From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752483AbbJaFm5 (ORCPT ); Sat, 31 Oct 2015 01:42:57 -0400 Received: from mail.kernel.org ([198.145.29.136]:52762 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750919AbbJaFmz (ORCPT ); Sat, 31 Oct 2015 01:42:55 -0400 From: Andy Lutomirski To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Brian Gerst , Linus Torvalds , Borislav Petkov , Stas Sergeev , Andy Lutomirski Subject: [PATCH urgent 2/2] x86/vm86: Set thread.vm86 to NULL on fork/clone Date: Fri, 30 Oct 2015 22:42:46 -0700 Message-Id: <71c5d6985d70ec8197c8d72f003823c81b7dcf99.1446270067.git.luto@kernel.org> X-Mailer: git-send-email 2.4.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org thread.vm86 points to per-task information -- the pointer should not be copied on clone. Fixes: d4ce0f26c790 ("x86/vm86: Move fields from 'struct kernel_vm86_struct' to 'struct vm86'") Signed-off-by: Andy Lutomirski --- arch/x86/kernel/process.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 2199d9b774c8..b9ac5434e176 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -83,6 +83,9 @@ EXPORT_SYMBOL_GPL(idle_notifier_unregister); int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { memcpy(dst, src, arch_task_struct_size); +#ifdef CONFIG_VM86 + dst->thread.vm86 = NULL; +#endif return fpu__copy(&dst->thread.fpu, &src->thread.fpu); } -- 2.4.3