From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZqDhYNHGEGZqJ/w2whVWbmUSPcPVs/fgDaP6qAf2jEaD3gQDF1k7AUowTA1wlHzpTTJJNpF ARC-Seal: i=1; a=rsa-sha256; t=1526937932; cv=none; d=google.com; s=arc-20160816; b=SngIvjGlvPZwgHXyW2JOASR9KOIwaks/WKiRYjh2AcQ/5gX5mOUzjGQ4ndqP1S2nXS Ca/Km8SMRLcFu1PKTt2MDgbcBwUEOtzuX+GzCNDMVf1Yalp+RR0TYZKVUrC8x4ZphTZk ApwBbKEMCX4mQZPhP4a57VEOs0b/hk8C8Y8mHQp8u7Z2Xms0DdgAZfhJlz5e6jlPvKYa mjcr5N4wXksPqbuNUTKk3F5aIgVNl3IIro6Kf1g2GN6EezSyCCDfJg0y/ZMJWXscqP3h M/8Ds/n9o1roKR9QluP9lPZbXVjbr8w2vTcnBqDPZwtLS3KSJRMincnHKtI9UxZydhXx PcuQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=e6c4duRE+ZH+UbsUKx+0oVmngMphFKOlINvbWnBkbJg=; b=fr1RA1jOTfIwT9GLtS4+ULfGOcGCOgEx80qTDbM8m+oDm82R6ufx4cSHtmSGt7K+sa xeuAU54vwzj9QgC1eNJSV82yfGn/Sz9P8HWCfO07v9xBL2SVEJKKC5LbDHj3zoA+Icse hJH2lM9UZjSt6oEMrVWQHRH2sOx5JPrGMOIxk1KoPagslXBlRMXUC2naMqpirtNZWS4E 3MpJn2PSgsc6Vp//xK2hKo4gt6AU3LIVYEzSUwicpeEfJYgem3VPJwHYgZPDeE2UxyZi M2zYH4L+IssQIkIfAp7NBlY1KYiEgHXVrkzYEE+5pBAjwHkWVsaB4w2zGey6EwviwDNh iPhA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=m4xQRGGV; spf=pass (google.com: domain of srs0=nia/=ii=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=nia/=II=linuxfoundation.org=gregkh@kernel.org Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=m4xQRGGV; spf=pass (google.com: domain of srs0=nia/=ii=linuxfoundation.org=gregkh@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=SRS0=nia/=II=linuxfoundation.org=gregkh@kernel.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kees Cook , Thomas Gleixner Subject: [PATCH 4.16 079/110] proc: Provide details on speculation flaw mitigations Date: Mon, 21 May 2018 23:12:16 +0200 Message-Id: <20180521210513.220298217@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180521210503.823249477@linuxfoundation.org> References: <20180521210503.823249477@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1601109972788944421?= X-GMAIL-MSGID: =?utf-8?q?1601110469237733001?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kees Cook commit fae1fa0fc6cca8beee3ab8ed71d54f9a78fa3f64 upstream As done with seccomp and no_new_privs, also show speculation flaw mitigation state in /proc/$pid/status. Signed-off-by: Kees Cook Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- fs/proc/array.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -85,6 +85,7 @@ #include #include #include +#include #include #include #include @@ -347,6 +348,27 @@ static inline void task_seccomp(struct s #ifdef CONFIG_SECCOMP seq_put_decimal_ull(m, "\nSeccomp:\t", p->seccomp.mode); #endif + seq_printf(m, "\nSpeculation Store Bypass:\t"); + switch (arch_prctl_spec_ctrl_get(p, PR_SPEC_STORE_BYPASS)) { + case -EINVAL: + seq_printf(m, "unknown"); + break; + case PR_SPEC_NOT_AFFECTED: + seq_printf(m, "not vulnerable"); + break; + case PR_SPEC_PRCTL | PR_SPEC_DISABLE: + seq_printf(m, "thread mitigated"); + break; + case PR_SPEC_PRCTL | PR_SPEC_ENABLE: + seq_printf(m, "thread vulnerable"); + break; + case PR_SPEC_DISABLE: + seq_printf(m, "globally mitigated"); + break; + default: + seq_printf(m, "vulnerable"); + break; + } seq_putc(m, '\n'); }