From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14731C43462 for ; Sat, 10 Apr 2021 23:41:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D7F75610A3 for ; Sat, 10 Apr 2021 23:41:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235162AbhDJXkG (ORCPT ); Sat, 10 Apr 2021 19:40:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32838 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234975AbhDJXkF (ORCPT ); Sat, 10 Apr 2021 19:40:05 -0400 Received: from mail-oi1-x232.google.com (mail-oi1-x232.google.com [IPv6:2607:f8b0:4864:20::232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0903EC06138B for ; Sat, 10 Apr 2021 16:39:50 -0700 (PDT) Received: by mail-oi1-x232.google.com with SMTP id k18so4861409oik.1 for ; Sat, 10 Apr 2021 16:39:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=jbh9yWlGg2BNKfvTRjSRQJvtgak2JcPfucDME7L6Hms=; b=TDBrsBDOgQO2yz/IwOBWyZR3aeSBrlRYc88mJ0J3cuHmUATj33Nln6vqyboKsUOsUO KJvirM9eVf8WlNTnuoHT9pO46Rqlzs+DvxPBdh7oNqv03EJ2AG3zKiuooprzoMi9xha+ Hey/Jx4jsjv6bKpqpewrPEI4Hf41pmU3hXLiKE7nuPa0kn7tXlzkRLKDtpTkt67hvytH 9+oZv1V2zlwZd1cZqhNT44nqtmAR+g5MvMZpdE7yLRY7TDe/FKLVRA3pb1UamuLM4ftS p9gxLMTr2VV0kQqB6u1I3QU9hVO63b/tpLpN0ajg/bzqZUymsd4HPDHF29r+cVMRvLsQ S8ng== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=jbh9yWlGg2BNKfvTRjSRQJvtgak2JcPfucDME7L6Hms=; b=Wncs0s+pHjqzFYGyxD/CUcMvZIwFKevppAnDkURR2uDL1AEYdJzIZvmei4GBPxPf65 PZqS41LJsuOw9ctRDTcjrdJk9ErPwo/k9aGMcUVZqTkACWDeIimoP+ZZ9JcYw95YY6zk D3aK4dt6wjC3GnfIOpPNmMtCEThYfbWHhNB0uKMwBBNQP0yNmUd/dO9rtMob27X1BZcQ 9MRImdon7zqN6KjE9gFMfG65ylNB9wIXAkGWn3bCxAufoBa3/9mcgwMtVzkUkeJzldmQ yyfFw4LciLA0osZiAAFjf2xygBi81ZatmanRu6abx3ypgfUPNWq7owRL4+10w6AWi0gq HBrw== X-Gm-Message-State: AOAM530SMdhWu3MkkzszwxdywrV2JnSJuB11bUDtMzg1ekdSqyud9qAu L24y3xS8Us27/3VQdVKyiy4uiKyrbjo= X-Google-Smtp-Source: ABdhPJyTDoW2zL12quMalKfpVkWtz6CY7vQs+OXkH7mWHcoSSFAacdHFNAIa9Rjp/Om/Bw+pFB14Kg== X-Received: by 2002:aca:cf95:: with SMTP id f143mr14594033oig.104.1618097989394; Sat, 10 Apr 2021 16:39:49 -0700 (PDT) Received: from localhost ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id p3sm1645085otk.9.2021.04.10.16.39.47 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sat, 10 Apr 2021 16:39:48 -0700 (PDT) Sender: Guenter Roeck Date: Sat, 10 Apr 2021 16:39:47 -0700 From: Guenter Roeck To: Christophe Leroy Cc: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , cmr@codefail.de, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 08/10] powerpc/signal32: Convert restore_[tm]_user_regs() to user access block Message-ID: <20210410233947.GA202696@roeck-us.net> References: <181adf15a6f644efcd1aeafb355f3578ff1b6bc5.1616151715.git.christophe.leroy@csgroup.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <181adf15a6f644efcd1aeafb355f3578ff1b6bc5.1616151715.git.christophe.leroy@csgroup.eu> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 19, 2021 at 11:06:57AM +0000, Christophe Leroy wrote: > Convert restore_user_regs() and restore_tm_user_regs() > to use user_access_read_begin/end blocks. > > Signed-off-by: Christophe Leroy > --- ... > static long restore_user_regs(struct pt_regs *regs, > struct mcontext __user *sr, int sig) > { ... > @@ -567,19 +569,22 @@ static long restore_user_regs(struct pt_regs *regs, > regs->msr &= ~MSR_SPE; > if (msr & MSR_SPE) { > /* restore spe registers from the stack */ > - if (__copy_from_user(current->thread.evr, &sr->mc_vregs, > - ELF_NEVRREG * sizeof(u32))) > - return 1; > + unsafe_copy_from_user(current->thread.evr, &sr->mc_vregs, > + ELF_NEVRREG * sizeof(u32)); arch/powerpc/kernel/signal_32.c: In function 'restore_user_regs': arch/powerpc/kernel/signal_32.c:565:36: error: macro "unsafe_copy_from_user" requires 4 arguments, but only 3 given Guenter