linux-kernel - [PATCH] x86 - hide X86_VM_MASK from userland programs v3

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 29 Apr 2008 22:10:11 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	David Woodhouse <dwmw2@...radead.org>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86 - hide X86_VM_MASK from userland programs v3

X86_VM_MASK is kernel specific flags so hide it from userland programs.

It should be defined *before* ptrace.h inclusion because of circular
link between these files

Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
---

David as you see we can't use existing CONFIG_VM86 for this purpose.
But that is my fault - I was to check this before cooking the patch.

Index: linux-2.6.git/include/asm-x86/vm86.h
===================================================================
--- linux-2.6.git.orig/include/asm-x86/vm86.h	2008-04-29 21:57:04.000000000 +0400
+++ linux-2.6.git/include/asm-x86/vm86.h	2008-04-29 21:59:15.000000000 +0400
@@ -14,12 +14,6 @@
 
 #include <asm/processor-flags.h>
 
-#ifdef CONFIG_VM86
-#define X86_VM_MASK	X86_EFLAGS_VM
-#else
-#define X86_VM_MASK	0 /* No VM86 support */
-#endif
-
 #define BIOSSEG		0x0f000
 
 #define CPU_086		0
@@ -133,6 +127,13 @@ struct vm86plus_struct {
 };
 
 #ifdef __KERNEL__
+
+#ifdef CONFIG_VM86
+#define X86_VM_MASK	X86_EFLAGS_VM
+#else
+#define X86_VM_MASK	0 /* No VM86 support */
+#endif
+
 /*
  * This is the (kernel) stack-layout when we have done a "SAVE_ALL" from vm86
  * mode - the main change is that the old segment descriptors aren't
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/