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[209.85.220.73]) by mx.google.com with SMTPS id x21sor1076601otq.43.2019.06.03.09.56.10 for (Google Transport Security); Mon, 03 Jun 2019 09:56:10 -0700 (PDT) Received-SPF: pass (google.com: domain of 3kvh1xaokci4s5v9wg25d3y66y3w.u64305cf-442dsu2.69y@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="aMwQlO/u"; spf=pass (google.com: domain of 3kvh1xaokci4s5v9wg25d3y66y3w.u64305cf-442dsu2.69y@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3KVH1XAoKCI4s5v9wG25D3y66y3w.u64305CF-442Dsu2.69y@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=UdKHGBZnbXnYOdacGwXVLbo2mp7I3OpbNnEy2rn9dE0=; b=aMwQlO/uqKNquhxQCaOybakc925QpZfJO8wh15xEZQIyCg72vlDGXrUg/ROAuoQDUD yCBHc/elg2gmmBaFllCt7o9fko/cMYEXNqMBN5Ib8jP974H6cgrFWFCLBOtmTziaRGQQ SwI/Xt1vXIDm1HuVmNbFHcArxU2bsmwx6xs/PbNEoDywCtOeBm47QoZ+wae08e7pzq/K a7mRKG2GqnFCVji4AY+94HQ5eVsYgsMp8E/PA4r/OPS0psFqvjDQbyz4YEbR/PgBj2Aq 436HnabGuSm3Rvtg2LN9VhA8Rs2mRcn4xgL77EZC0LMuRu0EvZQAUUg9zFkbP9a8AWHr YN2w== X-Google-Smtp-Source: APXvYqxMjN/4yHR2ThXEEFJeDuxNxY18SC+MmNXgYJ7rlNGji/L0sGyo9f6aEs2c6lSgFUC7mMKDb3c6mMlyiMDt X-Received: by 2002:a9d:4109:: with SMTP id o9mr1768838ote.353.1559580969728; Mon, 03 Jun 2019 09:56:09 -0700 (PDT) Date: Mon, 3 Jun 2019 18:55:16 +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 14/16] 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 , 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. 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 49fd7312e2aa..96945f4cefb8 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; -- 2.22.0.rc1.311.g5d7573a151-goog