Message ID | 474b3c113edae1f2fa679dc7237ec070ff4efb70.1557160186.git.andreyknvl@google.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=ngD1QIqwofb3Y9K5MW1PYIryx3q7PiTEQfc6RhUnaA4=; b=s1WL9EqOk7gCqtm6LIL4oakDgyKY/GaUepC741vpEa9wJvjlQOLV9kr0LtDa3H7YZN 3CFHFxfOnNo/8TPCR6HCHe8VCrgnlm/lyyvMmxYUM3qZqPWBvMAsezJX6yNBt+4eAMwg 0VrcdZi9LBg2KN8yQoICmNW4An65eQYzox9i625kD/DRiHM0CL9XXW4YoxTG2c8hvQpF QtfAfgXpdKPaeg0jvb9PotliQR+LEmwYYAEweRwWGJ4ezz1vfFeW7EQsGyZQ7Le4yTJp l5cXR4C9U2Vibt6cb/5x5vhbtELxMOJAeJO79LsRZRqDWXcPIRv7Q9bZj/y6+1plpgZJ cfXg== X-Gm-Message-State: APjAAAX8qA2YtwJdOFCbf1qwu3ExmHId4Fm5pCAl/LwsLjv7RM0T3+c3 6jH8aCgr+rv0P5gk56bgUHs8D0woI/mHHTqHDACmAjR5OyW0361US0EBmQCW/tEQO1iwLe/XUCv ZjRNE5xfJ+75poM05w/1TkP0UKvzZpxxwj/ELhP8px2V2O9ZICkBmKzKochbJuJdrAz4mELvesr poH2rDE7dL4fbFzx8= X-Google-Smtp-Source: APXvYqwpCSWnm5qxXyuaWGAqRu95+6gB9zDmbHbxq+0Vb45FEs/ziN6+T3PbyTnxcvdIphfk21MnSe6Qp4R1y+WG X-Received: by 2002:a1f:b45:: with SMTP id 66mr13881567vkl.38.1557160285529; Mon, 06 May 2019 09:31:25 -0700 (PDT) Date: Mon, 6 May 2019 18:30:52 +0200 In-Reply-To: <cover.1557160186.git.andreyknvl@google.com> Message-Id: <474b3c113edae1f2fa679dc7237ec070ff4efb70.1557160186.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1557160186.git.andreyknvl@google.com> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [PATCH v15 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190506_093128_646464_F237B876 X-CRM114-Status: GOOD ( 12.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: <linux-arm-kernel.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/> List-Post: <mailto:linux-arm-kernel@lists.infradead.org> List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe> Cc: Mark Rutland <mark.rutland@arm.com>, Szabolcs Nagy <Szabolcs.Nagy@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Kostya Serebryany <kcc@google.com>, Felix Kuehling <Felix.Kuehling@amd.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Jacob Bramley <Jacob.Bramley@arm.com>, Leon Romanovsky <leon@kernel.org>, Dave Martin <Dave.Martin@arm.com>, Evgeniy Stepanov <eugenis@google.com>, Kevin Brodsky <kevin.brodsky@arm.com>, Kees Cook <keescook@chromium.org>, Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>, Andrey Konovalov <andreyknvl@google.com>, Lee Smith <Lee.Smith@arm.com>, Alex Williamson <alex.williamson@redhat.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Dmitry Vyukov <dvyukov@google.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Yishai Hadas <yishaih@mellanox.com>, Jens Wiklander <jens.wiklander@linaro.org>, Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>, Alexander Deucher <Alexander.Deucher@amd.com>, Andrew Morton <akpm@linux-foundation.org>, Robin Murphy <robin.murphy@arm.com>, Christian Koenig <Christian.Koenig@amd.com>, Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
arm64: untag user pointers passed to the kernel
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On Mon, May 06, 2019 at 06:30:52PM +0200, Andrey Konovalov wrote: > 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> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
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(+)