From patchwork Fri Feb 21 16:01:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 11396789 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 528921395 for ; Fri, 21 Feb 2020 16:01:36 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2FD8A2067D for ; Fri, 21 Feb 2020 16:01:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qy6555g2"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="zRPNlg7Z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2FD8A2067D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Subject:To:From :Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=r0Z1UnLf4ep84pO3wgEkWdUKOsAzMM2lSNoEW2cvoVo=; b=qy6555g2QKd7YL ypa2R5nFknjCNHWsvRkYBA9sJcurY7HLN3H9BLC3htoXqdo6q9EM3af1WDegnA3EZJkm4Sz9o/fjs zg+HFrOBTzYwwWQS0rU1wArExQG6o+KJ8seZjeC0OpF1e0M60EySN63q03cXls9gNkGsxd0NlRLeG k/8j25bmcF60DFVmLBH/OhlWOTBu5W2d/zYFsfAJZWplEgWVMuUloJ/rTpFuee/337Kk6oNAclPFz JcyueH8XQMAHxxFzmBA9TnCMGS4du2A6rxA1+MixWsurrXXivQbZSz/tgiicBK6IQQYquSjX71+r3 YE/zNMM16aqzLQwqiAUA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j5AkB-0000LL-Hi; Fri, 21 Feb 2020 16:01:35 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j5Ak7-0000JD-5V for linux-arm-kernel@lists.infradead.org; Fri, 21 Feb 2020 16:01:32 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DFB522067D; Fri, 21 Feb 2020 16:01:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582300890; bh=BEciPzHo8CuryHbvE/f20uJHph4MuYVHw/4AtR5NS6Y=; h=Date:From:To:Cc:Subject:From; b=zRPNlg7ZZCCwC9ptj3GpudDZKoPg1f9V2n2HZeKl9vgYeepePq5DIXqB73FhrYWwN YiF/OSuRz9WVxGVhbrToyAkJm3HpDI3KrayiuJ0U/dPL7O/NWcME7JlAjmS/OybVXw 1u3gsYqp4h8gZC+LJxp6AYEvrxmsyjJKubdcZhs4= Date: Fri, 21 Feb 2020 16:01:26 +0000 From: Will Deacon To: torvalds@linux-foundation.org Subject: [GIT PULL] arm64 fixes for -rc3 Message-ID: <20200221160126.GB19330@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200221_080131_230431_7A429801 X-CRM114-Status: GOOD ( 15.86 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: catalin.marinas@arm.com, kernel-team@android.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Hi Linus, Please pull these arm64 fixes for -rc3. It's all straightforward apart from the changes to mmap()/mremap() in relation to their handling of address arguments from userspace with non-zero tag bits in the upper byte. The change to brk() is necessary to fix a nasty user-visible regression in malloc(), but we tightened up mmap() and mremap() at the same time because they also allow the user to create virtual aliases by accident. It's much less likely than brk() to matter in practice, but enforcing the principle of "don't permit the creation of mappings using tagged addresses" leads to a straightforward ABI without having to worry about the "but what if a crazy program did foo?" aspect of things. That said, this is core code and I know you'd prefer to limit the change to brk(), so the patch is sitting on top of the branch in case you prefer not to include it. If you decide to tweak it manually, please can you update the docs at the same time? Cheers, Will --->8 The following changes since commit d91771848f0ae2eec250a9345926a1a3558fa943: arm64: time: Replace by (2020-02-12 17:26:38 +0000) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git tags/arm64-fixes for you to fetch changes up to dcde237319e626d1ec3c9d8b7613032f0fd4663a: mm: Avoid creating virtual address aliases in brk()/mmap()/mremap() (2020-02-20 10:03:14 +0000) ---------------------------------------------------------------- arm64 fixes for -rc3 - Fix regression in malloc() caused by ignored address tags in brk() - Add missing brackets around argument to untagged_addr() macro - Fix clang build when using binutils assembler - Fix silly typo in virtual memory map documentation ---------------------------------------------------------------- Catalin Marinas (1): mm: Avoid creating virtual address aliases in brk()/mmap()/mremap() Scott Branden (1): docs: arm64: fix trivial spelling enought to enough in memory.rst Vincenzo Frascino (1): arm64: lse: Fix LSE atomics with LLVM Will Deacon (1): arm64: memory: Add missing brackets to untagged_addr() macro Documentation/arm64/memory.rst | 2 +- Documentation/arm64/tagged-address-abi.rst | 11 +++++++++-- arch/arm64/include/asm/lse.h | 2 +- arch/arm64/include/asm/memory.h | 2 +- mm/mmap.c | 4 ---- mm/mremap.c | 1 - 6 files changed, 12 insertions(+), 10 deletions(-)