[3.16.y-ckt stable] Patch "x86, x32, audit: Fix x32's AUDIT_ARCH wrt audit" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    x86, x32, audit: Fix x32's AUDIT_ARCH wrt audit

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt2.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 23f17acb0b4ac842c27330e50d8c244a64ceef20 Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <luto at amacapital.net>
Date: Fri, 5 Sep 2014 15:13:52 -0700
Subject: x86, x32, audit: Fix x32's AUDIT_ARCH wrt audit

commit 81f49a8fd7088cfcb588d182eeede862c0e3303e upstream.

is_compat_task() is the wrong check for audit arch; the check should
be is_ia32_task(): x32 syscalls should be AUDIT_ARCH_X86_64, not
AUDIT_ARCH_I386.

CONFIG_AUDITSYSCALL is currently incompatible with x32, so this has
no visible effect.

Signed-off-by: Andy Lutomirski <luto at amacapital.net>
Link: http://lkml.kernel.org/r/a0138ed8c709882aec06e4acc30bfa9b623b8717.1409954077.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa at linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 arch/x86/kernel/ptrace.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 678c0ada3b3c..b1a5dfa24789 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -1441,15 +1441,6 @@ void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
 	force_sig_info(SIGTRAP, &info, tsk);
 }

-
-#ifdef CONFIG_X86_32
-# define IS_IA32	1
-#elif defined CONFIG_IA32_EMULATION
-# define IS_IA32	is_compat_task()
-#else
-# define IS_IA32	0
-#endif
-
 /*
  * We must return the syscall number to actually look up in the table.
  * This can be -1L to skip running any syscall at all.
@@ -1487,7 +1478,7 @@ long syscall_trace_enter(struct pt_regs *regs)
 	if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
 		trace_sys_enter(regs, regs->orig_ax);

-	if (IS_IA32)
+	if (is_ia32_task())
 		audit_syscall_entry(AUDIT_ARCH_I386,
 				    regs->orig_ax,
 				    regs->bx, regs->cx,
--
2.1.0