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bh=E5WO9ODhUeb7gchIl3e11LSllsWmM1E2YpuEe+KMyVo=; b=AUJ5Q7I8wTgK6H1Z6iVTrYpgFQxoAVYmjENPg87BaACiqOX30XayCu3EYFe8pivnMY RdHOWjdqU4xdu+j+GksYfXPIq9bSuspsmJGdLcfpm+MQPXlMsrCHInJ/tTTQis2uEic0 m3+dexnG0+BA31BJ3Xl+sj5z6Ff8mz1mLKWtjmT4IrmAQLAqTZFqJDKZ1apRPUl4imiz sgPde8DXqaZxwXX9SCcp+yN6349wQgsFRtlAQPYk0Ixn5cEqbzTQZp4nNdwpr+sYf+YB IY0mIwMKRx39Ad/5q5bW/4+blUToshUDP1J8roJcwW7nndZIEb52n125eCLE4bHjDnSx B0cw== X-Gm-Message-State: APjAAAXWe4mOBagOXEgLLeHgKXcXTxQYve6ejhEVCSaTMilt/+NZy2Lc 382XqyRtvAW4O9Kg4j26otaFpVNLgW/p+QWoK2+RiE/OZsM1FSlauNRdteBb5qZw8SvtQRljt4O i68cs5HN1uZctZaT0O9jSzo4o9Me2EGuNnlBC1B7eFARxs+6zuVjHtlTESLPJ83/kDAMTJS1Kjq 3zw6IEK7mGxoOz80k= 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190506_123157_851575_14B46DDA X-CRM114-Status: GOOD ( 13.04 ) 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. 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;