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[209.85.220.73]) by mx.google.com with SMTPS id f10sor2660256ywb.6.2019.04.30.06.26.04 for (Google Transport Security); Tue, 30 Apr 2019 06:26:04 -0700 (PDT) Received-SPF: pass (google.com: domain of 37ezixaokcjmxa0e1l7ai83bb381.zb985ahk-997ixz7.be3@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=FRME1COe; spf=pass (google.com: domain of 37ezixaokcjmxa0e1l7ai83bb381.zb985ahk-997ixz7.be3@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=37EzIXAoKCJMxA0E1L7AI83BB381.zB985AHK-997Ixz7.BE3@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=5vVbThWFeNTYFxwbQq67jdT1oZny+xOKBFoxX+2Uk7M=; b=FRME1COezh5b+xsqn4P+Wuk9kST7usWvir2xQhAmIzYbqhd+Dle1XM/PaJl5NwGBwF z7/SMrTqJtHy/gO4CF7xbqlFAwpIk8PwR9mnXkXEY1b5HFuyeguAZJRX9uVnCx/+N6Cg GdXjue/eQFQ6wfKzJUzNubo15IJ6ki/RwkeGwPRaQhUCcsmSJMlmZ6DdqtqFu3fOL0bX 01e0qP9aKT8hITIugatecY8TuWXLv4w13ho7n2rx3qvyQwxwSmnnV+ESWDP6rPMjBLm6 9em8VBa1zwsikfNNQo9I2iNQIYFHDIjY+xXevJ0y76Ma6MtOAyKoTjWTXLT8lERzPHTd 0Kew== X-Google-Smtp-Source: APXvYqyv8kHiq9IuRt8k8uxL630nsRVEEuszbAKJggJOMl5SWFBjzMAnW0IWxRwAYYoqlPXLLWZ5sEsVnC5FF0Vx X-Received: by 2002:a81:3c89:: with SMTP id j131mr56890450ywa.183.1556630764032; Tue, 30 Apr 2019 06:26:04 -0700 (PDT) Date: Tue, 30 Apr 2019 15:25:11 +0200 In-Reply-To: Message-Id: <1b2a46dbfa24bde41f11cff6f53683a5ea5915c7.1556630205.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog Subject: [PATCH v14 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 , Kuehling@google.com, Felix , Deucher@google.com, Alexander , Koenig@google.com, Christian , 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 , Chintan Pandya , 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;