From patchwork Tue Dec 17 18:34:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 181901 Delivered-To: patch@linaro.org Received: by 2002:ac9:44c4:0:0:0:0:0 with SMTP id t4csp6069016och; Tue, 17 Dec 2019 10:34:29 -0800 (PST) X-Google-Smtp-Source: APXvYqzw4mb2RDc0lqwpgVg16QtDWLEOm2JtzYfLToq6ZB0pvKQjbh3IlZllWdVM9CLQveqPG106 X-Received: by 2002:a9d:1b4e:: with SMTP id l72mr40115408otl.345.1576607669381; Tue, 17 Dec 2019 10:34:29 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1576607669; cv=none; d=google.com; s=arc-20160816; b=xXbd49DMcKQbGWnzvc62JGWDed6mtMzIeyQs9dvx9q+SEEifcKagMiyDyXueUdB5mb Kgah5fS6w5I8doFgTiI6KF2vISx7yDo9p2OqJbeY+y1QrFEGbNNNoL/lgz98SEMNlCaE /idOc7xcVxF9rFN7lDKsfqZs4L8qoVQiR0Z8wSBqspcnfou+A/BQzCjrZv5aR6AQRFvz Qy+Mtg4HH3vz84zKrKcXRAeOS+8ZOGzkevNuuFZaeniiYO0N5Mi3JZUDY9TvkUVr/4EG ASQXKj2JZycEd4DI3c2aD6qEHRY+eMf7C/2BgVEE3tweXfkUaiIRiqzg9TyHDgXgeeRf 3+bg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=7ykdnpEiQPDyoIqAUXNxAJG7YZNsyMsc2IKIJMM67dM=; b=vo9YQ+GP8DRZEvRqQdqrzgeFFLr1Rl52BvKL0VMZLj6mGQc2nD2KYls8pSBM7RXiGi aLOvuTCmtaHXjcE/yrpjkghtzaGacj855UhPMCYJAAPQO8cih05bRp1//+BUSPT6p1de KxOWBQCdfnrecZcO2ikFHlE532NYLj7CPab3lE7gWdjishKnr3jeqkN+YIB+El1NYuod Gu9LiRA9Aj9e5e9a6UyeJVixSqeZEJOZ6L8ZS/b/87J2U3YGmaFQdOUEE4eX1RAnUqT1 wJygRaJXWtRt9Zol+JJjNNk7Eu24RmFE2Wqo2DQQbq/cnIr6CBiaQbzTvDlPNSFP8klH I4wQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id t195si12900691oih.209.2019.12.17.10.34.29; Tue, 17 Dec 2019 10:34:29 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728309AbfLQSe2 (ORCPT + 27 others); Tue, 17 Dec 2019 13:34:28 -0500 Received: from foss.arm.com ([217.140.110.172]:44800 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728181AbfLQSeZ (ORCPT ); Tue, 17 Dec 2019 13:34:25 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id AC20131B; Tue, 17 Dec 2019 10:34:24 -0800 (PST) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 41E893F67D; Tue, 17 Dec 2019 10:34:23 -0800 (PST) From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, will@kernel.org, maz@kernel.org, mark.rutland@arm.com, dave.martin@arm.com, catalin.marinas@arm.com, ard.biesheuvel@linaro.org, christoffer.dall@arm.com, Suzuki K Poulose , Will Deacon Subject: [PATCH v2 5/7] arm64: ptrace: nofpsimd: Fail FP/SIMD regset operations Date: Tue, 17 Dec 2019 18:34:00 +0000 Message-Id: <20191217183402.2259904-6-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191217183402.2259904-1-suzuki.poulose@arm.com> References: <20191217183402.2259904-1-suzuki.poulose@arm.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When fp/simd is not supported on the system, fail the operations of FP/SIMD regsets. Fixes: 82e0191a1aa11abf ("arm64: Support systems without FP/ASIMD") Cc: Will Deacon Cc: Mark Rutland Cc: Catalin Marinas Signed-off-by: Suzuki K Poulose --- arch/arm64/kernel/ptrace.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) -- 2.23.0 diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 6771c399d40c..0135b944b8db 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -637,6 +637,9 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf) { + if (!system_supports_fpsimd()) + return -EINVAL; + if (target == current) fpsimd_preserve_current_state(); @@ -676,6 +679,9 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset, { int ret; + if (!system_supports_fpsimd()) + return -EINVAL; + ret = __fpr_set(target, regset, pos, count, kbuf, ubuf, 0); if (ret) return ret; @@ -1348,6 +1354,9 @@ static int compat_vfp_get(struct task_struct *target, compat_ulong_t fpscr; int ret, vregs_end_pos; + if (!system_supports_fpsimd()) + return -EINVAL; + uregs = &target->thread.uw.fpsimd_state; if (target == current) @@ -1381,6 +1390,9 @@ static int compat_vfp_set(struct task_struct *target, compat_ulong_t fpscr; int ret, vregs_end_pos; + if (!system_supports_fpsimd()) + return -EINVAL; + uregs = &target->thread.uw.fpsimd_state; vregs_end_pos = VFP_STATE_SIZE - sizeof(compat_ulong_t);