[tip:x86/urgent] x86/asm/entry/32: Fix user_mode() misuses

tip-bot for Andy Lutomirski
2015-03-10T10:08:17Z

Commit-ID: 394838c96013ba414a24ffe7a2a593a9154daadf
Gitweb: http://git.kernel.org/tip/394838c96013ba414a24ffe7a2a593a9154daadf
Author: Andy Lutomirski <luto@amacapital.net>
AuthorDate: Mon, 9 Mar 2015 17:42:31 -0700
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 10 Mar 2015 04:21:51 +0100

x86/asm/entry/32: Fix user_mode() misuses

The one in do_debug() is probably harmless, but better safe than sorry.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: <stable@vger.kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/d67deaa9df5458363623001f252d1aee3215d014.1425948056.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/kernel/traps.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 9d2073e..4ff5d16 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -384,7 +384,7 @@ dotraplinkage void do_bounds(struct pt_regs *regs, long error_code)
goto exit;
conditional_sti(regs);

- if (!user_mode(regs))
+ if (!user_mode_vm(regs))
die("bounds", regs, error_code);

if (!cpu_feature_enabled(X86_FEATURE_MPX)) {
@@ -637,7 +637,7 @@ dotraplinkage void do_debug(struct pt_regs *regs, long error_code)
* then it's very likely the result of an icebp/int01 trap.
* User wants a sigtrap for that.
*/
- if (!dr6 && user_mode(regs))
+ if (!dr6 && user_mode_vm(regs))
user_icebp = 1;

/* Catch kmemcheck conditions first of all! */