" From: Stefan Metzmacher To: Andreas Schneider , Anoop C S , Jeremy Allison , samba-technical@lists.samba.org Cc: Jens Axboe , io-uring , Pavel Begunkov Message-ID: Subject: Re: Data Corruption bug with Samba's vfs_iouring and Linux 5.6.7/5.7rc3 References: <0009f6b7-9139-35c7-c0b1-b29df2a67f70@samba.org> <62e94d8a6cecf60cfba7e5ca083e90bc8f216d61.camel@cryptolab.net> <36fd1c62-abfb-931c-ac31-f6afbbb313fb@samba.org> <27882183.aulKxNbigu@magrathea> In-Reply-To: <27882183.aulKxNbigu@magrathea> --jSElaRyXFvf7LOc5ZE8eEBg5K1W1moogp Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Am 06.05.20 um 16:46 schrieb Andreas Schneider via samba-technical: > On Wednesday, 6 May 2020 16:08:03 CEST Stefan Metzmacher via samba-tech= nical=20 > wrote: >> Am 06.05.20 um 14:41 schrieb Anoop C S: >>> On Wed, 2020-05-06 at 12:33 +0200, Stefan Metzmacher wrote: >>>> Hi Anoop, >>>> >>>>> I could reproduce the difference in SHA256 checksum after copying a= >>>>> directory with 100 copies of test file(provided by reporter) from >>>>> io_uring VFS module enabled share using Windows explorer(right- >>>>> click- >>>>> >>>>>> copy/paste). Only 5 out of 100 files had correct checksum after >>>>>> copy >>>>> >>>>> operation :-/ >>>> >>>> Great! Can you please try to collect level 1 log files with >>>> the patch https://bugzilla.samba.org/attachment.cgi?id=3D15955 >>>> applied? >>> >>> I have attached three log files. >>> log.io_uring.smbd -- Copy using Windows explorer >>> log.io_uring-mget.smd -- Copy using smbclient >>> log.io_uring-powershell.smd -- Copy using `Copy-Item` >> >> Thanks! All of them show short reads like: >>> [2020/05/06 17:27:28.130248, 1] >>> ../../source3/modules/vfs_io_uring.c:103(vfs_io_uring_finish_req)>=20 >>> vfs_io_uring_finish_req: pread ofs=3D0 (0x0) len=3D32768 (0x8000) >>> nread=3D32768 (0x32768) eof=3D10000000 (0x989680) blks=3D4096 block= s=3D19536 >>> dir/1.bin fnum 1607026405>=20 >>> [2020/05/06 17:27:28.131049, 1] >>> ../../source3/modules/vfs_io_uring.c:103(vfs_io_uring_finish_req)>=20 >>> vfs_io_uring_finish_req: pread ofs=3D9969664 (0x982000) len=3D30336= (0x7680) >>> nread=3D30336 (0x30336) eof=3D10000000 (0x989680) blks=3D4096 block= s=3D19536 >>> dir/1.bin fnum 1607026405>=20 >>> [2020/05/06 17:27:28.133679, 1] >>> ../../source3/modules/vfs_io_uring.c:103(vfs_io_uring_finish_req)>=20 >>> vfs_io_uring_finish_req: pread ofs=3D61440 (0xf000) len=3D32768 (0x= 8000) >>> nread=3D32768 (0x32768) eof=3D10000000 (0x989680) blks=3D4096 block= s=3D19536 >>> dir/1.bin fnum 1607026405>=20 >>> [2020/05/06 17:27:28.140184, 0] >>> ../../source3/modules/vfs_io_uring.c:88(vfs_io_uring_finish_req)>=20 >>> vfs_io_uring_finish_req: Invalid pread ofs=3D0 (0x0) len=3D1048576 >>> (0x100000) nread=3D32768 (0x32768) eof=3D10000000 (0x989680) blks=3D= 4096 >>> blocks=3D19536 dir/1.bin fnum 1607026405 >> It seems the first request is at ofs=3D0 len=3D32768 (0x8000) and we g= et >> 32768 back. >> A follow up request with ofs=3D0 len=3D1048576 (0x100000) only gets th= e >> first 32768 bytes which are already in the page cache. >> >> I can easily reproduce this with the Ubuntu 5.4 kernel once I add >> state->ur.sqe.rw_flags |=3D RWF_NOWAIT; to vfs_io_uring_pread_send() >> and use this. >> >> echo 1 > /proc/sys/vm/drop_caches >> head -c 1024 /root/samba-test/ff1.dat | hexdump -C >> 00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >> >> |................| >> >> * >> 00000400 >> smbclient //172.31.9.167/uringff -Uroot%test -c "get ff1.dat" >> >> results in this log entries: >>> [2020/05/06 06:51:57.069990, 0] >>> ../../source3/modules/vfs_io_uring.c:89(vfs_io_uring_finish_req)>=20 >>> vfs_io_uring_finish_req: Invalid pread ofs=3D0 (0x0) len=3D8388608 >>> (0x800000) nread=3D16384 (0x4000) eof=3D8388608 (0x800000) blks=3D4= 096 >>> blocks=3D16384 ff1.dat fnum 840153065>=20 >>> [2020/05/06 06:51:57.076882, 1] >>> ../../source3/modules/vfs_io_uring.c:104(vfs_io_uring_finish_req)>=20 >>> vfs_io_uring_finish_req: pread ofs=3D16384 (0x4000) len=3D8372224 (= 0x7fc000) >>> nread=3D8372224 (0x7fc000) eof=3D8388608 (0x800000) blks=3D4096 blo= cks=3D16384 >>> ff1.dat fnum 840153065 >> smbclient is just smart enough to recover itself from the short read. >> But the windows client isn't. >> >> The attached test against liburing (git://git.kernel.dk/liburing) shou= ld >> be able to demonstrate the problem. It can also be found in >> https://github.com/metze-samba/liburing/tree/implicit-rwf-nowaithttps:= //gith >> ub.com/metze-samba/liburing/commit/eb06dcfde747e46bd08bedf9def2e6cb536= c39e3 >> >> >> I added the sqe->rw_flags =3D RWF_NOWAIT; line in order to demonstrate= it >> against the Ubuntu 5.3 and 5.4 kernels. They both seem to have the bug= =2E >> >> Can someone run the unmodified test/implicit-rwf_nowait against >> a newer kernel? >=20 > $ uname -a > Linux magrathea 5.6.8-1-default #1 SMP Thu Apr 30 10:47:01 UTC 2020 (63= 116ab)=20 > x86_64 x86_64 x86_64 GNU/Linux > $ ./a.out=20 > cqe res=3D4096 !=3D 8192 Thanks for confirming, it passes fine on 5.3 and 5.4 kernels. metze --jSElaRyXFvf7LOc5ZE8eEBg5K1W1moogp-- --qqNpKEXwhUd9USb6uE330iYEzCKLxcXHy Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEfFbGo3YXpfgryIw9DbX1YShpvVYFAl6y0oQACgkQDbX1YShp vVZBbxAAhfQJi8OiGKp6RJIpecgNwShrktluwlyzt1lDApQgznYOGYYfvsebQv9H GC+xOY+GJ65ao3joSXW3lHSzeSTTLWzPx7mH4LsVjKlDtfnJ5jnKfn+IODJl0bEz h1L5s2Xy263UBkrE5863yGZYCSp27OsyO4ETj/rzYVWJ24VNiJOJjmvY3rQuZ92e ekeeIJJRL3Jiw2SeuY9iTsNloVLLygAAfjZ7Dpo08ENGpHrwC5S9tEDM9PyZoZie pGo/gMUNojhUmqAfrzR1lU3UUMNrY8gbgt3pQSIT+eUjkkhaYppTpksvqSNs9x/M GwhDMy10WTciH9OerR7gii42Rp9W0h/HcqBG8B9dV84scEyLKSO+Kio5GmQUQlYV 57VWj+oHgwXpAzIitVEvV2IxhwppPmeyGdyHOoA+OObQd+p4PmJ1alEYb/MoN9nQ OQSNNmtTpWQ8mXBGbQQ4SGc7xwMiM3hl02jtSmvVCvPoNT4+v641rVimmuEbyR9L lvXB2i7Ex3NzSySCv02GZQ1ftn2/H0c9b/VlH1gMQcTwQh7zQRhvB8QcPpiQWjWV ycFqHhssYmBrB0r7v4V4MRMC4NVg/boT4u0cQib/hnDATwkI37ySgkZ2N7GFPrGb qeas+8gAgy3e3Pg2WHWxcaB+kvZ3vfW+b6m3rSHgU4VNsSJLIVw= =OY+C -----END PGP SIGNATURE----- --qqNpKEXwhUd9USb6uE330iYEzCKLxcXHy--