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=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 E7DEAC43460 for ; Mon, 12 Apr 2021 16:27:49 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A00FE61401 for ; Mon, 12 Apr 2021 16:27:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A00FE61401 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=z8L8cHXxJKG18gnw8n0uuQnJuSr9h46S4zFhlDkBKFs=; b=Fjb+6JVsykRe68Oq5u7XATkFg kuu8kEFA74ceKuxmkt1es1yB7wbTJB1m4IZG9lZE12i8g1NwpGs070dImJirSDDkTVyu7eTbExX3A mvu/jfz4RXtUd4JjdKaT98ofSc6Ot5wdx1ESG8E2alzwuqI8cH5cL9542kgjg1HN+vTRec0biu0It 9MOLtuZL3H9AoIbNH4hmVGf1H/m3RxaSoC1CJEuCgTf+7Xm0m47PnJXr/sxvA6y8FLplISQn9O6mM c301mFOJsGHAR9bbWPyXF+U3KEPpcz1/0fdrB1vE5RV7zXZOB/oqZ+RsGEiZJ/ZDvA0Ur3hf6fCRV dycj1pDbg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lVzPf-007GBF-3O; Mon, 12 Apr 2021 16:27:47 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lVzPc-007G9e-50 for linux-snps-arc@desiato.infradead.org; Mon, 12 Apr 2021 16:27:44 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=R1NEVvUteouXA5MteP//qyTtAORCS5muGhYtuIjS0nA=; b=TSuyg8GXU+GYG+r4GrPgalHvDo gJ7FFyjB0U3bdtTSKEf9z+pZGmLK3r9ii6Gb4OxLYdzGVr1rSr50voYQ28j5Q8/yJ4gdXaiX6CXbd zErMRd+wgIf2fPkjUsvuHFZTHjPWupd7wXds7NGduvNtCPOrLEiWXy4SN49ny7tgCI7oKVNIw3me/ 7/DCugsyS3KpPCG5dA/Gg5sBSIO5WTSAprjGKhiQC/uujuEHp/T/GgycLTWNeL236cMDjJb3X8QVf w7cjM0A+dZ2EtkwdqiA+Dp0QUgNe81ig+eA6+2z7SKDIZjuap7trI9opc+QU6SALXam5hcXan9XRv Z+D0xs5g==; Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lVzPZ-006OsM-Mr for linux-snps-arc@lists.infradead.org; Mon, 12 Apr 2021 16:27:42 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id A8F2D6136F; Mon, 12 Apr 2021 16:27:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618244861; bh=o0maZVGYgCnzP4OfbpZ1TajAz/ChKWpbamAKFME+umo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BRxMHB8EQGgMJGbbz1q47w7AOYE5LHIClkZW4V6qHz/bB55O6OvL0/JmUARcgcPwz TjZQzs91zhwTWloG5scRy6L7oF4JxmA0hYCTiTa4QOcjcdrxkKgYTgcZmSGG46/uwK Jlby5O4yaPv+rp+UBxwXh9M3C5xTjZ594O8fwAR3q9gRwGXW1CqXjWkXQKzx5sXlf0 7srFg+C1ZUKCUKOFHRJ2n9XYsrMEew8hidk82jro0udESydp5IYGXlh8HHBebHthk4 a/oyOkTp99ULQDIpwmzXS+9rZPr+2+UagC/ojnBHHSNzziAKnXMnWwaMyAZHYwj7C0 GW9WSSrFFT0YQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wang Qing , Vineet Gupta , Sasha Levin , linux-snps-arc@lists.infradead.org Subject: [PATCH AUTOSEL 4.4 03/23] arc: kernel: Return -EFAULT if copy_to_user() fails Date: Mon, 12 Apr 2021 12:27:16 -0400 Message-Id: <20210412162736.316026-3-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210412162736.316026-1-sashal@kernel.org> References: <20210412162736.316026-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210412_092741_784109_3C81FD9A X-CRM114-Status: UNSURE ( 9.34 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org From: Wang Qing [ Upstream commit 46e152186cd89d940b26726fff11eb3f4935b45a ] The copy_to_user() function returns the number of bytes remaining to be copied, but we want to return -EFAULT if the copy doesn't complete. Signed-off-by: Wang Qing Signed-off-by: Vineet Gupta Signed-off-by: Sasha Levin --- arch/arc/kernel/signal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c index 257b8699efde..639f39f39917 100644 --- a/arch/arc/kernel/signal.c +++ b/arch/arc/kernel/signal.c @@ -97,7 +97,7 @@ stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs, sizeof(sf->uc.uc_mcontext.regs.scratch)); err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t)); - return err; + return err ? -EFAULT : 0; } static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf) @@ -111,7 +111,7 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf) &(sf->uc.uc_mcontext.regs.scratch), sizeof(sf->uc.uc_mcontext.regs.scratch)); if (err) - return err; + return -EFAULT; set_current_blocked(&set); regs->bta = uregs.scratch.bta; -- 2.30.2 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc