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[209.85.220.73]) by mx.google.com with SMTPS id u17sor1680981qvm.7.2019.06.03.09.55.36 for (Google Transport Security); Mon, 03 Jun 2019 09:55:36 -0700 (PDT) Received-SPF: pass (google.com: domain of 3cfh1xaokcg0lyocpjvygwrzzrwp.nzxwtyfi-xxvglnv.zcr@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=ew82e7Nz; spf=pass (google.com: domain of 3cfh1xaokcg0lyocpjvygwrzzrwp.nzxwtyfi-xxvglnv.zcr@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3CFH1XAoKCG0LYOcPjVYgWRZZRWP.NZXWTYfi-XXVgLNV.ZcR@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=luHVeQDtsejNe05MbpEHIJ5FAOspLsm1rW4+f3IOXdc=; b=ew82e7NzIq+8fpVjdyGeAl2NjSKK4p0nGZ5QsTZKvqtsLjuuAXvE063KXb+pD0cHy3 33+cPut/htgPr27GTzwOcJ20GBX2Ux9NssttTzwHChq9HvO45Yd1WsNH+qMaKhyQDDTc D+9zMoo5SrYePAGdOkXZXmMQhF2t0ypsOVpok1EOYB7sNktF/Rh9uldB40uKjOJapI1g axLdF69gRV4YSFbj/UQdIsHxS2aGe/kJaiIGVBIH5qRmQS2qsSWYGny0rQfE2+NQmVfF bjXTeOgusRer2Jz6pFuYk/PEgndLJQ02z9T1gNTKOM3uuFHRlwHl2aCc1w3EkCHnhf6g ZiTA== X-Google-Smtp-Source: APXvYqxWajnT2+NV3xTud3R56ZNhfS6I5UrUDe55n3y1jJe3OWUToUGKN+BmVqJ0YCPX/M4xXQWJhyPq+bf/72n5 X-Received: by 2002:a0c:ad23:: with SMTP id u32mr3896810qvc.39.1559580936412; Mon, 03 Jun 2019 09:55:36 -0700 (PDT) Date: Mon, 3 Jun 2019 18:55:06 +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 04/16] mm: untag user pointers in do_pages_move 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. do_pages_move() is used in the implementation of the move_pages syscall. Untag user pointers in this function. Reviewed-by: Catalin Marinas Signed-off-by: Andrey Konovalov --- mm/migrate.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/migrate.c b/mm/migrate.c index f2ecc2855a12..3930bb6fa656 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1617,6 +1617,7 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes, if (get_user(node, nodes + i)) goto out_flush; addr = (unsigned long)p; + addr = untagged_addr(addr); err = -ENODEV; if (node < 0 || node >= MAX_NUMNODES) -- 2.22.0.rc1.311.g5d7573a151-goog