From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AG47ELv38dDqj4Lrp9i3Pc00uau3V2KjR/AR7bAzYt0D4o9JU3GWDpRI+qHUuzxnKPMce9YgFwVg ARC-Seal: i=1; a=rsa-sha256; t=1520824071; cv=none; d=google.com; s=arc-20160816; b=kb3Rxrbbdm9yXiHLqKP9Its694TfaRPSOku72XQLQMKcGIyb5ZO6BzwXVdNHaHzYPM befnnUbW09mpR14DkZCzikKofkH/yg/3M3PFh180Rp4euoBiKjlivtMKnRnAlIyfzm0/ wybFZ0WrOQemB3zW9oEslgbmaKdqJlxSf04wqTxlCVCrWsTdCZlKU7axLwFRNtcmVp9t npL2Y9dc56Mt7AWNKOceJMmx3Xe9dRjFNmxo/sM1NyhpEqxESXO9bzXf5OY7tJ6EwvpZ gZ1madrU9obdgeHcbCfw2f7VBfRou7BmLpYt/+KHdpIgANO7AqknkVJ7qsWmXGjP+PL+ JwVA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=in-reply-to:subject:message-id:date:cc:to:from:mime-version :content-transfer-encoding:content-disposition :arc-authentication-results; bh=ldReD5xrAoiTm91DloStiUWwHsfznnHZZ1wWcmvNS3M=; b=uJOTXhduKV0wdjTt3OdkkjcmrsG7cD1ykerLy2yJnQFaJfc+6oN5KDeZFrF89yg1BO bkcYhhVVFd52OoBXvGT4k93zr6gNwRMSt4WDWDSeqTE8DcxQu0sRB04CQigotS3UW/KM 3wbruuGf9pyQ3VhzImV3dsdcUDDjM7/5C90BJc/mzGc3nx9UKD5k9NvEMiku8BPjVtOv IFRIMnULz3WJ39mx7oUCoWRelbEVjHTmMJEg5EZHQds7r8YbdS/7dSo5vWxfQKUz0ibe x+jscSBvBBxXs4igdtzMB0r2joacGBcsJvKnVVmHUzhLzfxrrBsHmqnmzXBpi8HUygXv vCyA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of ben@decadent.org.uk designates 88.96.1.126 as permitted sender) smtp.mailfrom=ben@decadent.org.uk Authentication-Results: mx.google.com; spf=pass (google.com: domain of ben@decadent.org.uk designates 88.96.1.126 as permitted sender) smtp.mailfrom=ben@decadent.org.uk Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, linux-arch@vger.kernel.org, gregkh@linuxfoundation.org, "Dan Williams" , alan@linux.intel.com, "Thomas Gleixner" , torvalds@linux-foundation.org, "Jiri Slaby" , kernel-hardening@lists.openwall.com Date: Mon, 12 Mar 2018 03:06:12 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 59/76] x86/spectre: Report get_user mitigation for spectre_v1 In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:6f00:88c8:c921:d332 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1594699618118932201?= X-GMAIL-MSGID: =?utf-8?q?1594699621418418242?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 3.16.56-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Dan Williams commit edfbae53dab8348fca778531be9f4855d2ca0360 upstream. Reflect the presence of get_user(), __get_user(), and 'syscall' protections in sysfs. The expectation is that new and better tooling will allow the kernel to grow more usages of array_index_nospec(), for now, only claim mitigation for __user pointer de-references. Reported-by: Jiri Slaby Signed-off-by: Dan Williams Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: kernel-hardening@lists.openwall.com Cc: gregkh@linuxfoundation.org Cc: torvalds@linux-foundation.org Cc: alan@linux.intel.com Link: https://lkml.kernel.org/r/151727420158.33451.11658324346540434635.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Ben Hutchings --- arch/x86/kernel/cpu/bugs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -353,7 +353,7 @@ ssize_t cpu_show_spectre_v1(struct devic { if (!boot_cpu_has_bug(X86_BUG_SPECTRE_V1)) return sprintf(buf, "Not affected\n"); - return sprintf(buf, "Vulnerable\n"); + return sprintf(buf, "Mitigation: __user pointer sanitization\n"); } ssize_t cpu_show_spectre_v2(struct device *dev,