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[209.85.220.73]) by mx.google.com with SMTPS id h128sor2526966pgc.33.2019.03.20.07.52.43 for (Google Transport Security); Wed, 20 Mar 2019 07:52:43 -0700 (PDT) Received-SPF: pass (google.com: domain of 3u1osxaokcjy0d3h4oadlb6ee6b4.2ecb8dkn-ccal02a.eh6@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=UEIrebSo; spf=pass (google.com: domain of 3u1osxaokcjy0d3h4oadlb6ee6b4.2ecb8dkn-ccal02a.eh6@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3u1OSXAoKCJY0D3H4OADLB6EE6B4.2ECB8DKN-CCAL02A.EH6@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=f9ERttYki6e1riSpYQlVbWsSBMZZ5wUdNGpNySk9y5Q=; b=UEIrebSocaYvFV95VdsGvR0rHtsKUFScYsCVqiArhFekiKhlWYwiMy63Q0mC7IZj9p 3mqU7Dbhm6OqOVB4ThhETYV9ikDo0pqEW49iSRluDE7bkzQRnUB022yUHTxms2owX+51 Hl02fMI+fjjQXXTnP9hJUKytXL22/eMlF/bW9F6Y2oo6WfEnYpRt49Ftd9iSm88pEvyR KMbIbd0h7q6Pew5AmmXiW7TnoUcvWa8wf/gj7ZnzJQoLjgL/IjA++G9JudTdsHLO21Cq CbofADar+N5IG2433ecku3GOiSdWNlbt2i7KcQfTHs/DmBtW8hG6MdXe8FPq3GsM/Hb6 HDrw== X-Google-Smtp-Source: APXvYqw7j6q1fx3m56nHOtW1Q2mzw9Sw141YoRGaaXVbYutXBT4BRu1TSW8d2p37GhTJbzzsOqgRxlx9WtXnbKVc X-Received: by 2002:a63:2ac2:: with SMTP id q185mr3933319pgq.119.1553093563022; Wed, 20 Mar 2019 07:52:43 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:32 +0100 In-Reply-To: Message-Id: <665632a911273ab537ded9acb78f4bafd91cbc19.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v13 18/20] tee/optee, arm64: untag user pointers in check_mem_type From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Alex Deucher , "=?UTF-8?q?Christian=20K=C3=B6nig?=" , "David (ChunMing) Zhou" , Yishai Hadas , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@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, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Dave Martin , 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. 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/optee/call.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c index a5afbe6dee68..e3be20264092 100644 --- a/drivers/tee/optee/call.c +++ b/drivers/tee/optee/call.c @@ -563,6 +563,7 @@ static int check_mem_type(unsigned long start, size_t num_pages) int rc; down_read(&mm->mmap_sem); + start = untagged_addr(start); rc = __check_mem_type(find_vma(mm, start), start + num_pages * PAGE_SIZE); up_read(&mm->mmap_sem); -- 2.21.0.225.g810b269d1ac-goog