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[209.85.220.73]) by mx.google.com with SMTPS id w14sor1718257qvf.57.2019.06.03.09.56.03 for (Google Transport Security); Mon, 03 Jun 2019 09:56:03 -0700 (PDT) Received-SPF: pass (google.com: domain of 3i1h1xaokcigmzp3qawz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) client-ip=209.85.220.73; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=TJVcn1cL; spf=pass (google.com: domain of 3i1h1xaokcigmzp3qawz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3I1H1XAoKCIgmzp3qAwz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=EspxEupGJGiWEDXD9P4jjgWKmcXH74NzvYIbJ/AWgMI=; b=TJVcn1cLKwrCDqfOoDXp30a4H6TaXBKiwiHjDAdwongHK/bKzo02AftS+NOLHZV2qk uaXFTsh7OP9kK6tBgKChXJ2KBusgSI13ByE5QAJT4opcCyHzVAEN7KnoiqvVvgIk9UeZ thbX5DYw+Ya/O9Bt8a5AL4KNqAUsZ4B4hEfnsQKdt+gJFBe02e/Gllpw40I3Eh8jjzXh yX2E6mPgl8q0tFyhEApdfs/i0GKdcLnrmq2mOZHSQm727N+W9pKIuuH8ohRLmjbmQDTf QCPeVpMCsS5AlW/faffrLj+KIOBAFryuyM2XhBVLl0qrMu2w3WMArdINiV+/WP+bh/um j3qg== X-Google-Smtp-Source: APXvYqyTJQX58jIU+0IdRLMyhel9C9SXAf29MqpC57OIYMzhYLqjfoH2DhcsbA5oBHVd1rJqiIiEUBwjKZJxchdB X-Received: by 2002:a0c:be87:: with SMTP id n7mr3853859qvi.65.1559580963191; Mon, 03 Jun 2019 09:56:03 -0700 (PDT) Date: Mon, 3 Jun 2019 18:55:14 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.22.0.rc1.311.g5d7573a151-goog Subject: [PATCH v16 12/16] IB, arm64: untag user pointers in ib_uverbs_(re)reg_mr() From: Andrey Konovalov To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Catalin Marinas , Vincenzo Frascino , Will Deacon , Mark Rutland , Andrew Morton , Greg Kroah-Hartman , Kees Cook , Yishai Hadas , Felix Kuehling , Alexander Deucher , Christian Koenig , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , Leon Romanovsky , Luc Van Oostenryck , Dave Martin , Khalid Aziz , enh , Jason Gunthorpe , Christoph Hellwig , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. ib_uverbs_(re)reg_mr() use provided user pointers for vma lookups (through e.g. mlx4_get_umem_mr()), which can only by done with untagged pointers. Untag user pointers in these functions. Signed-off-by: Andrey Konovalov --- drivers/infiniband/core/uverbs_cmd.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 5a3a1780ceea..f88ee733e617 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -709,6 +709,8 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)) return -EINVAL; @@ -791,6 +793,8 @@ static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) if (ret) return ret; + cmd.start = untagged_addr(cmd.start); + if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags) return -EINVAL; -- 2.22.0.rc1.311.g5d7573a151-goog