From nobody Tue Apr 7 16:28:42 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B61F8ECAAD5 for ; Fri, 26 Aug 2022 15:09:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231171AbiHZPJY (ORCPT ); Fri, 26 Aug 2022 11:09:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244087AbiHZPIk (ORCPT ); Fri, 26 Aug 2022 11:08:40 -0400 Received: from mail-ej1-x649.google.com (mail-ej1-x649.google.com [IPv6:2a00:1450:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF656DC5DE for ; Fri, 26 Aug 2022 08:08:28 -0700 (PDT) Received: by mail-ej1-x649.google.com with SMTP id sa33-20020a1709076d2100b0073d83e062c8so720214ejc.0 for ; Fri, 26 Aug 2022 08:08:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc; bh=P3BIEQv1T/KwZafUGZKUBc98ocOSrUKFpAGAcrUMbqQ=; b=Gfe3GoUcVz2DJqv+lUhS4wPJK1FSFGYSNmq3/sHYEp2DjOH5v5GNBK/z6hDTUoKcTj plBctrN9vrg8FpJag++EbXU4mr1O64PW/1loKp8KRZuDnOsIEMr3eAKPs++1evafDhuT A/bg0Xtm8uNzHgCE9+qQSnmN9op+um7DtTIxTFv5pIn/W8yBUx7UfecmpyVTt+dfsVnq R6+GNW8d47HlvsNhFF9IMt3QQ4Pdb3IpCNIvyzbkPzXHWf3cKsNzlrqWxpwtGBf+/qyd MYf6zzuhfYx17T33BFzvicCgkqik20kUTnJTp2XnCJSTdNO9O0hyzdD6GKvImE6ONG+Q idug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc; bh=P3BIEQv1T/KwZafUGZKUBc98ocOSrUKFpAGAcrUMbqQ=; b=HTVuYewMCGO4JVKnUr8a5s7TGWeMIs+qZ0zGL0ZF7KpejfK8FwV6A2VI1xk0+zxU+V HCLizyGtmBt8jTH0bxzZECJWH73xoC8CQTYYr5wLeTnZEZVW6MGqtFhCeA7uTIE8+aOm sdnwvvL1PS3SAXJd0Xeha4SNJG41Gkyuap1PhG6phfBkEHg/eWdJj7Ynta0PQUKIMY23 AtVDXwVBhEzfQgFxNSR/MkAUGUuvYoeftogXiZcflIKSnmFEOC1WZWIe4TyHYhIxcMCm XMpRjZP75tKg/rofwbMzaMukCWRKxyV9AJ9kwcHjLoe/V/p6MHRV8XJcrx60E+vlex4v 6mTA== X-Gm-Message-State: ACgBeo27XPCzBa0LUcKLZ6tGMY2QUbFltc8fi9HxJGMlQT9APTG4h5Sm vBhL7s+u6aohrd8seeC1Xt9Q5ZKJP88= X-Google-Smtp-Source: AA6agR7pRi8WRPCHvWZyrbJ+uMb1xTdRgH4930Ca34TprE6WyeH/LJquvC2M2sAE+eo6XOjsPj4V5JP8Hdk= X-Received: from glider.muc.corp.google.com ([2a00:79e0:9c:201:5207:ac36:fdd3:502d]) (user=glider job=sendgmr) by 2002:a17:907:c06:b0:701:eb60:ded with SMTP id ga6-20020a1709070c0600b00701eb600dedmr5913732ejc.178.1661526507100; Fri, 26 Aug 2022 08:08:27 -0700 (PDT) Date: Fri, 26 Aug 2022 17:07:28 +0200 In-Reply-To: <20220826150807.723137-1-glider@google.com> Mime-Version: 1.0 References: <20220826150807.723137-1-glider@google.com> X-Mailer: git-send-email 2.37.2.672.g94769d06f0-goog Message-ID: <20220826150807.723137-6-glider@google.com> Subject: [PATCH v5 05/44] asm-generic: instrument usercopy in cacheflush.h From: Alexander Potapenko To: glider@google.com Cc: Alexander Viro , Alexei Starovoitov , Andrew Morton , Andrey Konovalov , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Christoph Hellwig , Christoph Lameter , David Rientjes , Dmitry Vyukov , Eric Dumazet , Greg Kroah-Hartman , Herbert Xu , Ilya Leoshkevich , Ingo Molnar , Jens Axboe , Joonsoo Kim , Kees Cook , Marco Elver , Mark Rutland , Matthew Wilcox , "Michael S. Tsirkin" , Pekka Enberg , Peter Zijlstra , Petr Mladek , Steven Rostedt , Thomas Gleixner , Vasily Gorbik , Vegard Nossum , Vlastimil Babka , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Notify memory tools about usercopy events in copy_to_user_page() and copy_from_user_page(). Signed-off-by: Alexander Potapenko Reviewed-by: Marco Elver --- v5: -- cast user pointers to `void __user *` Link: https://linux-review.googlesource.com/id/Ic1ee8da1886325f46ad67f52176= f48c2c836c48f --- include/asm-generic/cacheflush.h | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/include/asm-generic/cacheflush.h b/include/asm-generic/cachefl= ush.h index 4f07afacbc239..f46258d1a080f 100644 --- a/include/asm-generic/cacheflush.h +++ b/include/asm-generic/cacheflush.h @@ -2,6 +2,8 @@ #ifndef _ASM_GENERIC_CACHEFLUSH_H #define _ASM_GENERIC_CACHEFLUSH_H =20 +#include + struct mm_struct; struct vm_area_struct; struct page; @@ -105,14 +107,22 @@ static inline void flush_cache_vunmap(unsigned long s= tart, unsigned long end) #ifndef copy_to_user_page #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { \ + instrument_copy_to_user((void __user *)dst, src, len); \ memcpy(dst, src, len); \ flush_icache_user_page(vma, page, vaddr, len); \ } while (0) #endif =20 + #ifndef copy_from_user_page -#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ - memcpy(dst, src, len) +#define copy_from_user_page(vma, page, vaddr, dst, src, len) \ + do { \ + instrument_copy_from_user_before(dst, (void __user *)src, \ + len); \ + memcpy(dst, src, len); \ + instrument_copy_from_user_after(dst, (void __user *)src, len, \ + 0); \ + } while (0) #endif =20 #endif /* _ASM_GENERIC_CACHEFLUSH_H */ --=20 2.37.2.672.g94769d06f0-goog