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[209.85.220.73]) by mx.google.com with SMTPS id o25sor5284316vsp.47.2019.05.06.09.31.53 for (Google Transport Security); Mon, 06 May 2019 09:31:53 -0700 (PDT) Received-SPF: pass (google.com: domain of 3ewhqxaokcgoivlzmgsvdtowwotm.kwutqvcf-uusdiks.wzo@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=ZAV3tC6y; spf=pass (google.com: domain of 3ewhqxaokcgoivlzmgsvdtowwotm.kwutqvcf-uusdiks.wzo@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3eWHQXAoKCGoIVLZMgSVdTOWWOTM.KWUTQVcf-UUSdIKS.WZO@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=E5WO9ODhUeb7gchIl3e11LSllsWmM1E2YpuEe+KMyVo=; b=ZAV3tC6ygeuQpYDYrKMnamvWU4Ola27jwmOvJT0NrB9zkA9/9VwZpqZILeD/kCkNoz 2YieZRVMa/AXiEzwBIxCU1l+GEYmKclsxxyQTiWJfi3V4eZQV5Ty6cVbJ946qs6vtwua FnVZYy8h8LlcT9zEGoHGJFhxw76fNhlXkwiMMdgNAFJQ0fdrxIy60WNM3Dx5/MSJjbMm JoRnUusKGOL9DOHOG1d4lxStTE2KnFUHyp2053KQyza8HaWrD88UcCSEHERhBeycqSfG PaS1O1Y2zDlyyujLwl9tuNkVlIoFOsc0GRtgaeegMD911ZalfKNXqOUfZljQAA2/cuom 1W3Q== X-Google-Smtp-Source: APXvYqw1xOoCnPO8YfwpZ5nRgaPpPr24xspNBV17LLiBFtD2eWt0/j9p08QSESkEcGjJ9SGNKNyhv8KaV3q9K4HX X-Received: by 2002:a67:efcc:: with SMTP id s12mr4512139vsp.120.1557160313543; Mon, 06 May 2019 09:31:53 -0700 (PDT) Date: Mon, 6 May 2019 18:31:01 +0200 In-Reply-To: Message-Id: Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 15/17] tee, arm64: untag user pointers in tee_shm_register 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 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: 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. tee_shm_register()->optee_shm_unregister()->check_mem_type() uses provided user pointers for vma lookups (via __check_mem_type()), which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- drivers/tee/tee_shm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 0b9ab1d0dd45..8e7b52ab6c63 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -263,6 +263,7 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr, shm->teedev = teedev; shm->ctx = ctx; shm->id = -1; + addr = untagged_addr(addr); start = rounddown(addr, PAGE_SIZE); shm->offset = addr - start; shm->size = length;