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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4CB91C433EF for ; Sat, 23 Jul 2022 01:02:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231478AbiGWBCj (ORCPT ); Fri, 22 Jul 2022 21:02:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43192 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229572AbiGWBCi (ORCPT ); Fri, 22 Jul 2022 21:02:38 -0400 Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7793D13E18; Fri, 22 Jul 2022 18:02:37 -0700 (PDT) Received: by mail-ed1-x536.google.com with SMTP id c12so217137ede.3; Fri, 22 Jul 2022 18:02:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jlyu+Ezdns1o/Dl+mNDx1dSSzCArmmCHe5zOulHCgYY=; b=PZsBl5ooCfsAyfBssviyiVR5Tq1jj7pKvSq+8EIYiuLRuANId3eEJ8Cfne0oRH5tST cNckwvwkYNCJil7c4bHdQwdq+1j/ZICMbKPDmupGpGkjuYuypwIlqr25b/2zb8nGj+L7 8X6BT7i0cfdvLYah+oB/+uw18/v7O2tlssjrHraunx39DcQd6oIsFM91LN1KRUjOeySk 107g886IDOhDMfSuVZ8M22SN2x2lCSM95MlNgPfYmjNiwur+gHG+g9710+/nPbgwn0jJ VB2nk9BZ+suPliZX/YIqKiK3alTptYuhcFjUg7RbgvcF8nWJZFV9um7H8k3hL7Y+Q5TY PsjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jlyu+Ezdns1o/Dl+mNDx1dSSzCArmmCHe5zOulHCgYY=; b=f7YRrftJNREBJlYrmrtZIE7CNplfquASOus+izDvxXFHwmFsTmEzz0fG3wdNAkCK03 LKUCZpwEEbQ4VIFGp22EMkOvzC+Opjp4gskkWXEf9ZqlzWRs4OrQNwKMg0qwRAky2Wfa OKZxuBmjtvfijbmM3YeBHyGKJHn740vJyOgpQUQsJaQK4bgYoZzPHBvc+/vTZcSOEkTe gvKrOGc17J4UzzEUsh5y/pDCiuZulKtuda2IgoYZT/mg2TIApSeA38yO1ebxK1fagh7d whTwxAVxSa8YbnoCYqkYX6bZoeapaH2dxqqbdo+5/m0VPNw3C4c6wHsimS92M/9suPrS CHCA== X-Gm-Message-State: AJIora+SkjvqIVttqYrJPHpcqZ0i4xNMXu/EGGQrCNqBCQJaIwJCpSCs aFlYsyn+m8UnzE28ZeDpDNQ= X-Google-Smtp-Source: AGRyM1sAMP8KHkAWh5bS378ppL8TdO4StC0sEC6TB/Rq2m5BGNgizfRRhPByQs8fPv0/46kAMhGelA== X-Received: by 2002:a05:6402:524d:b0:43a:72fe:76b7 with SMTP id t13-20020a056402524d00b0043a72fe76b7mr2211131edd.398.1658538155443; Fri, 22 Jul 2022 18:02:35 -0700 (PDT) Received: from opensuse.localnet (host-79-56-6-250.retail.telecomitalia.it. [79.56.6.250]) by smtp.gmail.com with ESMTPSA id r10-20020a1709061baa00b0071cef8bafc3sm2549153ejg.1.2022.07.22.18.02.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Jul 2022 18:02:34 -0700 (PDT) From: "Fabio M. De Francesco" To: Ira Weiny Cc: Benjamin LaHaise , Alexander Viro , Eric Biederman , Kees Cook , Dan Williams , Matthew Wilcox , Jan Kara , Jeff Layton , Chuck Lever , Jens Axboe , Pavel Begunkov , Thomas Gleixner , Paul Walmsley , Palmer Dabbelt , Albert Ou , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nvdimm@lists.linux.dev, io-uring@vger.kernel.org, linux-riscv@lists.infradead.org, llvm@lists.linux.dev Subject: Re: [PATCH] fs: Call kmap_local_page() in copy_string_kernel() Date: Sat, 23 Jul 2022 03:02:32 +0200 Message-ID: <2115146.irdbgypaU6@opensuse> In-Reply-To: References: <20220710100136.25496-1-fmdefrancesco@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On venerd=C3=AC 22 luglio 2022 02:14:20 CEST Ira Weiny wrote: > On Sun, Jul 10, 2022 at 12:01:36PM +0200, Fabio M. De Francesco wrote: > > The use of kmap_atomic() is being deprecated in favor of=20 kmap_local_page(). > >=20 > > With kmap_local_page(), the mappings are per thread, CPU local, not > > globally visible and can take page faults. Furthermore, the mappings=20 can be > > acquired from any context (including interrupts). > >=20 > > Therefore, use kmap_local_page() in copy_string_kernel() instead of > > kmap_atomic(). > >=20 > > Tested with xfstests on a QEMU + KVM 32-bits VM booting a kernel with > > HIGHMEM64GB enabled. > >=20 > > Suggested-by: Ira Weiny > > Signed-off-by: Fabio M. De Francesco > > --- > >=20 > > I sent a first patch to fs/exec.c for converting kmap() and=20 kmap_atomic() > > to kmap_local_page(): > > https://lore.kernel.org/lkml/20220630163527.9776-1-fmdefrancesco@gmail.= com/ > >=20 > > Some days ago, Ira Weiny, while he was reviewing that patch, made me=20 notice > > that I had overlooked a second kmap_atomic() in the same file (thanks): > > https://lore.kernel.org/lkml/YsiQptk19txHrG4c@iweiny-desk3/ > >=20 > > I've been asked to send this as an additional change. This is why there= =20 will > > not be any second version of that previous patch. > >=20 > > fs/exec.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > >=20 > > diff --git a/fs/exec.c b/fs/exec.c > > index 4a2129c0d422..5fa652ca5823 100644 > > --- a/fs/exec.c > > +++ b/fs/exec.c > > @@ -639,11 +639,11 @@ int copy_string_kernel(const char *arg, struct=20 linux_binprm *bprm) > > page =3D get_arg_page(bprm, pos, 1); > > if (!page) > > return -E2BIG; > > - kaddr =3D kmap_atomic(page); > > + kaddr =3D kmap_local_page(page); > > flush_arg_page(bprm, pos & PAGE_MASK, page); >=20 > I really question why we can't use memcpy_to_page() here and move the > flush_arg_page() prior to the mapping? >=20 > flush_arg_page() only calls flush_cache_page() which does not need the > mapping to work correctly AFAICT. You're right here. I'm sorry for being so lazy and not checking that=20 flush_arg_page() does not need to be called while the task holds the local= =20 mapping :-( In v2 I'll move flush_arg_page() one line above memcpy_to_page(). Thanks for your comment, =46abio >=20 > Ira >=20 > > memcpy(kaddr + offset_in_page(pos), arg,=20 bytes_to_copy); > > flush_dcache_page(page); > > - kunmap_atomic(kaddr); > > + kunmap_local(kaddr); > > put_arg_page(page); > > } > > =20 > > --=20 > > 2.36.1 > >=20 >=20 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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 24FD1C433EF for ; Sat, 23 Jul 2022 01:02:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=jkII5tKaM3zjUqFvmL97GcyQATFGEWsiyWbYg5EM56M=; b=jaL4AvqA4Du5Oq pXtuhLijkTZyeoAra+2U5Xbv0CV+0nffys0DgRT1MgGD/P5KWOoVJapGhjv6Nd+CQTEx863FjeahL M5dKVhvt4tp1A/CgUg44AruR3Q1lqCZP0fTdRFpaybTfLgaqZuEjhPG2DJw+15ZjVEnVuM9TmAfNH TLxIT6jrB6FFClSIGywpwFIWlV6KZ8hr6W2Ssn7KFPGuzJ5E6laeAGvKtrNZN/P3qb5yaCz5mnlVY n8gnEhzsXXsEinhkHKZCw6mXX/OcojgGmiW23fWXg3B5RVCD/+2qblbNGMjv9gmvM9KrAK0wS5tyI B/jjS5SrgA25dwyPOi8A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oF3XX-00DxEg-A1; Sat, 23 Jul 2022 01:02:43 +0000 Received: from mail-ed1-x530.google.com ([2a00:1450:4864:20::530]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oF3XT-00DxBa-FF for linux-riscv@lists.infradead.org; Sat, 23 Jul 2022 01:02:41 +0000 Received: by mail-ed1-x530.google.com with SMTP id v12so7571325edc.10 for ; Fri, 22 Jul 2022 18:02:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jlyu+Ezdns1o/Dl+mNDx1dSSzCArmmCHe5zOulHCgYY=; b=PZsBl5ooCfsAyfBssviyiVR5Tq1jj7pKvSq+8EIYiuLRuANId3eEJ8Cfne0oRH5tST cNckwvwkYNCJil7c4bHdQwdq+1j/ZICMbKPDmupGpGkjuYuypwIlqr25b/2zb8nGj+L7 8X6BT7i0cfdvLYah+oB/+uw18/v7O2tlssjrHraunx39DcQd6oIsFM91LN1KRUjOeySk 107g886IDOhDMfSuVZ8M22SN2x2lCSM95MlNgPfYmjNiwur+gHG+g9710+/nPbgwn0jJ VB2nk9BZ+suPliZX/YIqKiK3alTptYuhcFjUg7RbgvcF8nWJZFV9um7H8k3hL7Y+Q5TY PsjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jlyu+Ezdns1o/Dl+mNDx1dSSzCArmmCHe5zOulHCgYY=; b=PYx4OiGYG7w42IvV0h5+5xXK43zUJ8prU6tl1ZJ/oSX5y9QlbN55AODTI/JrEFst08 93vE32wqJcXpdp6YzJ1p5kHPymdc1MzskyRyPET8EWqeBiEE/xKCtvRcRFEE9GbrxsJJ oI1UnjAaQ2ZhA01a4WH33afsW94jg3WjJKzLxfKRSPiP5hd/uEUilRL2+lVchaennE88 Sd0WdwR4ha+dGTZ60S+SzmJoJVNFGC9lkurbz9AgsrExDTIJMIgQCcYhL7q56EovJQp3 LOBl1chSqzHZ+hiFk2HLLmmPnJ+ruuPVcGkzWCdF6I1R0rZLM7Lc5+EmvYy9gtheCMCg WXew== X-Gm-Message-State: AJIora8p4X/n+SoP/dfMnSrPIQ7p8SRbIXWmK8HYeyJvnIb17aTUPajZ 7gnAso3+sRo+tFEllVI15+LTYtFX1SNyaA== X-Google-Smtp-Source: AGRyM1sAMP8KHkAWh5bS378ppL8TdO4StC0sEC6TB/Rq2m5BGNgizfRRhPByQs8fPv0/46kAMhGelA== X-Received: by 2002:a05:6402:524d:b0:43a:72fe:76b7 with SMTP id t13-20020a056402524d00b0043a72fe76b7mr2211131edd.398.1658538155443; Fri, 22 Jul 2022 18:02:35 -0700 (PDT) Received: from opensuse.localnet (host-79-56-6-250.retail.telecomitalia.it. [79.56.6.250]) by smtp.gmail.com with ESMTPSA id r10-20020a1709061baa00b0071cef8bafc3sm2549153ejg.1.2022.07.22.18.02.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Jul 2022 18:02:34 -0700 (PDT) From: "Fabio M. De Francesco" To: Ira Weiny Cc: Benjamin LaHaise , Alexander Viro , Eric Biederman , Kees Cook , Dan Williams , Matthew Wilcox , Jan Kara , Jeff Layton , Chuck Lever , Jens Axboe , Pavel Begunkov , Thomas Gleixner , Paul Walmsley , Palmer Dabbelt , Albert Ou , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nvdimm@lists.linux.dev, io-uring@vger.kernel.org, linux-riscv@lists.infradead.org, llvm@lists.linux.dev Subject: Re: [PATCH] fs: Call kmap_local_page() in copy_string_kernel() Date: Sat, 23 Jul 2022 03:02:32 +0200 Message-ID: <2115146.irdbgypaU6@opensuse> In-Reply-To: References: <20220710100136.25496-1-fmdefrancesco@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220722_180239_573084_F94C567E X-CRM114-Status: GOOD ( 26.44 ) X-BeenThere: linux-riscv@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="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gdmVuZXJkw6wgMjIgbHVnbGlvIDIwMjIgMDI6MTQ6MjAgQ0VTVCBJcmEgV2Vpbnkgd3JvdGU6 Cj4gT24gU3VuLCBKdWwgMTAsIDIwMjIgYXQgMTI6MDE6MzZQTSArMDIwMCwgRmFiaW8gTS4gRGUg RnJhbmNlc2NvIHdyb3RlOgo+ID4gVGhlIHVzZSBvZiBrbWFwX2F0b21pYygpIGlzIGJlaW5nIGRl cHJlY2F0ZWQgaW4gZmF2b3Igb2YgCmttYXBfbG9jYWxfcGFnZSgpLgo+ID4gCj4gPiBXaXRoIGtt YXBfbG9jYWxfcGFnZSgpLCB0aGUgbWFwcGluZ3MgYXJlIHBlciB0aHJlYWQsIENQVSBsb2NhbCwg bm90Cj4gPiBnbG9iYWxseSB2aXNpYmxlIGFuZCBjYW4gdGFrZSBwYWdlIGZhdWx0cy4gRnVydGhl cm1vcmUsIHRoZSBtYXBwaW5ncyAKY2FuIGJlCj4gPiBhY3F1aXJlZCBmcm9tIGFueSBjb250ZXh0 IChpbmNsdWRpbmcgaW50ZXJydXB0cykuCj4gPiAKPiA+IFRoZXJlZm9yZSwgdXNlIGttYXBfbG9j YWxfcGFnZSgpIGluIGNvcHlfc3RyaW5nX2tlcm5lbCgpIGluc3RlYWQgb2YKPiA+IGttYXBfYXRv bWljKCkuCj4gPiAKPiA+IFRlc3RlZCB3aXRoIHhmc3Rlc3RzIG9uIGEgUUVNVSArIEtWTSAzMi1i aXRzIFZNIGJvb3RpbmcgYSBrZXJuZWwgd2l0aAo+ID4gSElHSE1FTTY0R0IgZW5hYmxlZC4KPiA+ IAo+ID4gU3VnZ2VzdGVkLWJ5OiBJcmEgV2VpbnkgPGlyYS53ZWlueUBpbnRlbC5jb20+Cj4gPiBT aWduZWQtb2ZmLWJ5OiBGYWJpbyBNLiBEZSBGcmFuY2VzY28gPGZtZGVmcmFuY2VzY29AZ21haWwu Y29tPgo+ID4gLS0tCj4gPiAKPiA+IEkgc2VudCBhIGZpcnN0IHBhdGNoIHRvIGZzL2V4ZWMuYyBm b3IgY29udmVydGluZyBrbWFwKCkgYW5kIAprbWFwX2F0b21pYygpCj4gPiB0byBrbWFwX2xvY2Fs X3BhZ2UoKToKPiA+IGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL2xrbWwvMjAyMjA2MzAxNjM1Mjcu OTc3Ni0xLWZtZGVmcmFuY2VzY29AZ21haWwuY29tLwo+ID4gCj4gPiBTb21lIGRheXMgYWdvLCBJ cmEgV2VpbnksIHdoaWxlIGhlIHdhcyByZXZpZXdpbmcgdGhhdCBwYXRjaCwgbWFkZSBtZSAKbm90 aWNlCj4gPiB0aGF0IEkgaGFkIG92ZXJsb29rZWQgYSBzZWNvbmQga21hcF9hdG9taWMoKSBpbiB0 aGUgc2FtZSBmaWxlICh0aGFua3MpOgo+ID4gaHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvbGttbC9Z c2lRcHRrMTl0eEhyRzRjQGl3ZWlueS1kZXNrMy8KPiA+IAo+ID4gSSd2ZSBiZWVuIGFza2VkIHRv IHNlbmQgdGhpcyBhcyBhbiBhZGRpdGlvbmFsIGNoYW5nZS4gVGhpcyBpcyB3aHkgdGhlcmUgCndp bGwKPiA+IG5vdCBiZSBhbnkgc2Vjb25kIHZlcnNpb24gb2YgdGhhdCBwcmV2aW91cyBwYXRjaC4K PiA+IAo+ID4gIGZzL2V4ZWMuYyB8IDQgKystLQo+ID4gIDEgZmlsZSBjaGFuZ2VkLCAyIGluc2Vy dGlvbnMoKyksIDIgZGVsZXRpb25zKC0pCj4gPiAKPiA+IGRpZmYgLS1naXQgYS9mcy9leGVjLmMg Yi9mcy9leGVjLmMKPiA+IGluZGV4IDRhMjEyOWMwZDQyMi4uNWZhNjUyY2E1ODIzIDEwMDY0NAo+ ID4gLS0tIGEvZnMvZXhlYy5jCj4gPiArKysgYi9mcy9leGVjLmMKPiA+IEBAIC02MzksMTEgKzYz OSwxMSBAQCBpbnQgY29weV9zdHJpbmdfa2VybmVsKGNvbnN0IGNoYXIgKmFyZywgc3RydWN0IAps aW51eF9iaW5wcm0gKmJwcm0pCj4gPiAgCQlwYWdlID0gZ2V0X2FyZ19wYWdlKGJwcm0sIHBvcywg MSk7Cj4gPiAgCQlpZiAoIXBhZ2UpCj4gPiAgCQkJcmV0dXJuIC1FMkJJRzsKPiA+IC0JCWthZGRy ID0ga21hcF9hdG9taWMocGFnZSk7Cj4gPiArCQlrYWRkciA9IGttYXBfbG9jYWxfcGFnZShwYWdl KTsKPiA+ICAJCWZsdXNoX2FyZ19wYWdlKGJwcm0sIHBvcyAmIFBBR0VfTUFTSywgcGFnZSk7Cj4g Cj4gSSByZWFsbHkgcXVlc3Rpb24gd2h5IHdlIGNhbid0IHVzZSBtZW1jcHlfdG9fcGFnZSgpIGhl cmUgYW5kIG1vdmUgdGhlCj4gZmx1c2hfYXJnX3BhZ2UoKSBwcmlvciB0byB0aGUgbWFwcGluZz8K PiAKPiBmbHVzaF9hcmdfcGFnZSgpIG9ubHkgY2FsbHMgZmx1c2hfY2FjaGVfcGFnZSgpIHdoaWNo IGRvZXMgbm90IG5lZWQgdGhlCj4gbWFwcGluZyB0byB3b3JrIGNvcnJlY3RseSBBRkFJQ1QuCgpZ b3UncmUgcmlnaHQgaGVyZS4gSSdtIHNvcnJ5IGZvciBiZWluZyBzbyBsYXp5IGFuZCBub3QgY2hl Y2tpbmcgdGhhdCAKZmx1c2hfYXJnX3BhZ2UoKSBkb2VzIG5vdCBuZWVkIHRvIGJlIGNhbGxlZCB3 aGlsZSB0aGUgdGFzayBob2xkcyB0aGUgbG9jYWwgCm1hcHBpbmcgOi0oCgpJbiB2MiBJJ2xsIG1v dmUgZmx1c2hfYXJnX3BhZ2UoKSBvbmUgbGluZSBhYm92ZSBtZW1jcHlfdG9fcGFnZSgpLgoKVGhh bmtzIGZvciB5b3VyIGNvbW1lbnQsCgpGYWJpbwoKPiAKPiBJcmEKPiAKPiA+ICAJCW1lbWNweShr YWRkciArIG9mZnNldF9pbl9wYWdlKHBvcyksIGFyZywgCmJ5dGVzX3RvX2NvcHkpOwo+ID4gIAkJ Zmx1c2hfZGNhY2hlX3BhZ2UocGFnZSk7Cj4gPiAtCQlrdW5tYXBfYXRvbWljKGthZGRyKTsKPiA+ ICsJCWt1bm1hcF9sb2NhbChrYWRkcik7Cj4gPiAgCQlwdXRfYXJnX3BhZ2UocGFnZSk7Cj4gPiAg CX0KPiA+ICAKPiA+IC0tIAo+ID4gMi4zNi4xCj4gPiAKPiAKCgoKCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1yaXNjdiBtYWlsaW5nIGxpc3QK bGludXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9y Zy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==