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[209.85.220.73]) by mx.google.com with SMTPS id b2sor3704945otp.66.2019.05.06.09.31.47 for (Google Transport Security); Mon, 06 May 2019 09:31:47 -0700 (PDT) Received-SPF: pass (google.com: domain of 3c2hqxaokcgqcpftgampxniqqing.eqonkpwz-oomxcem.qti@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=hn4rH9KT; spf=pass (google.com: domain of 3c2hqxaokcgqcpftgampxniqqing.eqonkpwz-oomxcem.qti@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3c2HQXAoKCGQCPFTGaMPXNIQQING.EQONKPWZ-OOMXCEM.QTI@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=BvoYtYVsULamnYvbwO19c3h5oHA1gsMsAv5tZYbLYtI=; b=hn4rH9KTek8R37jjBWMcf/SnTi9wO6imyjbK43Qo3YFFy0w0QB9ppRC7K8TE7v3vlN nPLbzWoXhcOl9RZZTW0CT+GOCLOJRZHlTgH0IFE90/0mo3gA6Benvmv0xM9qlEM2L7iM a5/5EdryhXK5o1zmP38+JskPbuvRNi2KBDqgGoYwdgZckW/t0t3zXYlgA28tCgQWx38p zeMjQt/2TKtd8YWaOZqpDqkiV1tfPRGdf11R4Vmzgti01WpJ/ug4M22kRPfo4KNLvnrQ G8KQ2Dx3TZLoioP3vZYIMjrpzIYzmaefwwMqniR4qNzu+AscTWd9F/aHBCgCKh66bnIf LcNw== X-Google-Smtp-Source: APXvYqy3zk1gAf1HD3ERPdP+fu/IbJWPYjnwXEpH7KM/4Kolrw9tSDmooPMwqXT4nvIVhZWlBkow5/TqTCzeTPOv X-Received: by 2002:a9d:6008:: with SMTP id h8mr18251374otj.55.1557160307352; Mon, 06 May 2019 09:31:47 -0700 (PDT) Date: Mon, 6 May 2019 18:30:59 +0200 In-Reply-To: Message-Id: <66d044ab9445dcf36a96205a109458ac23f38b73.1557160186.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 13/17] 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 , Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Robin Murphy , Luc Van Oostenryck , Dave Martin , 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 062a86c04123..36e7b52577d0 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -708,6 +708,8 @@ 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; @@ -790,6 +792,8 @@ 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; -- 2.21.0.1020.gf2820cf01a-goog