Message ID | a5fff68a32941ebce02dbe48f554a76a9c7a36ce.1552679409.git.andreyknvl@google.com |
---|---|
State | Not Applicable |
Delegated to: | David Miller |
Headers | show
Return-Path: <netdev-owner@vger.kernel.org> X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=<UNKNOWN>) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="FNIVGISA"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 44Lbnz5DXsz9s9h for <patchwork-incoming-netdev@ozlabs.org>; Sat, 16 Mar 2019 06:52:23 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727554AbfCOTwW (ORCPT <rfc822;patchwork-incoming-netdev@ozlabs.org>); Fri, 15 Mar 2019 15:52:22 -0400 Received: from mail-qk1-f201.google.com ([209.85.222.201]:42757 "EHLO mail-qk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727529AbfCOTwT (ORCPT <rfc822;netdev@vger.kernel.org>); Fri, 15 Mar 2019 15:52:19 -0400 Received: by mail-qk1-f201.google.com with SMTP id 77so6887434qkd.9 for <netdev@vger.kernel.org>; Fri, 15 Mar 2019 12:52:19 -0700 (PDT) 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=REP9LhKq3azFcE3epBwHjl0z4e4u8qSodB2K6JOUUqY=; b=FNIVGISAdAEFbreSsDDijAXV7iz7bJ+nqAbnQIHGv5JyzeZ7lcBCJx59d3veVulKlh 7jE3udTRD8ZB4FsTnM9RGbtkCH/mbxzWvFL0H4sXjQx4qi2m5t5ro7oy5rhM45nSVVBP 5ClTpMIvyiu2q1I0rCYKPmV2nRUW01xZpnfJIxUQMHQ44ykxwcrzRx307eckpZorbuN3 6VEq4E+w7Q2yQVpjsHzE5SdEEFgZlQL/gXacFSIer7uFwLUhfH2E6+fmsaTjr28zvsU3 LxduxWE/YJsel6dur8r7Ne5zecAEIXKRCQ6ztsVh51aCO/ECwJBztr37RmWaHcFGyfRo FPEA== X-Google-DKIM-Signature: v=1; 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=REP9LhKq3azFcE3epBwHjl0z4e4u8qSodB2K6JOUUqY=; b=nHp7HKoIOXAZR+kdOxuAUw9Qn06tdqzhJgGG/uujnDYeioXzRXKtgmie7yKMvvOw+Y zf9+oqSOerQ0YZ6fwkL8VulGeY9yQp9YQMTk4RtpO+zRLgnYU9FHlx3ogOZSmXWJSlmO qTqebkPruh5PVy02v21flDODC1B8sFgW9XxixbWqROJzpi2qOyVS9pVVmAipWUbI4UD5 VTf7xJ3A5PwXgcXOVnbtM97ASpHasoFad6VOva2ECmOnIOgGUzcrtSfSXrLEuWNgQeeV 64zbdK29kIkMiQzwhgirxPKa+8ia6vzcepohdlNOd0US/zeCrLLZZNd0J9HhsAMPu0je ETxg== X-Gm-Message-State: APjAAAVQjR4NtzTLk66dPc7DHd8gPgFkHVrf8fhTKdUmRTzE5wVxK/N1 WJtduQMcBC6Vct0DXU5aLp1taGKRMTmXOoch X-Google-Smtp-Source: APXvYqwJcWbE90DsufpIchU1RWZDjZYiH/OdYEaqepbyMZK8dYdaYAIDqIiN21SA2dhnlvcWp5RKO708a/U1e0LV X-Received: by 2002:ac8:2d7c:: with SMTP id o57mr3149114qta.39.1552679538830; Fri, 15 Mar 2019 12:52:18 -0700 (PDT) Date: Fri, 15 Mar 2019 20:51:35 +0100 In-Reply-To: <cover.1552679409.git.andreyknvl@google.com> Message-Id: <a5fff68a32941ebce02dbe48f554a76a9c7a36ce.1552679409.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1552679409.git.andreyknvl@google.com> X-Mailer: git-send-email 2.21.0.360.g471c308f928-goog Subject: [PATCH v11 11/14] uprobes, arm64: untag user pointers in find_active_uprobe From: Andrey Konovalov <andreyknvl@google.com> To: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Mark Rutland <mark.rutland@arm.com>, Robin Murphy <robin.murphy@arm.com>, Kees Cook <keescook@chromium.org>, Kate Stewart <kstewart@linuxfoundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@kernel.org>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Shuah Khan <shuah@kernel.org>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Eric Dumazet <edumazet@google.com>, "David S. Miller" <davem@davemloft.net>, Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Arnaldo Carvalho de Melo <acme@kernel.org>, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: 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>, 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" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: <netdev.vger.kernel.org> X-Mailing-List: netdev@vger.kernel.org |
Series |
arm64: untag user pointers passed to the kernel
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expand
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diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index c5cde87329c7..d3a2716a813a 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1992,6 +1992,8 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp) struct uprobe *uprobe = NULL; struct vm_area_struct *vma; + bp_vaddr = untagged_addr(bp_vaddr); + down_read(&mm->mmap_sem); vma = find_vma(mm, bp_vaddr); if (vma && vma->vm_start <= bp_vaddr) {
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. find_active_uprobe() uses provided user pointer (obtained via instruction_pointer(regs)) for vma lookups, which can only by done with untagged pointers. Untag the user pointer in this function. Signed-off-by: Andrey Konovalov <andreyknvl@google.com> --- kernel/events/uprobes.c | 2 ++ 1 file changed, 2 insertions(+)