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@amacapital.net>
Link: http://lkml.kernel.org/r/a0138ed8c709882aec06e4acc30bfa9b623b8717.1409954077.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 7461f50..0686fe3 100644 (file)
--- 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,