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s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=BvoYtYVsULamnYvbwO19c3h5oHA1gsMsAv5tZYbLYtI=; b=NxbZDmcTiTDZePZaIQ+C3QWxRhVBjjdLS1nvB+SIu0naL0hS5syQzXh8DkYjI5G4+k Tr2TcHvsIgpcWjKCM7lcR0u6IrctQDRhZE4krmHfFTUEiKkRcW9W72a8OcZsHe6KIHGq 8nLl3pszlfi9neiTtgSkUiwBhwiP2YR+qkXQIJ9Pse7Aah/iPbmZ0zImecTi6AGzaKC4 KmdyxynQMR/4wECZzfVnWZRYoANGLZee095ykFAFlRtDlQFliJXQmxwtZ0O7bvgHYaiz Rf0a4ODKBDqvHJH8Q1UKPNIF3NDsGINnMLr7pMR2cwKJrM/so1egk8HdIgrxuVWIcgLs 9Y0w== X-Gm-Message-State: APjAAAVULoNmzEVhJhamskaPyalsZGlE594DFgWQVbyVEnL6ItP1FZKZ 9EC8sz/ElIk5iQG4aGEAwgdPXkbJdcBViYIq1XixLWjwKrZV+2nhtbqZe24YoNDR7toLXGSPZz4 +DLXX1pAX9c2wp/iDJxM/ptzZ1dCen04IT7fK+ImO8owKE4dsCGS46zcQK/PJtUFEKOSf5iE9gM GNvqIM5R9JhqEseGo= 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190506_093149_922372_51D941E5 X-CRM114-Status: GOOD ( 11.22 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Szabolcs Nagy , Catalin Marinas , Will Deacon , Kostya Serebryany , Felix Kuehling , Vincenzo Frascino , Jacob Bramley , Leon Romanovsky , Dave Martin , Evgeniy Stepanov , Kevin Brodsky , Kees Cook , Ruben Ayrapetyan , Andrey Konovalov , Lee Smith , Alex Williamson , Mauro Carvalho Chehab , Dmitry Vyukov , Greg Kroah-Hartman , Yishai Hadas , Jens Wiklander , Ramana Radhakrishnan , Alexander Deucher , Andrew Morton , Robin Murphy , Christian Koenig , Luc Van Oostenryck Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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;