Message ID | 80f7d6a2f68adb1c41ef5baf8973537380c681b0.1556630205.git.andreyknvl@google.com (mailing list archive) |
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State | New, archived |
Headers | show
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[209.85.220.73]) by mx.google.com with SMTPS id f65sor4455312vsd.43.2019.04.30.06.25.36 for <linux-mm@kvack.org> (Google Transport Security); Tue, 30 Apr 2019 06:25:36 -0700 (PDT) Received-SPF: pass (google.com: domain of 30ezixaokchcviymztfiqgbjjbgz.xjhgdips-hhfqvxf.jmb@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=pHAUFUPI; spf=pass (google.com: domain of 30ezixaokchcviymztfiqgbjjbgz.xjhgdips-hhfqvxf.jmb@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=30EzIXAoKCHcViYmZtfiqgbjjbgZ.Xjhgdips-hhfqVXf.jmb@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=CVV6psz/Vns5azsm7jZt0BKocrzPfr2CsD5f51mITmQ=; b=pHAUFUPIK00HUvs8fYzbfMDhOtYuRZOYj18jl6SUOemiz8hMuVoEwpyBcBFZsdPfRy CP69mD/DWkxSBrhRr7+Ao/OQBLtynTBk0B9gn31tW8yWHjU69Q7PB4ZDpgvtdnhUTEzK 8CbwpHg2uux/P91ru8mr0G2/NpJ+DVwloVARu7ft7n27vA6hkWJDGMY1mugB3YmYuyhT OwmXeDxT9woV4yHQlsAA+KWTEq0dG80iCwsoH+0J1dhKu1C33LiknxZR75he7h2J78XE ZKdvpYjQpomJrWqZzF9raVXk6z/lSdaqbAYdD0YzglrS0vRmztdJidedrkfiqCqRVd3N hnSw== X-Google-Smtp-Source: APXvYqxbH0hW8IUGPJRsH+MKg4I9yJOI2DrUXBayHbDSUEVQsqLwVaAkxsd+/0KcP5RvItcIqz2adgVjyHXkB8kF X-Received: by 2002:a67:dd01:: with SMTP id y1mr18718014vsj.39.1556630736057; Tue, 30 Apr 2019 06:25:36 -0700 (PDT) Date: Tue, 30 Apr 2019 15:25:02 +0200 In-Reply-To: <cover.1556630205.git.andreyknvl@google.com> Message-Id: <80f7d6a2f68adb1c41ef5baf8973537380c681b0.1556630205.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1556630205.git.andreyknvl@google.com> X-Mailer: git-send-email 2.21.0.593.g511ec345e18-goog Subject: [PATCH v14 06/17] mm: untag user pointers in do_pages_move From: Andrey Konovalov <andreyknvl@google.com> 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 <catalin.marinas@arm.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Will Deacon <will.deacon@arm.com>, Mark Rutland <mark.rutland@arm.com>, Andrew Morton <akpm@linux-foundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Kees Cook <keescook@chromium.org>, Yishai Hadas <yishaih@mellanox.com>, Kuehling@google.com, Felix <Felix.Kuehling@amd.com>, Deucher@google.com, Alexander <Alexander.Deucher@amd.com>, Koenig@google.com, Christian <Christian.Koenig@amd.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Jens Wiklander <jens.wiklander@linaro.org>, Alex Williamson <alex.williamson@redhat.com>, Leon Romanovsky <leon@kernel.org>, Dmitry Vyukov <dvyukov@google.com>, Kostya Serebryany <kcc@google.com>, Evgeniy Stepanov <eugenis@google.com>, Lee Smith <Lee.Smith@arm.com>, Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>, Jacob Bramley <Jacob.Bramley@arm.com>, Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>, Robin Murphy <robin.murphy@arm.com>, Chintan Pandya <cpandya@codeaurora.org>, Luc Van Oostenryck <luc.vanoostenryck@gmail.com>, Dave Martin <Dave.Martin@arm.com>, Kevin Brodsky <kevin.brodsky@arm.com>, Szabolcs Nagy <Szabolcs.Nagy@arm.com>, Andrey Konovalov <andreyknvl@google.com> 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: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
arm64: untag user pointers passed to the kernel
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diff --git a/mm/migrate.c b/mm/migrate.c index 663a5449367a..c014a07135f0 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)
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. Signed-off-by: Andrey Konovalov <andreyknvl@google.com> --- mm/migrate.c | 1 + 1 file changed, 1 insertion(+)