From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kees Cook Subject: [PATCH 4.9 39/39] KPTI: Report when enabled Date: Wed, 3 Jan 2018 21:11:53 +0100 Message-Id: <20180103195105.807947267@linuxfoundation.org> In-Reply-To: <20180103195104.066528044@linuxfoundation.org> References: <20180103195104.066528044@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Kees Cook Make sure dmesg reports when KPTI is enabled. Signed-off-by: Kees Cook Signed-off-by: Greg Kroah-Hartman --- arch/x86/mm/kaiser.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/arch/x86/mm/kaiser.c +++ b/arch/x86/mm/kaiser.c @@ -10,6 +10,9 @@ #include #include +#undef pr_fmt +#define pr_fmt(fmt) "Kernel/User page tables isolation: " fmt + #include #include /* to verify its kaiser declarations */ #include @@ -292,7 +295,7 @@ enable: return; disable: - pr_info("Kernel/User page tables isolation: disabled\n"); + pr_info("disabled\n"); silent_disable: kaiser_enabled = 0; @@ -352,6 +355,8 @@ void __init kaiser_init(void) kaiser_add_user_map_early(&debug_idt_table, sizeof(gate_desc) * NR_VECTORS, __PAGE_KERNEL); + + pr_info("enabled\n"); } /* Add a mapping to the shadow mapping, and synchronize the mappings */